Analysis of fish population size distributions confirms cessation of fishing in marine protected areas

Analysis of fish population size distributions confirms cessation of fishing in marine protected areas
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鱼类种群规模分布分析证实海洋保护区已停止捕捞

DOI:
10.1111/conl.12775
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发表时间:
2020
影响因子:
8.5
通讯作者:
Caselle, Jennifer E.
Caselle, Jennifer E.
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
White, J. Wilson;Yamane, Mark T.;Nickols, Kerry J.;Caselle, Jennifer E.

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限制或禁止野生种群收获的保护区数量正在增加。总体而言,保护区预计将增加以前捕捞的物种的数量。保护区是否达到这一期望,通常是通过评估实施后的大量趋势来评估的。然而,收成实际上已经停止的潜在假设很少得到直接检验。确定保护区内非法捕捞(偷猎)是否仍在继续,对于规划、执法和适应性管理十分重要。在这里,我们估计了从2003年(实施海洋保护区)到2017年,加州海峡群岛海洋保护区和非海洋保护区参考点内的四种海带森林鱼类的收获率。我们通过将大小结构的人口模型与调查数据进行拟合来估计收成。总体而言,海洋保护区的收获率实际上为零,但非海洋保护区的收获率要高得多。这表明成功遵守了《海洋保护区条例》,并可能将捕捞工作转移到参考地点。然而,在MPA的两个地点发现了一些偷猎行为,突出了评估这一数量的重要性。这一建模方法可以提供一种工具来补充MPA网络的长期管理,特别是考虑到在各个海洋保护区的空间尺度上获取收获率数据的困难。
The number of protected areas that restrict or prohibit harvest of wild populations is growing. In general, protected areas are expected to increase the abundance of previously‐harvested species. Whether a protected area achieves this expectation is typically evaluated by assessing trends in abundance after implementation. However, the underlying assumption that harvest has actually ceased is rarely tested directly. Determining whether illegal harvest (poaching) has continued in a protected area is important to planning enforcement and adaptive management. Here, we estimated harvest rates for four kelp forest fish species inside marine protected areas (MPAs) and non‐MPA reference sites in the California Channel Islands, from 2003 (when MPAs were implemented) to 2017. We estimated harvest by fitting a size‐structured population model to survey data. Overall, harvest rates were effectively zero in MPAs but much higher in non‐MPA sites. This indicates successful adherence to MPA regulations, and possible displacement of fishing effort to reference sites. However, some poaching was detected in two MPA sites, highlighting the importance of assessing this quantity. This modeling approach could provide a tool to complement the long‐term management of MPA networks, particularly given the difficulty of acquiring harvest rate data at the spatial scale of individual MPAs.
在拥挤的地中海中进行全面和部分保护的生态影响:一项区域荟萃分析。
DOI: 10.1038/s41598-017-08850-w
发表时间: 2017-08-21
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发表时间: 1998
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发表时间: 2018-05-01
影响因子: 1.1
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DOI: --
发表时间: 2013
期刊:
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