Maximum Sustainable Yield Estimates of Marine Captured Shrimp Fishery of the Bay of Bengal, Bangladesh by Using Surplus Production Model

Surplus-production models (SPMs) are the foremost conventional methodical tool for assessing fish stock when the data comprised of a time series of catches for an exploited population. Annual catch and effort data of 24 years from 1991 to 2014 were analyzed to estimate the Maximum Sustainable Yield (MSY) of marine captured shrimps of Bangladesh by using packages of CEDA and ASPIC. The maximum catch was found 4188 Mt in 1992 and the minimum was 2175 Mt in 2006. In CEDA, the MSY was estimated by using the initial proportion (IP) value of 0.7 because the starting catch was approximately 70% of the maximum catch. The estimated MSY values of Fox and Schaefer from CEDA with two error assumptions were 2527 Mt and 2584 Mt; 2794 Mt and 2655 Mt, respectively. Besides, the estimated MSY results of Fox and Logistic (Schaefer) models from the ASPIC packages were 2472 Mt and 2347 Mt respectively. In conclusion, the estimated MSY values were smaller than the last catch (2733Mt) reveals the overfished stock of marine captured shrimp fishery which needed instant management strategies for sustainability.