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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.

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Skyline plots for Brazilian Ocyurus chrysurus.A. Based on the Control Region sequences (Bayesian Skyline plot). B. Extended Bayesian Skyline plot for the Brazilian Ocyurus chrysurus populations. Both are based on a mutation rate of 10% per million years (between lineages).
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pone.0122173.g003: Skyline plots for Brazilian Ocyurus chrysurus.A. Based on the Control Region sequences (Bayesian Skyline plot). B. Extended Bayesian Skyline plot for the Brazilian Ocyurus chrysurus populations. Both are based on a mutation rate of 10% per million years (between lineages).

Mentions: The Bayesian Skyline Plot (Fig. 3) indicated the historic occurrence of an increase in the effective size of the O. chrysurus populations, dated to the end of the Pleistocene. These results are consistent with a process of historical expansion of yellowtail snapper populations, as indicated by significant negative Fs values [57] and by adjusting the mismatch distributions to model population growth (Fig. 4).


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)

Skyline plots for Brazilian Ocyurus chrysurus.A. Based on the Control Region sequences (Bayesian Skyline plot). B. Extended Bayesian Skyline plot for the Brazilian Ocyurus chrysurus populations. Both are based on a mutation rate of 10% per million years (between lineages).
© Copyright Policy
Related In: Results  -  Collection

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

pone.0122173.g003: Skyline plots for Brazilian Ocyurus chrysurus.A. Based on the Control Region sequences (Bayesian Skyline plot). B. Extended Bayesian Skyline plot for the Brazilian Ocyurus chrysurus populations. Both are based on a mutation rate of 10% per million years (between lineages).
Mentions: The Bayesian Skyline Plot (Fig. 3) indicated the historic occurrence of an increase in the effective size of the O. chrysurus populations, dated to the end of the Pleistocene. These results are consistent with a process of historical expansion of yellowtail snapper populations, as indicated by significant negative Fs values [57] and by adjusting the mismatch distributions to model population growth (Fig. 4).

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