Genetic divergence among invasive and native populations of Plagioscion squamosissimus (Perciformes, Sciaenidae) in Neotropical regions

The genetic divergence among invasive and native populations of Plagioscion squamosissimus from four Neotropical hydrographic basins was assessed using the hypervariable domain of the mitochondrial DNA (mtDNA) control region. Plagioscion squamosissimus is native to the neighbouring hydrographic basi...

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Bibliographic Details
Published in:Journal of fish biology 2012-06, Vol.80 (7), p.2434-2447
Main Authors: Panarari-Antunes, R. S., Prioli, A. J., Prioli, S. M. A. P., Gomes, V. N., Júlio Jr, H. F., Agostinho, C. S., Silva Filho, J. P., Boni, T. A., Prioli, L. M.
Format: Article
Language:English
Subjects:
Animals
corvina
DNA, Mitochondrial - genetics
genetic diversity
Genetic Drift
Genetic Variation
Haplotypes
Introduced Species
mtDNA
Perciformes - classification
Perciformes - genetics
pescada
Phylogeny
Rivers
South America
Tropical Climate
upper Paraná River basin
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Summary:The genetic divergence among invasive and native populations of Plagioscion squamosissimus from four Neotropical hydrographic basins was assessed using the hypervariable domain of the mitochondrial DNA (mtDNA) control region. Plagioscion squamosissimus is native to the neighbouring hydrographic basins of the Parnaíba and Amazon Rivers, and the latter includes the Araguaia–Tocantins drainage, but it is invasive in other basins due to introductions. The mtDNA nucleotide polymorphism supported the hypothesis that the Amazon and Parnaíba populations constitute the same species and are separated into two independent evolutionary lineages. Absence of nucleotide polymorphism was observed within and among P. squamosissimus populations invasive to the uppper and middle Paraná River basins. Nucleotide divergence was null or low comparing the Paraná invasive populations with the populations native to the Parnaíba River basin, whereas it was significantly high compared to Tocantins populations. These results ascertain that P. squamosissimus populations invasive to the upper Paraná River basin and to the middle Paraná River basin downstream of the Itaipu dam are derived from the Parnaíba River basin. The genetic data presented are potentially useful to assist further studies on P. squamosissimus taxonomic and geographic distribution, development of ecological guidelines for managing populations invasive to the upper Paraná River basin and for preservation of native fish diversity.
ISSN:0022-1112
1095-8649
DOI:10.1111/j.1095-8649.2012.03290.x