Trophic niche partitioning and diet composition of sympatric fin ( Balaenoptera physalus) and humpback whales ( Megaptera novaeangliae) in the Gulf of Alaska revealed through stable isotope analysis
Abstract Fin and humpback whales are large consumers that are often sympatric, effectively sharing or partitioning their use of habitat and prey resources. Stable carbon and nitrogen isotopes in the skin of fin and humpback whales from two regions in the western Gulf of Alaska, Kodiak, and Shumagin...
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crwiley:10.1111/mms.12333 2024-09-09T19:31:41+00:00 Trophic niche partitioning and diet composition of sympatric fin ( Balaenoptera physalus) and humpback whales ( Megaptera novaeangliae) in the Gulf of Alaska revealed through stable isotope analysis Witteveen, Briana H. Wynne, Kate M. National Oceanic and Atmospheric Administration 2016 http://dx.doi.org/10.1111/mms.12333 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmms.12333 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12333 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Mammal Science volume 32, issue 4, page 1319-1339 ISSN 0824-0469 1748-7692 journal-article 2016 crwiley https://doi.org/10.1111/mms.12333 2024-06-25T04:18:04Z Abstract Fin and humpback whales are large consumers that are often sympatric, effectively sharing or partitioning their use of habitat and prey resources. Stable carbon and nitrogen isotopes in the skin of fin and humpback whales from two regions in the western Gulf of Alaska, Kodiak, and Shumagin Islands, were analyzed to test the hypothesis that these sympatric baleen whales exhibit trophic niche partitioning within these regions. Standard ellipse areas, estimated using Bayesian inference, suggested that niche partitioning between species is occurring in the Kodiak region but not in the Shumagin Islands. Isotopic mixing models based on stable isotopes from whales and local prey samples, were used to estimate possible diet solutions for whales in the Kodiak region. Comparison of isotopic niches and diet models support niche partitioning, with fin whales foraging primarily on zooplankton and humpback whales foraging on zooplankton and small forage fish. The results of this study show that niche partitioning between sympatric species can vary by region and may be the result of prey availability, prey preferences, or both. Article in Journal/Newspaper Balaenoptera physalus baleen whales Kodiak Megaptera novaeangliae Alaska Wiley Online Library Gulf of Alaska Marine Mammal Science 32 4 1319 1339 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Fin and humpback whales are large consumers that are often sympatric, effectively sharing or partitioning their use of habitat and prey resources. Stable carbon and nitrogen isotopes in the skin of fin and humpback whales from two regions in the western Gulf of Alaska, Kodiak, and Shumagin Islands, were analyzed to test the hypothesis that these sympatric baleen whales exhibit trophic niche partitioning within these regions. Standard ellipse areas, estimated using Bayesian inference, suggested that niche partitioning between species is occurring in the Kodiak region but not in the Shumagin Islands. Isotopic mixing models based on stable isotopes from whales and local prey samples, were used to estimate possible diet solutions for whales in the Kodiak region. Comparison of isotopic niches and diet models support niche partitioning, with fin whales foraging primarily on zooplankton and humpback whales foraging on zooplankton and small forage fish. The results of this study show that niche partitioning between sympatric species can vary by region and may be the result of prey availability, prey preferences, or both. |
author2 |
National Oceanic and Atmospheric Administration |
format |
Article in Journal/Newspaper |
author |
Witteveen, Briana H. Wynne, Kate M. |
spellingShingle |
Witteveen, Briana H. Wynne, Kate M. Trophic niche partitioning and diet composition of sympatric fin ( Balaenoptera physalus) and humpback whales ( Megaptera novaeangliae) in the Gulf of Alaska revealed through stable isotope analysis |
author_facet |
Witteveen, Briana H. Wynne, Kate M. |
author_sort |
Witteveen, Briana H. |
title |
Trophic niche partitioning and diet composition of sympatric fin ( Balaenoptera physalus) and humpback whales ( Megaptera novaeangliae) in the Gulf of Alaska revealed through stable isotope analysis |
title_short |
Trophic niche partitioning and diet composition of sympatric fin ( Balaenoptera physalus) and humpback whales ( Megaptera novaeangliae) in the Gulf of Alaska revealed through stable isotope analysis |
title_full |
Trophic niche partitioning and diet composition of sympatric fin ( Balaenoptera physalus) and humpback whales ( Megaptera novaeangliae) in the Gulf of Alaska revealed through stable isotope analysis |
title_fullStr |
Trophic niche partitioning and diet composition of sympatric fin ( Balaenoptera physalus) and humpback whales ( Megaptera novaeangliae) in the Gulf of Alaska revealed through stable isotope analysis |
title_full_unstemmed |
Trophic niche partitioning and diet composition of sympatric fin ( Balaenoptera physalus) and humpback whales ( Megaptera novaeangliae) in the Gulf of Alaska revealed through stable isotope analysis |
title_sort |
trophic niche partitioning and diet composition of sympatric fin ( balaenoptera physalus) and humpback whales ( megaptera novaeangliae) in the gulf of alaska revealed through stable isotope analysis |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/mms.12333 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmms.12333 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12333 |
geographic |
Gulf of Alaska |
geographic_facet |
Gulf of Alaska |
genre |
Balaenoptera physalus baleen whales Kodiak Megaptera novaeangliae Alaska |
genre_facet |
Balaenoptera physalus baleen whales Kodiak Megaptera novaeangliae Alaska |
op_source |
Marine Mammal Science volume 32, issue 4, page 1319-1339 ISSN 0824-0469 1748-7692 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/mms.12333 |
container_title |
Marine Mammal Science |
container_volume |
32 |
container_issue |
4 |
container_start_page |
1319 |
op_container_end_page |
1339 |
_version_ |
1809900534225698816 |