Environmental Deterioration Compromises Socially Enforced Signals of Male Quality in Three‐Spined Sticklebacks
Environmental Deterioration Compromises Socially Enforced Signals of Male Quality in Three‐Spined Sticklebacks
复制标题
环境恶化损害了三刺鱼雄性品质的社会强制信号
DOI：
--
复制
发表时间：
2007
影响因子：
2.9
通讯作者：
K. Lindström
中科院分区：
文献类型：
--
作者：
B. Wong;U. Candolin;K. Lindström
社会成本在促进性选择特征的诚实方面往往很重要。那么，当社会成本降低时会发生什么呢？在浅水沿海沃茨繁殖的物种中，浮游植物大量繁殖的频率和严重程度的增加可能会通过降低能见度来破坏视觉信号的价值，并且，这样做，通过放松对低质量个体的高信号努力的社会后果，导致不诚实的信号。在这里，我们通过实验测试藻类诱导的水浊度对雄性-雄性竞争在促进三棘鱼可靠的性表现中的作用的影响。我们发现，男性在恶劣的条件下减少了他们的求爱努力在浑浊的水竞争的存在。然而，这种减少的程度比在清水中观察到的要小得多。因此，在藻类浑浊的条件下的求偶并不像在清水中的求偶那样诚实地反映雄性的状况。藻类浑浊度也影响繁殖着色，与男性在恶劣的条件下减少其红色的婚礼着色在浑浊的条件。我们的研究结果表明，人为干扰的信号环境可能会降低进化潜力的性选择，通过减少视觉显示的功效和削弱社会强制信号的男性质量。
Social costs are often important in promoting the honesty of sexually selected traits. What happens, then, when social costs are relaxed? In species that breed in shallow coastal waters, increases in the frequency and severity of phytoplankton blooms may undermine the value of visual signals by reducing visibility and, in so doing, lead to dishonest signaling by relaxing the social consequences of high signaling effort for poor‐quality individuals. Here, we experimentally test the effects of algally induced water turbidity on the role of male‐male competition in facilitating reliable sexual displays in three‐spined sticklebacks. We found that males in poor condition reduced their courtship effort in the presence of competition in turbid water. This reduction, however, was to a much lesser extent than that observed in clear water. Thus, courtship under conditions of algal turbidity did not reflect male condition as honestly as courtship in clear water. Algal turbidity also influenced breeding coloration, with males in poor condition reducing their area of red nuptial coloration in turbid conditions. Our findings suggest that anthropogenic disturbance to the signaling environment can potentially reduce the evolutionary potential of sexual selection by diminishing the efficacy of visual displays and weakening socially enforced signals of male quality.