Efficacy of harvest and minimum size limit regulations for controlling short‐term harvest in recreational fisheries
Efficacy of harvest and minimum size limit regulations for controlling short‐term harvest in recreational fisheries
复制标题
休闲渔业中控制短期收获的收获效率和最小规格限制
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
A. Cooper
中科院分区：
文献类型：
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作者：
B. Poorten;S. Cox;A. Cooper
在制定渔业管理计划时，必须考虑减少总捕捞量的条例的潜在效力。随机森林（RF）建模方法被用来研究如何改变每垂钓者收获或最小尺寸限制法规影响运动渔业收获在美国大西洋沿岸休闲渔业。每个垂钓者的收获限制（即袋限制）通常最初很高，随后减少，而几乎一半的最低长度限制最初低于成熟时的长度，随后增加。在所审查的大多数渔业中，捕捞限额的极端减少（例如从无限制到捕捞和释放）在限制渔业总捕捞量方面基本上无效。越来越严格的最低长度限制造成了更大的平均收获减少比每垂钓者收获限制。一些法规的变化与更高的垂钓努力，从而增加收获，这表明，当努力不能受到约束，更直接的收获限制，应考虑。
It is important to consider the potential effectiveness of regulations for reducing total harvest levels when developing fishery management plans. A random forest (RF) modelling approach was used to examine how changing per-angler harvest or minimum size limit regulations affected sport fishery harvest in US Atlantic coast recreational fisheries. Harvest limits per angler (i.e. bag limits) were typically high initially and subsequently reduced, whereas almost half of minimum length limits were initially below the length-at-maturity and subsequently increased. Across most fisheries examined, extreme reductions in harvest limits (e.g. from unlimited to catch-and-release) were largely ineffective at limiting total fishery harvest. Increasingly restrictive minimum length limits caused a greater average harvest reduction than per-angler harvest limits. Some regulation changes were associated with higher angling effort and thus increased harvest, which suggests that when effort cannot be constrained, more direct harvest limitations should be considered.