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Assessment of exploited fish species in the Lake Edward System, East Africa
Journal of Applied Ichthyology ( IF 0.9 ) Pub Date : 2021-01-05 , DOI: 10.1111/jai.14161
Laban Musinguzi 1, 2 , Samuel Bassa 1 , Vianny Natugonza 3 , Maarten Van Steenberge 4 , William Okello 1 , Jos Snoeks 2, 5 , Rainer Froese 6
Affiliation  

The unknown status of inland fish stocks hinders their sustainable management. Therefore, increasing stock status information is important for sustainable inland fisheries. Fisheries reference points were estimated for five exploited fish species (11 stocks) in the Lake Edward system, East Africa, which is one of the most productive inland water systems. The aim was to ascertain the status of the fisheries and establish reference points for effective management. The reference points were based on four linked stock assessment approaches for data‐limited fisheries. Estimates showed poor stock status with the stocks defined as either collapsed, recruitment impaired or overfished. However, higher catches could be obtained under sustainable management. Estimates of maximum sustainable yield (MSY) and supporting biomass (Bmsy) are provided for 10 of the stocks as targets for rebuilding plans. The immediate target of management should be rebuilding biomass to Bmsy. Applicable measures include shifting length at first capture to the length that maximizes catch without endangering size structure and biomass, and livelihood diversification out of fisheries.

中文翻译:

对东非爱德华湖系统中被捕捞鱼类物种的评估

内陆鱼类种群的未知状况阻碍了其可持续管理。因此,增加种群状况信息对于可持续的内陆渔业很重要。估计了东非爱德华湖系统中五种被开发鱼类(11种种群)的渔业参考点,该系统是生产力最高的内陆水系之一。目的是查明渔业状况并建立有效管理的参考点。参考点基于针对数据有限的渔业的四种链接的种群评估方法。估计显示种群状况不佳,种群定义为倒闭,征募受损或过度捕捞。但是,在可持续管理下可以获得更高的产量。最大可持续产量(MSY)和支持性生物量的估算值(Bmsy)提供给其中的10个库存,作为重建计划的目标。管理的直接目标应该是将生物量重建为B msy。适用的措施包括将首次捕捞的长度转移到最大捕捞长度,而不会危及规模结构和生物量,以及渔业以外的生计多样化。
更新日期:2021-03-15
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