Dataset for: Sensory environment affects Icelandic threespine stickleback's anti-predator escape behaviour

Human-induced changes in climate and habitats push populations to adapt to novel environments, including new sensory conditions, such as reduced visibility. We studied how colonizing newly formed glacial lakes with turbidity-induced low visibility affects anti-predator behaviour in Icelandic threespine sticklebacks. We tested nearly 400 fish from 15 populations and four habitat types varying in visibility and colonization history in their reaction to two predator cues (mechano-visual versus olfactory) in high versus low visibility light treatments. Fish reacted differently to the cues and were affected by lighting environment, confirming that cue modality and light levels are important for predator detection and evasion. Spring-fed fish, especially from the highlands (likely more diverged from marine fish than lowland fish) reacted fastest to mechano-visual cues and were generally most active. Highland glacial fish showed strong responses to olfactory cues and, counter to predictions fr...

人类活动引发的气候与栖息地变化，迫使各类种群适应全新的生存环境，其中包括能见度降低这类全新的感官环境条件。本研究以冰岛三刺棘鱼（threespine sticklebacks）为研究对象，探讨定居于浊度诱导低能见度的新形成冰川湖，如何影响其反捕食行为（anti-predator behaviour）。我们选取了来自15个种群、4类能见度与定殖历史各不相同的生境的近400尾实验个体，在高、低能见度光照处理条件下，测试其对两类捕食者信号——机械视觉（mechano-visual）信号与嗅觉（olfactory）信号——的响应。实验结果显示，鱼类对两类信号的响应存在显著差异，且受光照环境调控，这证实了信号模态与光照水平对于捕食者检测与逃避行为至关重要。泉水补给型生境的鱼类，尤其是高地种群（相较于低地种群，其与海洋鱼类的分化程度可能更高），对机械视觉信号的响应速度最快，且整体活跃度最高。高地冰川湖种群个体对嗅觉信号展现出强烈响应，且其结果与此前的预测……