Population dynamics of the native apple snail Pomacea flagellat a (Ampullariidae) in a coastal lagoon of the Mexican Caribbean

摘要: Populat ion dynamics of the native apple snail Pomacea flagellata (Ampullariidae) in a coastal lagoon Mexican Caribbean Apple snails spp inhabit tropical and subtropical freshwater environments are ecological economic importance. To evaluate population P. flagellata, monthly samples were collected from Guerrero Lagoon (Yucatan Peninsula) June 2012 to May 2013. The measured environmental variables did not differ significantly among sampling stations. However, salinity was lower during rainy season, temperature north season (i.e., dominated by cold fronts). more abundant they restricted portion that receives discharges. ranged 4 55 mm size, with maximum estimated length L∞ = 57.75 growth rate K 0.68 y –1 (the abbreviation “y” means “year”) seasonal oscillation; lowest occurred early December. Longevity at 3.3 mortality 1.89 . Mean biomass 124.65 g/ha, somatic production 178.32 g ha turnover 1.43 We conclude abundance very low could be influenced salinity. Moreover, parameters for reported literature snail. This is first study brackish environment.