The dynamics of unexploited population of Corbula trigona (Bivalvia: Corbulidae) in a brackish-water lagoon, Cote d'Ivoire

Population dynamics of the bivalve Corbula trigona were studied in a brackishwater environment of the Tendo Lagoon in Cote d'Ivoire. By means of FiSAT software 12 consecutive months length frequency data with a pooled sample size of 10 971 specimens were analysed. The seasonalized von Bertalanffy growth parameters were L∞ = 21.5 mm, K = 0.49·y -1, C = 0.39 and WP = 0.46. The seasonalized catch curve yielded an instantaneous total mortality coefficient Z of 1.41·y -1. Recruitment into the population was year-round with a major peak occurring between September and November.