Diet diversity of Steller sea lions (Eumetopias jubatus) and their population decline in Alaska: A potential relationship

Canadian Journal of Fisheries and Aquatic Sciences

Volumn 54, Issue 6, 1997, Pages 1342-1348

  Merrick, Richard L ^a   Kathryn Chumbley, M ^a   Vernon Byrd, G ^b  

^a NOAA National Marine Mammal Laboratory   (United States)

^b Alaska Maritime National Wildlife Refuge   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

DIET; MAMMALS; POPULATION DECLINE; PREY DIVERSITY; STELLER SEA LION;

ALASKA; ALENTIAN ISLANDS; GULF OF ALASKA; USA;

CLUPEA HARENGUS; CLUPEA PALLASI; EUMETOPIAS JUBATUS; MAMMALIA; ONCORHYNCHUS; OTARIIDAE; PANTHERA LEO; PLEUROGRAMMUS MONOPTERYGIUS; POLLACHIUS VIRENS; STIZOSTEDION VITREUM; THERAGRA CHALCOGRAMMA;

EID: 0030859430     PISSN: 0706652X     EISSN: None     Source Type: Journal    
DOI: 10.1139/f97-037     Document Type: Article

References (32)

1. Alaska Sea Grant. 1993. Is it food? Addressing marine mammal and seabird declines. Workshop summary. Alaska Sea Grant Rep. 93-01. University of Alaska, Fairbanks.
2. Alverson, D.L. 1991. Commercial fisheries and the Steller sea lion (Eumetopias jubatus): the conflict arena. Fisheries Research Institute, University of Washington, Seattle.
3. Bigg, M.A.., and Olesiuk, P.P. 1990. An enclosed elutriator for processing marine mammal scats. Mar. Mammal Sci. 6: 350-355.
4. Castellini, M.A. 1993. Physiological health status of Steller sea lions and other pinnipeds in Alaskan waters: program objectives. Abstr. Tenth Bienn. Conf. Biol. Mar. Mammals, 11-15 Nov. 1993, Galveston, Tex.
5. Davis, R.W., Brandon, E.A.A., Kanatous, S., Adams, T., Brandon, D.W., Williams, T.M., Castellini, M.A., Loughlin, T.R., Calkins, D.G., and Sease, J. 1993. Female reproductive effort and pup growth in Steller sea lions. Abstr. Tenth Bienn. Conf. Biol. Mar. Mammals, 11-15 Nov. 1993, Galveston, Tex.
6. Fadely, B.S., Zaligs, J.A., and Costa, O.P. 1994. Assimilation efficiencies and maintenance requirements of California sea lions (Zalophus californianus) fed walleye pollock (Theragra chalcogramma) and herring (Clupea harengus). Final report to NMML, AFSC/NMFS, 7600 Sand Point Way NE, Seattle, WA 98115.
7. Fiscus, C.H., and Baines, O.A. 1966. Food and feeding behavior of Steller and California sea lions. J. Mammal. 47: 195-200.
8. Hare, S.R., and Francis, R.C. 1995. Climate change and salmon production in the Northeast Pacific Ocean. In Climate change and northern fish populations. Edited by R.J. Beamish. Can. Spec. Publ. Fish. Aquat. Sci. No. 121. pp. 357-372.
9. Hollowed, A.B., Wilson, C., Brown, E., and Megrey, B. 1994. Walleye pollock. In Stock assessment and fishery evaluation report for the groundfish resources of the Gulf of Alaska as projected for 1995. Gulf of Alaska Groundfish Plan Team, North Pacific Fishery Management Council, 605 W. 4th Avenue, Suite 306, Anchorage, AK 99510.
10. Loughlin, T.R., and Merrick, R.L. 1989. Comparison of commercial harvests of walleye pollock and northern sea lion abundance in the Bering Sea and Gulf of Alaska. In Proc. Int. Symp. Biol. Manage. Walleye Pollock. Alaska Sea Grant Rep. 89-1. University of Alaska, Fairbanks, pp. 679-700.
11. Lowe, S.A., and Fritz, L. 1994. Atka mackerel. In Stock assessment and fishery evaluation report for the groundfish resources of the Bering Sea and Aleutian Islands regions as projected for 1995. Bering Sea and Aleutian Islands Groundfish Plan Team, North Pacific Fishery Management Council, 605 W. 4th Avenue, Suite 306, Anchorage, AK 99510.
12. Mathisen, O.A., Baade, R.T., and Lopp, R.J. 1962. Breeding habits, growth and stomach contents of the Steller sea lion in Alaska. J. Mammal. 43: 469-477.
13. Merrick, R.L. 1995. The relationship of the foraging ecology of Steller sea lions (Eumetopias jubatus) to their population decline in Alaska. Ph.D. thesis, University of Washington, Seattle.
