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 genetic...
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Universidad Autónoma de Baja California
2005
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ftdoajarticles:oai:doaj.org/article:9b5ef747a56e4952bdc63f4e51ecad2a 2024-09-15T18:15:36+00:00 Diet of California sea lions, Zalophus californianus, at San Jorge Island, northern Gulf of California, Mexico, 1998–1999 Eric Mellink Adriana Lucía Romero-Saavedra 2005-03-01T00:00:00Z https://doi.org/10.7773/cm.v31i2.57 https://doaj.org/article/9b5ef747a56e4952bdc63f4e51ecad2a EN ES eng spa Universidad Autónoma de Baja California https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/57 https://doaj.org/toc/0185-3880 https://doaj.org/toc/2395-9053 doi:10.7773/cm.v31i2.57 0185-3880 2395-9053 https://doaj.org/article/9b5ef747a56e4952bdc63f4e51ecad2a Ciencias Marinas, Vol 31, Iss 2 (2005) California sea lions Zalophus californicus diet northern Gulf of California Biology (General) QH301-705.5 article 2005 ftdoajarticles https://doi.org/10.7773/cm.v31i2.57 2024-08-05T17:49:54Z 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. Article in Journal/Newspaper Jorge Island Directory of Open Access Journals: DOAJ Articles Ciencias Marinas 31 2 369 377 |
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English Spanish |
topic |
California sea lions Zalophus californicus diet northern Gulf of California Biology (General) QH301-705.5 |
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California sea lions Zalophus californicus diet northern Gulf of California Biology (General) QH301-705.5 Eric Mellink Adriana Lucía Romero-Saavedra Diet of California sea lions, Zalophus californianus, at San Jorge Island, northern Gulf of California, Mexico, 1998–1999 |
topic_facet |
California sea lions Zalophus californicus diet northern Gulf of California Biology (General) QH301-705.5 |
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. |
format |
Article in Journal/Newspaper |
author |
Eric Mellink Adriana Lucía Romero-Saavedra |
author_facet |
Eric Mellink Adriana Lucía Romero-Saavedra |
author_sort |
Eric Mellink |
title |
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_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_sort |
diet of california sea lions, zalophus californianus, at san jorge island, northern gulf of california, mexico, 1998–1999 |
publisher |
Universidad Autónoma de Baja California |
publishDate |
2005 |
url |
https://doi.org/10.7773/cm.v31i2.57 https://doaj.org/article/9b5ef747a56e4952bdc63f4e51ecad2a |
genre |
Jorge Island |
genre_facet |
Jorge Island |
op_source |
Ciencias Marinas, Vol 31, Iss 2 (2005) |
op_relation |
https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/57 https://doaj.org/toc/0185-3880 https://doaj.org/toc/2395-9053 doi:10.7773/cm.v31i2.57 0185-3880 2395-9053 https://doaj.org/article/9b5ef747a56e4952bdc63f4e51ecad2a |
op_doi |
https://doi.org/10.7773/cm.v31i2.57 |
container_title |
Ciencias Marinas |
container_volume |
31 |
container_issue |
2 |
container_start_page |
369 |
op_container_end_page |
377 |
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1810453466906099712 |