Horizontal niche partitioning of humpback and fin whales around the West Antarctic Peninsula: evidence from a concurrent whale and krill survey
A dedicated aerial cetacean survey was conducted concurrently to a standardised net trawl survey for krill in order to investigate distribution patterns of large whales and different krill species and to investigate relationships of these. Distance sampling data were used to produce density surface...
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2016
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ftopenagrar:oai:www.openagrar.de:timport_mods_00016335 2024-09-15T17:45:21+00:00 Horizontal niche partitioning of humpback and fin whales around the West Antarctic Peninsula: evidence from a concurrent whale and krill survey Herr, Helena Viquerat, Sacha Siegel, Volker Kock, Karl-Hermann Dorschel, Boris Huneke, Wilma G. Bracher, Astrid Schröder, Michael Gutt, Julian 2016 19 https://doi.org/10.1007/s00300-016-1927-9 https://www.openagrar.de/receive/timport_mods_00016335 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00016335/dn056623.pdf eng eng Polar Biology -- Polar Biol -- 0722-4060 -- 1432-2056 -- 584850-7 -- 1478942-5 -- http://link.springer.com/journal/300 -- http://www.bibliothek.uni-regensburg.de/ezeit/?1478942 https://doi.org/DOI:10.1007/s00300-016-1927-9 https://www.openagrar.de/receive/timport_mods_00016335 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00016335/dn056623.pdf only signed in user info:eu-repo/semantics/restrictedAccess article Text aerial cetasean survey distance sampling krill survey Southern Ocean Euphausia superba Thysanoessa macrura article Text doc-type:article 2016 ftopenagrar https://doi.org/10.1007/s00300-016-1927-9 2024-07-08T23:56:24Z A dedicated aerial cetacean survey was conducted concurrently to a standardised net trawl survey for krill in order to investigate distribution patterns of large whales and different krill species and to investigate relationships of these. Distance sampling data were used to produce density surface models for humpback (Megaptera novaeangliae) and fin whales (Balaenoptera physalus) around the West Antarctic Peninsula (WAP). Abundance for both species was estimated over two strata in the Bransfield Strait and Drake Passage. Distinct distribution patterns suggest horizontal niche partitioning of the two whale species around the WAP, with fin whales aggregating at the shelf edge of the South Shetland Islands in the Drake Passage and humpback whales in the Bransfield Strait. Krill biomass estimated from the concurrent krill survey was used along with CTD data from the same expedition, bathymetric parameters and satellite data on chlorophyll-a and ice concentration to model krill distribution. Comparisons of the predicted distributions of both whale species with the predicted distributions of Euphausia superba, Euphausia crystallorophias and Thysanoessa macrura suggest a complex relationship rather than a straightforward correlation between krill and whales. However, results indicate that fin whales were feeding in an area dominated by T. macrura, while humpback whales were found in areas of higher E. superba biomass. Our results provide abundance estimates for humpback whales and, for the first time, fin whales in the WAP and contribute important information on feeding ecology and habitat use of these two species in the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Balaenoptera physalus Bransfield Strait Drake Passage Euphausia superba Megaptera novaeangliae Polar Biology South Shetland Islands Southern Ocean Thysanoessa macrura OpenAgrar (OA) Polar Biology 39 5 799 818 |
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Open Polar |
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English |
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article Text aerial cetasean survey distance sampling krill survey Southern Ocean Euphausia superba Thysanoessa macrura |
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article Text aerial cetasean survey distance sampling krill survey Southern Ocean Euphausia superba Thysanoessa macrura Herr, Helena Viquerat, Sacha Siegel, Volker Kock, Karl-Hermann Dorschel, Boris Huneke, Wilma G. Bracher, Astrid Schröder, Michael Gutt, Julian Horizontal niche partitioning of humpback and fin whales around the West Antarctic Peninsula: evidence from a concurrent whale and krill survey |
topic_facet |
