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- Title
Estimation of Maximum Sustainable Yield of Bombay Duck, Harpodon nehereus Fishery in Pakistan Using the CEDA and ASPIC Packages.
- Authors
Kalhoro, Muhsan Ali; Qun Liu; Memon, Khadim Hussain; Chang, Muhammad Saleem; Jatt, Abdul Nabi
- Abstract
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 1011 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 (R² = 0.900), 31.421 (R² = 0.916), 29.111 (R² = 0.909), respectively, while from Schaefer and Pella-Tomlinson models were 27.34 t (R² = 0.895), 36.64 t (R² = 0.911), 32.54 t (R² = 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 (R² = 0.926), 30.5 t (R² = 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.
- Subjects
BOMBAY duck (Fish); SUSTAINABLE fisheries; SURPLUS agricultural commodities; MAXIMUM sustainable yield (Population ecology); PRODUCTION functions (Economic theory)
- Publication
Pakistan Journal of Zoology, 2013, Vol 45, Issue 6, p1757
- ISSN
0030-9923
- Publication type
Article