King penguins adjust their diving behaviour with age
Increasing experience in long-lived species is fundamental to improving breeding success and ultimately individual fitness. Diving efficiency of marine animals is primarily determined by their physiological and mechanical characteristics. This efficiency may be apparent via examination of biomechani...
Published in: | Journal of Experimental Biology |
---|---|
Main Authors: | , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
Company of Biologists
2012
|
Subjects: | |
Online Access: | http://jeb.biologists.org/cgi/content/short/215/21/3685 https://doi.org/10.1242/jeb.071175 |
id |
fthighwire:oai:open-archive.highwire.org:jexbio:215/21/3685 |
---|---|
record_format |
openpolar |
spelling |
fthighwire:oai:open-archive.highwire.org:jexbio:215/21/3685 2023-05-15T17:03:54+02:00 King penguins adjust their diving behaviour with age Le Vaillant, Maryline Wilson, Rory P. Kato, Akiko Saraux, Claire Hanuise, Nicolas Prud'Homme, Onésime Le Maho, Yvon Le Bohec, Céline Ropert-Coudert, Yan 2012-11-01 00:00:00.0 text/html http://jeb.biologists.org/cgi/content/short/215/21/3685 https://doi.org/10.1242/jeb.071175 en eng Company of Biologists http://jeb.biologists.org/cgi/content/short/215/21/3685 http://dx.doi.org/10.1242/jeb.071175 Copyright (C) 2012, Company of Biologists Research Articles TEXT 2012 fthighwire https://doi.org/10.1242/jeb.071175 2013-05-26T19:09:39Z Increasing experience in long-lived species is fundamental to improving breeding success and ultimately individual fitness. Diving efficiency of marine animals is primarily determined by their physiological and mechanical characteristics. This efficiency may be apparent via examination of biomechanical performance (e.g. stroke frequency and amplitude, change in buoyancy or body angle, etc.), which itself may be modulated according to resource availability, particularly as a function of depth. We investigated how foraging and diving abilities vary with age in a long-lived seabird. During two breeding seasons, small accelerometers were deployed on young (5 year old) and older (8/9 year old) brooding king penguins ( Aptenodytes patagonicus ) at the Crozet Archipelago, Indian Ocean. We used partial dynamic body acceleration (PDBA) to quantify body movement during dive and estimate diving cost. During the initial part of the descent, older birds exerted more effort for a given speed but younger penguins worked harder in relation to performance at greater depths. Younger birds also worked harder per unit speed for virtually the whole of the ascent. We interpret these differences using a model that takes into account the upthrust and drag to which the birds are subjected during the dive. From this, we suggest that older birds inhale more at the surface but that an increase in the drag coefficient is the factor leading to the increased effort to swim at a given speed by the younger birds at greater depths. We propose that this higher drag may be the result of young birds adopting less hydrodynamic postures or less direct trajectories when swimming or even having a plumage in poorer condition. Text King Penguins HighWire Press (Stanford University) Indian Journal of Experimental Biology 215 21 3685 3692 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Research Articles |
spellingShingle |
Research Articles Le Vaillant, Maryline Wilson, Rory P. Kato, Akiko Saraux, Claire Hanuise, Nicolas Prud'Homme, Onésime Le Maho, Yvon Le Bohec, Céline Ropert-Coudert, Yan King penguins adjust their diving behaviour with age |
topic_facet |
Research Articles |
description |
Increasing experience in long-lived species is fundamental to improving breeding success and ultimately individual fitness. Diving efficiency of marine animals is primarily determined by their physiological and mechanical characteristics. This efficiency may be apparent via examination of biomechanical performance (e.g. stroke frequency and amplitude, change in buoyancy or body angle, etc.), which itself may be modulated according to resource availability, particularly as a function of depth. We investigated how foraging and diving abilities vary with age in a long-lived seabird. During two breeding seasons, small accelerometers were deployed on young (5 year old) and older (8/9 year old) brooding king penguins ( Aptenodytes patagonicus ) at the Crozet Archipelago, Indian Ocean. We used partial dynamic body acceleration (PDBA) to quantify body movement during dive and estimate diving cost. During the initial part of the descent, older birds exerted more effort for a given speed but younger penguins worked harder in relation to performance at greater depths. Younger birds also worked harder per unit speed for virtually the whole of the ascent. We interpret these differences using a model that takes into account the upthrust and drag to which the birds are subjected during the dive. From this, we suggest that older birds inhale more at the surface but that an increase in the drag coefficient is the factor leading to the increased effort to swim at a given speed by the younger birds at greater depths. We propose that this higher drag may be the result of young birds adopting less hydrodynamic postures or less direct trajectories when swimming or even having a plumage in poorer condition. |
format |
Text |
author |
Le Vaillant, Maryline Wilson, Rory P. Kato, Akiko Saraux, Claire Hanuise, Nicolas Prud'Homme, Onésime Le Maho, Yvon Le Bohec, Céline Ropert-Coudert, Yan |
author_facet |
Le Vaillant, Maryline Wilson, Rory P. Kato, Akiko Saraux, Claire Hanuise, Nicolas Prud'Homme, Onésime Le Maho, Yvon Le Bohec, Céline Ropert-Coudert, Yan |
author_sort |
Le Vaillant, Maryline |
title |
King penguins adjust their diving behaviour with age |
title_short |
King penguins adjust their diving behaviour with age |
title_full |
King penguins adjust their diving behaviour with age |
title_fullStr |
King penguins adjust their diving behaviour with age |
title_full_unstemmed |
King penguins adjust their diving behaviour with age |
title_sort |
king penguins adjust their diving behaviour with age |
publisher |
Company of Biologists |
publishDate |
2012 |
url |
http://jeb.biologists.org/cgi/content/short/215/21/3685 https://doi.org/10.1242/jeb.071175 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
King Penguins |
genre_facet |
King Penguins |
op_relation |
http://jeb.biologists.org/cgi/content/short/215/21/3685 http://dx.doi.org/10.1242/jeb.071175 |
op_rights |
Copyright (C) 2012, Company of Biologists |
op_doi |
https://doi.org/10.1242/jeb.071175 |
container_title |
Journal of Experimental Biology |
container_volume |
215 |
container_issue |
21 |
container_start_page |
3685 |
op_container_end_page |
3692 |
_version_ |
1766057894327877632 |