Growth, Mortality and Exploitation of Penaeus semisulcatus in Jizan Fisheries, Saudi Arabia

Abstract

The growth parameters, mortality coefficients and exploitation rate of Penaeus semisulcatus in Jizan fisheries were determined during the fishing season 2015 / 2016. The growth curves and parameters were estimated using length-frequency data for combined sexes (pooled data). The S S growth parameters (L∞, K & to) for the sexes combined are estimated as L∞ = 94.40 mm, K = 0.81year-1 , tRoR = -0.20 year, M=1.634 year P-1P, Z=3.124 year P-1P , and F=1.961 year P-1P.The results indicated that, the current exploitation rate 'Ecur = 0.628' was higher than that required to get the maximum sustainable yield per recruit 'ERmaxR=0.581 .In the present study B/R was found 5.98 gm. The current biomass per recruit ratio indicates that the current exploitation rate is not suitable for maintaining a sufficient spawning stock biomass of P. semisulcatus in Jizan area which indicates that the stock status of fisheries is currently overexploited.