Estimation of Maximum Sustainable Yield of Bombay Duck, Harpodon nehereus Fishery in Pakistan Using the CEDA and ASPIC Packages

作者：Kalhoro Muhsan Ali; Liu Qun^*; Memon Khadim Hussain; Chang Muhammad Saleem; Jatt Abdul Nabi

来源：Pakistan Journal of Zoology, 2013, 45(6): 1757-1764.

• Harpodon nehereus
• surplus production models
• MSY

Maximum Sustainable Yield (MSY) of Bombay duck Harpodon neherus fishery from Pakistan was estimated from the catch and effort data during 1995 - 2009. The average landing from fifteen years of Bombay duck fishery was 66 t. The highest catch was 101 t in 1996 and the lowest catch was recorded at 43 t in 2008. The CEDA and ASPIC non-equilibrium surplus production models were used in this study. CEDA includes three surplus production models of Fox, Schaefer and Pella-Tomlinson with three different error assumptions of normal, log-normal and gamma. Here we use initial proportion (IP) value of 0.9 because the starting value of the catch was roughly 90% of the maximum catch. The estimated MSY values from Fox model and three error assumptions were 25.57 t (R-2 = 0.900), 31.42 t (R-2= 0.916), 29.11 t (R-2= 0.909), respectively, while from Schaefer and Pella-Tomlinson models were 27.34 t (R-2 = 0.895), 36.64,t (R-2= 0.911), 32.54 t (R-2 = 903) from three different error assumptions respectively. The MSY values from Schaefer and Pella-Tomlinson models were the same. The MSY values from ASPIC when IP = 0.9, for the Fox and logistic models were 34.4 t (R-2 = 0.926), 30.5 t (R-2 = 0.931) respectively. Therefore we may suggest that CEDA and ASPIC estimated the MSY of the Bombay duck fishery from Pakistan at 25 - 35 t, which were lower than the current catch, and therefore we would recommend a reduction of fish landing for this fishery.

• 出版日期2013-12
• 单位中国海洋大学