Optimization of transit strategies while diving in foraging king penguins
Abstract Optimal foraging theories predict that air‐breathing, diving foragers should maximize time spent at feeding depths, and minimize time spent travelling between surface and depth (transits). The second part of this hypothesis was tested in free‐ranging king penguins A ptenodytes patagonicus u...
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crwiley:10.1111/jzo.12026 2023-12-03T10:25:23+01:00 Optimization of transit strategies while diving in foraging king penguins Hanuise, N. Bost, C.‐A. Handrich, Y. French Ministry of Research Institut Polaire Français 2013 http://dx.doi.org/10.1111/jzo.12026 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjzo.12026 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12026 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jzo.12026 https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12026 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Zoology volume 290, issue 3, page 181-191 ISSN 0952-8369 1469-7998 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2013 crwiley https://doi.org/10.1111/jzo.12026 2023-11-09T14:03:28Z Abstract Optimal foraging theories predict that air‐breathing, diving foragers should maximize time spent at feeding depths, and minimize time spent travelling between surface and depth (transits). The second part of this hypothesis was tested in free‐ranging king penguins A ptenodytes patagonicus using measurements of vertical speed, swimming speed, body angle and flipper stroke frequency during transits in relation to an index of foraging success (number of wiggles), during the bottom and the ascent phases of the dive. We found that, except for flipper stroke frequency, all measured variables increased with diving depth and foraging activity. The change in vertical speed was driven mainly by a change in body angle and a slight change in swimming speed. These results suggest a shortening of transit duration in response to increased foraging activity. Whereas the time spent commuting between the surface and foraging depths was reduced when foraging activity was high, vertical speed was only at its maximum over a small part of both ascent and descent phases of the dive. Within the first 10 m of descent, vertical speed increased with maximum dive depth and an index of foraging activity, suggesting that penguins anticipated their diving depth and foraging activity. Our results show that foraging king penguins adjust their diving behaviour in response to both diving depth and foraging activity. Further studies should consider ecological, physiological or mechanical constraints as factors that may limit foraging optimization. Article in Journal/Newspaper King Penguins Wiley Online Library (via Crossref) Journal of Zoology 290 3 181 191 |
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Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Hanuise, N. Bost, C.‐A. Handrich, Y. Optimization of transit strategies while diving in foraging king penguins |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Abstract Optimal foraging theories predict that air‐breathing, diving foragers should maximize time spent at feeding depths, and minimize time spent travelling between surface and depth (transits). The second part of this hypothesis was tested in free‐ranging king penguins A ptenodytes patagonicus using measurements of vertical speed, swimming speed, body angle and flipper stroke frequency during transits in relation to an index of foraging success (number of wiggles), during the bottom and the ascent phases of the dive. We found that, except for flipper stroke frequency, all measured variables increased with diving depth and foraging activity. The change in vertical speed was driven mainly by a change in body angle and a slight change in swimming speed. These results suggest a shortening of transit duration in response to increased foraging activity. Whereas the time spent commuting between the surface and foraging depths was reduced when foraging activity was high, vertical speed was only at its maximum over a small part of both ascent and descent phases of the dive. Within the first 10 m of descent, vertical speed increased with maximum dive depth and an index of foraging activity, suggesting that penguins anticipated their diving depth and foraging activity. Our results show that foraging king penguins adjust their diving behaviour in response to both diving depth and foraging activity. Further studies should consider ecological, physiological or mechanical constraints as factors that may limit foraging optimization. |
author2 |
French Ministry of Research Institut Polaire Français |
format |
Article in Journal/Newspaper |
author |
Hanuise, N. Bost, C.‐A. Handrich, Y. |
author_facet |
Hanuise, N. Bost, C.‐A. Handrich, Y. |
author_sort |
Hanuise, N. |
title |
Optimization of transit strategies while diving in foraging king penguins |
title_short |
Optimization of transit strategies while diving in foraging king penguins |
title_full |
Optimization of transit strategies while diving in foraging king penguins |
title_fullStr |
Optimization of transit strategies while diving in foraging king penguins |
title_full_unstemmed |
Optimization of transit strategies while diving in foraging king penguins |
title_sort |
optimization of transit strategies while diving in foraging king penguins |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1111/jzo.12026 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjzo.12026 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12026 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jzo.12026 https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12026 |
genre |
King Penguins |
genre_facet |
King Penguins |
op_source |
Journal of Zoology volume 290, issue 3, page 181-191 ISSN 0952-8369 1469-7998 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jzo.12026 |
container_title |
Journal of Zoology |
container_volume |
290 |
container_issue |
3 |
container_start_page |
181 |
op_container_end_page |
191 |
_version_ |
1784274241753972736 |