| King penguins adjust their diving behaviour with age. | |
| | |
MedLine Citation:
|
PMID: 23053365 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
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. |
| | |
Authors:
|
Maryline Le Vaillant; Rory P Wilson; Akiko Kato; Claire Saraux; Nicolas Hanuise; Onésime Prud'homme; Yvon Le Maho; Céline Le Bohec; Yan Ropert-Coudert |
Related Documents
:
|
23209565 - Donor age-related biological properties of human dental pulp stem cells change in nanos... 23247195 - Size-controlled synthesis of silver micro/nanowires as enabled by hcl oxidative etching. 23589635 - Diverse, continuous, and plastic sexual systems in barnacles. 23226135 - Superior recognition performance for happy masked and unmasked faces in both younger an... 18331945 - Effect of chlorhexidine varnish application on mutans streptococci counts in orthodonti... 23259025 - Recommendations of the 4th canadian consensus conference on the diagnosis and treatment... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: The Journal of experimental biology Volume: 215 ISSN: 1477-9145 ISO Abbreviation: J. Exp. Biol. Publication Date: 2012 Nov |
Date Detail:
|
Created Date: 2012-10-11 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0243705 Medline TA: J Exp Biol Country: England |
Other Details:
|
Languages: eng Pagination: 3685-92 Citation Subset: IM |
Affiliation:
|
Université de Strasbourg, Institut Pluridisciplinaire Hubert Curien, 23 rue Becquerel, 67087 Strasbourg, France. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Cervical spondylotic myelopathy caused by violent motor tics in a child with Tourette syndrome.
Next Document: The Chinese soft-shelled turtle, Pelodiscus sinensis, excretes urea mainly through the mouth instead...