Population Study of Macrobrachium Tenellum (Smith 1871) in Coyuca De Benítez Lagoon, Guerrero, Mexico

Abstract

The population of Macrobrachium tenellum (Smith 1871) in Coyuca de Benitez lagoon, Guerrero, Mexico, was studied throughout one year. The follow- ing population parameters were recorded for 569 or- ganisms: a sex ratio of 2:1 females/males, an average total length of 7.52 cm (8.02 cm for males, 7.01 cm for females) and an average total weight of 4.28 g (5.95 g for males, 4.02 g for females). The species reproduces throughout the year with an average fe- cundity of 984 eggs for small females (3.80 cm long) and of900 to 1200 eggs for bigger specimens (6.70 to 8.00 cm long). I.