Report of Poecilia mexicana in a fish assemblage from a Gulf of Mexico blind estuary.

[摘要] The fish assemblage composition at the end of estuarine inlet closed period (May 2013) fromLaguna El Llano blind estuary located in Veracruz State, Mexico, is described here as under hypersalinity(73 PSU), low turbidity and well oxygenated waters. The fish assemblage was comprised of four fishspecies: freshwater opportunistic shortfin molly Poecilia mexicana, two marine opportunistic flatheadgray mullet Mugil cephalus and gray snapper Lutjanus griseus, and diadromous catadromous fat snookCentropomus parallelus; but in this assemblage P. mexicana was the most abundant species, and werecollected mature males and females in superfetation stage, while another three species were in standardlengths correlated to undifferentiated and juvenile gonadic stages. In trophic terms, P. mexicana and M.cephalus were first order detritivorous consumers, L. griseus and C. parallelus feed on fish andcrustacean mainly. This is the first report of these species under hypersalinity water conditions in Mexico.

[学科分类] 水产科学

[关键词] Poecilia mexicana;blind estuary;hypersalinity;Gulf of Mexico;Poeciliidae.