Neonatal growth of Steller sea lion (Eumetopias jubatus) pups in Alaska
The growth rate of Steller sea lion (Eumetopias jubatus) pups was studied in southeast Alaska, the Gulf of Alaska, and the Aleutian Islands during the first six weeks after birth. The Steller sea lion population is currently stable in southeast Alaska but is declining in the Aleutian Islands and par...
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ftaquaticcommons:oai:generic.eprints.org:9611 2023-05-15T18:48:09+02:00 Neonatal growth of Steller sea lion (Eumetopias jubatus) pups in Alaska Brandon, Elisif A. A. Calkins, Donald G. Loughlin, Thomas R. Davis, Randall W. 2005 application/pdf http://aquaticcommons.org/9611/ http://fishbull.noaa.gov/1032/brandon.pdf http://aquaticcommons.org/9611/1/brandon.pdf en eng http://aquaticcommons.org/9611/1/brandon.pdf Brandon, Elisif A. A. and Calkins, Donald G. and Loughlin, Thomas R. and Davis, Randall W. (2005) Neonatal growth of Steller sea lion (Eumetopias jubatus) pups in Alaska. Fishery Bulletin, 103(2), pp. 246-257. Biology Ecology Fisheries Article PeerReviewed 2005 ftaquaticcommons 2020-02-27T09:23:47Z The growth rate of Steller sea lion (Eumetopias jubatus) pups was studied in southeast Alaska, the Gulf of Alaska, and the Aleutian Islands during the first six weeks after birth. The Steller sea lion population is currently stable in southeast Alaska but is declining in the Aleutian Islands and parts of the Gulf of Alaska. Male pups (22.6 kg [±2.21 SD]) were significantly heavier than female pups (19.6 kg [±1.80 SD]) at 1−5 days of age, but there were no significant differences among rookeries. Male and female pups grew (in mass, standard length, and axillary girth) at the same rate. Body mass and standard length increased at a faster rate for pups in the Aleutian Islands and the western Gulf of Alaska (0.45−0.48 kg/day and 0.47−0.53 cm/day, respectively) than in southeast Alaska (0.23 kg/day and 0.20 cm/day). Additionally, axillary girth increased at a faster rate for pups in the Aleutian Islands (0.59 cm/ day) than for pups in southeast Alaska v(0.25 cm/day). Our results indicate a greater maternal investment in male pups during gestation, but not during early lactation. Although differences in pup growth rate occurred among rookeries, there was no evidence that female sea lions and their pups were nutritionally stressed in the area of population decline Article in Journal/Newspaper Alaska Aleutian Islands International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons Gulf of Alaska |
institution |
Open Polar |
collection |
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons |
op_collection_id |
ftaquaticcommons |
language |
English |
topic |
Biology Ecology Fisheries |
spellingShingle |
Biology Ecology Fisheries Brandon, Elisif A. A. Calkins, Donald G. Loughlin, Thomas R. Davis, Randall W. Neonatal growth of Steller sea lion (Eumetopias jubatus) pups in Alaska |
topic_facet |
Biology Ecology Fisheries |
description |
The growth rate of Steller sea lion (Eumetopias jubatus) pups was studied in southeast Alaska, the Gulf of Alaska, and the Aleutian Islands during the first six weeks after birth. The Steller sea lion population is currently stable in southeast Alaska but is declining in the Aleutian Islands and parts of the Gulf of Alaska. Male pups (22.6 kg [±2.21 SD]) were significantly heavier than female pups (19.6 kg [±1.80 SD]) at 1−5 days of age, but there were no significant differences among rookeries. Male and female pups grew (in mass, standard length, and axillary girth) at the same rate. Body mass and standard length increased at a faster rate for pups in the Aleutian Islands and the western Gulf of Alaska (0.45−0.48 kg/day and 0.47−0.53 cm/day, respectively) than in southeast Alaska (0.23 kg/day and 0.20 cm/day). Additionally, axillary girth increased at a faster rate for pups in the Aleutian Islands (0.59 cm/ day) than for pups in southeast Alaska v(0.25 cm/day). Our results indicate a greater maternal investment in male pups during gestation, but not during early lactation. Although differences in pup growth rate occurred among rookeries, there was no evidence that female sea lions and their pups were nutritionally stressed in the area of population decline |
format |
Article in Journal/Newspaper |
author |
Brandon, Elisif A. A. Calkins, Donald G. Loughlin, Thomas R. Davis, Randall W. |
author_facet |
Brandon, Elisif A. A. Calkins, Donald G. Loughlin, Thomas R. Davis, Randall W. |
author_sort |
Brandon, Elisif A. A. |
title |
Neonatal growth of Steller sea lion (Eumetopias jubatus) pups in Alaska |
title_short |
Neonatal growth of Steller sea lion (Eumetopias jubatus) pups in Alaska |
title_full |
Neonatal growth of Steller sea lion (Eumetopias jubatus) pups in Alaska |
title_fullStr |
Neonatal growth of Steller sea lion (Eumetopias jubatus) pups in Alaska |
title_full_unstemmed |
Neonatal growth of Steller sea lion (Eumetopias jubatus) pups in Alaska |
title_sort |
neonatal growth of steller sea lion (eumetopias jubatus) pups in alaska |
publishDate |
2005 |
url |
http://aquaticcommons.org/9611/ http://fishbull.noaa.gov/1032/brandon.pdf http://aquaticcommons.org/9611/1/brandon.pdf |
geographic |
Gulf of Alaska |
geographic_facet |
Gulf of Alaska |
genre |
Alaska Aleutian Islands |
genre_facet |
Alaska Aleutian Islands |
op_relation |
http://aquaticcommons.org/9611/1/brandon.pdf Brandon, Elisif A. A. and Calkins, Donald G. and Loughlin, Thomas R. and Davis, Randall W. (2005) Neonatal growth of Steller sea lion (Eumetopias jubatus) pups in Alaska. Fishery Bulletin, 103(2), pp. 246-257. |
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1766240623338192896 |