Seasonal fishery dynamics of a previously unexploited rainbow trout population with contrasts to established fisheries
Seasonal fishery dynamics of a previously unexploited rainbow trout population with contrasts to established fisheries
复制标题
以前未开发的虹鳟鱼种群的季节性渔业动态与已建立的渔业的对比
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
J. Post
中科院分区：
文献类型：
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作者：
B. Poorten;J. Post
摘要 尽管钓鱼者和鱼类种群之间的捕食者-猎物相互作用已得到充分研究和理解，但对于轻度和充分开发种群之间这些相互作用是否存在差异却知之甚少。此外，人们对捕获率在季节内的变化知之甚少。这些差异被认为部分是由于捕获和释放后鱼类行为的变化造成的，这降低了种群的整体可捕获性。为了解决这些问题，我们对以前未开发的虹鳟鱼 Oncorhynchus mykiss 种群进行了垂钓，并将季节内的渔业动态与充分开发的种群进行了对比。我们发现，引入钓鱼后，捕获率迅速下降；此外，一旦发生这种情况，钓鱼者的努力就会减少。与大多数被剥削的种群相比，轻度剥削种群的单位努力捕获量 (CPUE) 和可捕获性最初相当高，但在整个夏季迅速下降，达到......
Abstract Although predator–prey interactions between anglers and fish populations are well studied and understood, little is known about whether these interactions differ between lightly and fully exploited populations. Furthermore, within-season shifts in catch rates are poorly understood. These differences have been thought to be due in part to changes in fish behavior after catch and release, which reduces the overall catchability of the population. To address these questions, angling was introduced to a previously unexploited population of rainbow trout Oncorhynchus mykiss and the within-season fishery dynamics were contrasted with those of fully exploited populations. We found that catch rates rapidly decreased after the introduction of angling; moreover, once this had occurred, angler effort decreased. Catch per unit effort (CPUE) and catchability of the lightly exploited population were initially quite high compared with most exploited populations but quickly decreased throughout the summer to leve...