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DOI	10.1093/beheco/arae001
	Lunar synchrony, geography, and individual clocks shape autumn migration timing in an avian migrant
	Korpach, Alicia M.; Davy, Christina M.; Mills, Alex M.; Fraser, Kevin C.
发表日期	2024
ISSN	1045-2249
EISSN	1465-7279
起始页码	35
结束页码	2
卷号	35 期号:2
英文摘要	Timing programs in animal migrants have been selected to synchronize movements that coincide with predictable resources on the breeding and nonbreeding grounds. Migrants face potential temporal conflicts if their migration schedules benefit from synchrony to conflicting rhythms associated with annual biogeographical (circannual) cues, lunar (circalunar) cues, or individually repeatable internal clocks. We repeat-tracked individuals of an avian lunaphilic species, Eastern Whip-poor-will (Antrostomus vociferus), for two to three successive autumn migrations to determine the influence of the lunar cycle, breeding location, and individual repeatability on migration timing. Almost all birds avoided departing for migration during a full moon, likely to take advantage of the bright moonlight to facilitate visual foraging and enhance pre-migration fattening. However, groups from two latitudinally distant sampling areas adjusted their autumn departure timing differently relative to the timing of the September full moon, presumably due to differences in seasonal prey availability. Individual repeatability increased throughout autumn migration, suggesting that the factors responsible for shaping migration timing may differ for different migration stages. Our results, that lunar synchrony, local climate, and individual internal clocks appeared to account for much of the variation in migration timing in whip-poor-wills, underscore the value of measuring potentially interacting factors that shape migratory behavior at species, group, and individual levels. It remains unclear if, or how, maintaining individually repeatable annual migration schedules provides an adaptive benefit for whip-poor-wills or other lunaphilic migrants. Further clarifying the reasons for phenotypic variation in whip-poor-will migration timing will improve predictions of their abilities to adjust migratory movements under changing environmental conditions. Lunaphilic (moon-loving) birds have time-management challenges when they prepare for their long-distance migrations. We show that Eastern Whip-poor-wills avoid departing for migration during a full moon, likely to maximize moonlight-enhanced foraging benefits during this time. However, exactly when they leave also depends on where they live and the tendency for individual birds to have relatively consistent timing from one year to the next. Determining the relative influence of multiple factors on individuals, groups, and the entire species increases our understanding of the underlying causes of migration timing schedules and their potential flexibility.
英文关键词	migration phenology; internal clock; lunar synchrony; nightjar; Antrostomus; repeatability
语种	英语
WOS研究方向	Behavioral Sciences ; Life Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology ; Zoology
WOS类目	Behavioral Sciences ; Biology ; Ecology ; Zoology
WOS记录号	WOS:001148281800002
来源期刊	BEHAVIORAL ECOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305581
作者单位	University of Manitoba; Carleton University; York University - Canada
推荐引用方式 GB/T 7714	Korpach, Alicia M.,Davy, Christina M.,Mills, Alex M.,et al. Lunar synchrony, geography, and individual clocks shape autumn migration timing in an avian migrant[J],2024,35(2).
APA	Korpach, Alicia M.,Davy, Christina M.,Mills, Alex M.,&Fraser, Kevin C..(2024).Lunar synchrony, geography, and individual clocks shape autumn migration timing in an avian migrant.BEHAVIORAL ECOLOGY,35(2).
MLA	Korpach, Alicia M.,et al."Lunar synchrony, geography, and individual clocks shape autumn migration timing in an avian migrant".BEHAVIORAL ECOLOGY 35.2(2024).