14. Merrick, R.L. 1996. Current and historical roles of apex predators in the Bering Sea ecosystem. J. Northwest Atlantic Fish. Sci. In press.
15. Merrick, R.L., and Calkins, D.G. 1996. Importance of juvenile walleye pollock in the diet of Gulf of Alaska Steller sea lions. In Ecology of juvenile walleye pollock (Theragra chalcogramma). Edited by R.D. Brodeur, P.A. Livingston, T.R. Loughlin, and A.B. Hollowed. U.S. Dep. Commer., NOAA Tech. Rep. NMFS 126.
16. Merrick, R.L., Loughlin, T.R., and Calkins, D.G. 1987. Decline in abundance of the northern sea lion, Eumetopias jubatus, in Alaska, 1956-86. Fish. Bull. U.S. 85: 351-365.
17. Merrick, R.L., Ferm, L.M., Everitt, R.D., Ream, R.R., and Lessard, L.A. 1991. Aerial and ship-based surveys of northern sea lions (Eumetopias jubatus) in the Gulf of Alaska and Aleutian Islands during June and July 1990. U.S. Dep. Commer. NOAA Tech. Memo. NMFS F/NWC-196.
18. Merrick, R.L., Loughlin, T.R., Antonelis, G.A., and Hill, R. 1994. Use of satellite-linked telemetry to study Steller sea lion and northern fur seal foraging. Pol. Res. 13: 105-114.
19. Merrick, R.L., Brown, R., Calkins, D.G., and Loughlin, T.R. 1995. Comparison of Steller sea lion (Eumetopias jubatus) pup masses from rookeries with decreasing and increasing populations. Fish. Bull. U.S. 93: 752-757.
20. NMFS. 1995. Status review of the United States Steller sea lion (Eumetopias jubatus) population. Prepared by NMML, AFSC, NMFS, Seattle, Wash.
21. Olesiuk, P.P., Bigg, M.A., Ellis, G.M., Crockford, S.J., and Wigen, R.J. 1990. An assessment of the feeding habits of harbour seals (Phoca vitulina) in the Strait of Georgia, British Columbia, based on scat analysis. Can. Tech. Rep. Fish. Aquat. Sci. No. 1730.
22. Pitcher, K.W. 1981. Prey of the Steller sea lion, Eumetopias jubatus, in the Gulf of Alaska. Fish. Bull. U.S. 79: 467-472.
23. Rea, L.D. 1995. Prolonged fasting in pinnipeds. Ph.D. thesis, University of Alaska, Fairbanks.
24. Rea, L.D., Castellini, M.A., and Merrick, R.L. 1993. Body condition and metabolic chemistry of Steller sea lion pups in the Aleutian Islands and Gulf of Alaska. Abstr. Tenth Bienn. Conf. Biol. Mar. Mammals, 11-15 Nov. 1993, Galveston, Tex.
25. Ricklefs, R.E. 1979. Ecology. Chiron Press, New York.
26. Spraker, T.R., Calkins, D.O., Bradley, D.J., Loughlin, T.R., and Merrick, R.L. 1993. Diseases found in Steller sea lions from the Gulf of Alaska and Bering Sea. Abstr. Tenth Bienn. Conf. Biol. Mar. Mammals, 11-15 Nov. 1993, Galveston, Tex.
27. Springer, A.M. 1992. A review: Walleye pollock in the North Pacific. How much difference do they really make? Fish. Oceanogr. 1: 80-96.
28. Strick, M., L. Fritz, Lewis, J.P., and McAllister, D.C. 1997. Aerial and ship-based surveys of Steller sea lions (Eumetopias jubatus) in Southeast Alaska, the Gulf of Alaska, and Aleutian Islands during June and July 1994. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-71.
29. Treacy, S.D., and Crawford, T.W. 1981. Retrieval of otoliths and statoliths from the gastrointestinal contents and scats of marine mammals. J. Wildl. Manage. 45: 990-993.
30. Wespestad, V.G. 1994. Walleye pollock. In Stock assessment and fishery evaluation report for the groundfish resources of the Bering Sea/Aleutian Island regions as projected for 1995. Bering Sea and Aleutian Island Plan Team, North Pacific Fishery Management Council, 605 W. 4th Avenue, Suite 306, Anchorage, AK 99510.
31. Wilderbuer, T.K., and Brown, E.S. 1992. Flatfish. In Stock assessment and fishery evaluation report for the 1993 Gulf of Alaska groundfish fishery. Gulf of Alaska Groundfish Plan Team, North Pacific Fishery Management Council, P.O. Box 103 136, Anchorage, AK 99510.
32. York, A.E., Merrick, R.L, and Loughlin, T.R. 1996. An analysis of the Steller sea lion metapopulation in Alaska. In Metapopulations and wildlife conservation. Chap. 12. Edited by D.R. McCullough Island Press, Covelo, Calif.