WHO WE ARE
At Cramer Fish Sciences, we help clients in California, Oregon, Idaho, Washington, Montana and Alaska find reliable and practical solutions to challenges with fish populations and riparian and aquatic ecology.
We use science to help solve issues with salmon and trout populations along the entire West Coast.
Cramer Fish Sciences is built around a core group of senior scientists with distinguished careers in fish, aquatic ecology, genetics, biostatistics, and population modeling, mixed with upcoming scientists that have outstanding scholastic achievement and fresh training in leading-edge methods and technologies. Support, field research, and population monitoring is provided by teams of well-rounded full-time and seasonal technical and field staff.
Brad Cavallo, M.S.Vice President, Principal Scientist Auburn, California
Joseph E. Merz, Ph.D.President, Principal Scientist
Adjunct Professor (UCSC) West Sacramento, California
Olivia Hipes, MBAChief Financial Officer Portland, Oregon
Philip Roni, Ph.D.Vice President, Principal Scientist
Affiliate Professor (UW) Issaquah, Washington
Brad Cavallo, M.S.
Vice President, Principal Scientist
B.S. Fisheries Biology; M.S. Aquatic Ecology
Phone: (530) 240-6448
Brad has more than 23 years of experience working on anadromous and estuarine fishery issues in California, and has attained expert knowledge of regulated rivers and estuaries, particularly related to the ecology of Chinook Salmon and other anadromous fishes. Brad excels in high-level data analysis—including life-cycle modeling and simulation modeling of management impacts—and the development, application, and evaluation of quantitative models for assessing aquatic habitats and fish population dynamics. Brad previously served as an environmental scientist with the California Department of Water Resources and was the lead scientist for hydropower re-licensing.
Cavallo, B. et al. 2015. Predicting juvenile Chinook routing in riverine and tidal channels of a freshwater estuary. Environmental Biology of Fishes 98(6):1571-1582.
Cavallo, B., J. Merz, J. Setka. 2012. Effects of predator and flow manipulation on Chinook Salmon (Oncorhynchus tshawytscha) survival in an imperiled estuary. Environmental Biology of Fish. Published online April 2012. DOI 10.1007/s10641-012-9993-5.
Merz, J., S. Hamilton, P. Bergman, and B. Cavallo. 2012. Spatial perspective for Delta Smelt: a summary of survey data. California Fish and Game 97(4):164-189.
J. Merz, M. Workman, D. Threloff, and B. Cavallo. 2013. Salmon life cycle considerations to guide stream management: examples from California’s Central Valley. San Francisco Estuary and Watershed Science 11(2). Available at: http://www.escholarship.org/uc/item/30d7b0g7.
Delaney, D., P. Bergman, B. Cavallo and J. Melgo. 2014. Stipulation study: steelhead movement and survival in the South Delta with adaptive management of Old and Middle River flows. California Department of Water Resources Technical Report.
Cavallo, B., P. Gaskill, J. Melgo. 2012. Investigating the influence of tides, inflows, and exports on sub-daily flow in the Sacramento-San Joaquin Delta. Available at: http://www.fishsciences.net/reports/2013/Cavallo_et_al_Delta_Flow_Report.pdf.
Cavallo B., et al. 2016. Coleman National Fish Hatchery Adaptive Management Plan. United States Bureau of Reclamation. December 2016. Available at: https://www.usbr.gov/ mp/battlecreek/docs/pd-cnfhamp.pdf.
Cavallo B., et al. 2014. Hatchery and Genetics Management Plan for Feather River Hatchery Spring-run Chinook Program. California Department of Water Resources. June, 2014.
Seesholtz, A., B. Cavallo, and others. 2003. Lower Feather River juvenile fish communities: distribution, emigration patterns, and association with environmental variables. American Fisheries Society Symposium 39:141-166.
Zeug, S.C. & B.J. Cavallo. 2014. Controls on the entrainment of juvenile Chinook Salmon (Oncorhynchus tshawytscha) into large water diversions and estimates of population-level loss. PLoS One 9(7):e101479. Doi:10.1371/journal.pone.0101479.
Joseph E. Merz, Ph.D.
President, Principal Scientist, Adjunct Professor (UCSC)
B.S. Environmental and Systematic Biology; M.S. Biological Conservation; Ph.D. Conservation Ecology
Phone: (916) 250-2344
West Sacramento, California
Joe has more than 26 years of experience working for state, city, university, and public entities as a fisheries ecologist, performing studies and monitoring fish populations to protect and enhance their habitat. He has performed numerous assessments of habitat manipulation on aquatic resources, including habitat enhancement, flow manipulation, invasive species, and regulation implementation, particularly for Chinook Salmon and steelhead. Joe has extensive experience with habitat typing and delineation with the use of GIS and aerial maps, has designed multi-million dollar projects to restore river channels and floodplains, and has trained numerous professionals in these techniques.
Gundersen, D.T., S.C. Zeug, R.B. Bringolf, J.E. Merz, Z. Jackson, and M.A.H. Webb. 2017. Tissue Contaminant Burdens in San Francisco Estuary White Sturgeon (Acipenser transmontanus): Implication for Population Recovery. Springer Science+Business
Sellheim, K., M. Willmes, J.A. Hobbs, J.J.G. Glessner, Z.J. Jackson, and J.E. Merz. 2017. Validating Fin Ray Microchemistry as a Tool to Reconstruct the Migratory History of White Sturgeon Acipenser transmontanus. Transactions of the American Fisheries Society. 146:844–857.
Merz, J.E., P.S. Bergman, J.L. Simonis, D. Delaney, J. Pierson, and P. Anders. 2016. Long- Term Seasonal Trends in the Prey Community of Delta Smelt (Hypomesus transpacificus) Within the Sacramento-San Joaquin Delta, California. Estuaries and Coasts, 39(5), pp.1526-1536.
Sabal, M., S. Hayes, J. Merz, and J Setka. 2016. Habitat Alterations and a Nonnative Predator, the Striped Bass, Increase Native Chinook Salmon Mortality in the Central Valley, California. North American Journal of Fisheries Management. 36(2):309-320.
Sellheim, K.L., M. Vaghti, and J.E. Merz. 2016. Vegetation recruitment in an enhanced floodplain: Ancillary benefits of salmonid habitat enhancement. Limnologica-Ecology and Management of Inland Waters. 58:94-102.
Anderson, J.T., J.E. Merz, C.B. Watry, and M.K. Saiki. 2015. Comparison of selected population characteristics of adult Chinook salmon during upstream passage through a resistance board weir and during carcass surveys. California Fish and Game.
Merz, J.E., D.G. Delaney, J.D. Setka, and M.L. Workman. 2015. Seasonal Rearing Habitat in a Large Mediterranean-Climate River: Management Implications at the Southern Extent of Pacific Salmon (Oncorhynchus spp.). River Research and Applications.
Sellheim, K.L., C.B. Watry, B. Rook, S.C. Zeug, J. Hannon, J. Zimmerman, K. Dove, and J.E. Merz. 2015. Juvenile salmonid utilization of floodplain rearing habitat after gravel augmentation in a regulated river. River research and applications.
Anderson, I.J., M.K. Saiki, K. Sellheim, and J.E. Merz. 2014. Effect of Didymoshenia geminata blooms on benthic macroinvertebrates in the Lower American River California. Southwestern Association of Naturalists.
Merz, J., T.M. Garrison, P.S. Bergman, S. Blankenship, J.C. Garza. 2014. Morphological discrimination of genetically distinct Chinook Salmon populations: An example from California’s Central Valley. North American Journal of Fisheries Management.
Merz, J.E., P.S. Bergman, J.F. Melgo, and S. Hamilton. 2013. Longfin smelt: spatial dynamics and ontogeny in the San Francisco Estuary, California. California Fish and Game, 99(3):122-148.
Merz, J.E., M. Workman, D. Threloff, and B. Cavallo. 2013. Salmon Lifecycle Considerations to Guide Stream Management: Examples from California’s Central Valley. San Francisco Estuaries.
Philip Roni, Ph.D.
Vice President, Principal Scientist, Affiliate Professor (UW)
B.A. Business Administration (Marketing); M.S. Fisheries Science; Ph.D. Aquatic and Fishery Sciences
Phone: (206) 960-4484
Phil has more than 25 years of experience as a fisheries research scientist and directs the CFS Northwest science team. He focuses on designing, implementing, completing, and publishing definitive studies to address pressing questions related to protection, management, and restoration of aquatic systems. His research for the last 20 years has concentrated on planning, prioritization, and evaluation of various watershed restoration techniques. He regularly teaches courses and has published numerous papers on restoration science, including the comprehensive book, “Stream and Watershed Restoration: A Guide to Restoring Riverine Processes and Habitats” (2013 Wiley-Blackwell).
Roni, P., Johnson, C., T. DeBoer, T. and G. Pess. 2016. Interannual variability in the effects of physical habitat and parentage on Chinook salmon egg-to-fry survival. Canadian Journal of Fisheries and Aquatic Sciences 73:1-13.
