This study on Eucinostomus melanopterus was conducted from September 2014 to June 2016 in the Saloum estuary. Samples were collected using gillnets (monofilament polyamide) with 28; 30; 32; 36 and 40 mm of mesh size (Knot to knot). The aim of this study was to provide information on length frequency distribution, length-weight relationship and condition factor for E. melanopterus in the Saloum estuary. Analysis of the size frequency distribution was bimodal with modes equal to 13 and 18 cm, respectively. The length-weight relationship showed positive allometric growth with b = 2.966. Values of condition the factor were greater than 1, indicating that individuals of E. melanopterus were in good physiological condition. The highest K value is obtained in the transition period between the hot and cold season (K = 1.327±0.059) and the lowest value in the transition period between the cold and hot season (k = 1.21±0.083).

The determination of the growth and exploitation parameters of Liza dumerili is carried out by the length frequency analysis method. Samples are either obtained from landings from the Joal Fadiouth artisanal fishery supplemented by catches made in experimental fishing by a purse seine. The measurements included total length, total weight, eviscerated weight and gonad weight. The data were analyzed by the FISAT II software for biometric analysis which include asymptotic length and growth coefficient (K) among others. For statistical analysis we used Past software for naturalists. The results obtained showed isometric isometry with b = 3. The growth parameters estimated using the von Bertallanfy equation gave the following results for the asymmetric length L∞ = 39.55 cm and a growth coefficient k = 0.37 year-1. According to the methods used, the instantaneous mortality is Z = 2.61an-1, the fishing mortality F = 1.99 yr-1 and the natural mortality M = 0.62 yr-1. Virtual population analysis showed that L. dumerili is overexploited in the area with an exploitation rate E = 0.76. Juveniles are the most affected by fishing pressure. In the management of local fisheries, management measures specific to the species are required.