Repeated Vessel Interactions and Climate- or Fishery-Driven Changes in Prey Density Limit Energy Acquisition by Foraging Blue Whales
International audience Blue whale survival and fitness are highly contingent on successful food intake during an intense feeding season. Factors affecting time spent at the surface or at depth in a prey patch are likely to alter foraging effort, net energy gain, and fitness. We specifically examined...
Published in: | Frontiers in Marine Science |
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Online Access: | https://hal.archives-ouvertes.fr/hal-02912704 https://doi.org/10.3389/fmars.2020.00626 |
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ftunivnantes:oai:HAL:hal-02912704v1 2023-05-15T15:45:12+02:00 Repeated Vessel Interactions and Climate- or Fishery-Driven Changes in Prey Density Limit Energy Acquisition by Foraging Blue Whales Guilpin, Marie Lesage, Véronique Mcquinn, Ian, Brosset, Pablo Doniol-Valcroze, Thomas Jeanniard-Du-Dot, Tiphaine Winkler, Gesche Maurice-Lamontagne Institute Fisheries and Oceans Canada (DFO) Maurice Lamontagne Institute Pacific Biological Station (PBS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Institut des Sciences de la MER de Rimouski (ISMER) Université du Québec à Rimouski (UQAR) 2020-08-03 https://hal.archives-ouvertes.fr/hal-02912704 https://doi.org/10.3389/fmars.2020.00626 en eng HAL CCSD Frontiers Media info:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2020.00626 hal-02912704 https://hal.archives-ouvertes.fr/hal-02912704 doi:10.3389/fmars.2020.00626 ISSN: 2296-7745 Frontiers in Marine Science https://hal.archives-ouvertes.fr/hal-02912704 Frontiers in Marine Science, 2020, 7, pp.626. ⟨10.3389/fmars.2020.00626⟩ net energy gain foraging energetics krill density climate change whale-watching interaction Estuary and Gulf of St. Lawrence [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2020 ftunivnantes https://doi.org/10.3389/fmars.2020.00626 2023-01-03T23:59:37Z International audience Blue whale survival and fitness are highly contingent on successful food intake during an intense feeding season. Factors affecting time spent at the surface or at depth in a prey patch are likely to alter foraging effort, net energy gain, and fitness. We specifically examined the energetic consequences of a demonstrated reduction in dive duration caused by vessel proximity, and of krill density reductions potentially resulting from krill exploitation or climate change. We estimated net energy gain over a simulated 10-h foraging bout under baseline conditions, and three scenarios, reflecting krill density reductions, vessel interactions of different amplitudes, and their combined effects. Generally, the magnitude of the effects increased with that of krill density reductions and duration of vessel proximity. They were also smaller when peak densities were more accessible, i.e., nearer to the surface. Effect size from a reduction in krill density on net energy gain were deemed small to moderate at 5% krill reduction, moderate to large at 10% reduction, and large at 25 and 50% reductions. Vessels reduced cumulated net energy gain by as much as 25% when in proximity for 3 of a 10-h daylight foraging period, and by up to 47–85% when continuously present for 10 h. The impacts of vessel proximity on net energy gain increased with their duration. They were more important when whales were precluded from reaching the most beneficial peak densities, and when these densities were located at deeper depths. When krill densities were decreased by 5% or more, disturbing foraging blue whales for 3 h could reduce their net energy gain by ≥30%. For this endangered western North Atlantic blue whale population, a decrease in net energy gain through an altered krill preyscape or repeated vessel interactions is of particular concern, as this species relies on a relatively short feeding season to accumulate energy reserves and to fuel reproduction. This study highlights the importance of distance limits during ... Article in Journal/Newspaper Blue whale North Atlantic Université de Nantes: HAL-UNIV-NANTES Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
net energy gain foraging energetics krill density climate change whale-watching interaction Estuary and Gulf of St. Lawrence [SDE]Environmental Sciences |
spellingShingle |
net energy gain foraging energetics krill density climate change whale-watching interaction Estuary and Gulf of St. Lawrence [SDE]Environmental Sciences Guilpin, Marie Lesage, Véronique Mcquinn, Ian, Brosset, Pablo Doniol-Valcroze, Thomas Jeanniard-Du-Dot, Tiphaine Winkler, Gesche Repeated Vessel Interactions and Climate- or Fishery-Driven Changes in Prey Density Limit Energy Acquisition by Foraging Blue Whales |