Roni, P., T. Beechie, G. Pess and C. Jordan. 2015. Basin scale monitoring of river restoration: recommendations from case studies in the Pacific Northwest USA. Managing the impact of Human Activities on Fish Habitat: American Fisheries Society Symposium 78: 1-26.
Roni, P., T. Beechie, G. Pess, and K. Hanson. 2015. Wood placement in river restoration: Fact, fiction and future direction. Canadian Journal of Fisheries and Aquatic Sciences 72(3): 466-478.
Roni, P., and T. Beechie. 2013. Stream and watershed restoration: a guide to restoring riverine processes and habitats. Wiley-Blackwell, Chichester, U.K.
Roni, P. and 8 coauthors. 2012. Factors affecting migration timing, growth and survival of juvenile coho salmon in two coastal Washington watersheds. Transactions of the American Fisheries Society 141: 890-906.
Roni, P., G. Pess, S. T. Beechie and S. Morley. 2010. Estimating changes in coho salmon and steelhead abundance from watershed restoration: how much restoration is needed to measurably increase smolt production? North American Journal of Fisheries Management 30:1469-1484.
Roni, P., K. Hanson, and T. Beechie. 2008. Global review of physical and biological effectiveness of stream rehabilitation. North American Journal of Fisheries Management 28:856-890.
Roni, P. 2005. Monitoring stream and watershed restoration. American Fisheries Society, Bethesda, Maryland. 350pp.
Roni, P., T.J. Beechie, R.E., Bilby, F.E. Leonetti, M.M. Pollock, and G.P. Pess. 2002. A review of stream restoration techniques and a hierarchical strategy for prioritizing restoration in Pacific Northwest watersheds. North American Journal of Fisheries Management. 22:1-20.
Roni, P. and T.P. Quinn. 2001. Effects of artificial wood placement on movements of trout and juvenile coho salmon in natural and artificial channels. Transactions of American Fisheries Society 130:675-685.
Principal and Senior Scientists
JoAnna Lessard, Ph.D.Senior Scientist
Mark Teply, M.S.Senior Scientist
Paul Anders, Ph.D.Principal Scientist
Adjunct Professor (UI, PSU) Moscow, Idaho
Raymond K. Timm, Ph.D.Senior Scientist
Rocko Brown, Ph.D.Senior Fluvial Geomorphologist West Sacramento, California
Steve Cramer, M.S.Founding Scientist, Fisheries Biologist Portland, Oregon
Steven Zeug, Ph.D.Science Operations Manager
JoAnna Lessard, Ph.D.
B.S. Fisheres and Wildlife Management; M.S. Fisheries Biology; Ph.D. Aquatic Entomology
Phone: (530) 240-6965
JoAnna is a stream ecologist with 15 years of combined experience carrying out research and consulting on many topics related to aquatic ecology and aquatic resource management. Her research includes temperature effects of small surface-release dams on cold water fish and invertebrates in Michigan; the marine-derived nutrient subsidy link between spawning salmon and stream communities in southeast Alaska; relationships of water management, in-stream hydraulics, and biological communities in New Zealand; and studies related to hydropower re-licensing and monitoring for impacts associated with changes in water management on state and federally-listed species of fish and amphibians in California.
O’Brien, J., J. Lessard, D. Plew, E. Graham, and A. McIntosh. 2013. Aquatic macrophytes alter metabolism and nutrient cycling in lowland streams. Ecosystems. Published online December 13, 2013.
Lessard, J., M. Hicks, T. Snelder, D. Arscott, D. Booker, S. Larned, and A. Suren. 2013. Dam design can impede adaptive management of environmental flows: a case study from the Opuha Dam, New Zealand. Environmental Management 51:459-473.
Wipfli, M. et al. 2010. Salmon carcasses increase stream productivity more than inorganic fertilizer pellets: a test on multiple trophic levels in streamside experimental channels. Transactions of the American Fisheries Society 139:824-839.
Chuluubat, S., J. Morse, J. Lessard, M. Benbow, M. Wesener and J. Hudson. 2009. Evolution of the terrestrial habitat in Manophylax species (Trichoptera: Apataniidae), with a new species from Alaska. Journal of the North American Benthological Society 29(2):413-430.
Lessard, J., R. Merritt and M. Berg. 2009. Investigating the effect of marine-derived nutrients from spawning salmon on macroinvertebrate secondary production in southeast Alaskan streams. Journal of the North American Benthological Society 28(3):683-693.
Hayes, D., H. Dodd, and J. Lessard. 2008. Effects of small dams on cold-water stream fish communities. Reconciling Fisheries with Conservation: Proceedings of the Fourth World Fisheries Congress, USA.
Lessard, J. and R. Merritt. 2006. Influence of marine-derived nutrients on aquatic insect communities in Southeast Alaskan streams. Oikos 113:334-343.
U.S. EPA. 2006. Concepts and approaches for the bioassessment and monitoring of non-wadeable streams and rivers. EPA/600/R-06. Office of Research and Development, National Exposure Research Laboratory.
U.S. EPA. 2005. Use of biological information to tier designated aquatic life uses in state and tribal water quality standards. EPA-822-R-05-001.
Lessard, J., R. Merritt, and K. Cummins. 2003. Growth of caddisflies (Limnephilidae: Trichoptera) in response to spring carry-over of marine-derived nutrients and food type in a Southeast Alaskan stream. International Journal of Limnology 39(1):3-14.
Mark Teply, M.S.
B.S. Forestry; M.S. Forestry
Phone: (360) 450-4580
Mark has over 35 years of natural resource management experience. He started in forest inventory and planning, pioneering the integration of spatially-based linear programming models with remote sensing technologies and enterprise inventory systems. Mid-career, Mark focused on the design, implementation, and monitoring of abandoned mine reclamation projects throughout the northern Rockies. This led to expertise in watershed analysis and restoration planning which Mark now puts to work on watershed restoration projects. His skill set includes: project management, stakeholder collaboration, watershed analyses, forest ecology and management, terrestrial habitat assessments, riparian and stream habitat evaluations, prioritization of restoration needs, prescription development, and implementation planning.
Teply, M., D. McGreer, and K. Ceder. 2014. Using simulation models to develop riparian buffer strip prescriptions. Journal of Forestry 3(112):302-311.
Teply, M., and D. McGreer. 2013. Simulating the effects of forest management on stream shade in streams in central Idaho. Western Journal of Applied Forestry 28(1):37-45.
Teply, M., D. McGreer, D. Schult, and P. Seymour. 2007. Simulating the effects of forest management on large woody debris in streams in northern Idaho. Western Journal of Applied Forestry 22(2):81-87.
Paul Anders, Ph.D.
Principal Scientist, Adjunct Professor (UI, PSU)
B.S. Natural Science; M.S. Biology; Ph.D. Natural Resources
Phone: (208) 810-4002
Paul has more than 30 years of experience in altered river ecology and restoration, including planning, design, oversight, and evaluation of physical habitat and nutrient restoration projects in first to eighth-order rivers and streams. He has contributed to the acquisition of over $30 million in fisheries, aquatic science, and restoration project funding through authorship and co-authorship of numerous grant proposals since the late 1980s, and has been involved in a variety of fisheries and aquatic science research and restoration projects with numerous agencies, tribes, organizations, and consulting teams.
Egan, J. P., R. D. Johnson, P. J. Anders and K. D. Cain. 2015. Initial characterization of embryonic development in North American Burbot. North American Journal of Aquaculture 77: 37-42
Hoyle, G. M., C. Holderman, P. J. Anders, B. Shafii, and K. I. Ashley. 2014. Water quality, chlorophyll, and periphyton responses to nutrient addition in the Kootenai River, Idaho. Freshwater Science 33:1024-1029.
Minshall, G.W., B. Shafii, W. J. Price, C. Holderman, P. J. Anders, G. Lester and P. Barrett. 2014. Effects of nutrient replacement on benthic macroinvertebrates in an ultra-oligotrophic reach of the Kootenai River, 2003-2010. Freshwater Science 33:1009-1023.
P. Anders and T. Hatten. 2012. Chapter 8: Fourth order impacts: An Aquatic Index of Biological Integrity. Pages 116-215, In: KTOI 2012. Kootenai River Ecosystem Operational Loss Assessment. Kootenai River Floodplain Ecosystem Operational Loss Assessment, Protection, Mitigation and Rehabilitation (BPA Project Number 2002-011-00). Draft Kootenai River Floodplain Ecosystem Operational Loss Assessment Report. N. Merz and 18 co-authors. 403 pp.
Jorgensen, J., P. Anders, and T. Hatten. 2012. Upper Columbia Nutrient Supplementation Project. Progress Report of Research. Project number 2008-471-00, Contract No. 52183. Reporting Period: April 2009-December 2011. Prepared for: U.S. Department of Energy, Bonneville Power Administration, Environment, Fish and Wildlife, Portland, Oregon 97208-3621. 43 pp.
Jorgensen, J. and P. Anders. 2012. Upper Columbia Salmonid Natural Production Restoration Program. Yakama Nation Fisheries Report.
