Flight behaviour attenuates the trade-off between flight capability and reproduction in a wing polymorphic cricket
Flight behaviour attenuates the trade-off between flight capability and reproduction in a wing polymorphic cricket
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DOI：
10.1098/rsbl.2008.0570
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发表时间：
2009-04-23
期刊：
影响因子：
3.3
通讯作者：
Pollack, Gerald S.
中科院分区：
文献类型：
--
作者：
Guerra, Patrick A.;Pollack, Gerald S.
飞行二型昆虫已被广泛用于研究能量消耗性状之间的权衡。个体可以发展和维持飞行所需的结构，或者他们可以投资于繁殖。以前的实验没有研究飞行本身是否会影响繁殖投资。与其他蟋蟀物种一样，翼多态蟋蟀（Gryllus texensis）的具有飞行能力的个体因能够飞行而受到明显的生殖惩罚，表现为雌性卵巢较小，雄性求爱倾向较低，而不是它们的不能飞行的对应物。我们发现，短暂的飞行消除了权衡。飞行后两天，卵巢的飞行能力的女性与短翅的女性。同样地，逃跑也显著地增加了求爱行为的可能性。我们的研究结果表明，早期研究中描述的飞行繁殖权衡的影响可能被高估了。
Flight-dimorphic insects have been used extensively to study trade-offs between energetically costly traits. Individuals may develop and maintain structures required for flight, or alternatively they may invest in reproduction. Previous experiments have not examined whether flight itself might affect investment into reproduction. As in other Gryllus species, flight-capable individuals of the wing polymorphic cricket, Gryllus texensis, incur an apparent reproductive penalty for being able to fly, expressed as smaller ovaries in females and lower courtship propensity in males, than their flight-incapable counterparts. We find that a short bout of flight eliminates the trade-off. Two days after the flight, the ovaries of flight-capable females were comparable with those of short-winged females. Similarly, flight markedly increased the probability of courtship behaviour. Our results suggest that the impact of the flight-reproduction trade-off described in earlier studies may have been overestimated.