2015
DOI: 10.1590/1982-0224-20150037
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Abstract: The genetic diversity of the specimens of four natural populations of Arapaima from Araguaia-Tocantins basin was assessed within and among these stocks, using five primers for ISSR. COI (cytochrome c oxidase subunit I) partial sequences confirmed that the specimens belongs to Arapaima gigas. The ISSR provided 168 loci, of which 165 were polymorphic. However, the number of loci for each population and expected heterozygosity values were low. AMOVA showed 52.63% intra-population variation and 47.37% inter-popula… Show more

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Cited by 17 publications
(27 citation statements)
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“…The structuring observed in the Tocantins-Araguaia basin, which has only a single lineage, and the high Fst values recorded in the extremes of this basin are consistent with previous studies in this region, which indicate low levels of gene flow and structuring in the resident populations (Vitorino et al 2015(Vitorino et al , 2017. Historical population bottlenecks, followed by genetic drift may have further reinforced this structuring.…”
Section: Discussionsupporting
confidence: 90%
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“…The structuring observed in the Tocantins-Araguaia basin, which has only a single lineage, and the high Fst values recorded in the extremes of this basin are consistent with previous studies in this region, which indicate low levels of gene flow and structuring in the resident populations (Vitorino et al 2015(Vitorino et al , 2017. Historical population bottlenecks, followed by genetic drift may have further reinforced this structuring.…”
Section: Discussionsupporting
confidence: 90%
“…The hypothesis that the genetic divergence between arapaimas is derived primarily from the geographic isolation of populations has been refuted progressively (Araripe et al 2013, Fazzi-Gomes et al 2017a, Vitorino et al 2017. The factors most frequently associated with this structuring are historical reductions in stocks (Araripe et al 2013, Vitorino et al 2015, the sedentary behavior of the species (Araripe et al 2013, Vitorino et al 2015, Fazzi-Gomes et al 2017a, the impact of fisheries on stocks (Hrbek et al 2005, Vitorino et al 2015, and the characteristics of each basin and its floodplain dynamics (Vitorino et al 2015, Watson et al 2016. It does seem likely that these processes may have influenced the structuring of the arapaima populations over time, molding their connectivity and restricting gene flow between the different hydrographic basins.…”
Section: Discussionmentioning
confidence: 99%
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“…Previous studies on the population genetic diversity of A. gigas with molecular markers generally pointed to the absence of genetic structuring in the Am and lower To‐Ar basins, and a more pronounced structuring in the upper To‐Ar. These previous analyses, however, focused on few mtDNA sequences (Hrbek et al ), nuclear markers associated with repetitive regions (Hrbek et al , Vitorino et al , , Farias et al ), and randomly distributed genotypes along the genome (Torati et al ). Here, we sampled specimens in the field and deposited vouchers for both wild populations and fish farms, obtaining SNP markers with DArTSeq (Kilian et al ).…”
Section: Introductionmentioning
confidence: 99%