Kootenai Tribe of Idaho. 2012. Kootenai River Ecosystem Operational Loss Assessment. Kootenai River Floodplain Ecosystem Operational Loss Assessment, Protection, Mitigation and Rehabilitation (BPA Project Number 2002-011-00). Draft Kootenai River Floodplain Ecosystem Operational Loss Assessment Report. N. Merz and 18 co-authors. 403 pp.
Anders, P. 2011. Libby Dam Operational Loss Assessment Project (BPA Project 200201100) Annual Subcontractor Report for FY-11. Prepared for the Kootenai Tribe of Idaho by Cramer Fish Sciences. September, 2011. 45 pp.
Raymond K. Timm, Ph.D.
B.S. Biology; M.S. Environmental Studies; Ph.D. Aquatic and Fishery Sciences
Phone: (206) 960-4386
Ray has nearly 25 years of experience in project management, fisheries science, habitat restoration, ecological modeling, geographic information systems (GIS), and environmental assessments. He has worked on a wide variety of aquatic ecosystems, from headwaters streams to Great Lakes connecting channels, high-gradient bedrock dominated mountain channels, lowland alluviated floodplain rivers, and everywhere in between. Ray has considerable experience using spatial technologies and data to analyze changes in the aquatic ecosystem conditions, and his current work is centered on quantitative multi-scale watershed assessments that facilitate restoration planning and lead to restoration actions.
Roni, P. and R.K. Timm. 2016. Lewis River Project: limiting factors and identification of restoration alternatives to fish passage. PacifiCorp. Portland, OR. 56 pp.
Timm, R.K., and P. Roni. 2016. Review of marine nearshore ecology of juvenile salmon in Puget Sound, Washington. Puget Sound Partnership. Tacoma, WA. 136 pp.
Timm, R.K., and R.C. Wissmar. 2014. Influence of natural and anthropogenic disturbances on spawning Sockeye Salmon (Oncorhynchus nerka) distributions in the Cedar River, Washington. Transactions of the American Fisheries Society. 143(3):709-720 DOI:10.1080/00028487.2014.890131
Timm, R.K. 2013. Changes in fluvial habitat conditions across a disturbance continuum: Implications for salmon restoration. Doctoral Dissertation, University of Washington, Seattle, WA.
Timm, R.K., and R.C. Wissmar. 2013. Response to disturbance in a highly managed alluvial river: does it conform to LeChatelier’s general law? Geomorphology 182: 116-124.
Timm, R.K., R. Schaefer, K. Akyuz, J. Koon, and L. Brandt. 2010. Best Management Practices (BMP) for limiting impacts during river construction projects in King County, WA. King County River and Floodplain Management Section. Seattle, WA.
Wissmar, R.C., R.K. Timm, and M.D. Bryant. 2010. Radar-derived digital elevation models and field-surveyed variables to predict distributions of juvenile Coho Salmon and Dolly Varden in remote streams of Alaska. Transactions of the American Fisheries Society. 139 (1): 288-302.
Timm, R.K. 2009. Fluvial geomorphic evaluation of a bioengineered revetment in the White River – before and one year after construction. King County Water and Land Resources Division. Seattle, WA.
Timm, R. K. and R. C. Wissmar. 2006. Multi-scale prioritization of riparian habitats for restoration and protection. Proceedings of the ninth biennial watersheds management council conference: Watersheds across boundaries: Science, Sustainability, Security. C. W. Slaughter and N. Berg, editors. Watershed Management Council, Water Resource Center Report 107, University of California, Berkley, CA.
Rocko Brown, Ph.D.
Senior Fluvial Geomorphologist
B.S. Environmental Engineering; M.S. Hydrologic Sciences; Ph.D. Hydrologic Sciences
Phone: (916) 250-2022
West Sacramento, California
Rocko is the senior fluvial geomorphologist at Cramer Fish Sciences, responsible for leading studies and analyses of hydrologic and geomorphic processes that shape fish habitat. Rocko has more than 16 years of experience analyzing hydrology, hydraulics, and sediment transport associated with projects that restored fish habitat, aided flood control, modified hydrology, removed dams, and stabilized stream banks, and he is skilled in a wide range of field methods and analytical tools employed in leading studies of fluvial geomorphology. These include surveying; remote sensing; 2D modeling of flow, sediment, and habitat; GIS analysis; hyporheic exchange; steam habitat design; and fish passage assessments.
Brown, R. A. and G.B. Pasternack. 2017. Bed and width oscillations form coherent patterns in a partially confined, regulated gravel–cobble-bedded river adjusting to anthropogenic disturbances, Earth Surface Dynamics 5:1-20. doi:10.5194/esurf-5-1-2017.
Brown, R.A., G.B. Pasternack, and T. Lin. 2016. The topographic design of river channels for form-process linkages. Environmental Management DOI 10.1007/s00267-015-0648-0.
Brown, R.A., G.B. Pasternack and W.W. Wallender. 2014. Synthetic river valleys: creating prescribed topography for form-process inquiry and river rehabilitation design. Geomorphology 214.
Brown, R. A., Pasternack, G.B. 2014. Hydrologic and topographic variability modulates channel change in mountain rivers. Journal of Hydrology 510.
Pasternack, G.B. and R.A. Brown. 2013. Ecohydraulic design of riffle-pool relief and morphological-unit geometry in support of regulated gravel-bed river rehabilitation. In I. Maddock, A. Harby, P. Kemp and P. Wood, editors. Ecohydraulics: an integrated approach. Wiley.
Brown, R. A. and G.B. Pasternack. 2013. Monitoring and assessment of the 2011-2012 gravel/cobble augmentation in the Englebright Dam reach of the Lower Yuba River, CA. Prepared for the U.S. Army Corp. of Engineers.
Brown, R. A. and G.B. Pasternack. 2012. Monitoring and assessment of the 2010-2011 gravel/cobble augmentation in the Englebright Dam reach of the Lower Yuba River, CA. Prepared for the U.S. Army Corp. of Engineers.
Beakes. M., J. Moore, N. Retford, R.A. Brown, J. Merz, and S. Sogard. 2012. Evaluating statistical approaches to quantifying juvenile Chinook Salmon habitat in a regulated California river. River Research and Applications 30(2):180-191.
Pasternack, G.B., and R.A. Brown. 2011. Ecohydraulic design of gravel-bed river rehabilitation in the Lewiston Dam reach of the Trinity River, CA. University of California at Davis, Davis, CA
Brown, R. A. and G.B. Pasternack. 2009. Comparison of methods for analyzing salmon habitat rehabilitation designs for regulated rivers. River Research and Applications 25:745-772.
Steve Cramer, M.S.
Founding Scientist, Fisheries Biologist
B.S. Fisheries Science; M.S. Fisheries Science
Phone: (503) 850-9039
Steve is the founder of Cramer Fish Sciences, and has led teams of scientists for over 43 years in the design and analysis of research efforts to resolve fisheries issues with passage at dams, habitat productivity, stream flows, hatchery supplementation, and harvestable surplus. For the past 30 years, Steve has been a fisheries consultant to state and federal agencies, Indian tribes, and private firms. He served the first 13 years of his career with the Oregon Department of Fish and Wildlife, where he directed major research programs on the Rogue and Columbia River basins. The focus of his research and consulting has been the quantitative analysis of population dynamics for salmon and steelhead.
Teply, M., S. Cramer, and Nicholas Poletika. 2012. Ecological risk assessment for salmon using spatially and temporally explicit exposure modeling: moving forward. Pages 197-210 in K. Racke, J. Cowels, T. Hall, S Jackson, J. Jenkins, J. Johnston, and B. McGaughey, editors. Pesticide Regulation and the Endangered Species Act, American Chemistry Society Books.
Pyper, B. J., S.P. Cramer, R.P. Ericksen and R.M. Sitts. 2012. Implications of mark-selective fishing for ocean harvests and escapements of Sacramento river fall Chinook salmon populations. Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science, 4(1):373-390. Available online at http://dx.doi.org/10.1080/19425120.2012.679575.
Teply, M., S.P. Cramer, and N.N. Poletika. 2012. A spatially and temporally explicit model for determining the exposure of juvenile salmon to agricultural pesticides in freshwater. Integrated Environmental Assessment and Management 8(2):271-284.
Poletika, N.N., M. Teply, L. Dominguez, S.P. Cramer, M.J. Schocken, C. Habig, M. Kern, H. Ochoa-Acuña, and G.C. Mitchell. 2012. A spatially and temporally explicit risk assessment for salmon from a prey base exposed to agricultural insecticides. Integrated Environmental Assessment and Management 8(2): 285-300.
Cramer, S. P., and N. K. Ackerman. 2009. Linking stream carrying capacity for salmonids to habitat features. Pages 225-254 in E. E. Knudsen and J. H. Michael, Jr., editors. Pacific salmon environmental and life history models: advancing science for sustainable salmon in the future. American Fisheries Society, Symposium 71, Bethesda, Maryland.
