Fitness differences associated with calling behaviour in the two wing morphs of male sand crickets, Gryllus firmus
Fitness differences associated with calling behaviour in the two wing morphs of male sand crickets, Gryllus firmus
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DOI：
10.1016/0003-3472(95)80004-2
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发表时间：
1995-12-01
期刊：
影响因子：
2.5
通讯作者：
Roff, DA
中科院分区：
文献类型：
--
作者：
Crnokrak, P;Roff, DA
另一种形态存在于广泛的物种中。昆虫的一种常见的二形性是翅膀二形性，其中一个变种有翼(长翼=LW)，能飞，而另一个变种的翅膀减少(微翼=西南)，不能飞。硬毛蟋蟀是一种产于美国东南部的翅型二型性蟋蟀。虽然雌性蟋蟀与翅型二型性有关的权衡已经得到了很好的证实，但这种权衡还没有在雄蟋蟀身上表现出来。在实验室里，用简单的T形迷宫测试了不同形态的雄性金龟子吸引雌性的可能性，雌性在LW雄性和Sw雄性之间进行选择。在成年后的第六天记录每只雄鼠的通话时间。Sw雄性比LW雄性更有可能吸引雌性，并且比LW雄性花更多的时间叫唤。女性选择与男性之间呼叫时间的绝对比例差异的逻辑回归表明，随着男性之间呼叫时间差异的增加，女性选择呼叫时间更长的男性的可能性也增加了。因此，可以得出这样的结论：大羽毛与吸引雌性的可能性之间存在权衡，这可能是雄性坚果维持翅型二型性的一个主要因素。(C)1995年动物行为研究协会
Alternate morphologies exist in a wide range of species. A commonly encountered dimorphism in insects is wing dimorphism, in which one morph is winged (macropterous=LW) and flight-capable while the other has reduced wings (micropterous=SW) and cannot fly. Gryllus firmus is a wing-dimorphic cricket found in the southeastern U.S.A. Although trade-offs associated with wing dimorphism are well established in female crickets, no such trade-offs have been demonstrated in male crickets. Differences between morphs in male G. firmus in the likelihood of attracting a female were tested in the laboratory using a simple T-maze where females chose between an LW male and an SW male. Time spent calling for each male was recorded on the sixth day of adult life. SW males were more likely to attract a female and spent more time calling than LW males. A logistic regression of female choice against the absolute proportional difference in calling time between males revealed that, as the difference in calling time between males increased, the likelihood of a female choosing the longer-calling male also increased. Therefore it is concluded that there is a trade-off between macroptery and the likelihood of attracting a female, and that it may be a primary factor in the maintenance of wing dimorphism in male G. firmus. (C) 1995 The Association for the Study of Animal Behaviour