UMR 6553 ECOBIO, Université de Rennes I, Campus de Beaulieu, Avenue du Général Leclerc, 35 042 Rennes cedex, France.
J Theor Biol. 2012 Sep 21;309:67-77. doi: 10.1016/j.jtbi.2012.06.005. Epub 2012 Jun 20.
Temperature increase can affect physiological and behavioural constraints. Here, we use a stochastic dynamic modelling approach to predict changes in physiological adaptations and behaviour in response to temperature increase of pro-ovigenic parasitoids (i.e., parasitoids that mature all of their eggs before emergence). Adults of most species of parasitoids, are not capable of de novo lipogenesis. The allocation of lipids accumulated during the larval stage determines adult lifespan and fecundity. In females, lipids can be allocated either to egg production or to adult lipid reserves leading to a trade-off between fecundity and lifespan. Our results show that selection by an increase in ambient temperature, favours a smaller initial egg load and a larger amount of lipids for maintenance. The cost of habitat exploitation increases with temperature because the rate of lipid consumption increases. Hence, lifetime reproductive success decreases. When the optimal activity rate shifts to match the higher ambient temperature, these effects become less pronounced.
温度升高会影响生理和行为限制。在这里，我们使用随机动态建模方法来预测产卵期寄生蜂（即成熟所有卵子后才出蜂的寄生蜂）对温度升高的生理适应和行为变化。大多数寄生蜂种类的成虫不具备从头合成脂肪的能力。幼虫期积累的脂肪分配决定成虫的寿命和繁殖力。在雌性中，脂肪可以分配到产卵或成虫脂肪储备中，从而在繁殖力和寿命之间产生权衡。我们的研究结果表明，环境温度升高的选择有利于较小的初始卵负荷和更大的维持脂质量。由于脂质消耗率增加，栖息地利用的成本随温度升高而增加。因此，终生繁殖成功率降低。当最佳活动率适应更高的环境温度时，这些影响变得不那么明显。