Cramer, S. P. and N. K. Ackerman. 2009. Prediction of stream carrying capacity for steelhead: the unit characteristic method. Pages 255-258 in E. E. Knudsen and J. H. Michael, Jr., editors. Pacific salmon environmental and life history models: advancing science for sustainable salmon in the future. American Fisheries Society, Symposium 71, Bethesda, Maryland.
Underwood, K. and S. P. Cramer. 2007. Simulation of human effects on bull trout population dynamics in Rimrock Reservoir, Washington. American Fisheries Society Symposium 53:79–95.
Cramer, S. P. 2000. The effect of environmentally-driven recruitment variation on sustainable yield from salmon populations. Pages 485- 503 in E.E. Knutsen, C.R. Steward, D.D. McDonald, J. E. Williams, and D.W. Reiser editors. Sustainable Fisheries Management: Pacific Salmon. Lewis Publishers, New York.
Cramer, S.P. 1997. Use of managed pulses in flow to stimulate outmigration of juvenile salmon. Proceedings of the 27th Congress of the International Association for Hydraulic Research, Volume 1: 563-568. American Society of Civil Engineers, New York, New York.
Evenson, M. D., and S.P. Cramer. 1984. An evaluation of recycling hatchery spring Chinook salmon through the sport fishery in the upper Rogue River. Information Report Series No. 84-10, Oregon Department of Fish and Wildlife, Corvallis, 18p.
Steven Zeug, Ph.D.
Science Operations Manager, Senior Scientist
B.S. Fisheries Biology; Ph.D. Wildlife and Fisheries Sciences
Phone: (916) 240-6237
Steve has more than 16 years of experience and has conducted fisheries investigations in a diversity of aquatic systems from headwater streams in Costa Rica to large floodplain rivers and estuaries in Texas and California. His interests include: river restoration, population dynamics, community interactions, and food webs, and he has conducted research on a wide range of species from gar and large river minnows to anadromous salmonids and sturgeon. Steve actively leads a team of biologists conducting numerous projects at CFS, ranging from field investigations and monitoring efforts to interdisciplinary modeling of complex adaptive management programs.
Zeug, S.C., F.V. Feyrer, A. Brodsky, and J. Melgo. 2017. Piscivore diet response to a collapse in pelagic prey populations. Environmental Biology of Fishes 1-12.
Zeug, S.C., A. Brodsky, N. Kogut, A.R. Stewart and J.E. Merz. 2014. Ancient fish and recent invaders: White Sturgeon (Acipenser transmontanus) diet response to invasive species-mediated changes in a benthic prey assemblage. Marine Ecology Progress Series 514:163-174.
Zeug, S.C. & B.J. Cavallo. 2014. Controls on the entrainment of juvenile Chinook Salmon (Oncorhynchus tshawytscha) into large water diversions and estimates of population-level loss. PLoS One 9(7): e101479. Doi:10.1371/journal.pone.0101479.
Zeug, S.C., K. Sellheim. C. Watry, B. Rook, J. Hannon, J. Zimmerman, D. Cox and J. Merz. 2014. Gravel augmentation increases spawning utilization by anadromous salmonids: a case study from California, USA. River Research and Applications 30:707-718.
Zeug, S.C., K. Sellheim. C. Watry, J.D. Wikert and J. Merz. 2014. Response of juvenile Chinook Salmon to managed flow: lessons learned from a population at the southern extent of their range in North America. Fisheries Management and Ecology 21:155-168.
Zeug, S.C. & B.J. Cavallo. 2013. Influence of estuary conditions on the recovery rate of coded wire tagged Chinook Salmon (Oncorhynchus tshawytscha) in an ocean fishery. Ecology of Freshwater Fish 22:157-168.
Zeug, S.C., P.S. Bergman, B.J. Cavallo and K.S. Jones. 2012. Application of a life cycle simulation model to evaluate impacts of water management and conservation actions on an endangered population of Chinook Salmon. Environmental Modeling and Assessment 17:455-467.
Zeug, S.C., L.K. Albertson, H.S. Lenihan, J. Hardy & B. Cardinale. 2011. Predictors of Chinook population extirpations in the Central Valley of California. Fisheries Management and Ecology 18:61-71.
Albertson, L.K., B.J. Cardinale, S.C. Zeug, H.S. Lenihan, L. Harrison and A.M. Wydzga. 2011. Impacts of gravel augmentation on invertebrate assemblages in a restored river. Restoration Ecology 19:627-638
Zeug, S.C., D. Peretti & K.O. Winemiller. 2009. Movement into floodplain habitats by Gizzard Shad (Dorosoma cepedianum) revealed by dietary and stable isotope analyses. Environmental Biology of Fishes 84:307-314.
Cheryl Dean, B.S.
B.S. Biological Sciences
Phone: (916) 250-1717
West Sacramento, California
Cheryl is the Genidaqs Laboratory Manager at Cramer Fish Sciences, and has over 21 years of experience developing laboratory techniques and generating genetic data in support of listed species conservation, fisheries and hatcheries management, and introduced species monitoring. She specializes in applying genetic tools to address natural resource management, protected species recovery, and habitat restoration issues. Cheryl’s work has primarily focused on salmonid population genetics, including applying genetic tools for mixed stock analysis (population dynamics), genetic mark-recapture (vital rates) and population genetic statistical analyses (population health). Additionally, Cheryl has worked on numerous other species, including using genetic monitoring to examine the reproductive success of sage grouse reintroduction programs, evaluate changes in population structure of California honey bee, and assess landscape effects on connectivity (gene flow) in mountain goats.
Small, M., D. Burgess, C. Dean, and K. Warheit. 2011. Does Lower Crab Creek in the Eastern Washington Desert have a native population of Chinook salmon? Transactions of the American Fisheries Society 140: 808-821.
Pearse, D., L. Wooninck, C. Dean, and J. Garza. 2007. Identification of Northeastern Pacific Rockfish Using Multilocus Nuclear DNA Genotypes. Transactions of the American Fisheries Society 136: 272-280.
Hedgecock, D., M. Banks, V. Rashbrook, C. Dean, and S. Blankenship. 2001 Applications of population genetics to conservation of Chinook salmon diversity in the Central Valley. Pages 45 to 70 in R. L. Brown, R.L., editor. Fish Bulletin 179: Contributions to the biology of Central Valley Salmonids. California Department of Fish and Game, Sacramento.
Banks, M., V. Rashbrook, M. Calavetta, C. Dean, and D. Hedgecock. 2000. Analysis of microsatellite DNA resolves genetic structure and diversity of Chinook salmon (Oncorhynchus tshawytscha) in California’s Central Valley. Canadian Journal of Fisheries and Aquatic Sciences 57(5):915-927.
Gregg Schumer, B.S.
Director of Lab Services, Senior Molecular Biologist
B.S. Molecular, Cellular, and Developmental Biology
Phone: (916) 231-1687
West Sacramento, California
Gregg has two decades of experience applying molecular biological techniques in the fields of human pathogens, vaccine production, and more recently in molecular ecology, fisheries genetics, and the detection of cryptic aquatic species by environmental DNA (eDNA). Gregg has led the effort within CFS to transfer relevant molecular biological and genetics technologies from the world of human pathogens to the study of fish ecology. Gregg has also led the development of protocols and techniques for the identification and distribution of cryptic, invasive, and listed or endangered aquatic species by eDNA.
Finger, A., G. Schumer, A. Benjamin, A. Schreier, and S. Blankenship. 2017. Effective population size of Delta Smelt. San Francisco Estuary and Watershed Sciences.
Blankenship, S., G. Schumer, J. Van Eenennaam, and Z. Jackson. 2017. Estimating number of White Sturgeon adults from egg relatedness. Fisheries Management and Ecology
Bergman, P., G. Schumer, S. Blankenship, and E. Campbell. 2016. Detection of adult Green Sturgeon using environmental DNA analysis. PLOS ONE.
Brian M. Schreier, M.R. Baerwald, J. L. Conrad, G. Schumer, and B. May. 2016. Effects of turbidity on predation of a threatened fish in the San Francisco Estuary. North American Journal of Fisheries Management.
Brandl, S., G. Schumer, B.M. Schreier, J. L. Conrad, B. May and M. R. Baerwald. 2015. Ten real-time PCR assays for detection of fish predation at the community level in the San Francisco Estuary-Delta. Molecular Ecology.
Baerwald, M.R., B.M. Schreier, G. Schumer, and B. May. 2012. Detection of threatened Delta Smelt in the gut contents of the invasive Mississippi Silverside in the San Francisco Estuary using TaqMan Assays. Transactions of the American Fisheries Society.
Hamelin, M-E., M. Baz, Y. Abed, C. Couture, P. Joubert, É. Beaulieu, N. Bellerose, M. Plante, C. Mallett, G. Schumer, G. P. Kobinger, and G. Boivin. 2010. Oseltamivir-Resistant Pandemic A/H1N1 Virus Is as Virulent as Its Wild-Type Counterpart in Mice and Ferrets. PLoS Pathogens.
Baerwald, M.R., G. Schumer, B.M. Schreier, and B. May. 2011. TaqMan assays for the genetic identification of delta smelt (Hypomesus transpacificus) and wakasagi smelt (Hypomesus nipponensis). Molecular Ecology Resources.
