Document Detail


The breeding biology of lemon sharks at a tropical nursery lagoon.
MedLine Citation:
PMID:  12204125     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Surprisingly little is known about the reproductive behaviour and breeding biology of most shark species, especially in natural populations. Here, we characterize reproductive patterns and use of a natal nursery at Bimini, Bahamas by lemon sharks, Negaprion brevirostris. We systematically and exhaustively sampled young lemon sharks at Bimini annually from 1995 to 2000 and opportunistically sampled adults over the same period. Out of the 897 young sharks sampled, 119 could be assigned to five sampled mothers using microsatellite genotyping. Reproductive females showed strong philopatry to the nursery, returning to Bimini every two years to give birth. Each of these females may rely entirely on the Bimini nursery for recruitment. The protection of known nursery grounds should therefore figure prominently in conservation efforts for large coastal shark species. The reconstruction of paternal genotypes indicates that litters are sired by multiple males, and females mate with different males nearly every breeding cycle. The ubiquitous polyandry reported here raises the possibility that genetic incompatibility and post-copulatory paternity-biasing mechanisms may operate in viviparous sharks.
Authors:
Kevin A Feldheim; Samuel H Gruber; Mary V Ashley
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  269     ISSN:  0962-8452     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2002 Aug 
Date Detail:
Created Date:  2002-09-02     Completed Date:  2003-02-21     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  1655-61     Citation Subset:  IM    
Affiliation:
Department of Biological Sciences, University of Illinois at Chicago, 845 West Taylor Street, 60607, USA.
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MeSH Terms
Descriptor/Qualifier:
Animals
Animals, Newborn
Bahamas
Female
Genetic Variation
Genotype
Male
Microsatellite Repeats
Pregnancy
Reproduction*
Sexual Behavior, Animal
Sharks / genetics,  physiology*
Tropical Climate*
Comments/Corrections

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


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