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High levels of genetic connectivity among populations of yellowtail snapper, Ocyurus chrysurus (Lutjanidae-Perciformes), in the western South Atlantic revealed through multilocus analysis.

da Silva R, Veneza I, Sampaio I, Araripe J, Schneider H, Gomes G - PLoS ONE (2015)

Bottom Line: In the present study, five loci (mitochondrial and nuclear) were sequenced to determine the genetic diversity, population structure, and demographic history of populations of the yellowtail snapper, Ocyurus chrysurus, found along the coast of the western South Atlantic.The results reflected a marked congruence between the mitochondrial and nuclear markers as well as intense gene flow among the analyzed populations, which represent a single genetic stock along the entire coast of Brazil between the states of Pará and Espírito Santo.In addition, this species is intensively exploited by commercial fisheries, and data on the genetic structure of its populations will be essential for the development of effective conservation and management plans.

View Article: PubMed Central - PubMed

Affiliation: Laboratório de Genética Aplicada, Instituto de Estudos Costeiros, Campus Bragança-Universidade Federal do Pará, Bragança, Pará, Brasil.

ABSTRACT
In the present study, five loci (mitochondrial and nuclear) were sequenced to determine the genetic diversity, population structure, and demographic history of populations of the yellowtail snapper, Ocyurus chrysurus, found along the coast of the western South Atlantic. O. chrysurus is a lutjanid species that is commonly associated with coral reefs and exhibits an ample geographic distribution, and it can therefore be considered a good model for the investigation of phylogeographic patterns and genetic connectivity in marine environments. The results reflected a marked congruence between the mitochondrial and nuclear markers as well as intense gene flow among the analyzed populations, which represent a single genetic stock along the entire coast of Brazil between the states of Pará and Espírito Santo. Our data also showed high levels of genetic diversity in the species (mainly mtDNA), as well a major historic population expansion, which most likely coincided with the sea level oscillations at the end of the Pleistocene. In addition, this species is intensively exploited by commercial fisheries, and data on the genetic structure of its populations will be essential for the development of effective conservation and management plans.

Show MeSH
Genetic relationships among haplotypes found in the Brazilian Ocyurus chrysurus populations.Estimated by the maximum parsimony method, for the sequences of the Control Region, Cytochrome b, IGF 2, GH 5, and ANT. Each haplotype is represented by a circle, and the frequency of each haplotype proportional to the scale shown. Colors refer to the origin of each sample analyzed.
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pone.0122173.g002: Genetic relationships among haplotypes found in the Brazilian Ocyurus chrysurus populations.Estimated by the maximum parsimony method, for the sequences of the Control Region, Cytochrome b, IGF 2, GH 5, and ANT. Each haplotype is represented by a circle, and the frequency of each haplotype proportional to the scale shown. Colors refer to the origin of each sample analyzed.

Mentions: The genetic homogeneity of the populations from the Brazilian coast was also emphasized by the distribution of the haplotypes, given the lack of any clear geographic pattern in the network (Fig. 2). This genetic homogeneity over a broad geographic scale was further supported by the Mantel test, which rejected the scenario of isolation by distance (IBD), although when the comparisons included Belize there was some evidence in favor of a scenario with IBD, (Mantel test; r = 0.7354, p = 0.05) (S1 Fig.). The haplotypes identified in Belize were not shared by any locality analyzed along the Brazilian coast, supporting the significance of the Mantel test.


High levels of genetic connectivity among populations of yellowtail snapper, Ocyurus chrysurus (Lutjanidae-Perciformes), in the western South Atlantic revealed through multilocus analysis.

da Silva R, Veneza I, Sampaio I, Araripe J, Schneider H, Gomes G - PLoS ONE (2015)

Genetic relationships among haplotypes found in the Brazilian Ocyurus chrysurus populations.Estimated by the maximum parsimony method, for the sequences of the Control Region, Cytochrome b, IGF 2, GH 5, and ANT. Each haplotype is represented by a circle, and the frequency of each haplotype proportional to the scale shown. Colors refer to the origin of each sample analyzed.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4359153&req=5

pone.0122173.g002: Genetic relationships among haplotypes found in the Brazilian Ocyurus chrysurus populations.Estimated by the maximum parsimony method, for the sequences of the Control Region, Cytochrome b, IGF 2, GH 5, and ANT. Each haplotype is represented by a circle, and the frequency of each haplotype proportional to the scale shown. Colors refer to the origin of each sample analyzed.
Mentions: The genetic homogeneity of the populations from the Brazilian coast was also emphasized by the distribution of the haplotypes, given the lack of any clear geographic pattern in the network (Fig. 2). This genetic homogeneity over a broad geographic scale was further supported by the Mantel test, which rejected the scenario of isolation by distance (IBD), although when the comparisons included Belize there was some evidence in favor of a scenario with IBD, (Mantel test; r = 0.7354, p = 0.05) (S1 Fig.). The haplotypes identified in Belize were not shared by any locality analyzed along the Brazilian coast, supporting the significance of the Mantel test.

Bottom Line: In the present study, five loci (mitochondrial and nuclear) were sequenced to determine the genetic diversity, population structure, and demographic history of populations of the yellowtail snapper, Ocyurus chrysurus, found along the coast of the western South Atlantic.The results reflected a marked congruence between the mitochondrial and nuclear markers as well as intense gene flow among the analyzed populations, which represent a single genetic stock along the entire coast of Brazil between the states of Pará and Espírito Santo.In addition, this species is intensively exploited by commercial fisheries, and data on the genetic structure of its populations will be essential for the development of effective conservation and management plans.

View Article: PubMed Central - PubMed

Affiliation: Laboratório de Genética Aplicada, Instituto de Estudos Costeiros, Campus Bragança-Universidade Federal do Pará, Bragança, Pará, Brasil.

ABSTRACT
In the present study, five loci (mitochondrial and nuclear) were sequenced to determine the genetic diversity, population structure, and demographic history of populations of the yellowtail snapper, Ocyurus chrysurus, found along the coast of the western South Atlantic. O. chrysurus is a lutjanid species that is commonly associated with coral reefs and exhibits an ample geographic distribution, and it can therefore be considered a good model for the investigation of phylogeographic patterns and genetic connectivity in marine environments. The results reflected a marked congruence between the mitochondrial and nuclear markers as well as intense gene flow among the analyzed populations, which represent a single genetic stock along the entire coast of Brazil between the states of Pará and Espírito Santo. Our data also showed high levels of genetic diversity in the species (mainly mtDNA), as well a major historic population expansion, which most likely coincided with the sea level oscillations at the end of the Pleistocene. In addition, this species is intensively exploited by commercial fisheries, and data on the genetic structure of its populations will be essential for the development of effective conservation and management plans.

Show MeSH