High air temperatures induce temporal, spatial and social changes in the foraging behaviour of wild zebra finches
High air temperatures induce temporal, spatial and social changes in the foraging behaviour of wild zebra finches
复制标题
DOI：
10.1016/j.anbehav.2019.01.004
复制
发表时间：
2019-03-01
期刊：
影响因子：
2.5
通讯作者：
Griffith, Simon C.
中科院分区：
文献类型：
--
作者：
Funghi, Caterina;McCowan, Luke S. C.;Griffith, Simon C.
鉴于气候变化，了解热浪如何影响生物体正成为动物行为中的一个重要问题。暴露在高气温下会导致致命的体温过高，当个人不再能够将体温保持在其最佳生理范围内时。动物会迅速调整自己的行为，通过饮酒和坐在阴凉处等活动来优先考虑散热，以保持体温，而不是其他活动，如觅食。在这里，我们使用自动记录系统来考虑在不同的气温范围内的个体水平下的空间和时间觅食模式，在一个严格的野生稻草类物种中。我们连续监测野生斑马雀的个体觅食活动，这是一种很好地适应干旱条件的物种，在澳大利亚干旱地区经历了两次热浪事件。高温显著减少了觅食活动，这种影响的程度取决于一天中的不同时间。它们还导致一起觅食的鸟类数量显著减少，鸟类在接近供水的情况下觅食活动的比例更高。当气温超过35摄氏度时，我们看到散热行为显著升级。我们的结果表明，极端气温显著影响斑雀觅食行为的时间、社会和空间特征，这可能会在短期内不利地降低个体有效觅食的能力，从而降低其食物摄入量，同时也可能对繁殖和长期生存产生影响。皇冠版权(C)2019由爱思唯尔有限公司代表动物行为研究协会出版。版权所有。
Understanding how heatwaves affect organisms is becoming an important issue in animal behaviour, given the changing climate. Exposure to high air temperatures can lead to lethal hyperthermia, when individuals are no longer able to maintain body temperature within their optimal physiological range. Animals will rapidly adjust their behaviour, prioritizing heat dissipation through activities such as drinking and sitting in shade to maintain their body temperature over other activities, such as foraging. Here, we used an automated logging system to consider both the spatial and temporal foraging patterns under a range of different air temperatures at an individual level, in a strictly granivorous species in the wild. We continuously monitored individual foraging activity of wild zebra finches, Taeniopygia guttata, a species well adapted to arid conditions, in an Australian arid area across two heatwave events. High air temperatures significantly reduced foraging activity, with the extent of this effect depending on the time of day. They also led to a significant decrease in the number of birds foraging together and to birds spending a higher proportion of their foraging activity close to a water supply. As temperatures exceeded 35 degrees C we saw a significant escalation of heat dissipation behaviour. Our results indicate that extreme air temperatures significantly affected temporal, social and spatial characteristics of zebra finch foraging behaviour and these are likely to adversely reduce an individual's capacity to forage efficiently, and consequently its food intake in the short term, while also potentially having implications for both reproduction and survival in the long term. Crown Copyright (C) 2019 Published by Elsevier Ltd on behalf of The Association for the Study of Animal Behaviour. All rights reserved.