Aislamiento de Microsatélites y flujo Genético en Dosidicus Gigas (D`Orbigny, 1835) entre el Golfo de California y La Costa Occidental de La Península de Baja California, México.

The jumbo squid, Dosidicus gigas (D´Orbigny, 1835) is a neritic and semioceanic species endemic from the eastern Pacific, ranging from north California, U.S.A (43oN) to south Chile (40oS) including the Gulf of California, inhabiting from the surface, down to 1000 meters depth. Particularly in the Gulf of California, is highly exploited where it’s considered one of the most important natural resources of the area. The management of this fishery faces many problems associated with the biology of the species as short life cycle, uneven growth rates and the lack of morphometric and/or meristic characters due to extreme plasticity, makes the studies neither accurate nor consistent. To assess the genetic structure of D. gigas 10 microsatellites were isolated and characterized, through an enriched genomic library. Most of the loci exhibited low amplification yield and heterocigosity deficit due to a high null allele frequency. Finally five loci were used to evaluate the intraspecific variability in tree localities in the Gulf and two in the west coast of the peninsula of California, from different years (2005 and 2008). FST paired test points that D.gigas in the sampled area is conformed by a single population, and there is no relationship between the geographic and genetic distance (Mantel test), the highest variability is temporal as indicated by the AMOVA between groups of different years.