Arid
DOI10.1111/ibi.12258
High juvenile mortality during migration in a declining population of a long-distance migratory raptor
Oppel, Steffen1; Dobrev, Vladimir2; Arkumarev, Volen2; Saravia, Victoria3; Bounas, Anastasios3,4; Kret, Elzbieta5; Velevski, Metodija6; Stoychev, Stoycho2; Nikolov, Stoyan C.2
通讯作者Oppel, Steffen
来源期刊IBIS
ISSN0019-1019
EISSN1474-919X
出版年2015
卷号157期号:3页码:545-557
英文摘要

Many populations of long-distance migrants are declining and there is increasing evidence that declines may be caused by factors operating outside the breeding season. Among the four vulture species breeding in the western Palaearctic, the species showing the steepest population decline, the Egyptian Vulture Neophron percnopterus, is a long-distance migrant wintering in Africa. However, the flyways and wintering areas of the species are only known for some populations, and without knowledge of where mortality occurs, effective conservation management is not possible. We tracked 19 juvenile Egyptian Vultures from the declining breeding population on the Balkan Peninsula between 2010 and 2014 to estimate survival and identify important migratory routes and wintering areas for this species. Mortality during the first autumn migration was high (monthly survival probability 0.75) but mortality during migration was exclusively associated with suboptimal navigation. All birds from western breeding areas and three birds from central and eastern breeding areas attempted to fly south over the Mediterranean Sea, but only one in 10 birds survived this route, probably due to stronger tailwind. All eight birds using the migratory route via Turkey and the Middle East successfully completed their first autumn migration. Of 14 individual and environmental variables examined to explain why juvenile birds did or did not successfully complete their first migration, the natal origin of the bird was the most influential. We speculate that in a declining population with fewer experienced adults, an increasing proportion of juvenile birds are forced to migrate without conspecific guidance, leading to high mortality as a consequence of following sub-optimal migratory routes. Juvenile Egyptian Vultures wintered across a vast range of the Sahel and eastern Africa, and had large movement ranges with core use areas at intermediate elevations in savannah, cropland or desert. Two birds were shot in Africa, where several significant threats exist for vultures at continental scales. Given the broad distribution of the birds and threats, effective conservation in Africa will be challenging and will require long-term investment. We recommend that in the short term, more efficient conservation could target narrow migration corridors in southern Turkey and the Middle East, and known congregation sites in African wintering areas.


英文关键词Balkan peninsula feedback loop Movebank navigation satellite telemetry vulture
类型Article
语种英语
国家England ; Bulgaria ; Greece ; Macedonia
收录类别SCI-E
WOS记录号WOS:000356700500010
WOS关键词VULTURES NEOPHRON-PERCNOPTERUS ; AUTUMN MIGRATION ; SATELLITE TELEMETRY ; SOCIAL INTERACTIONS ; HABITAT SELECTION ; RANDOM FORESTS ; BIRD ; SURVIVAL ; MIGRANTS ; WIND
WOS类目Ornithology
WOS研究方向Zoology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/187775
作者单位1.Royal Soc Protect Birds, RSPB Ctr Conservat Sci, Sandy SG19 2DL, Beds, England;
2.Bulgarian Soc Protect Birds BirdLife Bulgaria, Sofia, Bulgaria;
3.Hellen Ornithol Soc, Athens, Greece;
4.Univ Ioannina, Dept Biol Applicat & Technol, GR-45110 Ioannina, Greece;
5.WWF Greece, Athens, Greece;
6.Macedonian Ecol Soc, Skopje, Macedonia
推荐引用方式
GB/T 7714
Oppel, Steffen,Dobrev, Vladimir,Arkumarev, Volen,et al. High juvenile mortality during migration in a declining population of a long-distance migratory raptor[J],2015,157(3):545-557.
APA Oppel, Steffen.,Dobrev, Vladimir.,Arkumarev, Volen.,Saravia, Victoria.,Bounas, Anastasios.,...&Nikolov, Stoyan C..(2015).High juvenile mortality during migration in a declining population of a long-distance migratory raptor.IBIS,157(3),545-557.
MLA Oppel, Steffen,et al."High juvenile mortality during migration in a declining population of a long-distance migratory raptor".IBIS 157.3(2015):545-557.
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