Evaluation of the fishery status for King Soldier Bream Argyrops spinifer in Pakistan using the software CEDA and ASPIC

Abstract

Catch and effort data were analyzed to estimate the maximum sustainable yield (MSY) of King Soldier Bream, Argyrops spinifer (Forsskål, 1775, Family: Sparidae), and to evaluate the present status of the fi sh stocks exploited in Pakistani waters. The catch and effort data for the 25-years period 1985-2009 were analyzed using two computer software packages, CEDA (catch and effort data analysis) and ASPIC (a surplus production model incorporating covariates). The maximum catch of 3 458 t was observed in 1988 and the minimum catch of 1 324 t in 2005, while the average annual catch of A . spinifer over the 25 years was 2 500 t. The surplus production models of Fox, Schaefer, and Pella Tomlinson under three error assumptions of normal, log-normal and gamma are in the CEDA package and the two surplus models of Fox and logistic are in the ASPIC package. In CEDA, the MSY was estimated by applying the initial proportion (IP) of 0.8, because the starting catch was approximately 80% of the maximum catch. Except for gamma, because gamma showed maximization failures, the estimated results of MSY using CEDA with the Fox surplus production model and two error assumptions, were 1 692.08 t ( R 2 =0.572) and 1 694.09 t ( R 2 =0.606), respectively, and from the Schaefer and the Pella Tomlinson models with two error assumptions were 2 390.95 t ( R 2 =0.563), and 2 380.06 t ( R 2 =0.605), respectively. The MSY estimated by the Fox model was conservatively compared to the Schaefer and Pella Tomlinson models. The MSY values from Schaefer and Pella Tomlinson models were the same. The computed values of MSY using the ASPIC computer software program with the two surplus production models of Fox and logistic were 1 498 t ( R 2 =0.917), and 2 488 t ( R 2 =0.897) respectively. The estimated values of MSY using CEDA were about 1 700-2 400 t and the values from ASPIC were 1 500-2 500 t. The estimates output by the CEDA and the ASPIC packages indicate that the stock is overfi shed, and needs some effective management to reduce the fi shing effort of the species in Pakistani waters.

Early development and occurrence patterns of the Pagrinae seabream Argyrops bleekeri (Perciformes: Sparidae): Does early life history have implications for sparid relationships?

“…Two species of Argyrops, Argyrops filamentosus (Valenciennes 1830) and Argyrops spinifer (Forsskål 1775), have been relatively well described because of to their commercial importance. The reproductive biology and stock assessment of A. filamentosus were studied in the Arabian Sea off the coast of Oman (Al-Marzouqi et al, 2012;Jayabalan et al, 2011), and the growth, reproductive biology, feeding habits and stock assessment of A. spinifer were studied within the Persian Gulf and Pakistani waters (Al-Kiyumi et al, 2013;Al-Mamry et al, 2009;El-Sayed & Abdel-Bary, 1993Grandcourt et al, 2004;Memon et al, 2015). A previous study by Uehara et al (2017a) was the first to provide biological information on the growth, longevity, sexuality, maturity and reproductive cycle of A. bleekeri in the western North Pacific.…”

Growth and Mortality of Sillago sihama (Forsskål) from Karachi Coast, Pakistan

“…; Article no.AJRIZ.55277 estimated as indicates that the stock of also in creeks and estuaries, in the depth ranging from 0 to 60 m, the maximum length is 30 cm while commonly 15 cm [13,14]. It copepods, polychaetes, Decapods, vaceans and other small fishes [15].…”

Estimation of Maximum Sustainable Harvest Levels and Bioeconomic Implications of Babylonia spirata Fisheries in Pakistan by Using CEDA and ASPIC

“…Several researchers have computed MSY estimates of various fishery resources from Pakistani marine waters [7][8][9][10][11]. However, no published literature documents MSY estimates of B. spirata from Sindh, Pakistan in order to know its maximum economic sustainable contribution.…”