Phylogenetics and ecomorphology of emarginate primary feathers
نویسندگان
چکیده
منابع مشابه
comparison of zoe and vitapex for canal treatment of necrotic primary teeth
چکیده ندارد.
15 صفحه اولHummingbird hovering energetics during moult of primary flight feathers.
How does a hovering hummingbird compensate for the loss of flight feathers during moult when the mechanism of lift force generation by flapping wings is impaired? The flight performance of five individual ruby-throated hummingbirds with moulting primary flight feathers and reduced wing area was compared with that before their moult. Hummingbirds were flown in reduced air densities using normoxi...
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متن کاملThickness of Feathers
Briefly, a feather is a semigroup derivation diagram with the labels on the edges removed. In this paper, we are concerned with possible definitions for the thickness of a feather. A major open problem is whether the word problem is solvable for semigroup presentations with one defining relation. It is known that word problems for semigroup presentations are solvable if the number of regions in...
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ژورنال
عنوان ژورنال: Journal of Morphology
سال: 2017
ISSN: 0362-2525,1097-4687
DOI: 10.1002/jmor.20686