Mating and remating in Coproica vagans (Diptera, Sphaeroceridae)
Mating and remating in Coproica vagans (Diptera, Sphaeroceridae)
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DOI：
10.1080/07924259.2000.9652423
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发表时间：
2000-05-01
影响因子：
0.8
通讯作者：
Lachmann, AD
中科院分区：
文献类型：
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作者：
Lachmann, AD
在粪蝇Coproica van ans Haliday 1833(双翅目，球角蝇科)中，一个坚固但有弹性的交配塞子阻止了交配后雌性生殖器的开口。插头不含精子。精子以团块的形式存在，填满了交配插头前面的阴道。用标记了吖啶橙的雄性进行的实验表明，交配插头是由雄性产生的。交配总是导致塞子的形成。为了补充配种插头生产所需的材料，公牛的配种间隔似乎被调整到了所需的时间。交配插头的两个非排他性功能被提出：交配后将精子保留在阴道中，以及通过防止雌性机械地恢复直到产卵的父子关系来确保父子关系。迷走丝虫交配塞的形状和位置为将精子保留在阴道内，直到精子到达雌性储存器官的能力提供了证据。交配塞子可以防止在阴道内的再次交配。在毛虫交配后，雌性不能与其他雄性发生性行为。机械操纵雌性似乎是这种交配后丧失交配能力的主要原因。交配塞子一直保持不变，直到产卵开始。男性不能诱导插头排出，也不能用生殖器拔出插头。当第一个蛋产下时，交配塞子就会被推出。鸡蛋是分批存放的。交配发生在观察到雌性产卵的那几天，而不是在接下来的几天。在野外，96%的迷走鸟雌性携带交配插头。交配持续时间相当恒定，与雌性交配状态无关。
In the dung fly Coproica vagans Haliday 1833 (Diptera, Sphaeroceridae), a firm but elastic mating plug blocks the female genital opening after copulation. The plug does not contain sperm. Sperm are present in the form of a mass that fills the vagina anterior to the mating plug. Experiments using males marked with acridine orange demonstrated that the mating plug is produced by males. Copulations always resulted in plug formation. Male remating intervals seem to be adjusted to the time needed to replenish the material needed for mating plug production. Two non-exclusive functions of the mating plug are proposed: retention of sperm in the vagina after copulation and paternity assurance by preventing females mechanically from remating until oviposition. Shape and position of the C. vagans mating plug provide evidence for a capability of retaining sperm inside the vagina until sperm reaches the female storage organs. The mating plug prevents remating while it is in the vagina. Following copulation C. vagans females are not sexually available to other males. Mechanical manipulation of females seems to be the main cause for this post-mating loss of ability to copulate. Mating plugs persist unaltered until oviposition begins. Males were not able to induce plug expulsion or remove plugs with their genitalia. The mating plug is pushed out when the first egg is laid. Eggs are deposited in batches. Remating occurred on days when an egg batch laid by that female was observed, never on following days. In the field 96% of C. vagans females carry a mating plug. Copulation duration is fairly constant and is not correlated with female mating status.