Population dynamics and stock assessment of Hilsa Shad, Tenalosa ilisha in Khuzestan province coast

Subject Areas : New Technologies in Aquaculture Development

Received: 2020-01-25 Accepted : 2020-01-25 Published : 2010-02-20

Keywords: Mortality, Persian Gulf, Population dynamic, Keywords: Stock assessment, Hilsa Shad,

Abstract :

Abstract The present study was carried out the population dynamics and stock assessment of Hilsa Shad in costal of the Khuzestan province (including Abadan) using the commercial catch data. Totally, more than 9000 specimen of Hilsa Shad were measured during 2007-2008. Population parameters were estimated using FiSAT software program. The growth parameters of von Bertalanffy equation were estimated as:  L∞: 42.81 and K: 0.9 and t0: -0.25. Mortality coefficients such as total mortality (i.e. Z: 3.78) and natural mortality (i.e. M: 1.37) and fishing mortality (i.e.F:2.41) were estimated. Exploitation ratio, E, was estimated to be 0.64 and these high values of E showed that the Hilsa Shad stock in the region is overexploited. Exploitation rate was estimated 0.61 and Annual total stock at the beginning of the year and the annual average standing stock and MSY were estimated 7615 ton, 1927 ton, 3642 ton respectively. Theresult of the study showed exploitation ratio of the Hilsa Shad stock (is reaching to the max and in order to decrease it, a serious tact should be thought.