topic_facet |
net energy gain foraging energetics krill density climate change whale-watching interaction Estuary and Gulf of St. Lawrence [SDE]Environmental Sciences |
description |
International audience Blue whale survival and fitness are highly contingent on successful food intake during an intense feeding season. Factors affecting time spent at the surface or at depth in a prey patch are likely to alter foraging effort, net energy gain, and fitness. We specifically examined the energetic consequences of a demonstrated reduction in dive duration caused by vessel proximity, and of krill density reductions potentially resulting from krill exploitation or climate change. We estimated net energy gain over a simulated 10-h foraging bout under baseline conditions, and three scenarios, reflecting krill density reductions, vessel interactions of different amplitudes, and their combined effects. Generally, the magnitude of the effects increased with that of krill density reductions and duration of vessel proximity. They were also smaller when peak densities were more accessible, i.e., nearer to the surface. Effect size from a reduction in krill density on net energy gain were deemed small to moderate at 5% krill reduction, moderate to large at 10% reduction, and large at 25 and 50% reductions. Vessels reduced cumulated net energy gain by as much as 25% when in proximity for 3 of a 10-h daylight foraging period, and by up to 47–85% when continuously present for 10 h. The impacts of vessel proximity on net energy gain increased with their duration. They were more important when whales were precluded from reaching the most beneficial peak densities, and when these densities were located at deeper depths. When krill densities were decreased by 5% or more, disturbing foraging blue whales for 3 h could reduce their net energy gain by ≥30%. For this endangered western North Atlantic blue whale population, a decrease in net energy gain through an altered krill preyscape or repeated vessel interactions is of particular concern, as this species relies on a relatively short feeding season to accumulate energy reserves and to fuel reproduction. This study highlights the importance of distance limits during ... |
author2 |
Maurice-Lamontagne Institute Fisheries and Oceans Canada (DFO) Maurice Lamontagne Institute Pacific Biological Station (PBS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Institut des Sciences de la MER de Rimouski (ISMER) Université du Québec à Rimouski (UQAR) |
format |
Article in Journal/Newspaper |
author |
Guilpin, Marie Lesage, Véronique Mcquinn, Ian, Brosset, Pablo Doniol-Valcroze, Thomas Jeanniard-Du-Dot, Tiphaine Winkler, Gesche |
author_facet |
Guilpin, Marie Lesage, Véronique Mcquinn, Ian, Brosset, Pablo Doniol-Valcroze, Thomas Jeanniard-Du-Dot, Tiphaine Winkler, Gesche |
author_sort |
Guilpin, Marie |
title |
Repeated Vessel Interactions and Climate- or Fishery-Driven Changes in Prey Density Limit Energy Acquisition by Foraging Blue Whales |
title_short |
Repeated Vessel Interactions and Climate- or Fishery-Driven Changes in Prey Density Limit Energy Acquisition by Foraging Blue Whales |
title_full |
Repeated Vessel Interactions and Climate- or Fishery-Driven Changes in Prey Density Limit Energy Acquisition by Foraging Blue Whales |
title_fullStr |
Repeated Vessel Interactions and Climate- or Fishery-Driven Changes in Prey Density Limit Energy Acquisition by Foraging Blue Whales |
title_full_unstemmed |
Repeated Vessel Interactions and Climate- or Fishery-Driven Changes in Prey Density Limit Energy Acquisition by Foraging Blue Whales |
title_sort |
repeated vessel interactions and climate- or fishery-driven changes in prey density limit energy acquisition by foraging blue whales |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-02912704 https://doi.org/10.3389/fmars.2020.00626 |
genre |
Blue whale North Atlantic |
genre_facet |
Blue whale North Atlantic |
op_source |
ISSN: 2296-7745 Frontiers in Marine Science https://hal.archives-ouvertes.fr/hal-02912704 Frontiers in Marine Science, 2020, 7, pp.626. ⟨10.3389/fmars.2020.00626⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2020.00626 hal-02912704 https://hal.archives-ouvertes.fr/hal-02912704 doi:10.3389/fmars.2020.00626 |
op_doi |
https://doi.org/10.3389/fmars.2020.00626 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
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1766379539593691136 |