منابع مشابه
Feeding Behavior-Related Toxicity due to Nandina domestica in Cedar Waxwings (Bombycilla cedrorum)
Dozens of Cedar Waxwings were found dead in Thomas County, Georgia, USA, in April 2009. Five of these were examined grossly and microscopically. Grossly, all the examined birds had pulmonary, mediastinal, and tracheal hemorrhages. Microscopically, several tissues and organs were diffusely congested and hemorrhagic. Congestion and hemorrhage were marked in the lungs. Intact and partly digested b...
متن کاملNUTRITIONAL BUDGETS IN FREE FLYING BIRDS: CEDAR WAXWINGS (~O~~YCrLLA CE~RORU~) FEEDING ON WASHINGTON HAWTHORN FRUIT
l. Nutritional balances for calories, glucose, water, nitrogen, Na+, K+, Ca2+, and Mg2+ have been estimated for free-flying cedar waxwings feeding on Washington hawthorn fruits. 2. Birds assimilate 39.9 calories/fruit ( = 20.0% of available calories) and a net loss of 155 mg of water/fruit. 3. Reducing sugars account for 74.5% of assimilated calories ( = 66.0% assimilation efhciency). 4. While ...
متن کاملThe membrane-bound intestinal enzymes of waxwings and thrushes: adaptive and functional implications of patterns of enzyme activity.
Cedar waxwings (Bombycilla cedrorum) feed predominantly on fruits that are rich in simple sugars and low in nitrogen, supplementing this diet with arthropod prey during the summer months as well as flowers and tree sap in springtime. In contrast, thrushes feed extensively on fatty, protein-rich invertebrate prey, supplemented with sugary and lipid-rich fruits. Simple sugars and fats are digeste...
متن کاملPersistence of host defence behaviour in the absence of avian brood parasitism.
The fate of host defensive behaviour in the absence of selection from brood parasitism is critical to long-term host-parasite coevolution. We investigated whether New World Bohemian waxwings Bombycilla garrulus that are allopatric from brown-headed cowbird Molothrus ater and common cuckoo Cuculus canorus parasitism have retained egg rejection behaviour. We found that egg rejection was expressed...
متن کاملCEDAR-GEM Joint Workshop
Ocean tsunami wavelengths are sufficiently long to produce atmospheric internal gravity waves that propagate to the ionosphere, creating disturbances in ionospheric electron density that travel with the ocean waves below. These traveling ionospheric disturbances (TIDs) can be observed using measurements of integrated ionospheric electron density (also known as total electron content, or TEC) be...
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ژورنال
عنوان ژورنال: Science
سال: 1893
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.ns-21.534.235