Evidence for genetic differentiation in the european conger eel Conger conger based on mitochondrial DNA analysis |
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Authors: | Alberto Teodorico Correia Rui Faria Paulo Alexandrino Carlos Antunes Eduardo José Isidro João Coimbra |
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Institution: | Centro Interdisciplinar de Investigação Marinha e Ambiental, Rua dos Bragas 289, 4050-123 Porto,;Faculdade de Ciências da Saúde da Universidade Fernando Pessoa, Rua Carlos da Maia 296, 4200-150 Porto,;Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, 4485-661 Vairão,;Faculdade de Ciências da Universidade do Porto, Praça Gomes Teixeira, 4099-022 Porto,;Departamento de Oceanografia e Pescas da Universidade dos Açores, 9901-862 Horta and;Instituto Ciências Biomédicas Abel Salazar da Universidade do Porto, Largo Abel Salazar 2, 4099-033 Porto, Portugal |
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Abstract: | ABSTRACT: The European conger eel Conger conger is an important marine benthic fish in the North-East Atlantic and represents a valuable fishery resource. However, little is known about its reproductive biology. In an attempt to gain a better understanding of the conger eel population structure, mitochondrial DNA (mtDNA) sequences were examined. A region with 432 bp of the control region of the mtDNA was sequenced from 40 individuals from six different locations around the central and eastern North Atlantic Ocean. Thirty variable positions defined 28 distinct haplotypes. The average sequence difference within samples (1.3–4.2%) was comparable to those between samples (1.4–3.6%). MtDNA sequence-based statistical tests showed significant geographic differentiation between some local population samples, suggesting that the conger eel does not comprise a single panmictic population. However, given our sample sizes, these preliminary results should be interpreted with caution and more individuals from more sites, including the Mediterranean Sea, should be analyzed in detail. The genetic variability detected in this study is an initial step to elucidate the genetic background of the conger eel population structure. |
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Keywords: | Conger conger genetic variation mitochondrial DNA population structure |
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