Garcfa-Rodrfquez and Aurioles-Gamboa: Spatial and temporal variation in the diet of Zalophus californianus 



61 



1 13 p. Universidad Nacional Autonoma de Mexico. Mexico, 

 D.F. 



Bowen, W. D. 



2000. Reconstruction of pinniped diets: accounting for com- 

 plete digestion of otoliths and cephalopod beaks. Can. J. 

 Fish. Aquat. Sci. 57:898-905. 



Castro-Aguirre. J. L„ E. F. Balart, and J. Arvizu-Martinez. 



1995. Contribucibn al conocimiento del origen y distribution 

 de la ictiofauna del Golfo de California, Mexico. Hidro- 

 biolbgica 5(1-21:57-78. 



Clarke, M. R. 



1962. The identification of cephalopod "beaks" and the rela- 

 tionship between beak size and total body weight. Bull. 

 British Museum (Natural History) Zoology 8( 101:419-480. 



Cortes, E. 



1997. A critical review of methods of studying fish feeding 

 based on analysis of stomach contents: application to elas- 

 mobranch fishes. Can. J. Fish. Aquat. Sci. 54:726-738. 



Da Silva, J., and J. D. Neilson. 



1985. Limitations of using otoliths recovered in scats to 



estimate prey consumptions in seals. Can. J. Fish. Aquat. 



Sci. 42:1439-1442. 

 Duran-Lizarraga. M. E. 



1998. Caracterizacibn de los patrones de buceos de alimen- 

 tation de lobo marino Zalophus californianus y su relacibn 

 con variables ambientales en la Bahia de La Paz, B.C.S. 

 Tesis de Maestria, 82 p. CICIMAR, La Paz, B.C.S., Mexico. 



Ehrhardt, N. M. 



1991. Potential impact of a seasonal migratory jumbo squid 

 (Dosidicus gigas) stock on a Gulf of California sardine 

 (Sardinops sagax caerulea) population. Bull. Mar. Sci. 

 49(1-21:325-332. 

 Fitch, J. E. 



1966. Additional fish remains, mostly otoliths, from a Pleis- 

 tocene deposit at Playa del Rey, California. Los Angeles 

 County Mus., Cont. in Sci. (1191:1-16. 

 Fitch, J. E., and R. L. Brownell. 



1968. Fish otoliths in Cetacean stomachs and their impor- 

 tance in interpreting feeding habits. J. Fish. Res. Board 

 Canada. 25(121:2561-2574. 

 Fritz, E. S. 



1974. Total diet comparison in fishes by Spearman rank cor- 

 relation coefficients. Copeia (19741:210-214. 

 Garcia-Rodriguez, F. J. 



1995. Ecologia alimentaria del lobo marino de California, 

 Zalophus californianus californianus en Los Islotes, 

 B.C.S., Mexico. Tesis de Licenciatura, 106 p. Univer- 

 sidad Autonoma de Baja California Sur. La Paz, B.C.S. , 

 Mexico. 

 1999. Cambios espaciales y estacionales en la estructura tro- 

 fica del lobo marino de California, Zalophus caliornianus, en 

 la region de la grande islas, Golfo de California. Tesis de 

 Maestria, 73 p. CICIMAR. La Paz, B.C.S, Mexico. 

 Hawes, D. 



1983. An evaluation of California sea lion scat samples as 

 indicators of prey importance. Master's thesis, 50 p. San 

 Francisco State Univ., San Francisco, CA. 

 Hoffman, M. 



1978. The use of Pielou's method to determine sample size 

 in food studies. In Fish food habits studies: proceedings 

 of the second Pacific Northwest technical workshop (S. J. 

 Lipovsky and C. A. Simenstad, eds.), p 56-61. Washington 

 Sea Grant Publication, Seattle, WA. 

 Hurtubia, J. 



1973. Trophic diversity measurement in sympatric preda- 

 tory species. Ecology 54(41:885-890. 



Jobling, M. 



1987. Marine mammal faeces samples as indicators of prey 

 importance — a source of error in bioenergetics studies. 

 Sarsia 72:255-260. 

 Jobling, M., and A. Breiby. 



1986. The use and abuse of fish otoliths in studies of feeding 

 habits of marine piscivores. Sarsia 71:265-274. 

 Kooyman, G L., and F. Trillmich. 



1986a. Diving behavior of Galapagos fur seals. In Fur 

 seals: maternal strategies on land and at sea (R. L. Gentry 

 and G. L. Kooyman, eds), p. 186-195. Princeton Univ. 

 Press, New Jersey, NJ. 

 1986b. Diving behavior of Galapagos sea lions. In Fur 

 seals — maternal strategies on land and at sea (R. L. 

 Gentry and G. L. Kooyman, eds. 1, p. 209-220. Princeton 

 LIniv. Press, Princeton. NJ. 

 Lowry, M. S., and J. V. Carretta. 



1999. Market squid (Loligo opalescens) in the diet of 

 California sea lions (Zalophus californianus) in southern 

 California ( 1981-1995). Calif. Coop. Oceanic Fish. Invest. 

 Rep. 40:196-207. 

 Lowry, M. S„ C. W. Oliver, C. Macky, and J. B. Wexler. 



1990. Food habits of California sea lions Zalophus califor- 

 nianus at San Clemente Island, California, 1981-86. Fish. 

 Bull. 88:509-521. 



Lowry, M. S., B. S. Stewart, C. B. Heath, P. K. Yochem. 

 and J. M. Francis. 



1991. Seasonal and annual variability in the diet of Cali- 

 fornia sea lions Zalophus californianus at San Nicolas 

 Island, California, 1981-86. Fish. Bull. 89:331-336. 



Ludwig, J. A., and J. F Reynolds. 



1988. Statistical ecology: a primer on methods and comput- 

 ing. 338 p. John Wiley and Sons, New York, NY. 

 Magurran, A. E. 



1988. Ecological diversity and its measurement, 178 p. 

 Princeton Univ. Press, Princeton, NJ. 

 Melin, S. R., and R. L. DeLong. 



1999. At-sea distribution and diving behavior of California 

 sea lion females from San Miguel Island, California. In 

 Proceeding of the fifth California islands symposium (D. R. 

 Browne, K. L. Mitchell, and H. W. Chaney, eds.), p. 407-402. 

 Santa Barbara Museum of Natural History, Santa Barbara, 

 CA. 

 Murie, D. J., and D. M. Lavigne. 



1985. A technique to recovery of otoliths from stomach 

 contents of piscivorous pinnipeds. J. Wildl. Manag. 49: 

 910-912. 

 Nolf, D. 



1993. A survey of perciform otoliths and their interest for 

 phylogenetic analysis, with an iconographic synopsis of the 

 Percoidei. Bull. Mar. Sci. 52(1 ):220-239. 

 Olesiuk, P. F. 



1993. Annual prey consumption by harbor seals (Phoca 

 vitulina ) in the Strait of Georgia, British Columbia. Fish. 

 Bull. 91:491-515. 

 Orta-Davila, F. 



1988. Habitos alimentarios y censos globales del lobo marino 

 (Zalophus californianus) en el Islote El Racito, Bahia de 

 las Animas, Baja California. Mexico durante octubre 

 1986-1987. Tesis de Licenciatura, 59 p. Universidad 

 Autonoma de Baja California. Ensenada, B.C. 

 Pitcher, K. W. 



1980. Stomach contents and feces as indicators of harbour 

 seal, Phoca vitulina, foods in the Gulf of Alaska. Fish. 

 Bull. 78:797-798. 



