DOI: 10.36347/sajb.2021.v09i10.003

Pages: 269-275

Chrysichthys nigrodigitatus exploitation in the Aghien lagoon, Côte d’Ivoire, were analyzed by applying growth and mortality parameters, exploitation rate, relative yield and relative biomass per recruit. Fish population were sampled monthly during one year between June 2014 and May 2015 from artisanal and experimental captures. All the parameters determined during this study were done by the FiSAT II software. Concerning growth parameters, results indicated that the asymptotic length (L∞) has been estimated at 380.76 mm SL, growth coefficient (K) was 0.48 year -1 and growth performance index (Φ') was 2.84. Growth modelization revealed 4 cohorts for Chrysichthys nigrodigitatus. The estimates of the total (Z), natural (M) and fishing (F) mortalities were 2.11, 0.55 and 1.56 year -1 respectively. The exploitation rate obtained (E = 0.74) is higher than Emax (Emax = 0.41), thus indicating that the C. nigrodigitatus stock is in a state of overexploitation.