Age-related timing of Short-toed Snake Eagle Circaetus gallicus migration along detoured and direct flyways. Issue 1 (2nd January 2017)
- Record Type:
- Journal Article
- Title:
- Age-related timing of Short-toed Snake Eagle Circaetus gallicus migration along detoured and direct flyways. Issue 1 (2nd January 2017)
- Main Title:
- Age-related timing of Short-toed Snake Eagle Circaetus gallicus migration along detoured and direct flyways
- Authors:
- Agostini, Nicolantonio
Baghino, Luca
Vansteelant, Wouter M.G.
Panuccio, Michele - Abstract:
- ABSTRACT: Capsule: Juvenile Short-toed Snake Eagles Circaetus gallicus hatching in the peripheral populations of Greece and Italy have limited opportunities for social learning of migration routes compared to those hatched elsewhere. Aims: To test the prediction that there would be a higher degree of migration synchrony between adult and juvenile Short-toed Snake Eagles originating from peripheral populations and using an extremely detoured flyway, when compared to other populations using a direct overland flyway. Methods: We use linear regression models to compare seasonal changes in the age distribution of migrating Short-toed Snake Eagles counted at two migration watch-sites in Italy (Arenzano) and Georgia (Batumi), along a detoured and a direct flyway, respectively. Results: Juveniles migrated a few days later than adults at both sites and the age ratios recorded at these two sites was similar. The daily proportion of juveniles increased along a similar slope during the migration season, thus showing a similar degree of synchrony between the age classes on both flyways. Conclusions: Contrary to our hypothesis, juvenile and adult migration is not more synchronized in peripheral populations using a detoured flyway compared to a core population using a direct migration flyway. Our results suggest that juveniles do not learn detours to complete trans-Mediterranean migration from their parents, but from other elders.
- Is Part Of:
- Bird study. Volume 64:Issue 1(2017)
- Journal:
- Bird study
- Issue:
- Volume 64:Issue 1(2017)
- Issue Display:
- Volume 64, Issue 1 (2017)
- Year:
- 2017
- Volume:
- 64
- Issue:
- 1
- Issue Sort Value:
- 2017-0064-0001-0000
- Page Start:
- 37
- Page End:
- 44
- Publication Date:
- 2017-01-02
- Subjects:
- Birds -- Ecology -- Great Britain -- Periodicals
Birds -- Conservation -- Great Britain -- Periodicals
Birds -- Ecology -- Periodicals
Birds -- Conservation -- Periodicals
Birds -- Great Britain -- Periodicals
Birds -- Geographical distribution -- Periodicals
Birds -- Counting -- Periodicals
598.170941 - Journal URLs:
- http://www.tandfonline.com/loi/tbis20#.UrShPk2IqmQ ↗
http://www.ingenta.com/journals/browse/bto/bird ↗
http://www.tandfonline.com/ ↗ - DOI:
- 10.1080/00063657.2016.1264362 ↗
- Languages:
- English
- ISSNs:
- 0006-3657
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 2672.xml