- Division of Environmental Services
- Office of Water Quality
- Environmental Water Quality and Estuarine Studies Branch
- Aquatic Ecology Section
- Bay-Delta Monitoring and Analysis Section
- Environmental Real Time Monitoring and Support Section
- Special Studies Research Section
- Interagency Ecological Program
Contact UsKaren Gehrts, Chief
Environmental Water Quality and Estuarine Studies Branch
3500 Industrial Blvd
West Sacramento, CA 95691
Phone: (916) 376-9694
Staff Environmental Scientist
PhD, Animal Biology (Fish Behavior & Watershed Sciences)
MS, Natural Science at San Jose State University (Fisheries & Bilingual Science Ed)
BS, Biology from UC Santa Cruz (Marine)
Anadromous fish behavior, their migration patterns, habitat use by life stage and Predator-Prey habitat overlap interactions using telemetry, DIDSON (Dual-frequency IDentification SOnar), and other technologies. She is the co-lead of the Biotelemetry Project Work Team.
Developing anesthesia standards and surgical techniques for wild fishes being implanted with acoustic transmitters teaming with aquatic veterinarians from UC Davis, NOAA, and the Monterey Bay Aquarium. Designing and implementing large scale telemetry studies which are scientific, meet animal welfare concerns, and defensible in the Court.
Factors that limit anadromous larval and juvenile fish survival which utilize the Delta-Upper SF Estuary as a nursery during their life cycle. The effects of water export and landscape characteristics influence watershed, estuarine, and ocean dynamics and these habitat parameters result in juvenile anadromous fish migration across multiple spatial-temporal scales now and in the future concerning climate change.
Currently, she is analyzing the spatiotemporal migratory patterns and habitat use of the 99 juvenile striped bass that she surgically implanted with VEMCO V-9s during the summer of 2010. The transmitters expired in October 2011 and initial results show that some juvenile striped bass display strong site fidelity while others do not which may indicate differences in migration between sexes and maturity. These fish also show strong seasonal preferences for warmer (>60F) and higher saline (10 ppt). Maps showing seasonal distribution are planned to be posted in March 2012.
Recent Products and Results:
- LeDoux-Bloom, C.M. 2012. Session Chair: Using Biotelemetry to access survival and behavior of fishes. Bay-Delta Science Conference. October 2012
- LeDoux-Bloom, C.M., M.L. Johnson, S.I. Doroshov, and J.J. Isely. 2012. Seasonal distribution and habitat usage of juvenile striped bass in the San Francisco Estuary Watershed. Bay-Delta Science Conference. October 2012 presentation
- Wrege, B. M., C.M. LeDoux-Bloom, M.L. Johnson, S.I. Doroshov, and J.J. Isely. 2012. Movement patterns of sub-adult striped bass in the San Francisco Estuary Watershed. Bay-Delta Science Conference. October 2012 poster
- LeDoux-Bloom, Cynthia. 2012. Session Chair: Utilizing Telemetry Studies to Guide Restoration Planning, Monitoring, and Evaluation. 30th Annual Salmonid Restoration Conference April 2012
- LeDoux-Bloom, Cynthia and Jennifer E. Hemmert. 2012. Using Acoustic Telemetry to Identify Predator Habitat and Route Selection of Sub-Adult Striped Bass in the San Francisco Estuary Watershed. 30th Annual Salmonid Restoration Conference April 2012
- Caro, T., J. Darwin, T. Forrester, C. LeDoux-Bloom, and C. Wells. 2012. Conservation in the Anthropocene. Conservation Biology, Volume 26, No. 1, 185–188, Society for Conservation Biology. DOI: 10.1111/j.1523-1739.2011.01752.x
- LeDoux-Bloom, Cynthia. 2011. Migratory Behavior of Sub-Adult Striped Bass and some factors that may trigger movement through the San Francisco Estuary. 141st Annual Meeting American Fisheries Society Seattle, WA September 2011- Invited
- LeDoux-Bloom, Cynthia, Michelle Rub, Theresa “Marty” Liedtke, Niels Jepsen, Mary Moser, and Scott Weber. 2011. Workshop: Surgical procedures for implanting transmitters in Fishes: Best practices, transmitter effects, and lessons learned. 141st Annual Meeting American Fisheries Society Seattle, WA September 2011-Invited
- LeDoux-Bloom, Cynthia, Ted Sommer, and A. Peter Klimley. 2011. Seasonal Migration Patterns of Sub-Adult Striped Bass of the San Francisco Estuary. 45th Annual American Fisheries Society Cal-Neva Conference March 2011
- LeDoux-Bloom, Cynthia, Sommer, Ted, and Johnson, Michael L., 2010, Suture assessment and surgical recovery of sub-adult striped bass implanted with acoustic transmitters Poster Paper presented at the 2010 IEP Workshop on May 25, 2010 at California State University, Sacramento, Sacramento, CA.
- LeDoux-Bloom, Cynthia, Sommer, Ted, and Johnson, Michael L., 2010. Effects of suture material on growth, incision healing, and inflammation in sub-adult striped bass implanted with acoustic transmitters. Delta Science Council Conference, Sacramento, CA. September 2010
- LeDoux-Bloom, Cynthia. 2005.Determining limiting factors and wild juvenile salmonid distribution using General Random Tessellation Sampling (GRTS) in Outlet Creek, Eel River Watershed, Mendocino County, California. 23rd Annual Salmonid Restoration Conference and the 39th Annual American Fisheries Society Cal-Neva Conference March 2005
- LeDoux-Bloom, Cynthia, M.S. Fuller, and D.R. Morse. 2004. Potential sediment sites for restoration and habitat limiting factors of juvenile coho in the Gualala River Watershed, Mendocino County, California. American Fisheries Society, 38th Annual Conference of the Cal-Neva and Humboldt Chapters, Redding, CA.