Time allocation in migrating Northern Wheatears (Oenanthe oenanthe) during stopover: Is refuelling limited by food availability or metabolically?

2003 ◽  
Vol 144 (1) ◽  
pp. 33-44 ◽  
Author(s):  
Volker Dierschke ◽  
Julia Delingat ◽  
Heiko Schmaljohann
Keyword(s):  
Food Availability ◽  
Time Allocation ◽  
Oenanthe Oenanthe

scholarly journals Revealing the control of migratory fueling: An integrated approach combining laboratory and field studies in northern wheatears Oenanthe oenanthe

2013 ◽  
Vol 59 (3) ◽  
pp. 381-392 ◽  
Author(s):  
Franz Bairlein ◽  
Volker Dierschke ◽  
Julia Delingat ◽  
Cas Eikenaar ◽  
Ivan Maggini ◽  
...  
Keyword(s):  
Food Availability ◽  
Integrated Approach ◽  
Field Studies ◽  
Sub Saharan Africa ◽  
Control Mechanisms ◽  
Northern Wheatear ◽  
Eastern Canada ◽  
Extrinsic Factors ◽  
Oenanthe Oenanthe ◽  
Migration Program

Abstract Migratory birds rely on fueling prior to migratory flights. Fueling in migrants is controlled by intrinsic as well as extrinsic factors. From captive studies we have started understanding the internal mechanisms controlling bird migration. Field studies have demonstrated the effects of external factors, such as food availability, weather, competitors, parasites or diseases, on the stopover behavior of migrants. However, an integrated approach is still missing to study coherently how the innate migration program interacts with the varying environmental cues and to estimate the contribution of the innate migration program and the environment to realized migration. The northern wheatear Oenanthe oenanthe offers a unique opportunity for integrated studies. It breeds across almost the whole Holarctic with just a “gap” between eastern Canada and Alaska. All breeding populations overwinter in sub-Saharan Africa which makes the northern wheatear one of the most long-distant migratory songbirds with extraordinary long non-stop flights across oceans. It is a nocturnal migrant which travels without parental or social aid/guidance. Thus, young birds rely entirely on endogenous mechanisms of timing, route selection and fueling on their first outbound migration. By establishing indoor housing under controlled conditions the endogenous control mechanisms of northern wheatear migration could be revealed. At the same time, environmental factors controlling fueling could be investigated in the field. On migration wheatears occur in a variety of habitats with sparse vegetation where their stopover behavior could be quantitatively studied in the light of “optimal migration” theory by the use of remote balances, radio-tagging and even experimentally manipulated food availability. The present paper summarizes our approach to understand the control of migration in northern wheatears by combining field and laboratory studies at various spatial and temporal scales, and linking various sub-disciplines.

Northern Wheatear (Oenanthe oenanthe)

2020 ◽  
Author(s):  
Erica H. Dunn ◽  
David J. T. Hussell ◽  
Josef Kren ◽  
Amelia C. Zoerb
Keyword(s):  
Northern Wheatear ◽  
Oenanthe Oenanthe
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