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Title: Assessment of maximum sustainable yield of Acanthopagrus berda from Pakistani marine waters by applying surplus production models
Authors: Memon, Aamir Mahmood
Liu, Qun
Baloch, Wazir Ali
Memon, Khadim Hussain
Mohsin, Muhammad
Karim, Ehsanul
Liao, Baochao
Keywords: Acanthopagrus berda;Maximum sustainable yield;Surplus production models;CEDA;ASPIC;Pakistan
Issue Date: Jul-2017
Publisher: NISCAIR-CSIR, India
Abstract: Picnic Sea bream (Acanthopagrus berda) fishery in the Northern Arabian Sea from Pakistani marine waters was analyzed using catch and effort data (1991-2008). Maximum, minimum and average catch was recorded as 1088 mt in 1999, 586 mt in 1991 and 828 mt year-1 respectively. MSY (Maximum sustainable yield) and other key fish population parameters of K (carrying capacity), q (catchability coefficient), r (intrinsic population growth rate) and CV (coefficient variation) values of the calculated MSY were estimated by CEDA (catch and effort data analysis) and ASPIC (a surplus production model incorporating covariates) computer software packages. The fishing mortality at maximum sustainable yield FMSY = 0.114 from logistic model and FMSY= 0.057 from Fox model was estimated by ASPIC. The stock biomass given MSY BMSY = 11990 (CV= 0.083) from Fox model and MSY BMSY = 13630 (CV= 0.037) was estimated in ASPIC. In CEDA the initial proportion (IP) of 0.5 was used, because starting catch was approximately 50% of the maximum catch. The estimated results of MSY using CEDA with three surplus production models Fox, Schaefer and Pella Tomlinson under three error assumptions of Normal, Log-Normal and Gamma were about 620-800 mt, which was lower than the catch of 897 mt in 2008, indicating that the A. berda fishery in the marine waters of Pakistan has been overexploited, therefore it is suggested that measures should be taken to reduce fishing effort for the rational exploitation of the fishery.
Page(s): 1410-1416
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.46(07) [July 2017]

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