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Growth and Mortality Parameters of Hilsa shad, Tenalosa ilisha in Khuzestan Province Coast
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Seyed Ahmad Reza Hashemi   , Gholamreza Mohammadi , Gholamhossen Eskandary |
| South of Iran aquaculture fishery research center |
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Abstract: (7764 Views) |
| The present study was carried out growth and mortality Parameters of Hilsa shad in the coasts of Khuzestan province (including Abadan and Hendejan ) using the commercial catch data. Totally more than 13000 specimens of Hilsa shad have been measured during 2007-2008. Population parameters were estimated using FiSAT software program. The growth parameters of von Bertalanffy equation were estimated as, L∞: 54.60 and K: 0.96 and t0: -0.14. Mortality coefficients such as total mortality, Z: 4.20and natural mortality, M: 1.34 and fishing mortality, F: 2.8 were estimated. Exploitation ratio, E was estimated to be 0.68 and these high values of E showed that the Hilsa shad stock in the region was overexploited. Results showed that exploitation ratio of the hilsa shad stock was over fishing and decreases exploitation ratio proposed. According to biological characteristics and with compare to American Fisheries Society (AFS) indices, Hilsa shad is classified as low vulnerable group fishes. |
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| Keywords: Hilsa shad, mortality, population dynamic |
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Full-Text [PDF 333 kb]
(2679 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2014/01/31 | Accepted: 2014/01/31 | Published: 2014/01/31
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