Male mate choice and size-assortative pairing in a jumping spider, Phidippus clarus
Male mate choice and size-assortative pairing in a jumping spider, Phidippus clarus
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DOI：
10.1016/j.anbehav.2006.10.017
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发表时间：
2007-06-01
期刊：
影响因子：
2.5
通讯作者：
Hoefler, Chad D.
中科院分区：
文献类型：
--
作者：
Hoefler, Chad D.
男性的选择正受到生物学家更多的关注，但与女性选择的调查相比，研究仍然不足。我研究了跳蛛Phidippus clarus的雄性选择及其在大小配对中的潜在作用。成年雄性在未成熟的雌性成熟前不久与它们同居并守护它们。在此期间，我监测的性别比例和成熟率的女性在。在这一领域，由于这些参数会影响有利于男性选择的条件。成虫性比最初偏向雄性，在相对同步的雌性成熟期后变成偏向雌性。我从田野里收集了一对公母狗发现它们的胫骨长度与大小成正比。然后，我用胫骨长度作为衡量大小的标准，测试雄性是否能通过大小区分雌性。无论是小的和大的男性更喜欢与大的女性，成熟早于小的女性，成熟晚。男性也歧视女性时，只暴露于女性的丝绸巢，这表明与丝绸相关的线索传达信息的成熟和胫骨长度，两个字符高度负相关。最后，大的男性更有可能在男性与男性的比赛中击败小的男性，随着参赛者之间的大小差距增加，较大的个体获胜的可能性也增加了。雄性对体型较大的雌性的偏好加上雄性在雄性竞争中的巨大优势，可能会强烈影响体型竞争配对。已知的交配或配对的物种可能对雄性选择的研究很有价值。(C)2007年，动物行为研究协会。由爱思唯尔有限公司出版。保留所有权利。
Male choice is receiving greater attention from biologists, but remains understudied compared to investigations of female choice. I studied male choice and its potential role in size-assortative pairing in the jumping spider Phidippus clarus. Adult males cohabit with and guard immature females shortly before they mature. During this period, I monitored the sex ratio and maturation rate of females in the. field, because these parameters can influence conditions favouring male choice. The adult sex ratio was initially male biased and became female biased following a relatively synchronous female maturation period. I collected male-female pairs from the field and found that they were size- assortatively paired for tibia length. I then tested whether males could discriminate between females by size, using tibia length as a measure of size. Both small and large males preferred to pair with large females that matured sooner compared with small females that matured later. Males also discriminated between females when exposed only to female silken nests, suggesting that cues associated with silk convey information about maturation and tibia length, two characters that were highly inversely correlated. Finally, large males were more likely to defeat small males in male-male contests, and as the size disparity between contestants increased, the likelihood that the larger individual would win also increased. A male preference for larger females combined with a large male advantage in male-male contests is likely to strongly influence size- assortative pairing. Species that are known to mate or pair assortatively may be valuable for studies of male choice. (C) 2007 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.