Blankenship, S., M. Teply, and G. Schumer. 2011. Sampling and analysis to assess brook trout (Salvelinus fontinalis) population trends in High Lake (Oregon) using environmental DNA monitoring. Report to Burns Paiute Tribe.
Kobinger, G.P., H. Feldmann, Y. Zhi, G. P. Schumer, G-P. Gao, F. Feldmann, S. Jones, and J.M. Wilson. 2006. Chimpanzee adenovirus vaccine protects against Zaire Ebola virus. Journal of Virology.
Scott Blankenship, Ph.D.
B.S. Biological Sciences; Ph.D. Genetics
Phone: (916) 231-1683
West Sacramento, California
Scott has over 18 years of experience applying genetic data to population monitoring and fishery science, including extensive technical experience combining the newest tools of molecular biology and genetics theory with field observations of fish populations and their habitat. He is a recognized expert on the standardization of genetic data and sampling methodology for salmon, and has collaborated on the design and implementation of species reintroduction programs, conservation hatchery programs, habitat restoration performance, regional genetic databases, innovative monitoring techniques, and the integration of genetic and geospatial information.
Finger, A., G. Schumer, A. Benjamin, A. Schreier, and S. Blankenship (In press) Effective population size of Delta Smelt. San Francisco Estuary and Watershed Sciences.
Blankenship, S., G. Schumer, J. Van Eenennaam, and Z. Jackson. (In review) Estimating number of White Sturgeon adults from egg relatedness. Fisheries Management and Ecology.
Bergman, P., G. Schumer, S. Blankenship, and E. Campbell (In review) Detection of adult Green Sturgeon using environmental DNA analysis. PLOS ONE.
Rawding, D.J., C.S. Sharpe, and S.M. Blankenship. 2014. Genetic-based estimates of adult Chinook Salmon spawner abundance from carcass surveys and juvenile out-migrant traps. Transactions of American Fisheries Society 143:55-67.
Moran, P., D.J. Teel, M.A. Banks, T.D. Beacham, M.R. Bellinger, S.M. Blankenship, J.R. Candy, J.C. Garza, J.E. Hess, S.R. Narum, L.W. Seeb, W.D. Templin, C.G. Wallace, and C.T. Smith. 2013. Divergent life-history races do not represent Chinook Salmon coast-wide: the importance of scale in quaternary biogeography. Canadian Journal of Fisheries and Aquatic Sciences 70:415-435 dx.doi.org/10.1139/cjfas-2012-0135.
Limborg, M.T., S.M. Blankenship, S.F. Young, F.M. Utter, L.W. Seeb, M.H.H. Hansen, and J.E. Seeb. 2011. Signatures of natural selection among lineages and habitats in Oncorhynchus mykiss. Ecology and Evolution. Available at http://onlinelibrary.wiley.com/doi/10.1002/ ece3.59/abstract.
Blankenship, S.M., M.R. Campbell, J.E. Hess, M.A. Hess, T.W. Kassler, C.C. Kozfkay, A.P. Matala, S.R. Narum, M.M. Paquin, M.P. Small, J.J. Stephenson, K.I. Warheit, and P. Moran. 2011. Major lineages and metapopulations in Columbia River Oncorhynchus mykiss are structured by dynamic landscape features and environments. Transactions of American Fisheries Society 140:665–684.
Blankenship, S.M., B. May, and D. Hedgecock. 2002. Evolution of a perfect simple-sequence-repeat locus in the context of its flanking sequence. Molecular Biology and Evolution 19(11):1943-1951.
Hedgecock, D., M.D. Banks, V.K. Rashbrook, C.A. Dean, and S.M. Blankenship. 2001. Applications of population genetics to conservation of Chinook Salmon diversity in the Central Valley. In Brown RL, editor. Fish Bulletin 179: Contributions to the biology of Central Valley salmonids. Sacramento (CA): California Department Fish and Game.
Kai Ross, Ph.D.
B.A. Applied Mathematics; M.S. Environmental Systems – Mathematical Modeling; Ph.D. Quantitative Ecology and Resource Management
Phone: (206) 960-449
Kai is a biometrician and modeler with nearly 10 years of broad experience in mathematical modeling, spatial analysis, and data visualization. His work focuses on providing decision support for natural resource management through mathematical and statistical modeling, exploring and visualizing data, and quantifying trade-offs. He has a wide-range of experience with mathematical modeling including: optimization modeling (integer and multi-objective models), simulation modeling (agent/individual-based models, growth and yield), statistical modeling (model and parameter fitting, both frequentist and Bayesian), and spatial analysis using geographic information systems (GIS).
Ross, K.L., S.F. Tóth, and W. Jaross. 2017. Forest harvest scheduling with endogenous road costs. Interfaces. In print.
Ross, K.L. 2016. Extending harvest-scheduling using spatial optimization: road access and edge effects. Ph.D. dissertation, University of Washington.
Ross, K.L., and S.F. Tóth. 2016. A model for managing edge effects in harvest scheduling using spatial optimization. Scandinavian Journal of Forest Research 31(7):646-654.
Van Kirk, R., S. Martin, K. Ross, and M. Douglas. 2014. Computer simulation modeling to determine trailhead quotas for overnight wilderness visitor use. Journal of Park and Recreation Administration 32(3).
Ross, K. 2011. A simulation model for wilderness use in Yosemite National Park. Master’s Thesis. Humboldt State University.
Kevin Ceder, M.S.
B.S. Forest Resource Management; M.S. Silviculture and Forest Protection
Phone: (206) 960-4045
Kevin has more than 15 years of experience as a quantitative ecologist and forester working with an array of environmental data, ecosystem models, and information systems to support natural resources assessment, planning, and management. He focuses on assessing the impacts of resource management on ecosystem services including riparian function, habitat, and forest health as well as designing and building information systems, ecological models, and analytical tools to store and manage data, simulate forest and ecosystem processes, and help find the information and stories in natural resource and environmental data. Kevin works with a range of platforms and programming languages including R, SQL Server, ArcGIS, Python, and C#. He regularly teaches courses on analyzing and visualizing environmental data with R.
Ceder, K. and M. Teply, K. Ross. 2016. Eastside Modeling Effectiveness Project (EMEP). Report prepared for Washington Department of Natural Resources Cooperative Monitoring, Evaluation, and Research Committee. Cramer Fish Sciences, Gresham, OR.
Ceder, K. and M. Teply. 2015. Projected changes to stream shade and instream large woody debris from active management of eastside forests in Washington State. Report prepared for the Washington Farm Forestry Association. Cramer Fish Sciences, Gresham, OR.
Teply, M., D. McGreer, and K. Ceder. 2014. Using simulation models to develop riparian buffer strip prescriptions. Journal of Forestry 112(3):302-311.
Steven P. Cramer and K. Ceder. 2013. Stream flows and potential production of spring-run Chinook Salmon and steelhead in the Upper South Fork of Battle Creek, California. Cramer Fish Sciences, Gresham, OR.
Lippke, B., K. Zobrist, and K. Ceder. 2007. Issues and alternatives associated with private forest wildlife and riparian habitat management. Pages 81-94 in USDA Forest Service Pacific Northwest Research Station General Technical Report PNW-GTR-695.
Lippke, B., L. Mason , K. Zobrist, K. Ceder, Elaine Oneil, J. McCarter, H. Imaki, and A. Sullivan. 2007. Study 1: timber supply and forest structure in the future of Washington’s forests and forestry industries – final report by the College of Forest Resources, University of Washington, Seattle Washington. 125 pp plus 13 Discussion Papers of 191pp (Full report 518pp).
Travis Hinkelman, Ph.D.
B.S. Fisheries and Wildlife; M.S. Aquaculture, Fisheries, and Wildlife Biology; Ph.D. Biological Sciences
Phone: (530) 240-6365
Travis has over 16 years of experience performing data manipulation and visualization, and he specializes in quantitative solutions to research problems in ecology and conservation. His experience includes creating simulation models of juvenile salmonid emigration, juvenile salmonid rearing habitat, and Chinook and steelhead life cycles; analyzing rotary screw trap data to produce juvenile Chinook passage estimates; predicting the probability of steelhead catch exceeding take limits; and running DSM2 Hydro simulations to evaluate operational impacts on flow and fish. He has also developed several spatially-explicit, individual-based simulation models in NetLogo and discrete-event simulation models in R.
Sturrock, A.M., J.D. Wikert, T. Heyne, C. Mesick, A.E. Hubbard, T.M. Hinkelman, P.K. Weber, G.E. Whitman, J.J. Glessner, and R.C. Johnson. 2015. Reconstructing the migratory behavior and long-term survivorship of juvenile Chinook Salmon under contrasting hydrologic regimes. PLoS One 10(5): e0122380. Doi:10.1371/journal.pone.0122380.
Nolting, B.C., T.M. Hinkelman, C.E. Brassil, and B. Tenhumberg. 2015. Composite random search strategies based on non-directional sensory cues. Ecological Complexity 22:126-138.
