Leave or stay? Video-logger revealed foraging efficiency of humpback whales under temporal change in prey density
Publisher's version (útgefin grein) Central place foraging theory (CPF) has been used to predict the optimal patch residence time for air-breathing marine predators in response to patch quality. Humpback whales (Megaptera novaeangliae) forage on densely aggregated prey, which may induce drastic...
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Online Access: | https://hdl.handle.net/20.500.11815/1031 https://doi.org/10.1371/journal.pone.0211138 |
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ftopinvisindi:oai:opinvisindi.is:20.500.11815/1031 2023-05-15T17:10:52+02:00 Leave or stay? Video-logger revealed foraging efficiency of humpback whales under temporal change in prey density Akiyama, Yu Akamatsu, Tomonari Rasmussen, Marianne Iversen, Maria R. Iwata, Takashi Goto, Yusuke Aoki, Kagari Sato, Katsufumi Rannsóknasetur á Húsavík (HÍ) Research Centre in Húsavík (UI) Háskóli Íslands University of Iceland 2019-02-05 e0211138 https://hdl.handle.net/20.500.11815/1031 https://doi.org/10.1371/journal.pone.0211138 en eng Public Library of Science (PLoS) Plos One;14(2) Akiyama Y, Akamatsu T, Rasmussen MH, Iversen MR, Iwata T, Goto Y, et al. (2019) Leave or stay? Video-logger revealed foraging efficiency of humpback whales under temporal change in prey density. PLoS ONE 14(2): e0211138. https://doi. org/10.1371/journal.pone.0211138 1932-6203 https://hdl.handle.net/20.500.11815/1031 Plos One doi:10.1371/journal.pone.0211138 info:eu-repo/semantics/openAccess Humpback whales Foraging Predation Whales Acceleration Accelerometers Animal behavior Oxygen Hvalir Hnúfubakur Fæðuöflun dýra Rándýr info:eu-repo/semantics/article 2019 ftopinvisindi https://doi.org/20.500.11815/1031 https://doi.org/10.1371/journal.pone.0211138 2022-11-18T06:51:43Z Publisher's version (útgefin grein) Central place foraging theory (CPF) has been used to predict the optimal patch residence time for air-breathing marine predators in response to patch quality. Humpback whales (Megaptera novaeangliae) forage on densely aggregated prey, which may induce drastic change in prey density in a single feeding event. Thus, the decision whether to leave or stay after each feeding event in a single dive in response to this drastic change, should have a significant effect on prey exploitation efficiency. However, whether humpback whales show adaptive behavior in response to the diminishing prey density in a single dive has been technically difficult to test. Here, we studied the foraging behavior of humpback whales in response to change in prey density in a single dive and calculated the efficiency of each foraging dive using a model based on CPF approach. Using animal-borne accelerometers and video loggers attached to whales, foraging behavior and change in relative prey density in front of the whales were successfully quantified. Results showed diminishing rate of energy intake in consecutive feeding events, and humpback whales efficiently fed by bringing the rate of energy intake close to maximum in a single dive cycle. This video-based method also enabled us to detect the presence of other animals around the tagged whales, showing an interesting trend in behavioral changes where feeding duration was shorter when other animals were present. Our results have introduced a new potential to quantitatively investigate the effect of other animals on free-ranging top predators in the context of optimal foraging theory. Peer Reviewed Article in Journal/Newspaper Megaptera novaeangliae Opin vísindi (Iceland) PLOS ONE 14 2 e0211138 |
institution |
Open Polar |
collection |
Opin vísindi (Iceland) |
op_collection_id |
ftopinvisindi |
language |
English |
topic |
Humpback whales Foraging Predation Whales Acceleration Accelerometers Animal behavior Oxygen Hvalir Hnúfubakur Fæðuöflun dýra Rándýr |
spellingShingle |
Humpback whales Foraging Predation Whales Acceleration Accelerometers Animal behavior Oxygen Hvalir Hnúfubakur Fæðuöflun dýra Rándýr Akiyama, Yu Akamatsu, Tomonari Rasmussen, Marianne Iversen, Maria R. Iwata, Takashi Goto, Yusuke Aoki, Kagari Sato, Katsufumi Leave or stay? Video-logger revealed foraging efficiency of humpback whales under temporal change in prey density |
