Fishing pressure can have strong impacts on fish populations, driving declines in abundance and, occasionally, changing life history traits. However, much of our current understanding of these phenomena derives from studies conducted decades or even centuries after the onset of fishing. Newly established fisheries provide an excellent opportunity to understand this critical early phase. Temporal trends in catch data and life history traits of the cyprinid fish Rastrineobola argentea (Pellegrin), now the target of a burgeoning artisanal fishery in Lake Nabugabo, Uganda, were analysed. Results showed that the R. argentea fishery intensified and became more selective during the first decade since its establishment (2008–2019), while catch-per-unit-effort of R. argentea (fisheries-independent abundance) at repeatedly sampled sites in the lake decreased over this same time period. Size-adjusted egg volume and ovary mass increased significantly over the time period, which may reflect a density-dependent response to a fisheries-induced population decline.

中文翻译：

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乌干达纳布加博湖非洲鲤鱼 Rastrineobola argentea 新兴手工渔业的趋势

捕捞压力会对鱼类种群产生强烈影响，导致丰度下降，有时还会改变生活史特征。然而，我们目前对这些现象的大部分理解来自捕鱼开始后几十年甚至几个世纪的研究。新建立的渔业为了解这一关键的早期阶段提供了绝佳的机会。分析了现在乌干达纳布加博湖新兴手工渔业目标的鲤科鱼Rastrineobola argentea (Pellegrin)的捕获数据和生活史特征的时间趋势。结果表明，R。 自成立以来的第一个十年（2008 年至 2019 年），阿根廷渔业加强并变得更具选择性，而R。 _ 在同一时间段内，湖中重复采样点的argentea （与渔业无关的丰度）下降。在此期间，大小调整后的卵子体积和卵巢质量显着增加，这可能反映了对渔业引起的人口下降的密度依赖性反应。