Diet of California sea lions, Zalophus californianus, at San Jorge Island, northern Gulf of California, Mexico, 1998–1999

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...

Descrizione completa

Salvato in:
Dettagli Bibliografici
Autori principali: Mellink, E, Romero-Saavedra, AL
Natura: Online
Lingua:eng
Pubblicazione: Iniversidad Autónoma de Baja California 2005
Accesso online:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/57
Tags: Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne! !
id oai:cienciasmarinas.com.mx:article-57
record_format ojs
spelling oai:cienciasmarinas.com.mx:article-572019-04-24T19:35:19Z Diet of California sea lions, Zalophus californianus, at San Jorge Island, northern Gulf of California, Mexico, 1998–1999 Dieta del lobo marino de California, Zalophus californianus Lesson, 1828), en la Isla San Jorge, en el norte del Golfo de California, México, 1998–1999 Mellink, E Romero-Saavedra, AL California sea lions Zalophus californicus diet northern Gulf of California lobo marino Zalophus californianus dieta Golfo de California norte 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. El lobo marino de California, Zalophus californianus (Lesson, 1828), es el único pinnípedo residente en el Golfo de California, donde sus mayores poblaciones están en el cinturón de las Grandes Islas y en el norte del golfo. La Isla San Jorge, en el golfo norte, tiene la segunda colonia reproductiva, que también es genéticamente diferente de otras colonias del Golfo (Schramm-Urrutia, 2002). Se estudió la dieta de los lobos marinos de esta isla por medio del análisis de excretas, entre febrero de 1998 y marzo de 1999. El componente más importante de la dieta fue Porichthys sp. (principalmente P. analis Hubbs y Schultz, 1939), seguido de Pomadasys panamensis (Steindachner, 1875) y el calamar Lolliguncula panamensis Berry, 1911. Aparentemente, los lobos forrajearon principalmente en el fondo del mar. Las presas consumidas por los lobos marinos en la Isla San Jorge no son de valor comercial. Hubo poco traslapo en las dietas entre los lobos marinos y el bobo café, Sula leucogaster (Boddaert, 1783), el ave ictiófaga mas abundante en la isla. Iniversidad Autónoma de Baja California 2005-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/57 10.7773/cm.v31i2.57 Ciencias Marinas; Vol. 31 No. 2 (2005); 369-377 Ciencias Marinas; Vol. 31 Núm. 2 (2005); 369-377 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/57/39
institution Ciencias Marinas
collection OJS
language eng
format Online
author Mellink, E
Romero-Saavedra, AL
spellingShingle Mellink, E
Romero-Saavedra, AL
Diet of California sea lions, Zalophus californianus, at San Jorge Island, northern Gulf of California, Mexico, 1998–1999
author_facet Mellink, E
Romero-Saavedra, AL
author_sort Mellink, E
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
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.
publisher Iniversidad Autónoma de Baja California
publishDate 2005
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/57
_version_ 1715723929271664640

Documenti analoghi