Estimation of the effect of gear design changes on catch efficiency: Methodology and a case study for a Spanish longline fishery targeting hake (Merluccius merluccius)
Estimation of the effect of gear design changes on catch efficiency: Methodology and a case study for a Spanish longline fishery targeting hake (Merluccius merluccius)
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DOI：
10.1016/j.fishres.2016.09.013
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发表时间：
2017-01-01
影响因子：
2.4
通讯作者：
Tatone, Ivan
中科院分区：
文献类型：
--
作者：
Herrmann, Bent;Sistiaga, Manu;Tatone, Ivan
本文介绍了一种基于渔获量数据比较来估计不同渔具设计的相对渔获量效率的方法。这种方法不需要相同数量的部署或齿轮之间的交替，但它通过使用多模型推理来解释描述数据的多个竞争模型。通过应用双引导程序，该方法还占估计的不确定性，从部署之间的变化，捕获效率和鱼的可用性，以及不确定性的大小结构的捕获为个人部署。最后，通过将多模型推理结合到每次自举迭代中，该方法还考虑了由于模型选择的不确定性而导致的不确定性。使用所描述的方法，我们调查了齿轮设计的变化对西班牙延绳钓渔业捕捞效率的影响，目标是无须鳕（Merluccius merluccius）。我们测试和比较了四种不同的设计对传统的设计在渔业中使用。第一个是与自动化兼容的设计，在挂钩尺寸、钓鱼线长度和钓鱼线直径方面与传统设计不同（新的自动化设计）。在其他三个设计中，只有一个参数发生了变化。结果表明，新的自动化设计导致了捕捞效率显着下降，由于其较厚的刺绳。使用的鱼钩类型和钓丝长度对渔业效率没有影响。(C)© 2016 Elsevier B.V.版权所有。
This paper describes a method to estimate the relative catch efficiency of different fishing gear designs based on comparison of catch data. This method does not require an equal number of deployments or alternation between gears, but it accounts for multiple competing models describing the data by using multi-model inference. By applying a double bootstrapping procedure, this method also accounts for the uncertainty in the estimation resulting from between-deployment variation in catch efficiency and availability of fish as well as uncertainty about the size structure of the catch for the individual deployments. Finally, by incorporating the multi-model inference into each bootstrap iteration, the method also accounts for the uncertainty due to uncertainty in model selection. Using the described method, we investigated the effect of gear design changes on catch efficiency for a Spanish longline fishery targeting hake (Merluccius merluccius). We tested and compared four different designs against the traditional design used in the fishery. The first was a design compatible with automation that differed from the traditional one in hook size, snood line length, and snood line diameter (new automatized design). In the other three designs, only one of the parameters was changed. The results demonstrated that the new automatized design resulted in a significant decrease in catch efficiency due to its thicker snood line. The hook type and snood line length used had no effect on the efficiency of the fishery. (C) 2016 Elsevier B.V. All rights reserved.