Zur Morphologie, Histologie und biologischen Bedeutung der Kopfstrukturen männlicher Zwerspinnen (Linyphiidae: Erigoninae)
Zur Morphologie, Histologie und biologischen Bedeutung der Kopfstrukturen männlicher Zwerspinnen (Linyphiidae: Erigoninae)
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Zur Morphologie, Histologie und biologischen Bedeutung der Kopfstrukturen männlicher Zwerspinnen (Linyphiidae: Erigoninae)
DOI：
10.1016/j.anbehav.2011.11.028
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发表时间：
1986
期刊：
影响因子：
2.5
通讯作者：
H. Paulus
中科院分区：
文献类型：
--
作者：
U. Schaible;C. Gack;H. Paulus
在一些矮小蜘蛛中，雄性蜘蛛有头部的变化，产生雌性在求偶和/或交配时触摸的化学分泌物。我们研究了这些头驼峰分泌物对矮小蜘蛛的求偶、交配概率、交配行为、交配、产卵和父子关系的影响。我们比较了提供分泌物的男性和头部驼峰被实验覆盖的男性之间的这些参数。雌性交配了两次，我们限制每只雄性将触须插入两个受精囊之一的时间为1分钟。因此，相互竞争的雄性精子群以潜在相似的数量被转移到不同的受精囊中。这一设置阻止了精子在受精囊内的直接竞争，并允许我们测试雌性精子的选择性使用。处女更有可能与能够分泌分泌物的雄性交配。当交配发生时，在处女和交配的雌性中，有遮盖驼峰的雄性需要显著更多的插入尝试，并且从第一次接触驼峰到开始精子转移需要更多的时间。在随后的卵囊中，只与具有开放驼峰的雄性交配的雌性卵囊中的卵子数量显著增加，这表明与雄性分泌物一起转移的物质促进了产卵。两种雄性类型的亲子关系没有显着差异，提示腺体产物不会触发雌性对精子的选择。
In some dwarf spiders (Linyphiidae, Erigoninae), males have cephalic modifications that produce chemical secretions that females touch during courtship and/or copulation. We investigated the influence of these cephalic hump secretions on courtship, copulation probability, copulation behaviour, remating, oviposition and paternity in the dwarf spider Oedothorax retusus. We compared these parameters between males that offered secretions and males whose cephalic hump was experimentally covered. Females mated twice and we limited each male to a single 1min insertion of his palp into one of two spermathecae. Thereby, the sperm masses of rival males were transferred into separate spermathecae in potentially similar amounts. This set-up prevented direct sperm competition within a spermatheca and allowed us to test selective sperm usage by the female. Virgin females were more likely to mate with males that were able to release secretions. When copulation occurred, males with a covered hump needed significantly more insertion attempts and required more time from first hump contact to the onset of sperm transfer in both virgin and mated females. The number of eggs in the subsequent eggsac was significantly increased for females that only mated with males with an open hump, indicating that substances transferred with the male secretions promote egg production. Paternity of the two male types was not significantly different suggesting that the gland products do not trigger female choice of sperm.