On the function of body piercing during copulation in earthworms
On the function of body piercing during copulation in earthworms
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DOI：
10.1080/07924259.2002.9652733
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发表时间：
2002-09-01
影响因子：
0.8
通讯作者：
Michiels, NK
中科院分区：
文献类型：
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作者：
Koene, JM;Sundermann, G;Michiels, NK
在许多生物体中，包括雌雄同体物种，接收到的精子可以被消化或储存。如果它们没有被消化，精子通常会被储存很长时间，在此期间会与多个伴侣发生交配。由于这些过程，性选择倾向于增加捐赠的精子使伴侣的卵子受精的机会的策略。实现这一目标的一种方法是通过转移影响交配伴侣生殖过程的生物活性物质（一种异激素）。雌雄同体的蚯蚓 Lumbricus terrestris 使用 40 根针状刚毛（几丁质毛）将一种物质注射到交配伙伴体内。在交配过程中，这些交配刚毛会刺穿伴侣的皮肤。与正常（爬行）刚毛相比，这些刚毛更长且有凹槽；它们位于第 10、26 和 31 至 38 节（阴蒂节）的腹侧。这种身体穿刺会导致产品从伴随这些刚毛的刚毛腺中注入。我们认为，设定腺可能会产生一种异激素来控制交配伙伴的生殖生理机能。身体穿刺造成的损害和可能失去的受精控制暗示了同时雌雄同体中存在性冲突。
In many organisms, including hermaphroditic species, received sperm can be either digested or stored. If they do not get digested, the sperm are often stored for prolonged periods of time during which copulations with several partners occur. Due to these processes, sexual selection favours tactics that increase the chances of the donated sperm fertilizing the partner's eggs, One way to achieve this is by transferring a bioactive substance (an allohormone) that affects the reproductive processes of the mating partner. The hermaphroditic earthworm Lumbricus terrestris uses 40 needle-like setae (chitinous hairs) to inject a substance into the mating partner. During mating, these copulatory setae are pierced through the partner's skin. Compared to the normal (crawling) setae, these setae are longer and grooved; they are situated ventrally on segments 10, 26, and 31 to 38 (the clitellar segments). This body piercing results in the injection of the product from the setal glands which accompany these setae. We propose that the setal glands may produce an allohormone that manipulates the reproductive physiology of the mating partner. The damage and possible loss of control over fertilization as a result of body piercing hint at the existence of a sexual conflict in simultaneous hermaphrodites.