文章基本信息

标题：Challenges and possible impacts of artisanal and recreational fisheries on tigerfish Hydrocynus vittatus Castelnau 1861 populations in Lake Kariba, Zimbabwe
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作者：Terence Magqina ; Tamuka Nhiwatiwa ; Mwazvita T.B. Dalu 等
期刊名称：Scientific African
印刷版ISSN：2468-2276
出版年度：2020
卷号：10
页码：1-10
DOI：10.1016/j.sciaf.2020.e00613
语种：English
出版社：Elsevier
摘要：AbstractIncreased fishing pressure from artisanal and recreational fishing has led to the collapse of some important fish stocks around the world over the past years. There is currently limited understanding of the impacts of recreational and artisanal fishing on tigerfishHydrocynus vittatuspopulations in Lake Kariba and the socioeconomic factors behind them. Hence, this study investigated socioeconomic factors that act as drivers of the recreational and artisanal fishery industry and what sort of impact this would likely have on tigerfishH. vittatuspopulations using qualitative approaches. Eight three percent of the artisanal fishers interviewed recorded high catches during the summer season (October–February), which also coincides with the breeding season for tigerfish when it migrates up the rivers. Recreational anglers mainly caught females during the tigerfish tournament which is likely to have a significant effect on the tigerfish population in the long term through changes in tigerfish recruitment and other life history traits. Tigerfish size at sexual maturity and catch per unit effort which are all indicators of overexploitation were found to have decreased over the past years. Results further demonstrated increased fishing activities from artisanal and recreational fishing. It can be implied that the population of tigerfish may inadvertently be affected, but direct evidence that both recreational and artisanal fishing were having impacts on tigerfish populations was limited. It is therefore recommended that effective conservation measures such as preventing fish poaching during the tigerfish breeding season are put in place to protect the population and that of other fishes (i.e. potential prey).
关键词：KeywordsLake KaribaTigerfishBreeding seasonFishing tournamentHydrocynus vittatusSocioeconomic factorsSanyati Basin