Dive depth frequency of 23 adult male southern elephant seals (Mirounga leonina) from Marion Island and King George Island
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| Auteurs principaux: | , , , , , |
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2012
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| _version_ | 1867167668473167872 |
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| author | James, Bridget C McIntyre, Trevor Tosh, Cheryl Ann Bornemann, Horst Plötz, Joachim Bester, Marthán Nieuwoudt |
| author_facet | James, Bridget C McIntyre, Trevor Tosh, Cheryl Ann Bornemann, Horst Plötz, Joachim Bester, Marthán Nieuwoudt |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Access to different environments may lead to inter-population behavioural changes within a species that allow populations to exploit their immediate environments. Elephant seals from Marion Island (MI) and King George Island (KGI) (Isla 25 de Mayo) forage in different oceanic environments and evidently employ different foraging strategies. This study elucidates some of the factors influencing the diving behaviour of male southern elephant seals from these populations tracked between 1999 and 2002. Mixed-effects models were used to determine the influence of bathymetry, population of origin, body length (as a proxy for size) and individual variation on the diving behaviour of adult male elephant seals from the two populations. Males from KGI and MI showed differences in all dive parameters. MI males dived deeper and longer (median: 652.0 m and 34.00 min) than KGI males (median: 359.1 m and 25.50 min). KGI males appeared to forage both benthically and pelagically while MI males in this study rarely reached depths close to the seafloor and appeared to forage pelagically. Model outputs indicate that males from the two populations showed substantial differences in their dive depths, even when foraging in areas of similar water depth. Whereas dive depths were not significantly influenced by the size of the animals, size played a significant role in dive durations, though this was also influenced by the population that elephant seals originated from. This study provides some support for inter-population differences in dive behaviour of male southern elephant seals. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_785852 |
| institution | PANGAEA |
| language | en |
| publishDate | 2012 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Dive depth frequency of 23 adult male southern elephant seals (Mirounga leonina) from Marion Island and King George Island James, Bridget C McIntyre, Trevor Tosh, Cheryl Ann Bornemann, Horst Plötz, Joachim Bester, Marthán Nieuwoudt Marine Mammal Tracking; MMT Access to different environments may lead to inter-population behavioural changes within a species that allow populations to exploit their immediate environments. Elephant seals from Marion Island (MI) and King George Island (KGI) (Isla 25 de Mayo) forage in different oceanic environments and evidently employ different foraging strategies. This study elucidates some of the factors influencing the diving behaviour of male southern elephant seals from these populations tracked between 1999 and 2002. Mixed-effects models were used to determine the influence of bathymetry, population of origin, body length (as a proxy for size) and individual variation on the diving behaviour of adult male elephant seals from the two populations. Males from KGI and MI showed differences in all dive parameters. MI males dived deeper and longer (median: 652.0 m and 34.00 min) than KGI males (median: 359.1 m and 25.50 min). KGI males appeared to forage both benthically and pelagically while MI males in this study rarely reached depths close to the seafloor and appeared to forage pelagically. Model outputs indicate that males from the two populations showed substantial differences in their dive depths, even when foraging in areas of similar water depth. Whereas dive depths were not significantly influenced by the size of the animals, size played a significant role in dive durations, though this was also influenced by the population that elephant seals originated from. This study provides some support for inter-population differences in dive behaviour of male southern elephant seals. |
| title | Dive depth frequency of 23 adult male southern elephant seals (Mirounga leonina) from Marion Island and King George Island |
| topic | Marine Mammal Tracking; MMT |
| url | https://doi.org/10.1594/PANGAEA.785852 |