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Title: Growth, mortality and exploitation rate of Sardinella longiceps (Valenciennes, 1847) from Pakistani waters based on length frequency distribution data
Authors: Nadeem, Ashraf
Kalhoro, Muhsan Ali
Buzdar, Muhammad Aslam
Tariq, Sonia
Shafi, Muhammad
Afzaal, Zainab
Shah, Hina
Saeed, Faisal
Haroon, Ameena
Ahmed, Irfan
Keywords: Pakistan;Sardinela longiceps;Growth;Mortality;Length frequency distribution data
Issue Date: Aug-2017
Publisher: NISCAIR-CSIR, India
Abstract: The computer software FiSAT package was used to analyze the growth and mortality parameters of S. longiceps. Length weight relationship parameters of both sexes combined were at W= 0.0179xb2.8583 (R2 = 0.819). ELEFAN method was used to estimate the von Bertalanffy growth function (VBGF) parameters and were estimated as L = 25.20 cm (FL), K = 1.4 year-1 and t0 value was calculated by Pauly’s formula as -0.929, hence the total mortality was estimated using length converted catch curve analysis as Z = 4.84 year-1 at 95% confidential interval between (CI = 3.32-6.37). Natural mortality was calculated as M = 2.255year-1 using an average sea surface temperature of 26 oC from Pakistani waters, hence the fishing mortality was obtained by F=Z-M = 2.560 year-1. Exploitation rate (E) was E = F/Z = 0.534 year-1. Present study results indicate that the stock of S. longiceps from Pakistani waters is in overexploitation state.
Page(s): 1693-1703
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.46(08) [August 2017]

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