article Text aerial cetasean survey distance sampling krill survey Southern Ocean Euphausia superba Thysanoessa macrura |
description |
A dedicated aerial cetacean survey was conducted concurrently to a standardised net trawl survey for krill in order to investigate distribution patterns of large whales and different krill species and to investigate relationships of these. Distance sampling data were used to produce density surface models for humpback (Megaptera novaeangliae) and fin whales (Balaenoptera physalus) around the West Antarctic Peninsula (WAP). Abundance for both species was estimated over two strata in the Bransfield Strait and Drake Passage. Distinct distribution patterns suggest horizontal niche partitioning of the two whale species around the WAP, with fin whales aggregating at the shelf edge of the South Shetland Islands in the Drake Passage and humpback whales in the Bransfield Strait. Krill biomass estimated from the concurrent krill survey was used along with CTD data from the same expedition, bathymetric parameters and satellite data on chlorophyll-a and ice concentration to model krill distribution. Comparisons of the predicted distributions of both whale species with the predicted distributions of Euphausia superba, Euphausia crystallorophias and Thysanoessa macrura suggest a complex relationship rather than a straightforward correlation between krill and whales. However, results indicate that fin whales were feeding in an area dominated by T. macrura, while humpback whales were found in areas of higher E. superba biomass. Our results provide abundance estimates for humpback whales and, for the first time, fin whales in the WAP and contribute important information on feeding ecology and habitat use of these two species in the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Herr, Helena Viquerat, Sacha Siegel, Volker Kock, Karl-Hermann Dorschel, Boris Huneke, Wilma G. Bracher, Astrid Schröder, Michael Gutt, Julian |
author_facet |
Herr, Helena Viquerat, Sacha Siegel, Volker Kock, Karl-Hermann Dorschel, Boris Huneke, Wilma G. Bracher, Astrid Schröder, Michael Gutt, Julian |
author_sort |
Herr, Helena |
title |
Horizontal niche partitioning of humpback and fin whales around the West Antarctic Peninsula: evidence from a concurrent whale and krill survey |
title_short |
Horizontal niche partitioning of humpback and fin whales around the West Antarctic Peninsula: evidence from a concurrent whale and krill survey |
title_full |
Horizontal niche partitioning of humpback and fin whales around the West Antarctic Peninsula: evidence from a concurrent whale and krill survey |
title_fullStr |
Horizontal niche partitioning of humpback and fin whales around the West Antarctic Peninsula: evidence from a concurrent whale and krill survey |
title_full_unstemmed |
Horizontal niche partitioning of humpback and fin whales around the West Antarctic Peninsula: evidence from a concurrent whale and krill survey |
title_sort |
horizontal niche partitioning of humpback and fin whales around the west antarctic peninsula: evidence from a concurrent whale and krill survey |
publishDate |
2016 |
url |
https://doi.org/10.1007/s00300-016-1927-9 https://www.openagrar.de/receive/timport_mods_00016335 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00016335/dn056623.pdf |
genre |
Antarc* Antarctic Antarctic Peninsula Balaenoptera physalus Bransfield Strait Drake Passage Euphausia superba Megaptera novaeangliae Polar Biology South Shetland Islands Southern Ocean Thysanoessa macrura |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Balaenoptera physalus Bransfield Strait Drake Passage Euphausia superba Megaptera novaeangliae Polar Biology South Shetland Islands Southern Ocean Thysanoessa macrura |
op_relation |
Polar Biology -- Polar Biol -- 0722-4060 -- 1432-2056 -- 584850-7 -- 1478942-5 -- http://link.springer.com/journal/300 -- http://www.bibliothek.uni-regensburg.de/ezeit/?1478942 https://doi.org/DOI:10.1007/s00300-016-1927-9 https://www.openagrar.de/receive/timport_mods_00016335 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00016335/dn056623.pdf |
op_rights |
only signed in user info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00300-016-1927-9 |
container_title |
Polar Biology |
container_volume |
39 |
container_issue |
5 |
container_start_page |
799 |
op_container_end_page |
818 |
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1810493143045373952 |