Diet of California sea lions, Zalophus californianus, at San Jorge Island, northern Gulf of California, Mexico, 1998–1999
The California sea lion, Zalophus californianus (Lesson, 1828), is the only resident pinniped in the Gulf of California, the largest populations inhabiting the Midriff islands and the northern gulf. San Jorge Island, in the northern gulf, has the second largest reproductive colony, and it is geneti...
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Baja California
2005-03-01
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| Series: | Ciencias Marinas |
| Subjects: | |
| Online Access: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/57 |
| _version_ | 1797279474539036672 |
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| author | Eric Mellink Adriana Lucía Romero-Saavedra |
| author_facet | Eric Mellink Adriana Lucía Romero-Saavedra |
| author_sort | Eric Mellink |
| collection | DOAJ |
| description |
The California sea lion, Zalophus californianus (Lesson, 1828), is the only resident pinniped in the Gulf of California, the largest populations inhabiting the Midriff islands and the northern gulf. San Jorge Island, in the northern gulf, has the second largest reproductive colony, and it is genetically different from other colonies in the gulf. We studied the diet of the San Jorge sea lions through scat analysis from February 1998 to March 1999. Midshipman, Porichthys sp. (mostly darkedge midshipman, P. analis Hubbs and Schultz, 1939) was the most important prey item for sea lions at San Jorge, followed by Panama grunt, Pomadasys panamensis (Steindachner, 1875), and Panama brief squid, Lolliguncula panamensis Berry, 1911. It appears that the sea lions foraged mostly on the sea bottom. The prey consumed by sea lions at San Jorge are of no commercial interest. There was little dietary overlap between California sea lions and brown boobies, Sula leucogaster (Boddaert, 1783), the most abundant ichthyophagous bird on the island.
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| first_indexed | 2024-03-07T16:25:54Z |
| format | Article |
| id | doaj.art-9b5ef747a56e4952bdc63f4e51ecad2a |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:25:54Z |
| publishDate | 2005-03-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-9b5ef747a56e4952bdc63f4e51ecad2a2024-03-03T18:35:17ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90532005-03-0131210.7773/cm.v31i2.57Diet of California sea lions, Zalophus californianus, at San Jorge Island, northern Gulf of California, Mexico, 1998–1999Eric Mellink0Adriana Lucía Romero-Saavedra1Centro de Investigación Científica y de Educación Superior de EnsenadaCentro de Investigación Científica y de Educación Superior de Ensenada The California sea lion, Zalophus californianus (Lesson, 1828), is the only resident pinniped in the Gulf of California, the largest populations inhabiting the Midriff islands and the northern gulf. San Jorge Island, in the northern gulf, has the second largest reproductive colony, and it is genetically different from other colonies in the gulf. We studied the diet of the San Jorge sea lions through scat analysis from February 1998 to March 1999. Midshipman, Porichthys sp. (mostly darkedge midshipman, P. analis Hubbs and Schultz, 1939) was the most important prey item for sea lions at San Jorge, followed by Panama grunt, Pomadasys panamensis (Steindachner, 1875), and Panama brief squid, Lolliguncula panamensis Berry, 1911. It appears that the sea lions foraged mostly on the sea bottom. The prey consumed by sea lions at San Jorge are of no commercial interest. There was little dietary overlap between California sea lions and brown boobies, Sula leucogaster (Boddaert, 1783), the most abundant ichthyophagous bird on the island. https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/57California sea lionsZalophus californicusdietnorthern Gulf of California |
| spellingShingle | Eric Mellink Adriana Lucía Romero-Saavedra Diet of California sea lions, Zalophus californianus, at San Jorge Island, northern Gulf of California, Mexico, 1998–1999 Ciencias Marinas California sea lions Zalophus californicus diet northern Gulf of California |
| title | Diet of California sea lions, Zalophus californianus, at San Jorge Island, northern Gulf of California, Mexico, 1998–1999 |
| title_full | Diet of California sea lions, Zalophus californianus, at San Jorge Island, northern Gulf of California, Mexico, 1998–1999 |
| title_fullStr | Diet of California sea lions, Zalophus californianus, at San Jorge Island, northern Gulf of California, Mexico, 1998–1999 |
| title_full_unstemmed | Diet of California sea lions, Zalophus californianus, at San Jorge Island, northern Gulf of California, Mexico, 1998–1999 |
| title_short | Diet of California sea lions, Zalophus californianus, at San Jorge Island, northern Gulf of California, Mexico, 1998–1999 |
| title_sort | diet of california sea lions zalophus californianus at san jorge island northern gulf of california mexico 1998 1999 |
| topic | California sea lions Zalophus californicus diet northern Gulf of California |
| url | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/57 |
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