Ontogenetic niche partitioning in southern elephant seals from Argentine Patagonia
Abstract Elephant seals, Mirounga spp., are highly dimorphic, having different energetic requirements according to age and sex, and foraging in various ecological and oceanographic contexts. Resource partitioning has been shown for the sub‐Antarctic populations of southern elephant seals, M. leonina...
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crwiley:10.1111/mms.12770 2024-09-15T17:47:46+00:00 Ontogenetic niche partitioning in southern elephant seals from Argentine Patagonia Campagna, Julieta Lewis, Mirtha N. González Carman, Victoria Campagna, Claudio Guinet, Christophe Johnson, Mark Davis, Randall W. Rodríguez, Diego H. Hindell, Mark A. 2020 http://dx.doi.org/10.1111/mms.12770 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12770 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mms.12770 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Mammal Science volume 37, issue 2, page 631-651 ISSN 0824-0469 1748-7692 journal-article 2020 crwiley https://doi.org/10.1111/mms.12770 2024-07-25T04:21:30Z Abstract Elephant seals, Mirounga spp., are highly dimorphic, having different energetic requirements according to age and sex, and foraging in various ecological and oceanographic contexts. Resource partitioning has been shown for the sub‐Antarctic populations of southern elephant seals, M. leonina , where colonies are surrounded by narrow shelves that deepen abruptly. In contrast, seals from Península Valdés (Argentina), in the northernmost extent of the breeding range, face an extended, shallow, temperate, and productive continental shelf. We integrated tracking data from 98 animals (juveniles and adults, males and females) gathered over more than two decades, and found that although all available habitats were used, individuals segregated by age and sex. Juvenile males favored shelf habitats, whereas subadult and adult males also used the shelf break. Juvenile females preferred the shelf and the more distant Argentine Basin used by postbreeding and postmolt adult females. Males showed the highest proportion of area‐restricted search locations, suggesting more spatially concentrated feeding activity, and likely reflecting a preference for foraging habitat and prey. Our results are consistent with those from other populations, implying that elephant seals show remarkable similarities in habitat use by age and sex classes, despite broad differences in the offshore habitats between sub‐Antarctic and temperate ecosystems. Article in Journal/Newspaper Antarc* Antarctic Elephant Seals Southern Elephant Seals Wiley Online Library Marine Mammal Science 37 2 631 651 |
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English |
description |
Abstract Elephant seals, Mirounga spp., are highly dimorphic, having different energetic requirements according to age and sex, and foraging in various ecological and oceanographic contexts. Resource partitioning has been shown for the sub‐Antarctic populations of southern elephant seals, M. leonina , where colonies are surrounded by narrow shelves that deepen abruptly. In contrast, seals from Península Valdés (Argentina), in the northernmost extent of the breeding range, face an extended, shallow, temperate, and productive continental shelf. We integrated tracking data from 98 animals (juveniles and adults, males and females) gathered over more than two decades, and found that although all available habitats were used, individuals segregated by age and sex. Juvenile males favored shelf habitats, whereas subadult and adult males also used the shelf break. Juvenile females preferred the shelf and the more distant Argentine Basin used by postbreeding and postmolt adult females. Males showed the highest proportion of area‐restricted search locations, suggesting more spatially concentrated feeding activity, and likely reflecting a preference for foraging habitat and prey. Our results are consistent with those from other populations, implying that elephant seals show remarkable similarities in habitat use by age and sex classes, despite broad differences in the offshore habitats between sub‐Antarctic and temperate ecosystems. |
format |
Article in Journal/Newspaper |
author |
Campagna, Julieta Lewis, Mirtha N. González Carman, Victoria Campagna, Claudio Guinet, Christophe Johnson, Mark Davis, Randall W. Rodríguez, Diego H. Hindell, Mark A. |
spellingShingle |
Campagna, Julieta Lewis, Mirtha N. González Carman, Victoria Campagna, Claudio Guinet, Christophe Johnson, Mark Davis, Randall W. Rodríguez, Diego H. Hindell, Mark A. Ontogenetic niche partitioning in southern elephant seals from Argentine Patagonia |
author_facet |
Campagna, Julieta Lewis, Mirtha N. González Carman, Victoria Campagna, Claudio Guinet, Christophe Johnson, Mark Davis, Randall W. Rodríguez, Diego H. Hindell, Mark A. |
author_sort |
Campagna, Julieta |
title |
Ontogenetic niche partitioning in southern elephant seals from Argentine Patagonia |
title_short |
Ontogenetic niche partitioning in southern elephant seals from Argentine Patagonia |
title_full |
Ontogenetic niche partitioning in southern elephant seals from Argentine Patagonia |
title_fullStr |
Ontogenetic niche partitioning in southern elephant seals from Argentine Patagonia |
title_full_unstemmed |
Ontogenetic niche partitioning in southern elephant seals from Argentine Patagonia |
title_sort |
ontogenetic niche partitioning in southern elephant seals from argentine patagonia |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/mms.12770 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12770 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mms.12770 |
genre |
Antarc* Antarctic Elephant Seals Southern Elephant Seals |
genre_facet |
Antarc* Antarctic Elephant Seals Southern Elephant Seals |
op_source |
Marine Mammal Science volume 37, issue 2, page 631-651 ISSN 0824-0469 1748-7692 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/mms.12770 |
container_title |
Marine Mammal Science |
container_volume |
37 |
container_issue |
2 |
container_start_page |
631 |
op_container_end_page |
651 |
_version_ |
1810497309044113408 |