Genetic differentiation of European anchovy (Engraulis encrasicolus) along the Moroccan coast reveals a phylogeographic break around the 25th parallel North

Autor:	François Bonhomme, Najib Charouki, Touria Benazzou, Khalil Chahdi Ouazzani, Malika Chlaida
Přispěvatelé:	Université Mohammed V, Institut National de Recherche Halieutique [Casablanca, Maroc] (INRH), Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UR226
Rok vydání:	2017
Předmět:	0106 biological sciences Engraulis encrasicolus [SDV]Life Sciences [q-bio] Introgression Aquatic Science Biology Oceanography 010603 evolutionary biology 01 natural sciences Correspondence analysis Latitude offshore ecotype lagoonal ecotype Engraulis European anchovy 14. Life underwater Ecology Evolution Behavior and Systematics Ecotype Ecology 010604 marine biology & hydrobiology population structure biology.organism_classification Moroccan coast Phylogeography microsatellite variation Genetic structure
Zdroj:	Marine Biology Research Marine Biology Research, Taylor & Francis, 2017, 13 (3), pp.342-350. ⟨10.1080/17451000.2016.1257811⟩
ISSN:	1745-1019 1745-1000
DOI:	10.1080/17451000.2016.1257811
Popis:	International audience; Seven microsatellite markers were used to investigate the population structure of the offshore ecotype of the European anchovy (Engraulis encrasicolus) by comparing 12 marine samples collected off the Moroccan coast with an inshore sample taken as a reference for the lagoonal ecotype. F-statistics, correspondence analysis and Bayesian assignment all concurred to cluster the European anchovy in this region into three groups: (i) one reference lagoonal sample, (ii) samples north of the 25°N latitude and (iii) samples south of it. Moreover, the Bayesian cluster analysis pointed toward the existence of an admixture between the group north of 25°N and the lagoonal ecotype, while this was not detectable with the group south of 25°N. Differential introgression between the two ecotypes could be one of the plausible explanations for the observed genetic structure and reveals the possible existence of a phylogeographic break around the 25th parallel North. Our study illustrates the fact that, for those species that encompass several incompletely isolated ecotypes, the level of gene flow among them may vary in space and serve as a tool for stock identification. This information may be useful to improve fishery management of this important harvested species along the Moroccan coast.
Databáze:	OpenAIRE
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