Biology Centre of the Czech Academy of Sciences, Institute of Hydrobiology, České Budějovice, Czech Republic.
Biology Centre of the Czech Academy of Sciences, SOWA, České Budějovice, Czech Republic.
Sci Rep. 2018 Oct 18;8(1):15377. doi: 10.1038/s41598-018-33615-4.
Animals that do not provide parental care have to secure the survival of their offspring by ensuring a safe reproductive environment or smart timing tactics. Nocturnal spawning behaviour of many fish species is an example of the latter behaviour in the animal kingdom and is hypothesized to provide a survival advantage to the eggs spawned during the night. In order to test the efficiency of the smart timing tactics in a freshwater fish, a study was carried out of the interaction of the rheophilic spawner (asp Leuciscus aspius) and the predator of its drifting eggs (bleak Alburnus alburnus) using passive telemetry. According to a model based on acquired data, asp laid 63% of its eggs at night, while vision-oriented bleak was present in 92% of the time during the day. This study gives support to the predator avoidance hypothesis, which expects animals to reproduce in a period when the probability of offspring predation is at its lowest.
不提供亲代照顾的动物必须通过确保安全的生殖环境或明智的时间策略来确保其后代的生存。许多鱼类的夜间产卵行为就是动物王国中后者的一个例子，这种行为被假设为夜间产卵的卵提供了生存优势。为了测试淡水鱼类中这种明智的时间策略的效率，一项使用被动遥测技术研究了喜流水产卵的 asp（Leuciscus aspius）和其漂流卵的捕食者（bleak Alburnus alburnus）之间相互作用的研究。根据基于获得的数据的模型，asp 有 63%的卵是在夜间产下的，而视觉导向的 bleak 在白天 92%的时间都存在。这项研究支持了捕食者回避假说，该假说预计动物会在其后代被捕食的概率最低的时期繁殖。
