Allozymic variability in European anchovy Engraulis encrasicolus ( L .) along the Moroccan coasts

Chahdi Ouazzani K., Benazzou T., Chlaida M.

Date de parution: avril 2016
Volume: 40
Number: 2
Pagination: 163–171
Editeur: Société Française d'Ichtyologie

Allozyme variation was used to investigate for the first time the genetic structure of European anchovies, Engraulis encrasicolus (Linnaeus, 1758), along the Moroccan coasts. A total of 420 individuals were collected at 11 sites during the anchovy spawning period of 2012. Eleven loci were tested, among them only LDH* [E.C:1.1.27] and PGM * [E.C:] were polymorphic. Statistical analysis results showed no significant differentiation between samples (overall FST = 0.0077, p = 0.13). Genotypic proportions were not in accordance with Hardy-Weinberg predictions; an important heterozygote deficiency was detected (FIS = 0.48959 ± 0.07863, p < 0.001). The results are compared with those of other studies and are discussed in relation to hydroclimatic factors in the Moroccan coasts and to species behaviour in such environment.

Mots-clés: Allozyme variation - Engraulidae - Engraulis encrasicolus - Genetic variability - Moroccan coast
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