Foraging Patterns of Antarctic Minke Whales in McMurdo Sound, Ross Sea
Evidence indicates that Antarctic minke whales (AMWs) in the Ross Sea affect the foraging behaviour, especially diet, of sympatric Adélie penguins (ADPEs) by, we hypothesize, influencing the availability of prey they have in common, mainly crystal krill. To further investigate this interaction, we u...
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Digital Commons @ University of South Florida
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Online Access: | https://digitalcommons.usf.edu/msc_facpub/1518 https://doi.org/10.1017/S0954102020000310 |
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-2525 2023-07-30T03:57:33+02:00 Foraging Patterns of Antarctic Minke Whales in McMurdo Sound, Ross Sea Ainley, David G. Joyce, Trevor W. Saenz, Ben Pitman, Robert L. Durban, John W. Ballard, Grant Daly, Kendra Kim, Stacy 2020-01-01T08:00:00Z https://digitalcommons.usf.edu/msc_facpub/1518 https://doi.org/10.1017/S0954102020000310 unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/1518 doi:10.1017/S0954102020000310 https://doi.org/10.1017/S0954102020000310 Marine Science Faculty Publications Adélie penguin Antarctic silverfish crystal krill interspecific interactions prey depletion trophic competition Life Sciences article 2020 ftusouthflorida https://doi.org/10.1017/S0954102020000310 2023-07-13T21:03:04Z Evidence indicates that Antarctic minke whales (AMWs) in the Ross Sea affect the foraging behaviour, especially diet, of sympatric Adélie penguins (ADPEs) by, we hypothesize, influencing the availability of prey they have in common, mainly crystal krill. To further investigate this interaction, we undertook a study in McMurdo Sound during 2012–2013 and 2014–2015 using telemetry and biologging of whales and penguins, shore-based observations and quantification of the preyscape. The 3D distribution and density of prey were assessed using a remotely operated vehicle deployed along and to the interior of the fast-ice edge where AMWs and ADPEs focused their foraging. Acoustic surveys of prey and foraging behaviour of predators indicate that prey remained abundant under the fast ice, becoming successively available to air-breathing predators only as the fast ice retreated. Over both seasons, the ADPE diet included less krill and more Antarctic silverfish once AMWs became abundant, but the penguins' foraging behaviour (i.e. time spent foraging, dive depth, distance from colony) did not change. In addition, over time, krill abundance decreased in the upper water column near the ice edge, consistent with the hypothesis (and previously gathered information) that AMW and ADPE foraging contributed to an alteration of prey availability. Article in Journal/Newspaper Antarc* Antarctic Antarctic silverfish McMurdo Sound Ross Sea University of South Florida St. Petersburg: Digital USFSP Antarctic McMurdo Sound Ross Sea Antarctic Science 32 6 454 465 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Adélie penguin Antarctic silverfish crystal krill interspecific interactions prey depletion trophic competition Life Sciences |
spellingShingle |
Adélie penguin Antarctic silverfish crystal krill interspecific interactions prey depletion trophic competition Life Sciences Ainley, David G. Joyce, Trevor W. Saenz, Ben Pitman, Robert L. Durban, John W. Ballard, Grant Daly, Kendra Kim, Stacy Foraging Patterns of Antarctic Minke Whales in McMurdo Sound, Ross Sea |
topic_facet |
Adélie penguin Antarctic silverfish crystal krill interspecific interactions prey depletion trophic competition Life Sciences |
description |
Evidence indicates that Antarctic minke whales (AMWs) in the Ross Sea affect the foraging behaviour, especially diet, of sympatric Adélie penguins (ADPEs) by, we hypothesize, influencing the availability of prey they have in common, mainly crystal krill. To further investigate this interaction, we undertook a study in McMurdo Sound during 2012–2013 and 2014–2015 using telemetry and biologging of whales and penguins, shore-based observations and quantification of the preyscape. The 3D distribution and density of prey were assessed using a remotely operated vehicle deployed along and to the interior of the fast-ice edge where AMWs and ADPEs focused their foraging. Acoustic surveys of prey and foraging behaviour of predators indicate that prey remained abundant under the fast ice, becoming successively available to air-breathing predators only as the fast ice retreated. Over both seasons, the ADPE diet included less krill and more Antarctic silverfish once AMWs became abundant, but the penguins' foraging behaviour (i.e. time spent foraging, dive depth, distance from colony) did not change. In addition, over time, krill abundance decreased in the upper water column near the ice edge, consistent with the hypothesis (and previously gathered information) that AMW and ADPE foraging contributed to an alteration of prey availability. |
format |
Article in Journal/Newspaper |
author |
Ainley, David G. Joyce, Trevor W. Saenz, Ben Pitman, Robert L. Durban, John W. Ballard, Grant Daly, Kendra Kim, Stacy |
author_facet |
Ainley, David G. Joyce, Trevor W. Saenz, Ben Pitman, Robert L. Durban, John W. Ballard, Grant Daly, Kendra Kim, Stacy |
author_sort |
Ainley, David G. |
title |
Foraging Patterns of Antarctic Minke Whales in McMurdo Sound, Ross Sea |
title_short |
Foraging Patterns of Antarctic Minke Whales in McMurdo Sound, Ross Sea |
title_full |
Foraging Patterns of Antarctic Minke Whales in McMurdo Sound, Ross Sea |
title_fullStr |
Foraging Patterns of Antarctic Minke Whales in McMurdo Sound, Ross Sea |
title_full_unstemmed |
Foraging Patterns of Antarctic Minke Whales in McMurdo Sound, Ross Sea |
title_sort |
foraging patterns of antarctic minke whales in mcmurdo sound, ross sea |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2020 |
url |
https://digitalcommons.usf.edu/msc_facpub/1518 https://doi.org/10.1017/S0954102020000310 |
geographic |
Antarctic McMurdo Sound Ross Sea |
geographic_facet |
Antarctic McMurdo Sound Ross Sea |
genre |
Antarc* Antarctic Antarctic silverfish McMurdo Sound Ross Sea |
genre_facet |
Antarc* Antarctic Antarctic silverfish McMurdo Sound Ross Sea |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/1518 doi:10.1017/S0954102020000310 https://doi.org/10.1017/S0954102020000310 |
op_doi |
https://doi.org/10.1017/S0954102020000310 |
container_title |
Antarctic Science |
container_volume |
32 |
container_issue |
6 |
container_start_page |
454 |
op_container_end_page |
465 |
_version_ |
1772817963623120896 |