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Accessing the risk of overfishing faced by mullet fisheries and its ongoing economics in Pakistan
Indian Journal of Geo-Marine Sciences ( IF 0.5 ) Pub Date : 2020-09-25
Md Mohsin, Y Hengbin, U Nisar

In this study, catch statistics of mullets are first time evaluated to know their exploitation status and ongoing economic implications. Catch and effort (CE) figures of mullets acquired from Sindh, Pakistan was statistically evaluated by employing surplus production models (SPMs), non-equilibrium versions, through two famous fishery related software, viz., catch and effort data analysis (CEDA) and a stock production model incorporating covariates (ASPIC). In total three SPMs, i.e., Fox, Schaefer and Pella-Tomlinson were used to investigate CE statistics, 1995 to 2012. Obtained results reveal that catch per unit effort (CPUE) has considerably dropped from 0.206 (1995) to 0.055 (2012). CEDA estimates of maximum sustainable yield (MSY) remained conservative as they were calculated between 5100 to 6500 t against ASPIC for which estimates of this parameter remained between 5800 and 7600 t. Considering the results, it can be concluded that mullet fishery is experiencing overexploitation (OE). This OE is an indicator of economic losses by increasing costs and decreasing profits. Thus, mullet resource conservation is necessary for its long-term economic utilization. Therefore, it is suggested that the target reference point (TRP) with respect to harvest should be between 5100 to 5500 t. However, this study is a preliminary study, hence; further in-depth studies are suggested before making and implementing any management plan for mullet fishery in Sindh, Pakistan.

中文翻译:

了解鱼渔业面临的过度捕捞风险及其在巴基斯坦的持续经济状况

在这项研究中,首次评估了鱼的渔获量统计信息,以了解鱼的开采状况和持续的经济影响。通过使用两个著名的渔业相关软件,非平衡版本的剩余生产模型(SPM),对从巴基斯坦信德省获得的鱼的捕获量和努力量(CE)进行了统计评估。,捕获量和工作量数据分析(CEDA)以及包含协变量的库存生产模型(ASPIC)。从1995年到2012年,总共使用了三个SPM(即Fox,Schaefer和Pella-Tomlinson)调查了CE统计数据。获得的结果表明,每单位工作量的捕获量(CPUE)已从0.206(1995)下降到0.055(2012)。CEDA的最大可持续产量(MSY)估算值仍然相对保守,因为相对于ASPIC,该参数的估算值保持在5800至7600 t之间,因此估算值在5100至6500 t之间。考虑到结果,可以得出结论,鱼渔业正在遭受过度开发(OE)。该OE通过增加成本和减少利润来指示经济损失。因此,鱼资源的保存对于长期的经济利用是必要的。因此,建议相对于收获的目标参考点(TRP)应在5100至5500吨之间。但是,该研究只是初步研究。建议在制定和实施巴基斯坦信德省鱼渔业管理计划之前,进行进一步的深入研究。
更新日期:2020-09-25
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