Hinkelman, T.M. and B. Tenhumberg. 2013. Larval performance and kill rate of convergent ladybird beetles, Hippodamia convergens, on black bean aphids, Aphis fabae, and pea aphids, Acyrthosiphon pisum. Journal of Insect Science. 13:46.
Hinkelman, T.M., J.L. Orrock, and S.C. Loeb. 2012. Effect of downed woody debris on small mammal anti-predator behavior. Ethology 118:17-23.
Hinkelman, T.M., and S.C. Loeb. 2007. Effect of woody debris abundance on daytime refuge use by cotton mice. Southeastern Naturalist 6:393-406.
Christopher Clark, M.S.Senior Field Biologist Issaquah, Washington
Jesse T. Anderson, B.S.Senior Biologist
Kirsten Sellheim, M.S.Science Operations Manager
West Sacramento, California
Lucius Caldwell, Ph.D.Science Operations Manager
Michael Beakes, Ph.D.Science Operations Manager
West Sacramento, California
Myfanwy Johnston, Ph.D.Senior Biologist
S. Matthew Drenner, Ph.D.Senior Biologist
Christopher Clark, M.S.
Senior Field Biologist
B.S. Environmental Science; M.S. Fish & Wildlife
Phone: (206) 960-4008
Chris is a senior field biologist with nearly a decade of experience in stream channel surveys, fish telemetry, GIS analysis, scientific diving, underwater monitoring, data analysis, and preparing technical reports. He currently leads field operations for two large restoration effectiveness monitoring programs, sampling over 30 salmon restoration projects across Washington, Idaho, and Oregon each year. Prior to joining CFS, Chris worked on the Elwha River in both fresh and saltwater environments monitoring both biotic and abiotic responses to the decommissioning and removal of two large dams.
Jesse T. Anderson, B.S.
B.S. Ecology and Systematic Biology
Phone: (209) 353-2225
Jesse is the Cramer Fish Sciences field office lead in Modesto, responsible for coordinating and leading field efforts for projects throughout the California Central Valley. Jesse holds a Bachelor of Science degree in Ecology and Systematic Biology (with concentrations in Fisheries and Marine Biology) from California Polytechnic State University, San Luis Obispo, and has over 18 years of experience with California fisheries science and 14 years of experience designing, constructing, operating, and monitoring resistance board weirs. Jesse has extensive experience with a wide variety of field research techniques and with environmental permitting.
Anderson, J. T., J. E. Merz, C. B. Watry, and M. K. Saiki. 2015. Comparison of selected population characteristics of adult Chinook salmon during upstream passage through a resistance board weir and during carcass surveys. California Fish and Game 101(1):24-39.
Anderson, J. T., D. Olsen, K. Sellheim, T. Hinkelman, and J. E. Merz. 2014. Juvenile salmonid out-migration monitoring at Caswell Memorial State Park in the Stanislaus River, California. 2013-2014 Biannual Report. Prepared for U.S. Fish and Wildlife Service Comprehensive Assessment and Monitoring Program. 50pp.
Anderson, J. T., C. B. Watry, and A. Gray. 2007. Upstream fish passage at a resistance board weir using infrared and digital technology in the lower Stanislaus River, California. Annual Report of Cramer Fish Sciences to U.S. Fish and Wildlife Service, Anadromous Fish Restoration Program, Grant No. 813326G004, Stockton, California.
Kirsten Sellheim, M.S.
Science Operations Manager, Senior Biologist
B.S. Ecology and Evolutionary Biology; M.S. Population Biology
Phone: (916) 250-2203
West Sacramento, California
Kirsten has 15 years of experience collecting, managing, and analyzing both spatial and non-spatial data using ArcGIS and Access databases, and has written and edited numerous scientific manuscripts and reports related to river restoration, spawning and outmigration monitoring, community ecology, invasive species, and restoration prioritization. She is the lead Fisheries Biologist for the CFS California field office in West Sacramento, coordinating and leading field efforts for monitoring and restoration projects throughout the Central Valley. She trains technicians and biologists and has developed field and laboratory protocols, study designs, and safety protocols for field monitoring.
Sellheim, K., M. Willmes, J. A. Hobbs, J. J. G. Glessner, Z. J. Jackson, and J. E. Merz. In press. Validating fin ray microchemistry as a tool to reconstruct the migratory history of White Sturgeon Acipenser transmontanus. Transactions of the American Fisheries Society.
Sellheim, K., M. Vaghti, and J. Merz. 2016. Vegetation recruitment in an enhanced floodplain: ancillary benefits of salmonid habitat enhancement. Limnologica.
Sellheim, K., C. Watry, B. Rook, S. Zeug, J. Hannon, J. Zimmerman, K. Dove, and J. Merz. 2015. Juvenile salmonid utilization of floodplain rearing habitat after gravel augmentation in a regulated river. Canadian Journal of Fisheries and Aquatic Science.
Zeug, S.C., K. Sellheim, C. Watry, J.D. Wikert, and J. Merz. 2014. Response of juvenile anadromous salmon to managed flow: lessons learned from the southern extent of Chinook salmon in North America. Fisheries Management and Ecology.
Zeug, S.C., K. Sellheim, C. Watry, B. Rook, J. Hannon, J. Zimmerman, D. Cox, and J. Merz. 2013. Gravel augmentation increases spawning utilization by anadromous salmonids: a case study from California, USA. River Research and Applications.
Sellheim, K., J. Anderson, and C. Watry. 2012. Operational Protocol for Habitat Enhancement Monitoring. Cramer Fish Sciences. 63pp.
Watry, C.B., A. Gray, K. Jones, K. Sellheim and J.E. Merz. 2011. Juvenile salmonid out-migration monitoring at Caswell Memorial State Park in the Lower Stanislaus River, California: 2010-2011 Bi-Annual Report. Cramer Fish Sciences Technical Report.
Sellheim, K.L. and C.A. Searcy. 2010. Conserving biodiversity in the endangered species assemblage of California vernal pools. Technical Report to the California Department of Fish and Game. Sacramento, CA.
Sellheim, K. L., J. J. Stachowicz, and R.C. Coates. 2010. Effects of a nonnative habitat-forming species on mobile and sessile epifaunal communities. Marine Ecology Progress Series 398: 69-80.
Lucius Caldwell, Ph.D.
Science Operations Manager, Senior Biologist
B.Sc. Biology and Philosophy; Ph.D. Biology
Phone: (503) 850-9041
Lucius is a fish biologist with over 10 years of experience in data analysis, effectiveness monitoring, physiological fish sampling, stream channel surveys, and project management. Lucius also has experience with temperature modeling, water quality and industrial product monitoring, environmental and ecological impact assessments, large-scale telemetry projects (both radio and acoustic), and database generation. Prior to joining CFS, Lucius gained experience coordinating all aspects of field operations and data analysis with an RM&E crew based in the Methow Valley (WA) that researched the effects of habitat restoration on stream ecosystem processes.
Pierce, A, J. Blodgett, T. Cavileer, L. Medeiros, J. Boyce, L. Caldwell, W. Bosch, R. Branstetter, D. Fast, D. Hatch, and J. Nagler. 2017. Reproductive development in captive reconditioned female steelhead kelts: evidence for consecutive and skip spawning life histories.” Canadian Journal of Fisheries and Aquatic Sciences EARLY VIEW (ONLINE ONLY).
Caldwell, L., A.L. Pierce, L. Riley, C. Duncan, and J.J. Nagler. 2014. Plasma Nesfatin-1 is not affected by long-term food restriction and does not predict rematuration among iteroparous female Rainbow Trout (Oncorhynchus mykiss).” PLoS ONE 9(1):e85700.
Caldwell, L., A.L. Pierce, and J.J. Nagler. 2013. Metabolic endocrine factors involved in spawning recovery and rematuration of iteroparous female Rainbow Trout (Oncorhynchus mykiss). General and Comparative Endocrinology 194:124-132.
Caldwell, L., D. Stroud, F. Carpenter, L. Belcher, M. Morasch, K. Denton, and K. Ross. 2017. Merwin Upstream Passage Adult Trap Efficiency: 2016 Final Report. Prepared by: Cramer Fish Sciences and K. Denton & Associates. Prepared for: Pacific Power (A Division of PacifiCorp).
Caldwell, L., D. Stroud, F. Carpenter, L. Belcher, K. Ross, and K. Ceder. 2017. Swift Reservoir Floating Surface Collector Juvenile Salmon Collection Efficiency: 2016 Annual Report – Final. Prepared by: Cramer Fish Sciences. Prepared for: Pacific Power (A Division of PacifiCorp).
Merz, J.E., L.K. Caldwell, and J.L. Simonis. 2017. Dry Creek Temperature Modeling & Bioenergetics Report: Final Report. Prepared by: Cramer Fish Sciences and Dapper Stats. Prepared for: Environmental Science Associates.
Timm, R., L. Caldwell, D. Stroud, P. Roni, A. Nelson, and C. Long. 2017. South Fork Clearwater River MP 28 Hypothesized Velocity Barrier: Final Report. Prepared by: Cramer Fish Sciences & Northwest Hydraulic Consultants. Prepared for: Mark Johnson, Nez Perce Tribe.