topic_facet |
Humpback whales Foraging Predation Whales Acceleration Accelerometers Animal behavior Oxygen Hvalir Hnúfubakur Fæðuöflun dýra Rándýr |
description |
Publisher's version (útgefin grein) Central place foraging theory (CPF) has been used to predict the optimal patch residence time for air-breathing marine predators in response to patch quality. Humpback whales (Megaptera novaeangliae) forage on densely aggregated prey, which may induce drastic change in prey density in a single feeding event. Thus, the decision whether to leave or stay after each feeding event in a single dive in response to this drastic change, should have a significant effect on prey exploitation efficiency. However, whether humpback whales show adaptive behavior in response to the diminishing prey density in a single dive has been technically difficult to test. Here, we studied the foraging behavior of humpback whales in response to change in prey density in a single dive and calculated the efficiency of each foraging dive using a model based on CPF approach. Using animal-borne accelerometers and video loggers attached to whales, foraging behavior and change in relative prey density in front of the whales were successfully quantified. Results showed diminishing rate of energy intake in consecutive feeding events, and humpback whales efficiently fed by bringing the rate of energy intake close to maximum in a single dive cycle. This video-based method also enabled us to detect the presence of other animals around the tagged whales, showing an interesting trend in behavioral changes where feeding duration was shorter when other animals were present. Our results have introduced a new potential to quantitatively investigate the effect of other animals on free-ranging top predators in the context of optimal foraging theory. Peer Reviewed |
author2 |
Rannsóknasetur á Húsavík (HÍ) Research Centre in Húsavík (UI) Háskóli Íslands University of Iceland |
format |
Article in Journal/Newspaper |
author |
Akiyama, Yu Akamatsu, Tomonari Rasmussen, Marianne Iversen, Maria R. Iwata, Takashi Goto, Yusuke Aoki, Kagari Sato, Katsufumi |
author_facet |
Akiyama, Yu Akamatsu, Tomonari Rasmussen, Marianne Iversen, Maria R. Iwata, Takashi Goto, Yusuke Aoki, Kagari Sato, Katsufumi |
author_sort |
Akiyama, Yu |
title |
Leave or stay? Video-logger revealed foraging efficiency of humpback whales under temporal change in prey density |
title_short |
Leave or stay? Video-logger revealed foraging efficiency of humpback whales under temporal change in prey density |
title_full |
Leave or stay? Video-logger revealed foraging efficiency of humpback whales under temporal change in prey density |
title_fullStr |
Leave or stay? Video-logger revealed foraging efficiency of humpback whales under temporal change in prey density |
title_full_unstemmed |
Leave or stay? Video-logger revealed foraging efficiency of humpback whales under temporal change in prey density |
title_sort |
leave or stay? video-logger revealed foraging efficiency of humpback whales under temporal change in prey density |
publisher |
Public Library of Science (PLoS) |
publishDate |
2019 |
url |
https://hdl.handle.net/20.500.11815/1031 https://doi.org/10.1371/journal.pone.0211138 |
genre |
Megaptera novaeangliae |
genre_facet |
Megaptera novaeangliae |
op_relation |
Plos One;14(2) Akiyama Y, Akamatsu T, Rasmussen MH, Iversen MR, Iwata T, Goto Y, et al. (2019) Leave or stay? Video-logger revealed foraging efficiency of humpback whales under temporal change in prey density. PLoS ONE 14(2): e0211138. https://doi. org/10.1371/journal.pone.0211138 1932-6203 https://hdl.handle.net/20.500.11815/1031 Plos One doi:10.1371/journal.pone.0211138 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/20.500.11815/1031 https://doi.org/10.1371/journal.pone.0211138 |
container_title |
PLOS ONE |
container_volume |
14 |
container_issue |
2 |
container_start_page |
e0211138 |
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1766067523666575360 |