The diel activity of crucian carp, Carassius carassius, in relation to chemical cues from predators
The diel activity of crucian carp, Carassius carassius, in relation to chemical cues from predators
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DOI：
10.1023/a:1011073518350
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发表时间：
2001-07-01
影响因子：
1.4
通讯作者：
Nilsson, K
中科院分区：
文献类型：
--
作者：
Pettersson, LB;Andersson, K;Nilsson, K
来自食鱼性鱼类和猎物警报物质的化学线索通常会在猎物中引起快速的惊吓反应。然而，关于与鱼类有关的化学线索如何在超过几个小时的时间内影响猎物行为，人们知之甚少。在这里，我们研究了来自食鱼性北方狗鱼esox Lucius的化学线索如何在11天的延长时间内影响鲫鱼的栖息地选择和摄食活动。在实验开始时，对照鱼是夜间活动的，而梭鱼线索处理组的鱼是非周期性的。11天后，对照鱼的夜间活动变得更加强烈，并在清晨和深夜出现两个活动高峰，而梭鱼线索处理组的鱼仍然是非周期性的，没有活动高峰。在整个实验过程中，两个处理的栖息地选择都是非周期性的。在两个处理中，在植被带发现的鱼比在开阔栖息地发现的更多。当有梭鱼提示时，这一点最为明显。这些结果表明，捕食者对捕食者化学暗示的短期反捕食者反应可以转化为对昼夜周期的长期调整。此外，这些结果并不支持鲫鱼应该在夜间活动以回应视觉捕食者的观点。对照鱼是夜间活动的，而来自梭鱼的化学信号并没有使这种模式更加明显。
Chemical cues from piscivorous fish and prey alarm substances often cause rapid fright responses in prey. However little is known of how piscivore-related chemical cues affect prey behaviour over periods longer than a few hours. Here we have investigated how chemical cues from piscivorous northern pike, Esox lucius, affect habitat choice and diel activity of crucian carp, Carassius carassius, over an extended period 11 days. At the beginning of the experiment control fish were nocturnal while fish in the pike cue treatment were aperiodic. After 11 days, control fish had become more strongly nocturnal and displayed two activity peaks during early and late night whereas fish in the pike cue treatment were still aperiodic with no activity peaks. Habitat choice was aperiodic in both treatments throughout the experiment. In both treatments, more fish were found in the vegetation zone than in the open habitat. This was most pronounced when pike cues were present. These results demonstrate that short-term anti-predator responses to chemical cues from predators can translate into long-term adjustments of diel periodicity. Further, the results did not support the idea that crucian carp should switch to nocturnal activity in response to visually hunting predators. Control fish were nocturnal and chemical cues from pike did not make this pattern more pronounced.