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Management strategies to minimize the dredging impacts of coastal development on fish and fisheries
Conservation Letters ( IF 8.5 ) Pub Date : 2018-06-08 , DOI: 10.1111/conl.12572
Amelia S. Wenger 1 , Christopher A. Rawson 2 , Shaun Wilson 3, 4, 5 , Stephen J. Newman 2, 3, 6 , Michael J. Travers 2, 3, 6 , Scott Atkinson 7 , Nicola Browne 2 , Douglas Clarke 8 , Martial Depczynski 3, 9, 10 , Paul L.A. Erftemeijer 3, 9 , Richard D. Evans 4, 9 , Jean-Paul A. Hobbs 2 , Jennifer L. McIlwain 2, 3 , Dianne L. McLean 9 , Benjamin J. Saunders 2, 3 , Euan Harvey 2, 3
Affiliation  

Accelerating coastal development and shipping activities dictate that dredging operations will intensify, increasing potential impacts to fishes. Coastal fishes have high economic, ecological, and conservation significance and there is a need for evidence‐based, quantitative guidelines on how to mitigate the impacts of dredging activities. We assess the potential risk from dredging to coastal fish and fisheries on a global scale. We then develop quantitative guidelines for two management strategies: threshold reference values and seasonal restrictions. Globally, threatened species and nearshore fisheries occur within close proximity to ports. We find that maintaining suspended sediment concentrations below 44 mg/L (15–121 bootstrapped CI) and for less than 24 hours would protect 95% of fishes from dredging‐induced mortality. Implementation of seasonal restrictions during peak periods of reproduction and recruitment could further protect species from dredging impacts. This study details the first evidence‐based defensible approach to minimize impacts to coastal fishes from dredging activities.

中文翻译:

尽量减少沿海发展对鱼类和渔业的疏dr影响的管理战略

沿海开发和航运活动的加速要求挖泥作业将加剧,对鱼类的潜在影响增加。沿海鱼类具有很高的经济,生态和保护意义,因此需要关于如何减轻疏activities活动影响的基于证据的定量准则。我们在全球范围内评估从疏to到沿海鱼类和渔业的潜在风险。然后,我们为两种管理策略制定定量准则:阈值参考值和季节性限制。在全球范围内,濒临灭绝的物种和近岸渔业在港口附近发生。我们发现,保持悬浮沉积物浓度低于44 mg / L(15–121自举CI)且少于24小时可保护95%的鱼类免于因疏ging而导致的死亡。在繁殖和募集高峰期实施季节限制可以进一步保护物种免受疏ging影响。这项研究详细介绍了第一种基于证据的防御方法,以最大程度地减少疏dr活动对沿海鱼类的影响。
更新日期:2018-06-08
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