ABSTRACT While the ability for crayfish to detect visual and chemical cues is well documented, relatively few studies have probed the behavioral responses of crayfish to cues from key predators that they encounter in natural environments. Therefore, we examined how northern crayfish (Faxonius virilis) (Hagen 1870) responded to (1) alarm cues from conspecifics versus chemical cues from smallmouth bass (Micropterus dolomieu) (Lacepéde 1802), (2) varying concentrations of alarm cue from conspecifics, and lastly (3) smallmouth bass visual cues, chemical cues, and a combination of the two. We found that crayfish reduced walking activity in the presence of alarm cues. Chemical cues from smallmouth bass were also capable of eliciting a behavioral response, both alone and when paired with visual cues. Understanding the behavioral mechanisms by which crayfish respond to predatory fish is important to managing freshwater systems in the context of ongoing human- and climate-aided range expansions of both taxa.

中文翻译：

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北方小龙虾（Faxonius virilis）对来自小嘴鲈鱼（Micropterus dolomieu）的同种警报线索和捕食者线索的行为反应

摘要 虽然小龙虾检测视觉和化学线索的能力有据可查，但相对较少的研究探讨了小龙虾对它们在自然环境中遇到的主要捕食者的线索的行为反应。因此，我们研究了北方小龙虾 (Faxonius virilis) (Hagen 1870) 如何响应 (1) 来自同种的警报提示与来自小口黑鲈 (Micropterus dolomieu) (Lacepéde 1802) 的化学提示，(2) 来自同种的不同浓度的警报提示，最后 (3) 小嘴黑鲈视觉线索、化学线索以及两者的结合。我们发现小龙虾在有警报提示的情况下会减少步行活动。来自小口黑鲈的化学线索也能够引发行为反应，无论是单独还是与视觉线索配对时。