Precopulatory mate guarding and mating behaviour in the rotifer Epiphanes senta (Monogononta: Rotifera)
Precopulatory mate guarding and mating behaviour in the rotifer Epiphanes senta (Monogononta: Rotifera)
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轮虫 Epiphanes senta 交配前的交配保护和交配行为（Monogononta：轮虫纲）
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
T. Schröder
中科院分区：
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作者：
T. Schröder
Epiphanes森塔是一种沿岸的轮虫，出现在临时沃茨，并显示交配行为，据我所知，迄今为止还没有描述的单殖体轮虫。单殖体轮虫在其生活史中显示出独特的时期，在此期间，混合雌体出现。Mictic女性产生单倍体卵发育成男性或滞育卵，如果受精。E.森塔大多是静止在基板上，而男性是更活跃的游泳者。如果它们遇到带有自己物种雌性胚胎的卵，它们会照顾它们并与孵化中的雌性交配。实验表明，雄性能够区分雄性、雌性和滞育卵。与早期发育阶段的卵相比，它们对离孵化只有几个小时的雌卵表现出强烈的偏好。进一步的实验没有显示出任何显着差异，男性出席的mictic和amictic鸡蛋。据推测，雄性通过感知一种化学物质来判断雌性卵子的年龄，这种化学物质是由成长中的胚胎产生的，并通过蛋壳扩散。雄性的交配行为类似于节肢动物的交配前保护行为，但缺乏雄性对雌性的垄断。
Epiphanes senta is a littoral rotifer species that occurs in temporary waters and displays a mating behaviour which has not, to my knowledge, so far been described for monogonont rotifers. Monogonont rotifers show distinctive periods within their life cycle during which mictic females appear. Mictic females produce haploid eggs that develop into males or into diapausing eggs if fertilized. The females of E. senta are mostly stationary on the substrate while males are more active swimmers. If they encounter eggs with female embryos of their own species, they attend them and mate with the hatching female. Experiments showed that males are able to discriminate between male, female and diapausing eggs. They exhibit a strong preference for female eggs that are only a few hours away from hatching compared with eggs in early developmental stages. Further experiments did not show any significant differences in male attendance of mictic and amictic eggs. It is hypothesized that males judge the age of a female egg by sensing a chemical that is produced by the growing embryo and diffuses through the egg shell. The male mating behaviour is similar to precopulatory mate guarding known from arthropods but it lacks the monopolization of the female by the male.