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DOI10.1111/ibi.12610
Spring migration strategies of Whinchat Saxicola rubetra when successfully crossing potential barriers of the Sahara and the Mediterranean Sea
Blackburn, Emma1,2; Burgess, Malcolm3; Freeman, Benedictus2,4; Risely, Alice5; Izang, Arin2; Ivande, Sam1,2; Hewson, Chris6; Cresswell, Will1,2
发表日期2019
ISSN0019-1019
EISSN1474-919X
卷号161期号:1页码:131-146
英文摘要

The flexibility for migrant land birds to be able to travel long distances rapidly without stopovers, and thus to cross wide inhospitable areas such as deserts and oceans, is likely to be a major determinant of their survival during migration. We measured variation in flight distance, speed and duration of major stopovers (more than 2 days), using geolocator tracks of 35 Whinchats Saxicola rubetra that migrated successfully from central Nigeria to Eastern Europe in spring, and examined how these measures changed, or depended on age, when crossing the barriers of the Sahara or the Mediterranean Sea. In all, 31% of Whinchats crossed at least the Sahara and the Mediterranean before a major stopover and 17% travelled over 4751 km on average without any major stopovers. Flight distance and speed during, and duration of major stopovers after, crossing the Mediterranean Sea were indistinguishable from migration over Continental Europe. Speed during a migration leg was lowest crossing Continental Europe and fastest, with longer duration major stopovers afterwards, when crossing the Sahara, but there was much individual variation, and start date of migration was also a good predictor of stopover duration. As the distance travelled during a leg increased, so major stopover duration afterwards increased (1 day for every 1000 km), but the speed of travel during the leg had no effect. There were no differences in any migration characteristics with age, other than an earlier start date for adult birds. The results suggest that adaptive shortening or even dropping of daily stopovers may occur often, allowing rapid, long-distance migration at the cost of major stopovers afterwards, but such behaviour is not restricted to or always found when crossing barriers, even for birds on their first spring migration. The results may highlight the importance of stopover sites rather than barrier width as the likely key component to successful migration. Individual variation in spring migration may indicate that small passerine migrants like Whinchats may be resilient to future changes in the extent of barriers they encounter, although this may not be true of first autumn migrations or if stopover sites are lost.


WOS研究方向Zoology
来源期刊IBIS
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/91576
作者单位1.Univ St Andrews, Ctr Biol Divers, Harold Mitchell Bldg, St Andrews KY16 9TH, Fife, Scotland;
2.AP Leventis Ornithol Res Inst, Jos, Nigeria;
3.The Lodge, RSPB Ctr Conservat Sci, Sandy SG19 2DL, Beds, England;
4.Fauna & Flora Int, 2 Harmons Compound, Oldest Congo Town, Monrovia, Liberia;
5.Deakin Univ, Ctr Integrat Ecol, Geelong, Vic 3216, Australia;
6.British Trust Ornithol, Thetford IP24 2PU, England
推荐引用方式
GB/T 7714
Blackburn, Emma,Burgess, Malcolm,Freeman, Benedictus,et al. Spring migration strategies of Whinchat Saxicola rubetra when successfully crossing potential barriers of the Sahara and the Mediterranean Sea[J],2019,161(1):131-146.
APA Blackburn, Emma.,Burgess, Malcolm.,Freeman, Benedictus.,Risely, Alice.,Izang, Arin.,...&Cresswell, Will.(2019).Spring migration strategies of Whinchat Saxicola rubetra when successfully crossing potential barriers of the Sahara and the Mediterranean Sea.IBIS,161(1),131-146.
MLA Blackburn, Emma,et al."Spring migration strategies of Whinchat Saxicola rubetra when successfully crossing potential barriers of the Sahara and the Mediterranean Sea".IBIS 161.1(2019):131-146.
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