Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
In commercial trawl fisheries in the North Pacific and US West Coast, fishermen and scientists are evaluating if artificial lights facilitate escapement of bycaught Chinook salmon (Oncorhynchus tshawytscha) from the trawl by attracting them to an opening provided by a bycatch reduction device. Inconsistent behaviour and escapement rates when lights were used in the trawl led us to conduct a laboratory study to evaluate the role of light properties (intensity, colour, and strobe) on marine Chinook salmon behaviour. Results from this study suggest a negative phototactic response. Light colour and strobe, and the interaction between them, differentially affected behavioural response with regard to mean swimming speed and distance from and habituation to the light. White light intensity had limited influence on response; however, the range of trialed intensities was limited. While behaviour is contextual and responses in a laboratory setting cannot be directly extrapolated to responses in fishing gear, this study highlights the significant role of light properties when trying to affect behaviour for bycatch mitigation and the importance of distinguishing between a response to light and to illuminated surroundings.

中文翻译：

---

评估奇努克鲑鱼 (Oncorhynchus tshawytscha) 对人造光的反应以支持减少兼捕

加拿大渔业和水生科学杂志，印刷前。
在北太平洋和美国西海岸的商业拖网渔业中，渔民和科学家正在评估人造光是否有助于通过将兼捕减少装置提供的开口吸引兼捕的奇努克鲑鱼（Oncorhynchus tshawytscha）从拖网中逃脱。拖网中使用灯光时的不一致行为和逃逸率导致我们进行了一项实验室研究，以评估灯光特性（强度、颜色和频闪）对海洋奇努克鲑鱼行为的作用。这项研究的结果表明负趋光反应。光色和频闪，以及它们之间的相互作用，对平均游泳速度、距离和习惯于光的行为反应产生不同的影响。白光强度对反应的影响有限；然而，试验强度的范围是有限的。虽然行为是上下文相关的，实验室环境中的反应不能直接外推到渔具的反应，但本研究强调了光特性在试图影响兼捕减少行为时的重要作用，以及区分对光和照明的反应的重要性周围环境。