排序方式: 共有22条查询结果,搜索用时 15 毫秒
21.
W. Hartner F. L. Boschke J. Giesecke W. Bühler V. Gerold J. Brandmüller H. A. Bent D. Reinen K. Heyns G. Köbrich J. L. Margrave J. J. Eisch J. R. Blair-West L. Jaenicke F. Neumann W. Wickler H. Mohr H. Haeupler R. Dietz O. Prokop R. Strässle E. Kuhn-Schnyder 《Die Naturwissenschaften》1972,59(7):319-324
22.
We examined the influence of female feeding regime on polyandry in the nuptially feeding nursery web spider (Pisaura mirabilis). In this species, the nuptial gift, a dead prey item wrapped in the male’s silk, is physically separate from the ejaculate.
We manipulated female feeding regime (starved or fed) and the presence or absence of a gift with three successive males to
test direct-benefits hypotheses (nuptial gift or sperm supply) for the expression of polyandry. The presence of a gift was
necessary for copulation, as no male without a gift successfully copulated. Female mating behavior most strongly supports
polyandry due to the accumulation of gifted food items (“nuptial gift” direct-benefits hypothesis). Starved females that were
presented with a gift accepted significantly more gifts and inseminations than fed females. Most starved females (74%) copulated
two or more times, as opposed to only 3% of the fed females. Nearly all of the females that accepted a gift subsequently copulated.
The nuptial gift item seems to function as male mating effort and females appear to receive multiple matings as part of a
feeding strategy. 相似文献