Hall M D, Bussière L F, Brooks R
Evolution & Ecology Research Centre and School of Biological, Earth & Environmental Sciences, University of New South Wales, Sydney, NSW, Australia.
J Evol Biol. 2009 Apr;22(4):873-81. doi: 10.1111/j.1420-9101.2009.01687.x. Epub 2009 Feb 11.
Theory predicts that lifespan will depend on the dietary intake of an individual, the allocation of resources towards reproduction and the costs imposed by the opposite sex. Although females typically bear the majority of the cost of offspring production, nuptial feeding invertebrates provide an ideal opportunity to examine the extent to which reproductive interactions through gift provisioning impose a cost on males. Here we use experimental evolution in an Australian ground cricket to assess how diet influences male lifespan and how the costs of mating evolve for males. Our findings show that males had significantly shorter lifespans in populations that adapted to a low-quality diet and that this divergence is driven by evolutionary change in how females interact with males over reproduction. This suggests that the extent of sexual conflict over nuptial feeding may be under-realized by focusing solely on the consequences of reproductive interactions from the female's perspective.
理论预测，寿命将取决于个体的饮食摄入、用于繁殖的资源分配以及异性施加的成本。虽然雌性通常承担着后代生产的大部分成本，但有婚前喂食行为的无脊椎动物为研究通过提供礼物进行繁殖互动对雄性造成的成本程度提供了理想机会。在这里，我们利用澳大利亚一种地蟋蟀进行实验进化，以评估饮食如何影响雄性寿命，以及雄性交配成本如何演变。我们的研究结果表明，在适应低质量饮食的种群中，雄性的寿命显著缩短，这种差异是由雌性在繁殖过程中与雄性互动方式的进化变化驱动的。这表明，仅从雌性角度关注繁殖互动的后果，可能无法充分认识到婚前喂食方面的性冲突程度。
