Effects of caffeine on mating behavior and sperm precedence in Tribolium castaneum,Ethology

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Effects of caffeine on mating behavior and sperm precedence in Tribolium castaneum
Ethology ( IF 1.3 ) Pub Date : 2020-09-26 , DOI: 10.1111/eth.13094
Ji Yuhao ₁ , Yuki Ryuji ₁ , Kentarou Matsumura ₂ , Takahisa Miyatake ₁

Affiliation

Biogenic amines such as dopamine are physiologically neuroactive substances that affect behavioral and physiological traits in invertebrates, and it has long been known that these substances affect mating behavior in insects. Caffeine is a dopamine activator and thus enhances dopamine receptor activity. However, the effects of caffeine intake on insect mating behavior have been largely unexplored. Therefore, we examined the effect of caffeine on mating behavior in the red flour beetle Tribolium castaneum. Caffeine, which activates dopamine, affected the mating behavior of T. castaneum males. Males who orally ingested caffeine courted faster than males who did not, resulting in faster mounting of females and less time to a male's external aedeagus protrusion. However, the present results showed no difference in sperm precedence measured as a P2 value between males fed caffeine and males not fed caffeine. We discuss the effects of caffeine on insect mating and the possibility that caffeine consumption may cause males to mate with more females in the laboratory.

中文翻译：

咖啡因对白三轮车交配行为和精子优先的影响

多巴胺等生物胺是影响无脊椎动物行为和生理特征的生理神经活性物质，人们早就知道这些物质会影响昆虫的交配行为。咖啡因是一种多巴胺激活剂，因此可以增强多巴胺受体的活性。但是，咖啡因摄入量对昆虫交配行为的影响尚待探索。因此，我们研究了咖啡因对红色面粉甲虫Tribolium castaneum中交配行为的影响。激活多巴胺的咖啡因影响了锥栗的交配行为男性。男性摄入咖啡因的行为比没有摄取咖啡因的男性求爱的速度更快，从而导致女性更快地坐立，并且更少时间接触男性的外部前足突部。但是，目前的结果表明，以咖啡因喂养的男性和未摄取咖啡因的男性之间的P2值测量的精子优先顺序没有差异。我们讨论了咖啡因对昆虫交配的影响以及在实验室中食用咖啡因可能导致雄性与更多雌性交配的可能性。

更新日期：2020-09-26

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