Document Detail


Genetic structure and phylogeography of two freshwater fishes, Rhadinocentrus ornatus and Hypseleotris compressa, in southern Queensland, Australia, inferred from allozymes and mitochondrial DNA.
MedLine Citation:
PMID:  21235546     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
This study used allozyme and mtDNA variation to examine genetic structure in Rhadinocentrus ornatus and Hypseleotris compressa in southern Queensland. The aim of this study was to test the hypothesis that dispersal between coastal streams was greater in R. ornatus than in H. compressa and to test whether R. ornatus would reflect a similar pattern seen in another obligate freshwater fish in the same region, that is, R. ornatus will show genetic homogeneity among streams of the Sunshine Coast but significant differentiation among all other streams. Evidence from the current study suggests that, in R. ornatus, there was significant genetic differentiation among populations within regions, which explains why this species has very restricted dispersal abilities between streams, even between those very close to one another. On the other hand, H. compressa showed very low levels of genetic differentiation suggesting some gene flow among regions by virtue of dispersal. High levels of genetic differentiation were identified between all coastal streams in the area, including those hypothesized to have been recently connected in the Sunshine Coast area in the case of R. ornatus.
Authors:
S Sharma; J M Hughes
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of fish biology     Volume:  78     ISSN:  1095-8649     ISO Abbreviation:  J. Fish Biol.     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-01-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0214055     Medline TA:  J Fish Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  57-77     Citation Subset:  IM    
Copyright Information:
© 2011 The Authors. Journal of Fish Biology © 2011 The Fisheries Society of the British Isles.
Affiliation:
Australian Rivers Institute, Griffith University, Nathan Campus, Queensland, 4111, Australia. ssharma90@hotmail.com
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