Genetic diversity and structuring in the arapaima (Osteoglossiformes, Osteoglossidae) population reveal differences between the Amazon and the Tocantins-Araguaia basins
Título del documento: Genetic diversity and structuring in the arapaima (Osteoglossiformes, Osteoglossidae) population reveal differences between the Amazon and the Tocantins-Araguaia basins
Revista: Anais da Academia Brasileira de Ciencias
Base de datos: PERIÓDICA
Número de sistema: 000436248
ISSN: 0001-3765
Autores: 1
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Instituciones: 1Universidade Federal do Para, Instituto de Estudos Costeiros, Braganca, Para. Brasil
2Instituto de Desenvolvimento Sustentavel Mamiraua, Tefe, Amazonas. Brasil
3Universidade Federal de Mato Grosso, Instituto de Biociencias, Cuiaba, Mato Grosso. Brasil
4Empresa Brasileira de Pesquisa Agropecuaria, Pesca e Aquicultura, Santo Amaro, Sao Paulo. Brasil
Año:
Volumen: 92
Número: 1
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico, descriptivo
Resumen en inglés Arapaima is a widely-distributed fish of enormous economic importance in the Amazon region. In the present study, a total of 232 specimens were sampled, 121 from five sites in the Amazon basin and 111 from five sites in the Tocantins-Araguaia basin. The analyses investigated fragments of the Cytochrome b, Control Region, Cytochrome Oxidase I, NADH dehydrogenase subunit 2 and seven loci microsatellites. The analyses revealed the existence of two mitochondrial lineages within the general area, with no haplotypes shared between basins, and genetic variability significantly higher in the Amazon than in the Tocantins-Araguaia basin. Two divergent, but sympatric mitochondrial lineages were found in the Amazon basin, but only a single lineage in the Tocantins-Araguaia basin. The existence of these two mitochondrial lineages indicates that past events, probably occurring during the Pleistocene, resulted in the separation of the populations of this species and molded its evolutionary history, which is reflected directly in its mitochondrial DNA. The analysis of the arapaima population structure identified distinct levels of diversity within the distribution of the species, indicating specific geographic regions that will require special attention for the development of conservation and management strategies
Disciplinas: Biología
Palabras clave: Peces,
Genética,
Evolución y filogenia,
Peces de agua dulce,
Estructura de la población,
Diversidad genética,
Diferenciación genética,
Linaje,
Arapaima gigas,
Osteoglossidae,
Brasil
Keyword: Fish,
Genetics,
Evolution and phylogeny,
Freshwater fish,
Population structure,
Genetic diversity,
Genetic differentiation,
Lineage,
Arapaima gigas,
Osteoglossidae,
Brazil
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