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首页> 外文期刊>ICES Journal of Marine Science >Anglerfish catchability for swept-area abundance estimates in a new survey trawl
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Anglerfish catchability for swept-area abundance estimates in a new survey trawl

机译：在新的调查拖网中，鱼的可捕性可用于清扫区域的丰度估计

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摘要

In 2005, a new trawl survey was launched in Scotland to estimate anglerfish (Lophius spp.) abundance using swept-area estimates. This required an understanding of the herding of the fish by the gear, particularly in the zone between the doors and wing ends. TV observations at the wing ends and along the sweeps were used to quantify the behavioural reactions of anglerfish. These observations were analysed to develop a gear efficiency estimate. This paper details the construction of the net and the procedures for data collection on the survey. In all, 54 reliable observations of anglerfish were recorded at the groundgear, the wing ends, and along the sweep/bridle combination. Detailed analysis of the recordings showed that all fish in the path of the net were captured, whereas more than half of the fish between the wings and the doors were not. The fish did not appear to herd and many of the encounters with the wires were passive. An individual-based particle-tracking model was constructed to use the behavioural observations to simulate the capture process and generate an efficiency factor. The calculated efficiency factor, based on the behavioural observations, was 1.04, indicating that almost all fish encountering the sweeps and bridles were lost. The implications and suggestions for development of this work are discussed.
机译：2005年，苏格兰发起了一项新的拖网调查，目的是使用扫描面积估计值来估计angle鱼（Lophius spp。）的丰度。这就需要了解渔具的放牧，特别是在门和翼端之间的区域。机翼末端和扫掠处的电视观测被用来量化angle鱼的行为反应。分析这些观察结果以得出齿轮效率估算值。本文详细介绍了网络的建设以及调查数据的收集程序。总共在地上，机翼末端以及沿后掠/马id组合记录了54个可靠的钓鱼者观察结果。对记录的详细分析表明，网状路径中的所有鱼都被捕获，而机翼和门之间的鱼中有一半以上未被捕获。鱼没有出现在畜群中，与铁丝网的许多接触都是被动的。构建了基于个体的粒子跟踪模型，以使用行为观察来模拟捕获过程并生成效率因子。根据行为观察得出的效率系数为1.04，表明几乎所有遇到fish和sweep的鱼都损失了。讨论了这项工作的意义和建议。

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