A circannual perspective on daily and total flight distances in a long-distance migratory raptor, the Montagu's harrier, Circus pygargus .
| Autor: | Schlaich AE; Dutch Montagu's Harrier Foundation, PO Box 46, 9679ZG Scheemda, The Netherlands almut.schlaich@grauwekiekendief.nl.; Conservation Ecology Group, GELIFES, University of Groningen, PO Box 11103, 9700CC Groningen, The Netherlands.; Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS & Université de la Rochelle, 79360 Villiers-en-Bois, France., Bouten W; Computational Geo-Ecology, IBED, University of Amsterdam, PO Box 94248, 1090GE Amsterdam, The Netherlands., Bretagnolle V; Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS & Université de la Rochelle, 79360 Villiers-en-Bois, France.; LTER 'Zone Atelier Plaine & Val de Sèvre', Centre d'Etudes Biologiques de Chizé, CNRS, 79360 Villiers-en-Bois, France., Heldbjerg H; DOF-BirdLife Denmark, Vesterbrogade 140, 1620 Copenhagen V, Denmark.; Department of Bioscience-Wildlife Ecology, Aarhus University, Grenåvej 14, 8410 Rønde, Denmark., Klaassen RHG; Dutch Montagu's Harrier Foundation, PO Box 46, 9679ZG Scheemda, The Netherlands.; Conservation Ecology Group, GELIFES, University of Groningen, PO Box 11103, 9700CC Groningen, The Netherlands., Sørensen IH; DOF-BirdLife Denmark, Vesterbrogade 140, 1620 Copenhagen V, Denmark.; Danish Hunters' Association, Molsvej 34, 8410 Rønde, Denmark., Villers A; Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS & Université de la Rochelle, 79360 Villiers-en-Bois, France.; Unité Biostatistiques et Processus Spatiaux, INRA, Domaine Saint-Paul, Site Agroparc, 84914 Avignon Cedex 9, France., Both C; Conservation Ecology Group, GELIFES, University of Groningen, PO Box 11103, 9700CC Groningen, The Netherlands. |
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| Jazyk: | angličtina |
| Zdroj: | Biology letters [Biol Lett] 2017 Jun; Vol. 13 (6). |
| DOI: | 10.1098/rsbl.2017.0073 |
| Abstrakt: | Long-distance migrants are particularly recognized for the distances covered on migration, yet little is known about the distances they cover during the rest of the year. GPS-tracks of 29 Montagu's harriers from breeding areas in France, The Netherlands and Denmark showed that harriers fly between 35 653 and 88 049 km yr -1 , of which on average only 28.5% is on migration. Mean daily distances during migration were 296 km d -1 in autumn and 252 km d -1 in spring. Surprisingly, males' daily distances during breeding (217 km d -1 ) were close to those during migration, whereas breeding females moved significantly less (101 km d -1 ) than males. In terms of flight distance, the breeding season seemed nearly as demanding as migration periods for males. During the six winter months, both sexes moved less (114 and 128 km d -1 for females and males, respectively) than during migration. Harriers therefore covered shorter daily distances during winter which might allow birds to compensate for the more demanding phases of migration and breeding. (© 2017 The Author(s).) |
| Databáze: | MEDLINE |
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