Spatial and temporal genetic homogeneity of the Monterey Spanish mackerel,Scomberomorus concolor, in the Gulf of California.
The genetic homogeneity of the Monterey Spanish mackerelScomberomorus concolorpopulation in the Gulf of California was confirmed using nine nuclear microsatellite loci in combination with mitochondrial cytochrome b gene sequences. Samples were collected from the upper and central Gulf areas, representing the two main biogeographical regions of the Gulf. The analyses support the existence of a single panmictic population ofS. concolorinhabiting the Gulf of California which in terms of fishery management represents a single genetic stock. Additionally, the contemporary effective population size estimated for theS. concolorpopulation (Ne = 3056.9) was high and similar to another pelagic species. The gene flow seems to be bidirectional between the upper and central Gulf, which coincides with the seasonal movements between both regions related to spawning and feeding activities. A population expansion event was detected, which agrees with a colonization-expansion hypothesis of theS. concolorpopulation in the Gulf.
Posgrado en Ciencias del Mar y Limnología, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México , Ciudad de México , Mexico.
Erika
E
Magallón-Gayón
Unidad Académica de Ecología y Biodiversidad Acuática, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México , Ciudad de México , Mexico.
Pindaro
P
Diaz-Jaimes
Unidad Académica de Ecología y Biodiversidad Acuática, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México , Ciudad de México , Mexico.
Manuel
M
Uribe-Alcocer
Fisheries; Gene flow; Historical demography; Microsatellites; Population genetics; mtDNA