Study of the mortality and exploitation parameters of Sander lucioperca (Linnaeus, 1758) in the Al Massira Reservoir

Abstract

The mortality parameters and exploitation of Sander lucioperca were studied for the first time in the reservoir of Al-Massira Dam. These parameters were estimated based on sizefrequency data processed by FISAT II software. Parameters such as total mortality (Z), natural mortality (M), fishing mortality (F), and exploitation rate (E) obtained are respectively 1.71 year-1; 0.42 year-1; 1.29 year-1 and 0.75. This study thus shows that this species undergoes fishing mortality (1.29 year-1) much higher than natural mortality (M = 0.42 year-1). Furthermore, Sander lucioperca is found in a state of overexploitation with an exploitation rate (E = 0.75) higher than the estimated maximum exploitation rate (Emax = 0.65).