Document Detail

Intersexual differences in the diving behaviour of foraging subantarctic cormorant (Phalacrocorax albiventer) and Japanese cormorant (P. filamentosus).
MedLine Citation:
PMID:  10488429     Owner:  NLM     Status:  MEDLINE    
Cormorants feed by feet-propelled diving. How cormorants optimize foraging is of a particular interest in relation to the understanding of the feeding strategies of diving birds, as well as within the debate about cormorants' impact on sustainable resources. Using microdata loggers that recorded diving depth, we investigated the foraging strategy of males and females of subantarctic cormorants, which inhabit cold regions, and of Japanese cormorants, which live in the northern temperate zone. For both species, males and females daily spent the same amount of time submerged, and apparently captured the same amount of fish. However, males dived deeper and longer, which could be explained by their 15-20% larger body mass and may minimize potential competition for food.
A Kato; Y Watanuki; P Shaughnessy; Y Le Maho; Y Naito
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Comptes rendus de l'Académie des sciences. Série III, Sciences de la vie     Volume:  322     ISSN:  0764-4469     ISO Abbreviation:  C. R. Acad. Sci. III, Sci. Vie     Publication Date:  1999 Jul 
Date Detail:
Created Date:  1999-10-21     Completed Date:  1999-10-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8503078     Medline TA:  C R Acad Sci III     Country:  FRANCE    
Other Details:
Languages:  eng     Pagination:  557-62     Citation Subset:  IM; S    
National Institute of Polar Research, Tokyo, Japan.
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MeSH Terms
Antarctic Regions
Birds / physiology*
Feeding Behavior*
Sex Characteristics
Species Specificity

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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