The California Current Ecosystems Program conducts research on the status and trends of marine mammals in Washington, Oregon, and California. The research projects focus on estimation of abundance and demographic parameters and the factors that regulate population growth such as disease and environmental changes. Studies of movements, behavior and foraging ecology also provide insight into the role marine mammals play in the California Current Ecosystem as the populations recover from historical exploitation.
Program Leader: Robert Delong
Recent Reports, Publications, and Posters
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The Dynamics of Hookworm Disease in Northern Fur Seals
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San Miguel Island Field Work
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Washington Gray Whale Surveys
- HERNÁNDEZ-CAMACHO, C. J., D. AURIOLES-GAMBOA, J. LAAKE, and L. R. GERBER.
2008. Survival rates of the California sea lion, Zalophus californianus, in Mexico. J. Mammal. 89:1059-1066.
- TAYLOR, M. K., J. LAAKE, P. D. McLOUGHLIN, H. D. CLUFF, and F. MESSIER.
2008. Mark-recapture and stochastic population models for polar bears of the high Arctic. Arctic 61:143-152.
- LAAKE, J., M. J. DAWSON, and J. HONE.
2008. Visibility bias in aerial survey: Mark–recapture, line-transect or both? Wildl. Res. 35:299-309.
- LAAKE, J., R. J. GUENZEL, J. L. BENGTSON, P. BOVENG, M. CAMERON, and M. B. HANSON.
2008. Coping with variation in aerial survey protocol for line-transect sampling. Wildl. Res. 35:289-299.
- TAYLOR, M. K., J. LAAKE, P. D. McLOUGHLIN, H. D. CLUFF, E. W. BORN, A. ROSING-ASVID, and F. MESSIER.
2008. Population parameters and harvest risks for polar bears (Ursus maritimus) of Kane Basin, Canada and Greenland. Polar Biol. 31(4):491-499.
- DeLONG, R. L., S. MELIN, B. S. STEWART, and R. D. HILL.
2007. Documenting elephant seal movement with a geographic location, time-depth recording archival tag, p. 38. In P. Sheridan, J. W. Ferguson, and S. L. Dowling (editors), Report of the National Marine Fisheries Service Workshop on Advancing Electronic Tag Technologies and Their Use in Stock Assessments. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-F/SPO-82.
- ROBERT L. DeLONG.
2007. The Dynamics of Hookworm Disease in Northern Fur Seals. AFSC Quarterly Report Feature (April-May-June 2007) 5 p. (.pdf, 209KB). Online.
- MELIN, S. R., A. J. ORR, and R. L. DeLONG.
2007. The status of the northern fur seal population at San Miguel Island, California, 2004 and 2005, p. 40-53. In J. W. Testa (editor), Fur seal investigations, 2004-2005. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-174.
- Additional recent California Current Ecosystems Program publications
- Program Distance: Recent Developments in Analysis and Design Capabilities for Cetacean Population Estimation
By: L. THOMAS, D. L. BORCHERS, S. T. BUCKLAND, J. L. LAAKE, E. REXSTAD
Conference: International Biometric Conference (24th), Dublin, Ireland, July 2008
(2008 poster, .pdf, 985KB) Online.
- Double-Observer Line Transect Methods: Levels of Independence
By: STEPHEN T. BUCKLAND, JEFFREY L. LAAKE, DAVID L. BORCHERS
Conference: Biology of Marine Mammals 17th Biennial Conf., Society for Marine Mammalogy, Cape Town, South Africa, Nov/Dec 2007
(2007 poster, .pdf, 1.03MB) Online.
- Examining the Ontogeny of Foraging Behaviors of the California Sea Lion (Zalophus californianus) Using Stable Isotope Analysis
By: ANTHONY J. ORR, SETH D. NEWSOME, GLENN R. VanBLARICOM, ROBERT L. DeLONG
Conference: Washington Cooperative Fish and Wildlife Research Unit Annual Cooperators Meeting, Seattle, WA, May 2006
(2006 poster, .pdf, 3.09MB) Online.
- Ontogeny of Diving Behaviors of Immature California Sea Lions (Zalophus californianus)
By: ANTHONY J. ORR, ROBERT L. DeLONG, GLENN R. VanBLARICOM, MILES L. LOGSDON
Conference: Biology of Marine Mammals 16th Biennial Conf., Society for Marine Mammalogy, San Diego, CA, Dec 2005
(2005 poster, .pdf, 180KB) Online.
- Abundance and Ecological Distribution of Antarctic Pack Ice Seals in the Pacific Sector of the Southern Ocean
By: P. L. BOVENG, J. L. BENGTSON, J. L. LAAKE, M. F. CAMERON
Conference: Biology of Marine Mammals 16th Biennial Conf., Society for Marine Mammalogy, San Diego, CA, Dec 2005
(2005 poster, .pdf, 5.42MB) Online.
- Seasonal Foraging Behavior of Lactating California Sea Lions From San Miguel Island, California
By: SHARON R. MELIN, ROBERT L. DeLONG
Conference: Lowell Wakefield Fisheries Symposium (22nd), Sea Lions of the World..., Anchorage, AK, Sept/Oct 2004
(2004 poster, .pdf, 129KB) Online.
- Ontogeny of Foraging Behavior of the Immature California Sea Lion (Zalophus californianus): Spatial Patterns & Oceanographic Variables
By: ANTHONY J. ORR, ROBERT L. DeLONG, MILES L. LOGSDON, GLENN R. VanBLARICOM
Conference: Lowell Wakefield Fisheries Symposium (22nd), Sea Lions of the World..., Anchorage, AK, Sept/Oct 2004
(2004 poster, .pdf, 6.6MB) Online.
- Additional recent California Current Ecosystems Program poster presentations