Document Detail


Low reproductive success in territorial male Antarctic fur seals (Arctocephalus gazella) suggests the existence of alternative mating strategies.
MedLine Citation:
PMID:  11298959     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Microsatellites were used to conduct an analysis of paternity of Antarctic fur seals (Arctocephalus gazella) from Bird Island, South Georgia. At most, only 28% of pups at our study site could be assigned a father, even though the majority (approximately 90%) of candidate males within this colony were sampled. The behavioural and genetic evidence from this study suggests that a number of alternative mating strategies may exist within this fur seal population. Holding a land-based territory conferred an advantage to male reproductive success. However, this advantage was much smaller than expected from behavioural observations. At least 70% of fur seal pups born at our study site in a given year are not fathered by males who held a territory or were observed copulating with females in the previous year, implying that there exists a pool of males that seldom venture ashore at this site. To explain this discrepancy we suggest that female choice is an integral component of the Antarctic fur seal mating system and that aquatic mating may play a much larger role in the Antarctic fur seal than previously thought.
Authors:
N J Gemmell; T M Burg; I L Boyd; W Amos
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Molecular ecology     Volume:  10     ISSN:  0962-1083     ISO Abbreviation:  Mol. Ecol.     Publication Date:  2001 Feb 
Date Detail:
Created Date:  2001-04-12     Completed Date:  2001-07-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9214478     Medline TA:  Mol Ecol     Country:  England    
Other Details:
Languages:  eng     Pagination:  451-60     Citation Subset:  IM    
Affiliation:
Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK. n.gemmell@zool.canterbury.edu
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MeSH Terms
Descriptor/Qualifier:
Animals
Antarctic Regions
Female
Fur Seals / genetics*,  physiology
Genetics, Population
Haplotypes / genetics
Male
Microsatellite Repeats / genetics*
Reproduction
Sexual Behavior, Animal / physiology*

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


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