منابع مشابه
Oxygen consumption during hover-feeding in free-ranging Anna hummingbirds.
Rates of oxygen consumption during hover-feeding of wild, unrestrained, adult male Anna hummingbirds (Calypte anna) were measured with an artificial outdoor feeder converted into a respirometer mask. A computer sampled changes in O2 concentration in air drawn through the mask, automatically detecting the presence of a hummingbird from a drop in the O2 concentration, and photoelectrically timing...
متن کاملHummingbirds
easily fill an article or, indeed, a monograph. This systematic screen for developmental mutations has revolutionized developmental genetics, and it provides a veritable Who’s Who of developmental regulatory genes, each of which has given rise to an entire cottage industry of research. Of course the two papers also led directly to a Nobel Prize, which just means that they have good taste in Sto...
متن کاملVisual Sensory Signals Dominate Tactile Cues during Docked Feeding in Hummingbirds
Animals living in and interacting with natural environments must monitor and respond to changing conditions and unpredictable situations. Using information from multiple sensory systems allows them to modify their behavior in response to their dynamic environment but also creates the challenge of integrating different, and potentially contradictory, sources of information for behavior control. ...
متن کاملAdaptive thermogenesis in hummingbirds.
The occurrence of non-shivering thermogenesis in birds has long been a controversial issue. Although birds are endothermic vertebrates, sharing with mammals (placental mammals and marsupials) a common ancestor, they do not possess brown adipose tissue or a similar type of tissue, unlike their mammalian counterparts. Some bird species are, however, able to withstand very low ambient temperatures...
متن کاملDo Hummingbirds See in Ultraviolet?
We present a numerical model to fit the electroretinogram (ERG), a gross evoked eye visual potential, that originate in the retina through photons absorption by photoreceptors and then involve the contribution form others retinal neurons. We use the ERG measured in a hummingbird, to evaluate the most likely retinal mechanism - cones visual pigments and oil-droplets - that participate in their h...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1952
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay1209