Artigo

Population genetic analysis of Arapaima gigas, one of the largest freshwater fishes of the Amazon basin: Implications for its conservation

The present study reports the first population genetic analysis of Arapaima gigas, an important but critically over-exploited fish species of the Amazon basin. We sequenced two discontinuous mitochondrial DNA regions of 1204 base-pairs (bp) (NADH1 segment) and 1143bp (ATPase segment) from 139 indivi...

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Autor principal: Hrbek, Tomas
Outros Autores: Farias, Izeni P., Crossa, Marcelo, Sampaio, Iracilda C., Porto, Jorge Ivan Rebelo, Meyer, Axel
Grau: Artigo
Idioma: English
Publicado em: Animal Conservation 2020
Assuntos:
Conservation Genetics
Conservation Management
Fish
Genetics, Population
Arapaima Gigas
Pisces
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/18825
id oai:repositorio:1-18825
recordtype dspace
spelling oai:repositorio:1-18825 Population genetic analysis of Arapaima gigas, one of the largest freshwater fishes of the Amazon basin: Implications for its conservation Hrbek, Tomas Farias, Izeni P. Crossa, Marcelo Sampaio, Iracilda C. Porto, Jorge Ivan Rebelo Meyer, Axel Conservation Genetics Conservation Management Fish Genetics, Population Arapaima Gigas Pisces The present study reports the first population genetic analysis of Arapaima gigas, an important but critically over-exploited fish species of the Amazon basin. We sequenced two discontinuous mitochondrial DNA regions of 1204 base-pairs (bp) (NADH1 segment) and 1143bp (ATPase segment) from 139 individuals of A. gigas representing eight localities spanning the Amazon basin from Iquitos, Peru to Macapá, Brazil. We discovered 34 haplotypes separated by 44 segregating sites. The two most common haplotypes are shared among all populations and isolation-by-distance appears to be the most important population dynamic, although there is no significant association between geographical distance and genetic differentiation. Observed patterns of differentiation appear to be attributable largely to anthropogenic factors associated with over-exploitation. Greatest haplotypic diversity exists upstream of Manaus and in areas away from large centres of population. The female variance and inbreeding effective population sizes are approximately 150 000 individuals and localities in the Amazon basin are connected by gene flow. Naturally low levels of population differentiation and relatively high between-population connectivity is encouraging for the conservation and management of A. gigas. If strategically placed biological reserves were created throughout the Amazon basin to act as sources of emigrants within a source-sink metapopulation model, we believe locally depleted populations can be re-populated and maintained by individuals immigrating from these reserves. © 2005 The Zoological Society of London. 2020-06-15T22:03:16Z 2020-06-15T22:03:16Z 2005 Artigo https://repositorio.inpa.gov.br/handle/1/18825 10.1017/S1367943005002210 en Volume 8, Número 3, Pags. 297-308 Restrito Animal Conservation
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
topic Conservation Genetics
Conservation Management
Fish
Genetics, Population
Arapaima Gigas
Pisces
spellingShingle Conservation Genetics
Conservation Management
Fish
Genetics, Population
Arapaima Gigas
Pisces
Hrbek, Tomas
Population genetic analysis of Arapaima gigas, one of the largest freshwater fishes of the Amazon basin: Implications for its conservation
topic_facet Conservation Genetics
Conservation Management
Fish
Genetics, Population
Arapaima Gigas
Pisces
description The present study reports the first population genetic analysis of Arapaima gigas, an important but critically over-exploited fish species of the Amazon basin. We sequenced two discontinuous mitochondrial DNA regions of 1204 base-pairs (bp) (NADH1 segment) and 1143bp (ATPase segment) from 139 individuals of A. gigas representing eight localities spanning the Amazon basin from Iquitos, Peru to Macapá, Brazil. We discovered 34 haplotypes separated by 44 segregating sites. The two most common haplotypes are shared among all populations and isolation-by-distance appears to be the most important population dynamic, although there is no significant association between geographical distance and genetic differentiation. Observed patterns of differentiation appear to be attributable largely to anthropogenic factors associated with over-exploitation. Greatest haplotypic diversity exists upstream of Manaus and in areas away from large centres of population. The female variance and inbreeding effective population sizes are approximately 150 000 individuals and localities in the Amazon basin are connected by gene flow. Naturally low levels of population differentiation and relatively high between-population connectivity is encouraging for the conservation and management of A. gigas. If strategically placed biological reserves were created throughout the Amazon basin to act as sources of emigrants within a source-sink metapopulation model, we believe locally depleted populations can be re-populated and maintained by individuals immigrating from these reserves. © 2005 The Zoological Society of London.
format Artigo
author Hrbek, Tomas
author2 Farias, Izeni P.
Crossa, Marcelo
Sampaio, Iracilda C.
Porto, Jorge Ivan Rebelo
Meyer, Axel
author2Str Farias, Izeni P.
Crossa, Marcelo
Sampaio, Iracilda C.
Porto, Jorge Ivan Rebelo
Meyer, Axel
title Population genetic analysis of Arapaima gigas, one of the largest freshwater fishes of the Amazon basin: Implications for its conservation
title_short Population genetic analysis of Arapaima gigas, one of the largest freshwater fishes of the Amazon basin: Implications for its conservation
title_full Population genetic analysis of Arapaima gigas, one of the largest freshwater fishes of the Amazon basin: Implications for its conservation
title_fullStr Population genetic analysis of Arapaima gigas, one of the largest freshwater fishes of the Amazon basin: Implications for its conservation
title_full_unstemmed Population genetic analysis of Arapaima gigas, one of the largest freshwater fishes of the Amazon basin: Implications for its conservation
title_sort population genetic analysis of arapaima gigas, one of the largest freshwater fishes of the amazon basin: implications for its conservation
publisher Animal Conservation
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/18825
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score 11.755432

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