A Mitigation Hierarchy Approach for Managing Sea Turtle Captures in Small-Scale Fisheries
A Mitigation Hierarchy Approach for Managing Sea Turtle Captures in Small-Scale Fisheries
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DOI：
10.3389/fmars.2020.00049
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发表时间：
2020-02-14
影响因子：
3.7
通讯作者：
Milner-Gulland, E. J.
中科院分区：
文献类型：
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作者：
Arlidge, William N. S.;Squires, Dale;Milner-Gulland, E. J.
已提出缓解层次作为管理渔业和减少海洋巨型动物兼捕物的总体框架，但需要实证应用以显示其实际效用。以秘鲁的一个小规模渔业社区为案例研究系统，我们测试了缓解层次结构如何支持减少刺网捕获海龟的努力，并将这些行动与更广泛的生物多样性目标联系起来。我们评估三个管理方案，利用生态风险评估（ERA）和定性管理策略评估，以评估生物，经济和社会因素之间的权衡。重点管理的龟类包括革皮龟、绿色龟、绿鳞龟。采用混合方法迭代的方法来收集数据，我们进行了文献综述，整理渔业和捕获的海龟种类的二手数据。然后，我们收集了原始数据，以填补所确定的知识空白，包括建立渔业的空间范围和计算渔业的海龟捕获率。我们使用定性ERA确定并评估了渔业对东太平洋区域管理单位内每个海龟物种构成的潜在风险。最后，我们评估了潜在的管理策略，以减少海龟捕获，纳入利益相关者的偏好，从基于生态系统的调查，并考虑初步估计的趋势，在一系列的性能指标。我们说明了拟议的框架如何整合现有的知识海洋巨型动物捕获的问题，并纳入既定的决策过程，以帮助确定数据差距。这支持对管理战略进行全面评估，以实现跨渔业和规模标准化的生物多样性目标。
The mitigation hierarchy has been proposed as an overarching framework for managing fisheries and reducing marine megafauna bycatch, but requires empirical application to show its practical utility. Focusing on a small-scale fishing community in Peru as a case study system, we test how the mitigation hierarchy can support efforts to reduce captures of sea turtles in gillnets and link these actions to broader goals for biodiversity. We evaluate three management scenarios by drawing on ecological risk assessment (ERA) and qualitative management strategy evaluation to assess trade-offs between biological, economic, and social considerations. The turtle species of management focus include leatherback turtle Dermochelys coriacea, green turtle Chelonia mydas, and olive ridley turtle Lepidochelys olivacea. Adopting a mixed-methods iterative approach to data collection, we undertook a literature review to collate secondary data on the fishery and the species of turtles captured. We then collected primary data to fill the knowledge gaps identified, including establishing the spatial extent of the fishery and calculating turtle capture rates for the fishery. We identified and evaluated the potential risk that the fishery poses to each turtle species within Pacific East regional management units using a qualitative ERA. Finally, we evaluated potential management strategies to reduce turtle captures, incorporating stakeholder preference from questionnaire-based surveys and considering preliminary estimates of trends across a range of performance indicators. We illustrate how the proposed framework can integrate existing knowledge on an issue of marine megafauna captures, and incorporate established decision-making processes to help identify data gaps. This supports a holistic assessment of management strategies toward biodiversity goals standardized across fisheries and scales.