当前位置: X-MOL 学术ICES J. Mar. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Match of the day: optimized experimental design in alternate-haul gear trials
ICES Journal of Marine Science ( IF 3.3 ) Pub Date : 2021-03-22 , DOI: 10.1093/icesjms/fsab063
D Browne 1 , C Minto 2 , M McHugh 1 , S Murphy 2 , M Oliver 1 , R Cosgrove 1
Affiliation  

European Union (EU) fishers need a range of gear options to comply with requirements under the landing obligation. Alternative fishing gears may be implemented provided equivalent selectivity can be demonstrated. Catch comparison is a valid method of testing the size selectivity of two or more fishing gears and simultaneous gear deployment helps minimize between-haul spatiotemporal variability in abundance. Non-simultaneous or alternate-haul deployments are generally required for single-rig trawls or seines nets. In those gears, matching consecutive test and control hauls helps minimize such variability. Random-haul matching strategies have also been employed where consecutive deployments are not logistically possible. Here, we investigated the effects of different matching methodologies by simulating a range of stylized scenarios of between-haul variation in abundance. We resampled data from a multi-rig catch comparison trial and emulated consecutive or randomly matched hauls. We examined how haul matching methodology influences catch curve estimates and uncertainty. Aiming for a balance in abundance across consecutively matched hauls is optimal, while random-haul matching may be the best strategy if neither balanced abundance nor consecutive hauls can be achieved. Based on these outputs, we provide practical guidance for experimental design during planning and at-sea operations to optimize trial outputs.

中文翻译:

今日比赛:交替牵引齿轮试验中的优化实验设计

欧盟 (EU) 渔民需要一系列渔具选项以符合登陆义务的要求。如果可以证明具有同等的选择性,则可以使用替代渔具。渔获量比较是测试两个或多个渔具的尺寸选择性的有效方法,同时部署渔具有助于最大限度地减少运程之间的时空变化。单钻拖网或围网通常需要非同时或交替部署。在这些齿轮中,匹配连续的测试和控制牵引有助于最大限度地减少这种可变性。在逻辑上不可能连续部署的情况下,也采用了随机运输匹配策略。这里,我们通过模拟一系列丰富的长途变化的程式化场景来研究不同匹配方法的影响。我们从多钻机捕获比较试验中重新采样数据,并模拟连续或随机匹配的运输。我们研究了运输匹配方法如何影响捕获曲线估计和不确定性。在连续匹配的运输量之间寻求平衡是最佳的,而如果既不能实现平衡的丰富度也不能实现连续运输量,随机运输匹配可能是最佳策略。基于这些输出,我们为规划和海上作业期间的实验设计提供实用指导,以优化试验输出。我们研究了运输匹配方法如何影响捕获曲线估计和不确定性。在连续匹配的运输量之间寻求平衡是最佳的,而如果既不能实现平衡的丰富度也不能实现连续运输量,随机运输匹配可能是最佳策略。基于这些输出,我们为规划和海上作业期间的实验设计提供实用指导,以优化试验输出。我们研究了运输匹配方法如何影响捕获曲线估计和不确定性。在连续匹配的运输量之间寻求平衡是最佳的,而如果既不能实现平衡的丰富度也不能实现连续运输量,随机运输匹配可能是最佳策略。基于这些输出,我们为规划和海上作业期间的实验设计提供实用指导,以优化试验输出。
更新日期:2021-03-22
down
wechat
bug