Journal Title
Title of Journal: Marine Biology
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Abbravation: Marine Biology
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Publisher
Springer-Verlag
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Authors: Christin L Pruett Eric Saillant John R Gold
Publish Date: 2005/05/05
Volume: 147, Issue: 3, Pages: 593-602
Abstract
We evaluated stock structure and demographic population history of red snapper Lutjanus campechanus in the northern Gulf of Mexico Gulf via analysis of mitochondrial mtDNA sequences from 360 individuals sampled from four cohorts year classes at three localities across the northern Gulf Exact tests of genetic homogeneity and analysis of molecular variance both among cohorts within localities and among localities were nonsignificant Nested clade analysis provided evidence of different temporal episodes of both range expansion and restricted gene flow due to isolation by distance A mismatch distribution of pairwise differences among mtDNA haplotypes and a maximumlikelihood coalescence analysis indicated a population expansion phase that dated to the Pleistocene and probably represents recolonization of the continental shelf following glacial retreat The spatial distribution of red snapper in the northern Gulf appears to have a complex history that likely reflects glacial advance/retreat habitat availability and suitability and hydrology Habitat availability/suitability and hydrology may partially restrict gene flow among presentday red snapper in the northern Gulf and give rise to a metapopulation structure with variable demographic connectivity This type of population structure may be difficult to detect with commonly used selectively neutral genetic markersWork was supported in part by an award from the Gulf and South Atlantic Fisheries Development Foundation Project 700420000/11824 the National Marine Fisheries Service Marfin Project 87FF0426 and the Texas Agricultural Experiment Station Project H6703 Views expressed in the paper are those of the authors and do not necessarily reflect views of the sponsors This paper is no 40 in the series ‘Genetic Studies in Marine Fishes’ and contribution no 130 of the Center for Biosystematics and Biodiversity at Texas AM University
Keywords:
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