Balancing risk and reward: mating opportunity influences thermal refuge use in fiddler crabs
Balancing risk and reward: mating opportunity influences thermal refuge use in fiddler crabs
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DOI：
10.1016/j.anbehav.2020.08.013
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发表时间：
2020-11-01
期刊：
影响因子：
2.5
通讯作者：
Lane, Zachary M.
中科院分区：
文献类型：
--
作者：
Darnell, M. Zachary;Yeghissian, Talene G.;Lane, Zachary M.
行为体温调节可以缓解热应激，但成本高昂。对于在热应激微生境中求爱的物种来说，通过耐力竞争进行的性选择有利于那些能够并且愿意忍受求偶栖息地恶劣条件的个体，因为撤退到热避难所会减少交配机会。面对热风险时，使用避难所与继续求爱的相对成本和收益在非生物和生物环境中有所不同，决定了最佳行为策略。我们研究了影响招潮蟹 Austruca mjoebergi 体温调节退缩相关行为决策的社会和非生物因素。雄性招潮蟹在热应激的潮间带沉积物表面进行求偶表演。表面上的时间以及可用于显示的时间受到高温的限制；随着温度升高，表面时间减少。然而，当雌性受到刺激时，雄性更有可能进行求爱展示，展示频率更高，并且在水面上花费的时间更长。这些结果表明，与热退缩相关的行为决策既取决于影响热应激程度的非生物条件，也取决于影响个体生殖前景的社会条件。 (C) 2020 动物行为研究协会。由爱思唯尔有限公司出版。保留所有权利。
Behavioural thermoregulation can ameliorate thermal stress but is costly. For species that court in a thermally stressful microhabitat, sexual selection via endurance rivalry favours individuals that are able and willing to endure harsh conditions in the courtship habitat, as retreats to a thermal refuge will reduce mating opportunities. The relative costs and benefits of refuge use versus continued courtship in the face of thermal risk, which vary across abiotic and biotic contexts, determine the optimal behavioural strategy. We examined the social and abiotic factors driving behavioural decisions related to thermoregulatory retreat in the fiddler crab Austruca mjoebergi. Male fiddler crabs perform a courtship display on the thermally stressful intertidal sediment surface. Time on the surface, and thus time available for display, was limited by high temperatures; as temperature increased, surface time decreased. Yet when presented with a stimulus female, males were more likely to perform the courtship display, displayed at a higher rate and increased time spent on the surface. These results demonstrate that behavioural decisions related to thermal retreat depend both on the abiotic conditions that influence the degree of thermal stress and on the social conditions that influence the reproductive prospects of the individual. (C) 2020 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.