Caldwell, L.K., J.L. Simonis, C. Contor, and M. Sheoships. 2016. The Umatilla Basin Natural Production Monitoring and Evaluation Project: 2016 Annual Progress Report. Prepared by: Cramer Fish Sciences. Prepared for: Confederated Tribes of the Umatilla Indian Reservation.
Caldwell, L., J. Simonis, F. Carpenter, and L. Belcher. 2016. Technical Memorandum – NPFMC High Seas CWT DB Overhaul, Phase I: QC’d 2015 Database of CWT Release Groups Drift Creek, & Technical Memorandum – NPFMC High Seas CWT DB Overhaul, Phase II: Updated Database of CWT Release Groups (FINAL VERSION). Prepared for: North Pacific Fishery Management Council.
Michael Beakes, Ph.D.
Science Operations Manager, Senior Biologist
B.Sc. Biology; Ph.D. Biology
Phone: (916) 250-2201
West Sacramento, California
Mike develops, coordinates, and implements a broad range of habitat restoration projects and monitoring throughout California’s Central Valley. Mike has nearly 15 years of experience, with a strong combination of field-based and quantitative research, including studies on the effects of wildfire on stream temperatures and food webs, river flow regulation, salmon life-cycle models and habitat capacity, and climate change. Moreover, Michael has conducted research on the dynamics of large-scale natural and anthropogenic disturbance in stream and river ecosystems across large spatiotemporal scales.
Moore, J.W., M.P. Beakes, H.K. Nesbitt, J. Yeakel, D.A. Patterson, L.A. Thompson, C. Phillis, D. Braun, C. Favaro, D. Scott, C. Carr-Harris, and W. Atlas. 2015. Emergent stability in a large free-flowing watershed. Ecology 96:340-347.
Favaro, C., J.W. Moore, J.D. Reynolds, and M.P. Beakes. 2014. Potential loss and rehabilitation of stream longitudinal connectivity: fish populations in urban streams with culverts. Canadian Journal of Fisheries and Aquatic Sciences 71:1805-1817.
Beakes, M.P., J.W. Moore, S.H. Hayes, and S.M. Sogard. 2014. Wildfire and the effects of shifting stream temperature on salmonids. Ecosphere 5:63.
Beakes, M.P., S. Sharron, R. Charish, J.W. Moore, W.H. Satterthwaite, E. Sturm, B.K. Wells, S.M. Sogard, and M. Mangel. 2014. Using scale characteristics and water temperature to reconstruct growth rates of juvenile steelhead (Oncorhynchus mykiss). Journal of Fish Biology 84:58-72.
Beakes, M.P., J.W. Moore, N. Retford, R. Brown, J.E. Merz, and S.M. Sogard. 2014. Evaluating statistical approaches to quantifying juvenile Chinook Salmon habitat in a regulated California river. River Research and Applications 30:180-191.
Shelton, A.O., W.H. Satterthwaite, M.P. Beakes, S.P. Munch, S.M. Sogard, and M. Mangel. 2013. Separating intrinsic and environmental contributions to growth and their population consequences. American Naturalist 181:799-814.
Phillis, C.C., S.M. O’Regan, S.J. Green, J.E.B. Bruce, S.C. Anderson, J.N. Linton, Earth2Ocean Research Derby, and B. Favaro. 2013. Multiple pathways to conservation success. Conservation Letters 6:98-106.
Sogard, S.M., .E. Merz, W.H. Satterthwaite, M.P. Beakes, D.R. Swank, E.M. Collins, R.G. Titus, and M. Mangel. 2012. Contrasts in habitat characteristics and life history patterns of steelhead in California’s central coast and Central Valley. Transactions of the American Fisheries Society 141:747-760.
Beakes, M.P., W.H. Satterthwaite, E.M. Collins, D.R. Swank, J.E. Merz, R.G. Titus, S.M. Sogard, and M. Mangel. 2010. Smolt transformation in two California steelhead populations: Effects of temporal variability in growth. Transactions of the American Fisheries Society 139:1263-1275.
Myfanwy Johnston, Ph.D.
B.S. Fisheries and Wildlife; M.S. Aquaculture, Fisheries, and Wildlife Biology; Ph.D. Biological Sciences
Phone: (530) 240-6112
Myfanwy specializes in the application of biotelemetry and quantitative research methods to the fields of behavioral ecology and conservation biology. She also has expertise in surgical procedures related to acoustic biotelemetry, and has led training workshops in tagging procedures. Her data science skill set includes expertise in the R programming language, data manipulation and management, statistical analysis, visualization, and internal software tool-building, and she has particular interest in and experience with the communication of scientific research to non-scientific audiences through effective visuals.
Johnston, M., J.T. Kelly, A.P. Klimley, R. McElreath, and M.D. Lindvall. 2016. Experimental evaluation of the use of vision and barbels as references for rheotaxis in Green Sturgeon. Journal of Experimental Marine Biology & Ecology. In press.
Johnston, M., A.P. Klimley, T. Sommer, and J. Frantzich. Movement behavior of iteroparous and semelparous migrants on a modified floodplain. In prep.
Johnston, M., A. Steel, A.P. Klimley, T. Sommer, J. Frantzich, and D. Smith. Survival of juvenile late fall-run Chinook Salmon in the Yolo Bypass and the Sacramento River. In prep.
Rowlands, M. 2007. Substrata preference in foraminifera of fouling communities in Moorea, French Polynesia. UCB Moorea Class: Biology and Geomorphology of Tropical Islands. https://escholarship.org/uc/item/1n31w1ck.
S. Matthew Drenner, Ph.D.
B.A. Biology; M.S. Environmental Sciences; Ph.D. Forestry
Phone: (503) 850-9026
Matt has 15 years of experience conducting fisheries research, and is responsible for leading and managing multiple projects in the Gresham office. His experience includes analyzing: the impact of hydropower operations on homing Sockeye Salmon migration success through an impounded river system using biotelemetry, environmental and physiological influences on the behavior and survival of Sockeye Salmon homing in coastal waters, Coho Salmon bycatch mortality from commercial purse seining, effects of ecological disturbance and drought on crustacean zooplankton community structure in grassland ponds, and the use of stable isotope analysis to determine macroinvertebrate food-web structure in different lake habitats.
Patterson, D.A., Robinson, K.A., Lennox, R.J., Nettles, T.L., Donaldson, L.A., Eliason, E.J., Raby, G.D., Chapman, J.M., Cook, K.V., Donaldson, M.R., Bass, A.L., Drenner, S.M., Reid, A.J., Cooke, S.J., and Hinch, S.G. 2017. Review and evaluation of fishing-related incidental mortality for Pacific Salmon. DFO Canadian Science Advisory Secretariat Document 2017/010. ix + 155 p.
Drenner, S.M., S.G. Hinch, E.G. Martins, N.B. Furey, T.D. Clark, S.J. Cooke, D.A. Patterson, D. Robichaud, D.W. Welch, A.P. Farrell, and R.E. Thomson. 2015. Environmental conditions and physiological state influence estuarine movements of homing Sockeye Salmon. Fisheries Oceanography 24:307-324.
Wilson, S.M., S.G. Hinch, S.M. Drenner, E.G. Martins, N.B. Furey, D.A. Patterson, D.W. Welch, and S.J. Cooke. 2014. Coastal marine and in-river migration behaviour of adult sockeye salmon en route to spawning grounds. Marine Ecology Progress Series 496:71-84.
Drenner, S.M., S.G. Hinch, E.G. Martins, D. Robichaud, L.A. Thompson, D.A. Patterson, S.J. Cooke and R.E. Thomson. 2014. Variable thermal experience and diel thermal patterns of homing sockeye salmon in coastal marine waters. Marine Ecology Progress Series. 496:109-124.
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Annie Brodsky, B.S.Fisheries Biologist Auburn, California
Jesse Wiesenfeld, M.S.Fisheries Biologist West Sacramento, California
Michelle Krall, M.S.Fisheries Biologist Issaquah, Washington
Philip Colombano, M.S.Fisheries Biologist West Sacramento, California
Whitney Thorpe, M.S.Fisheries Biologist Modesto, California
Annie Brodsky, B.S.
B.S. Evolution, Ecology, and Biodiversity
Phone: (530) 240-6330
Annie has nearly 10 years of experience working on anadromous and estuarine fishery issues in California, and serves as a CFS biologist and field lead planning, conducting, and supervising field projects. Annie has extensive experience with numerous monitoring and sampling methods and equipment; with developing field and laboratory protocols and organizing field research for genetic, tagging, and monitoring studies; and with the identification and handling of sensitive species such as Delta smelt, white sturgeon, and Chinook Salmon.
Jesse Wiesenfeld, M.S.
