Document Detail


Effects of river flows on growth of redbreast sunfish Lepomis auritus (Centrarchidae) in Georgia rivers.
MedLine Citation:
PMID:  20735655     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Effects of river discharge on growth of redbreast sunfish Lepomis auritus were investigated in nine rivers in Georgia, U.S.A. Fish were aged and annular total length increments (L(Tinc)) estimated from measurements from sectioned sagittal otoliths using the generalized regression model that held for the effects of decreasing L(Tinc) from annual age (X): L(Tinc)=b(o)-b(1)(X) +/-b(i)(D), where b(o), b(1) and b(i) were the regression coefficients for the intercept and slopes and D, discharge, was either a single or multiple measurements of annular or seasonal flow volume or variation in flow volume. For eight of nine rivers, higher or greater variation in flows from April to June was associated with greater L. auritus growth; in the last river, higher flows from January to March were associated with greater fish growth. Across all rivers, L. auritus growth increments were 22, 45 and 36% greater in a wet year v. a dry year at ages 1, 2 and 3 years, respectively. Based on the results of this study, increasing water withdrawals by an additional 30% in five Georgia rivers would reduce the predicted number of L. auritus recruiting to 203 mm (angler preferred size) by 19-62%.
Authors:
S M Sammons; M J Maceina
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of fish biology     Volume:  74     ISSN:  1095-8649     ISO Abbreviation:  J. Fish Biol.     Publication Date:  2009 May 
Date Detail:
Created Date:  2010-08-25     Completed Date:  2010-11-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0214055     Medline TA:  J Fish Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1580-93     Citation Subset:  IM    
Affiliation:
Department of Fisheries and Allied Aquacultures, 203 Swingle Hall, Auburn University, AL 36849, USA. sammosm@auburn.edu
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MeSH Terms
Descriptor/Qualifier:
Animals
Georgia
Models, Biological
Perciformes / growth & development*
Rivers*
Seasons
Water Movements*

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


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