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Santiago de Compostela, Spain

Baibai T.,Hassan II University | Baibai T.,Laboratorio Of Sistematica Molecular | Oukhattar L.,Hassan II University | Quinteiro J.V.,Laboratorio Of Sistematica Molecular | And 3 more authors.
Reviews in Fish Biology and Fisheries | Year: 2012

The European pilchard Sardina pilchardus represents the most commercially relevant fisheries resource in many countries bordering north Atlantic coasts and the Mediterranean Sea, being especially significant along the coast of Morocco. The continuous exploitation of this pelagic species for several decades places Morocco as the leader in sardine production. However, the conditions of exploitation of this resource underwent a great change during the last recent years. In order to identify the populations of the European pilchard sardine (Sardina pilchardus, Walbaum, 1792) in the Atlantic coast of Morocco and Spain, we have combined the truss network data to conduct multivariate analysis with biologic parameters and genetic analysis based on Microsatellite and mitochondrial control region data. Sardine morphometrics data truss variables from 10 samples spanning the Atlantic coast of Morocco were analysed by multivariate analysis. Thirteen morphometric measurements and some biological parameters such as the sex and the age of fishes were made for each individual. Discriminant analysis on size-corrected truss variables and cluster analysis of mean fishes shape using landmark data indicate, that the shape of north Moroccan sardines is distinct from the shape of sardines from south Morocco. However the analysis of the mitochondrial region and four microsatellites loci (Sp2, Sp7, Sp8 and SpI5) demonstrated an homogeneity population in the Moroccan Atlantic coast, with a low but significant genetic differentiation, which followed an isolation-by-distance pattern according to Mantel test. © 2011 Springer Science+Business Media B.V.

Quinteiro J.,Laboratorio Of Sistematica Molecular | Baibai T.,Laboratorio Of Sistematica Molecular | Baibai T.,Laboratoire Of Physiologie Et Of Genetique Moleculaire Pgm | Oukhattar L.,Laboratorio Of Sistematica Molecular | And 4 more authors.
Molluscan Research | Year: 2011

Two microsatellite DNA markers developed for the common octopus, Octopus vulgaris, were used to determine genotypes of four brooding female octopuses and 11 embryos sampled from their respective clutches, in order to confirm the multiple paternity hypothesis within this species. Two well-known reproductive behavioural patterns are apparently conflicting in mating outcome: the often-observed multiple mating and the role of the male's hectocotylus in removing stored spermatophores left by other males inside the female's oviducal gland. Genotyping data suggest that at least two males have been successful in fertilizing eggs sampled from each clutch, an evidence of multiple paternity in the common octopus. © 2011 Malacological Society of Australasia & Society for the Study of Molluscan Diversity.

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