Cross Fiona R, Jackson Robert R
School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand, Telephone: +64 3 364 2987, ext. 7068, Fax number: +64 3 364 2590. International Centre of Insect Physiology and Ecology (ICIPE), Thomas Odhiambo Campus, P.O. Box 30, Mbita Point, Kenya.
Ethology. 2014 Jun 1;120(6):598-606. doi: 10.1111/eth.12232.
One of the predictions from evolutionary game theory is that individuals will increase their willingness (i.e., become primed) to escalate aggression when they detect the presence of a limiting resource. Here we test this prediction in the context of prey odour priming escalation decisions during vision-based encounters by . This East African jumping spider (Salticidae) feeds indirectly on vertebrate blood by actively choosing blood-carrying female mosquitoes as preferred prey. Unlike many salticid species, it also expresses pronounced mutual mate choice. As predicted, we show here that, in the presence of odour from their preferred prey, both sexes of escalate during vision-based same-sex encounters. This is further evidence that the odour of blood-carrying mosquitoes is salient to this salticid. For both sexes of , this particular prey may be a resource that matters in the context of intrasexual selection.
进化博弈论的一个预测是，当个体察觉到有限资源的存在时，他们会更愿意（即做好准备）升级攻击行为。在此，我们在东非跳蛛基于视觉的相遇过程中，检验猎物气味引发升级决策这一预测。这种东非跳蛛（跳蛛科）通过主动选择携带血液的雌性蚊子作为首选猎物，间接以脊椎动物的血液为食。与许多跳蛛物种不同，它还表现出明显的相互配偶选择。正如预测的那样，我们在此表明，在存在其首选猎物气味的情况下，东非跳蛛的两性在基于视觉的同性相遇中都会升级攻击行为。这进一步证明，携带血液的蚊子的气味对这种跳蛛来说很突出。对东非跳蛛的两性而言，这种特定猎物可能是在同性选择背景下至关重要的一种资源。
