نتایج جستجو برای: captive birds
تعداد نتایج: 49516 فیلتر نتایج به سال:
CERTAIN birds when held in small cages during the migration seasons exhibit a nocturnal restlessness which has been interpreted as an expression of migratory condition and termed Zugunruhe. In 1949 the late Gustav Kramer demonstrated that Red-backed Shrikes (Lanius collurio) and blackcaps (Sylvia atricapilla), placed in cages under the night sky, often tended to orient their Zugunruhe toward th...
Behavior is usually the first line of defense against parasites. Antiparasite behaviors, such as grooming, or outright avoidance, have been shown to reduce the risk of parasitism in a wide variety of host–parasite systems. However, despite the central importance of antiparasite behavior, little is known about the extent to which prior exposure to parasites improves effectiveness. Here, we repor...
Plasma metabolites provide information about the physiological state and fuel use of birds, and have been used for predicting refueling rates of birds during migratory stopovers. However, little is known about the effect of diet on metabolite concentrations in small songbirds. We investigated the effect of dietary macronutrient composition on lipid and protein metabolites in captive White-throa...
Pododermatitis is a worldwide problem in captive flamingos. We performed an evaluation of different influence factors (age, sex, weight, origin, breeding status) and a comparison of foot lesions between several zoological institutions and the feet of free-ranging Greater flamingos (Phoenicopterus roseus). A scoring system was used to determine the prevalence and types of lesions and severity. C...
History: Tissues submitted were from multiple individuals that were among 12 captive Australian finches in the same exhibit that presented with feather loss, dehydration, weight loss, lethargy, and/or respiratory distress. Most birds died or were euthanized shortly after presentation (1-2 days). On physical exam, these birds were very thin and dehydrated, and had feather loss on their heads and...
Frozen blood samples from 13 species of free-ranging birds (n = 65) and captive Chilean flamingos (Phoenicopterus chilensis) (n = 46) housed outdoors in the Chicago area were screened for Plasmodium. With the use of a modified polymerase chain reaction, 20/65 (30.8%) of free-ranging birds and 26/46 (56.5%) of flamingos were classified as positive for this parasite genus. DNA sequencing of the p...
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