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Title: The most important fishery resource in the amazon, the migratory catfish brachyplatystoma vaillantii (Siluriformes: Pimelodidae), is composed by an unique and genetically diverse population in the solimões-amazonas river system
Other Titles: O recurso pesqueiro mais importante da amazônia, o bagre migratório brachyplatystoma vaillantii (Siluriformes: Pimelodidae), é composto por uma população única e geneticamente diversa no sistema fluvial solimões-amazonas.
Authors: Formiga, Kyara
Batista., Jacqueline S.
Alves-Gomes, J. A.
Keywords: Control region
Fishery resources
Population genetics
Issue Date: 2021
metadata.dc.publisher.journal: Neotropical Ichthyology
metadata.dc.relation.ispartof: Volume 19; Number 200082
Abstract: The migratory catfish Brachyplatystoma vaillantii is one of the most important fishery resources in the Amazon. Intense capture occurs associated to its life cycle. In order to know the genetic status, we sequenced the mitochondrial DNA control region from 150 individuals of B. vaillantii, collected in five fishing landing locations, covering the length of the Solimões-Amazonas River in Brazil. Genetic diversity parameters suggest there is no genetic differentiation between the five localities. Population’s expansion indicated by R2 and Fu’s Fs tests was also confirmed by the high number of unique haplotypes found. The Analyses of molecular variance indicated that nearly all variability was contained within locations (99.86%), and estimates of gene flow among B. vaillantii were high (FST = 0.0014). These results suggest that Brachyplatystoma vaillantii forms a panmitic population along the Solimões-Amazonas River and, has greater genetic variability than other species of the Brachyplatystoma genus available so far. Although the influence of different tributaries on B. vaillantii migration patterns remains uncertain, a single population in the main channel should be consider in future policies for management of this resource. However, since the species’ life cycle uses habitats in several countries, its management and conservation depend greatly of internationally joined efforts. © 2021, Sociedade Brasileira de Ictiologia. All rights reserved.
metadata.dc.identifier.doi: 10.1590/1982-0224-2020-0082
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