نتایج جستجو برای: wintering

تعداد نتایج: 2246  

Journal: :Biology letters 2011
Laurent Godet Mikaël Jaffré Vincent Devictor

Effects of climate change on species occupying distinct areas during their life cycle are still unclear. Moreover, although effects of climate change have widely been studied at the species level, less is known about community responses. Here, we test whether and how the composition of wader (Charadrii) assemblages, breeding in high latitude and wintering from Europe to Africa, is affected by c...

2004
HANS MELTOFTE

There is increasing evidence that breeding wader censuses often have significantly underestimated densities in the Arctic and other areas. This evidence includes the recording of many more red knots Calidris canutus in the West Palearctic and African wintering areas than can be accounted for on the Arctic breeding grounds. The main causes of underestimated breeding numbers are that many species...

Journal: :Biology letters 2005
Thomas P Weber Johan Borgudd Anders Hedenström Kent Persson Göran Sandberg

Flight feather moult in small passerines is realized in several ways. Some species moult once after breeding or once on their wintering grounds; others even moult twice. The adaptive significance of this diversity is still largely unknown. We compared the resistance to mechanical fatigue of flight feathers from the chiffchaff Phylloscopus collybita, a migratory species moulting once on its bree...

Journal: :Agriculture 2023

Among the honeybee subspecies, Polish beekeepers most commonly rear three of them, i.e., Apis mellifera carnica, A. m. and caucasica. They differ in morphological physiological features. Our goal was to find a linkage between their thermal behaviour body glycogen content that could be decisive for wintering perspective. We compared temperature preference concentration six groups subspecies obta...

Journal: :Journal of the Japan Veterinary Medical Association 1977

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید