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首页> 外文期刊>ICES Journal of Marine Science >Exploring new netting material for fishing: the low light level of a luminous netting negatively influences species separation in trawls
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Exploring new netting material for fishing: the low light level of a luminous netting negatively influences species separation in trawls

机译：探索钓鱼新的网状材料：发光网的低光水平负面影响拖网中的物种分离

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摘要

We tested if a newly developed luminous netting, VISIONET, could change the vertical behaviour of six commercially important species in a Nephrops (Nephrops norvegicus) trawl fishery. We inserted a V-shaped piece of VISIONET ascending on each side of the tapered section just ahead of a divided codend. The length-based effect on the vertical separation of fishes and Nephrops was quantified, and we evaluated if the presence of VISIONET had the potential to increase the fish capture in the upper compartment. Contrary to our expectation, gadoids entered the lower compartment more frequently than in the control trawl. This was similar to that previously found when applying green LED lights in the tapered section, however opposite for haddock (Melanogrammus aeglefinus). The flatfishes did not respond. Large Nephrops significantly increased their preference for the lower compartment. Our results show that low intensity light is sufficient to alter the vertical distribution of both fishes and Nephrops. Responses of fishes to different variables, including light intensities, need to be studied in more detail to understand the underlying mechanisms and to ultimately reduce unwanted catch more efficiently. Luminous netting can be integrated in any given trawl design and does not require batteries or electronics.
机译：我们测试了一个新开发的发光网，Visionet，可以在肾脏（Nephrops Norvegicus）拖网渔业中改变六种商业重要物种的垂直行为。我们在锥形部分的每一侧插入了一个V形visionet升，只要在分开的编码。量化了对鱼类和肾的垂直分离的基于长度的影响，我们评估了Visionet的存在是否有可能在上隔室中捕获鱼捕获。与我们的期望相反，毒槽比控制拖网更频繁地进入下部。这类似于先前发现在锥形部分中的绿色LED灯时，然而，对于大鼠（Melanographmus Aeglefinus）相反。扁平鱼没有回应。大肾脏显着增加了对下部隔间的偏好。我们的结果表明，低强度灯足以改变鱼类和肾的垂直分布。需要更详细地研究鱼类对不同变量，包括光强度，以了解潜在的机制，并最终更有效地减少不必要的捕获。发光网可以集成在任何给定的拖网设计中，不需要电池或电子产品。

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