卡拉哈里的开杯巢鸟:炎热时期的温度记录仪无法检测到雀形目鸟类的孵化和遮蛋行为

IF 2.6 3区 环境科学与生态学 Q2 ECOLOGY
David Diez-Méndez , Susan J. Cunningham
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引用次数: 0

摘要

由于高气温和太阳辐射,在半干旱或干旱栖息地筑开杯巢的鸟类很难在孵化期间将窝内温度维持在合适的孵化范围内,结果要么导致胚胎死亡,要么导致行为反应以保持窝的存活率。我们研究了在卡拉哈里盆地仅由雌鸟孵化的敞杯筑巢雀鸟南方杓鹬(Lanius collaris)如何分配自理(非孵化期)和孵化(孵化期)的时间,以及该物种以前描述过的遮卵行为是否是炎热时期的普遍反应。我们采用了双重方法,既在巢内安装温度记录仪,又在一天中最热的时段进行行为观察。我们发现,在清晨和傍晚,南飞燕的行为与在温带栖息地孵化的物种类似,都是交替进行 "关闭 "和 "开启 "活动,但在一天中最热的时段,遮阳成为主要活动。行为观察是描述这种行为的关键,表明有必要将不同的数据收集策略结合起来,以成功评估高温环境下开口杯雏鸟的行为。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Open-cup nesters in the Kalahari: Incubation and egg-shading behaviour in passerines cannot be detected with temperature dataloggers during hot periods

Birds that build open-cup nests in semi-arid or arid habitats have difficulty in maintaining clutch temperatures during incubation in a suitable incubation range due to high air temperatures and solar radiation, resulting in either embryo death or behavioural responses to preserve clutch viability. We investigated how Southern Fiscals (Lanius collaris), open-cup nesting passerines with female-only incubation in the Kalahari basin, allocated time for self-care (off-bouts) and incubation (on-bouts) and whether egg shading, a previously described behaviour in this species, is a widespread response during hot periods. We used a dual approach combining temperature dataloggers in the nest and behavioural observations during the hottest hours of the day. We found that in the early morning and late evening, Southern Fiscals behaved similarly to species incubating in temperate habitats by alternating off- and on-bouts, but during the hottest hours of the day, shading became the main activity. Behavioural observations were key to describing this behaviour indicating that it is necessary to combine different data collection strategies to successfully assess the behaviour of open-cup nesters in hot environments.

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来源期刊
Journal of Arid Environments
Journal of Arid Environments 环境科学-环境科学
CiteScore
5.70
自引率
3.70%
发文量
144
审稿时长
55 days
期刊介绍: The Journal of Arid Environments is an international journal publishing original scientific and technical research articles on physical, biological and cultural aspects of arid, semi-arid, and desert environments. As a forum of multi-disciplinary and interdisciplinary dialogue it addresses research on all aspects of arid environments and their past, present and future use.
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