Feeding tactics of resident Bryde's whales in New Zealand
Large predators typically feed on proportionally sized prey but the world's largest animals, baleen whales, bulk feed on plankton and small fishes. While most baleen whales migrate to feed on polar aggregations of nutritious zooplankton prey, Bryde's whales (Balaenoptera edeni brydei and B...
Published in: | Marine Mammal Science |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/be2d3076-22ad-4ead-a609-107f40ee5653 2023-05-15T15:37:06+02:00 Feeding tactics of resident Bryde's whales in New Zealand Izadi, Sahar Aguilar de Soto, Natacha Constantine, Rochelle Johnson, Mark 2022-07 https://pure.au.dk/portal/da/publications/feeding-tactics-of-resident-brydes-whales-in-new-zealand(be2d3076-22ad-4ead-a609-107f40ee5653).html https://doi.org/10.1111/mms.12918 http://www.scopus.com/inward/record.url?scp=85125089990&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Izadi , S , Aguilar de Soto , N , Constantine , R & Johnson , M 2022 , ' Feeding tactics of resident Bryde's whales in New Zealand ' , Marine Mammal Science , vol. 38 , no. 3 , pp. 1104-1117 . https://doi.org/10.1111/mms.12918 Balaenoptera edeni brydei biologging Bryde's whale diet plasticity DTAG feeding behavior article 2022 ftuniaarhuspubl https://doi.org/10.1111/mms.12918 2022-11-30T23:56:58Z Large predators typically feed on proportionally sized prey but the world's largest animals, baleen whales, bulk feed on plankton and small fishes. While most baleen whales migrate to feed on polar aggregations of nutritious zooplankton prey, Bryde's whales (Balaenoptera edeni brydei and B. e. edeni) inhabit less productive warm-temperate waters with variable prey abundance and quality. Off New Zealand, Bryde's whales target both fish and zooplankton, some with lower calorific value. We use multisensor tags (n = 4) and visual observations from drones and boats (n = 52) to reveal that Bryde's whales employ specialized feeding tactics matched to prey type. Zooplankton-feeding at the surface involved multiple head-slaps that presumably aggregate zooplankton followed by a side-lunge. Whales exploiting plankton patches swam in tight circles, performing up to 33 lunges (M = 5.5 ± 6.1) per feeding bout. In contrast, whales targeting fish performed faster vertical lunges. With both prey types, whales concluded lunges with a ~90° roll probably to minimize prey escape at the surface. The diet plasticity and dynamic behaviors of Bryde's whales are key to increasing their foraging efficiency. This may be essential for the whales to meet energetic demands year-round with a variety of prey in New Zealand waters. Article in Journal/Newspaper baleen whales Aarhus University: Research New Zealand Marine Mammal Science 38 3 1104 1117 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Balaenoptera edeni brydei biologging Bryde's whale diet plasticity DTAG feeding behavior |
spellingShingle |
Balaenoptera edeni brydei biologging Bryde's whale diet plasticity DTAG feeding behavior Izadi, Sahar Aguilar de Soto, Natacha Constantine, Rochelle Johnson, Mark Feeding tactics of resident Bryde's whales in New Zealand |
topic_facet |
Balaenoptera edeni brydei biologging Bryde's whale diet plasticity DTAG feeding behavior |
description |
Large predators typically feed on proportionally sized prey but the world's largest animals, baleen whales, bulk feed on plankton and small fishes. While most baleen whales migrate to feed on polar aggregations of nutritious zooplankton prey, Bryde's whales (Balaenoptera edeni brydei and B. e. edeni) inhabit less productive warm-temperate waters with variable prey abundance and quality. Off New Zealand, Bryde's whales target both fish and zooplankton, some with lower calorific value. We use multisensor tags (n = 4) and visual observations from drones and boats (n = 52) to reveal that Bryde's whales employ specialized feeding tactics matched to prey type. Zooplankton-feeding at the surface involved multiple head-slaps that presumably aggregate zooplankton followed by a side-lunge. Whales exploiting plankton patches swam in tight circles, performing up to 33 lunges (M = 5.5 ± 6.1) per feeding bout. In contrast, whales targeting fish performed faster vertical lunges. With both prey types, whales concluded lunges with a ~90° roll probably to minimize prey escape at the surface. The diet plasticity and dynamic behaviors of Bryde's whales are key to increasing their foraging efficiency. This may be essential for the whales to meet energetic demands year-round with a variety of prey in New Zealand waters. |
format |
Article in Journal/Newspaper |
author |
Izadi, Sahar Aguilar de Soto, Natacha Constantine, Rochelle Johnson, Mark |
author_facet |
Izadi, Sahar Aguilar de Soto, Natacha Constantine, Rochelle Johnson, Mark |
author_sort |
Izadi, Sahar |
title |
Feeding tactics of resident Bryde's whales in New Zealand |
title_short |
Feeding tactics of resident Bryde's whales in New Zealand |
title_full |
Feeding tactics of resident Bryde's whales in New Zealand |
title_fullStr |
Feeding tactics of resident Bryde's whales in New Zealand |
title_full_unstemmed |
Feeding tactics of resident Bryde's whales in New Zealand |
title_sort |
feeding tactics of resident bryde's whales in new zealand |
publishDate |
2022 |
url |
https://pure.au.dk/portal/da/publications/feeding-tactics-of-resident-brydes-whales-in-new-zealand(be2d3076-22ad-4ead-a609-107f40ee5653).html https://doi.org/10.1111/mms.12918 http://www.scopus.com/inward/record.url?scp=85125089990&partnerID=8YFLogxK |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
baleen whales |
genre_facet |
baleen whales |
op_source |
Izadi , S , Aguilar de Soto , N , Constantine , R & Johnson , M 2022 , ' Feeding tactics of resident Bryde's whales in New Zealand ' , Marine Mammal Science , vol. 38 , no. 3 , pp. 1104-1117 . https://doi.org/10.1111/mms.12918 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/mms.12918 |
container_title |
Marine Mammal Science |
container_volume |
38 |
container_issue |
3 |
container_start_page |
1104 |
op_container_end_page |
1117 |
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1766367561859989504 |