干旱区生态环境知识资源中心(Arid): Low activity levels are an adaptation to desert-living in the Grey Falcon, an endotherm that specializes in pursuing highly mobile prey

Arid

DOI	10.1016/j.jtherbio.2021.103108
	Low activity levels are an adaptation to desert-living in the Grey Falcon, an endotherm that specializes in pursuing highly mobile prey
	Schoenjahn, Jonny; Pavey, Chris R.; Walter, Gimme H.
通讯作者	Schoenjahn, J (corresponding author)，Univ Queensland, Sch Biol Sci, Brisbane, Qld 4072, Australia.
来源期刊	JOURNAL OF THERMAL BIOLOGY
ISSN	0306-4565
EISSN	1879-0992
出版年	2022
卷号	103
英文摘要	Endothermic animals that live permanently in hot deserts must avoid harmful hyperthermia when their body temperature increases from heat gained through external and internal sources. This is true particularly for en-dotherms that are exclusively diurnal. We investigated the Grey Falcon (Falco hypoleucos), a predatory Australian endemic restricted to the hot arid/semi-arid zone. To understand how this species' entire population persists exclusively and permanently in this extreme environment we examined its activity levels and compared these with equivalent variables from the Peregrine Falcon (F. peregrinus), a cosmopolitan species that inhabits similar environments without being restricted to them. Further, we compared, across a selected group of Falco species, specific plumage characteristics (measured on museum specimens) that we anticipated would enhance the Grey Falcons' ability to cope with high heat loads. We found no morphological or physiological characteristics that would allow them to cope with heat better than other birds, but the chicks seem to have unusually high thermal tolerances. Grey Falcons do, however, possess a suite of unusual behavioural adaptations that, as we propose, enable them to cope with climatic extremes in arid environments. Specifically, throughout their lives Grey Falcons keep activity levels and thus physical exertion low. This behaviour contrasts strikingly with that of the Peregrine Falcon, which also actively hunts birds in flight. Keeping activity levels low is expected to minimize endogenous heat production and thus ease the Grey Falcon's thermoregulation during periods of high heat load. These birds may rely on low levels of relative humidity for efficient evaporative cooling, and this may explain their absolute restriction to hot arid/semi-arid zones.
英文关键词	Arid environment Behavioural adaptation Falco hypoleucos Hyperthermia Morphological adaptation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000761097200012
WOS关键词	PEREGRINE FALCONS ; TAITA FALCON ; WORLD MAP ; BIRDS ; THERMOREGULATION ; BEHAVIOR ; WATER ; SELECTION ; ECOLOGY ; FLIGHT
WOS类目	Biology ; Zoology
WOS研究方向	Life Sciences & Biomedicine - Other Topics ; Zoology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376645
作者单位	[Schoenjahn, Jonny; Walter, Gimme H.] Univ Queensland, Sch Biol Sci, Brisbane, Qld 4072, Australia; [Pavey, Chris R.] CSIRO Land & Water, Darwin, NT 0822, Australia
推荐引用方式 GB/T 7714	Schoenjahn, Jonny,Pavey, Chris R.,Walter, Gimme H.. Low activity levels are an adaptation to desert-living in the Grey Falcon, an endotherm that specializes in pursuing highly mobile prey[J],2022,103.
APA	Schoenjahn, Jonny,Pavey, Chris R.,&Walter, Gimme H..(2022).Low activity levels are an adaptation to desert-living in the Grey Falcon, an endotherm that specializes in pursuing highly mobile prey.JOURNAL OF THERMAL BIOLOGY,103.
MLA	Schoenjahn, Jonny,et al."Low activity levels are an adaptation to desert-living in the Grey Falcon, an endotherm that specializes in pursuing highly mobile prey".JOURNAL OF THERMAL BIOLOGY 103(2022).