期刊
JOURNAL OF INSECT BEHAVIOR
卷 18, 期 1, 页码 131-148出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10905-005-9352-x
关键词
sperm competition; sexual selection; arthropod; arachnid
类别
We examined the influence of female mating history on copulation behavior and sperm release in the haplogyne spider Tetragnatha versicolor. Despite significant behavioral differences during mating, males released equivalent amounts of sperm to virgin and non-virgin females. When mating with non-virgin females, males showed twice as many pedipalp insertions and half the copulation duration as compared to virgin females; however, males were as likely to mate with non-virgin as virgin females. Even with these overt behavioral differences, males released half of the sperm contained within their pedipalps during mating, regardless of female mating history. With respect to male mating order, first or second, we suggest the numbers of sperm released would lead to an expectation of unbiased paternity. In this species, sperm release is not directly proportional to total copulation duration.
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