B.S. Organismal Biology; M.S. Fisheries Biology
Phone: (916) 250-1705
West Sacramento, California
Jesse has nearly a decade of experience with otolith microstructure analysis, surgical implantation of acoustic tags, building PIT tag antenna arrays, macro-invertebrate identification, stomach content analysis, salmonid carcass and redd surveys, rotary screw trapping, seining, trawling, macroinvertebrate collection, and snorkel surveys throughout California’s Central Valley. He is an expert at identifying California’s diverse fishes, and an experienced boat operator in lakes, rivers, and deltas. Jesse is also responsible for training, managing, and hiring bio-technicians for the West Sacramento office.
Michelle Krall, M.S.
B.A. Biology – Environmental Studies; M.S. Fisheries
Phone: (206) 960-4616
Michelle has experience planning and conducting habitat effectiveness monitoring of in-stream and off-channel restoration projects. Her work has included mapping restoration sites, assessing fish response to restoration projects via snorkel surveys and seining, conducting stomach content analysis of juvenile salmonids, assessing food availability within off-channel habitats through zooplankton tows and benthic sampling, identifying macroinvertebrates, monitoring native freshwater mussels in the Klamath River basin, and statistical analysis and reporting. Michelle is responsible for planning, conducting, and supervising a variety of field staff and monitoring projects.
Philip Colombano, M.S.
B.S. Aquatic Biology; M.S. Natural Resources
Phone: (916) 250-1922
West Sacramento, California
Philip has over 10 years of experience working on a large variety of fisheries-related projects in California’s Central Valley. As the field crew leader for fisheries research conducted in the CFS West Sacramento office, Philip does pre-project planning for salmonid habitat restoration projects and facilitates environmental and regulatory compliance for field work and restoration. Prior to joining CFS, Philip gained field experience and assisted science and technical staff with document preparation and permit review.
Whitney Thorpe, M.S.
B.S. Biology; M.S. Biology
Phone: (916) 250-2131
Whitney’s experience includes conducting seining and snorkel surveys, fish identification, PIT and acoustic tagging, measuring hyporheic and surface water quality, and analyzing spawning habitat substrate characteristics. Her work has also included performing salmonid spawning and stranding surveys on the Lower American River; evaluating the effectiveness of restored floodplain habitat on the Merced River through seining surveys, PIT tag arrays, fyke nets, physical habitat monitoring, and macroinvertebrate collection; and collecting white sturgeon eggs for selenium content and genetic analysis from the Sacramento River using artificial substrate mats.
Andrew Muller, B.A.Biological Technician Portland, Oregon
Bobbie Flores, M.N.R.Biological Technician West Sacramento, California
Cierra Scriven, B.S.Biological Technician West Sacramento, California
Derek E. Arterburn, B.S.Biological Technician Issaquah, Washington
Jamie Sweeney, B.S.Biological Technician West Sacramento, California
Jeremy Agundes, B.A.Biological Technician West Sacramento, California
Katie Karpenko, B.S.Biological Technician West Sacramento, California
Kyle Horvath, B.S.Biological Technician Modesto, California
Lindsey Belcher, B.A.S.Biological Technician Portland, Oregon
Shelby Burgess, B.S.Biological Technician Issaquah, Washington
Andrew Muller, B.A.
Phone: (206) 960-4022
Andrew has experience collecting, processing, and analyzing data for a variety of projects throughout the Northwest. He has over 5 years of experience using the Columbia Habitat Monitoring Program (CHaMP) protocol and doing GIS work, including map processing and automation with ArcPy. Andrew has also worked on multiple research projects on salmon reintroduction in tributaries to the Columbia River and has extensive experience electrofishing, conducting snorkel surveys, redd surveys PIT tagging juvenile salmon, collecting benthic macroinvertebrate samples, installing temperature loggers/pressure transducers, and collecting sediment and water quality samples.
Bobbie Flores, M.N.R.
B.S. Environmental Science; M. Natural Resources – Wildlife Management
Phone: (916) 250-2065
West Sacramento, California
Bobbie has experience with bird surveys, small mammal trapping, and vernal pool dipnet surveys – including California tiger salamander and California red-legged frog. Additionally, she has extensive experience with literature review, data input, and database management. She has also worked in small animal veterinary medicine as a technician, manager, and administrator. Bobbie works in the field as a biological technician and in administrative support.
Cierra Scriven, B.S.
B.S. Wildlife, Fish and Conservation Biology
Phone: (707) 225-4800
West Sacramento, California
Cierra is highly skilled in collecting and processing data from aquatic environments. She has experience working in California’s riparian ecosystems, wetlands, and alpine lakes surveying aquatic reptiles, amphibians, fish, and vegetation. Cierra is well versed in many animal capture methodologies including dipnetting, trapping, radio telemetry tracking, electrofishing, seining, trawling, hook & line, and various invertebrate sampling techniques. She is adept at collecting environmental, geospatial, and morphological data. She also employs her knowledge of Microsoft Word, Excel, Access, and GIS to assist in data entry, fluvial geomorphology analysis, and report preparation. Additionally, she has numerous useful skills and certifications including Wilderness first aid (WFA), Open water scuba diving (PADI), watercraft operation, and a working knowledge of carpentry used in experimental design fabrication.
Derek E. Arterburn, B.S.
B.S. Aquatic and Fishery Sciences
Phone: (206) 960-4591
Derek has experience conducting long-term monitoring of fisheries and habitat restoration projects throughout the Pacific Northwest. He has a diverse history working with government and research organizations in Alaska, Washington, Oregon, and Idaho. His experience includes limnological sampling, riparian assessment, aquatic invertebrate collection, stream habitat monitoring, and fish surveys (electrofishing, snorkeling, trapping) to quantify fish abundance. Derek also has experience in report writing, mapping, conducting literature reviews, and data analysis.
Jamie Sweeney, B.S.
B.S. Marine Biology
Phone: (916) 250-1570
West Sacramento, California
Jamie leads the West Sacramento field staff and has extensive experience in collecting and analyzing physical and biological data from habitat restoration sites using snorkel and spawning surveys, invertebrate sampling, flow transect surveys, water surface elevation, and underwater video. She also has experience with invertebrate taxonomic identification, fish identification, data entry, QA/QC, Access database management, and spatial data analysis. She has conducted radio telemetry tracking surveys, operated rotary screw traps and fyke traps, conducted electrofishing surveys for special-status salmonids, performed carcass surveys, and collected and prepared adult and juvenile Chinook Salmon otoliths for isotope analysis.
Jeremy Agundes, B.A.
B.A. Environmental Studies
Phone: (916) 550-9793
West Sacramento, California
Jeremy’s experience includes collecting and analyzing physical and biological data from habitat restoration sites using snorkel and spawning surveys, invertebrate sampling, flow transect surveys, and beach seine surveys. He also has experience with invertebrate taxonomic identification, fish identification, preparation and processing of adult and juvenile Chinook Salmon otoliths for aging and isotope analysis, data QA/QC, and Access database management.
Katie Karpenko, B.S.
B.S. Biology: Ecology, Evolution and Conservation
Phone: (916) 550-9793
West Sacramento, California
Katie’s experience includes collecting data from salmonid habitat restoration sites using various techniques, including: fyke trapping, beach seining, Hess and drift sampling, flow transects, environmental data collection, and PIT tagging. She plays a key role in processing lab-based data, and specializes in invertebrate identification, data entry and Access database management. Katie has also worked on projects with GENIDAQS, collecting eDNA samples in the field and extracting DNA from tissue samples and eDNA filters in the lab.
Kyle Horvath, B.S.
B.S. Environmental Management and Protection, Natural Resource Planning
Phone: (209) 353-2234
Kyle has extensive experience collecting, analyzing, and entering physical and biological data, monitoring restoration construction activities, assisting in the fabrication of sampling equipment, and contributing to technical reports. He also has extensive experience in fish identification, monitoring, sampling, handling, tagging, and tracking techniques in California’s freshwater systems. Kyle also has experience working with construction companies during restoration projects, including permit compliance, habitat rehabilitation efforts, and wildlife monitoring.
Lindsey Belcher, B.A.S.
A.T.A. Business Administration; B.S./B.A. Marine Science/Environmental Science
Phone: (503) 850-9051
Lindsey is a highly skilled technician with extensive field experience and analytical skills, including spawner, redd, and carcasses surveys; rotary screw trap operation and maintenance; and surgical implantation of radio tags into juvenile fish. In addition, she has performed fish habitat surveys, water quality sampling, habitat modeling, restoration evaluation surveys, eDNA sampling, telemetry data coding, GIS analysis and mapping, and statistical analysis and reporting.
Shelby Burgess, B.S.
B.S. Ecology and Evolutionary Biology/Environmental Science
Phone: (206) 905-6600
Shelby has experience collecting and analyzing biological and physical data from habitat restoration projects using snorkel surveys, flow transect surveys, temperature logging, and water surface elevation. She has worked on multiple projects in Washington and Alaska and has experience quantifying fish abundance and bioenergetics modelling using fish surveys, including, electrofishing, gillnetting, trawling, underwater video, hydroacoustic monitoring, gut content analysis, and stable isotope analysis. She also has experience with invertebrate taxonomic identification, fish identification, data entry and analysis, mapping, and report writing.