Yawning and thermoregulation in budgerigars, Melopsittacus undulatus
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منابع مشابه
Experimental evidence of contagious stretching and ingroup bias in budgerigars (Melopsittacus undulatus).
Previous observational research suggests that stretching is contagious in budgerigars (Melopsittacus undulatus). Here we report the first experimental evidence of this response through a reanalysis of a previous experiment testing for contagious yawning in this species. Using a repeated measures design, 16 birds were tested as pairs alongside familiar and unfamiliar conspecifics with and withou...
متن کاملHearing and vocalizations of wild-caught Australian budgerigars (Melopsittacus undulatus).
This study examined the hearing and contact calls of wild-caught Australian budgerigars (Melopsittacus undulatus) and compared these data to hearing and vocalizations in the much more extensively studied domesticated budgerigar. The spectral energy in the contact calls of both wild-caught and domesticated budgerigars falls almost exclusively in the frequency of 2-4 kHz. Absolute and masked thre...
متن کاملSuccessful treatment of macrorhabdosis in budgerigars (Melopsittacus undulatus) using sodium benzoate
Macrorhabdosis is a debilitating syndrome in budgerigars (Melopsittacus undulatus) due to theascomycetous yeast Macrorhabdus ornithogaster. In the present study, occurrences of acutemacrorhabdosis resulting in severe mortality in budgerigar fledglings and the effect of differenttreatment regimens for the control of the disease were investigated. The budgerigar (Melopsittacusundulates) flock con...
متن کاملExperimental toxoplasmosis in budgerigars (Melopsittacus undulatus).
The susceptibility of budgerigars (Melopsittacus undulatus) to graded doses of Toxoplasma gondii oocysts was studied. Sixteen budgerigars were divided into 4 groups (A-D) of 4 each. Birds in groups A-C were fed 100,000, 1,000, or 100 infective oocysts of the VEG strain of T. gondii, respectively. Budgerigars in group D were not fed oocysts and served as controls. All 4 birds in group A died (or...
متن کاملFrequency discrimination in budgerigars (Melopsittacus undulatus): effects of tone duration and tonal context.
Studies of frequency resolving power in budgerigars (Melopsittacus undulatus) have shown that this species has excellent discrimination abilities for both simple and complex sounds falling in the region of 2 to 4 kHz--the frequency range of their contact call. In four experiments, frequency discrimination by budgerigars of short tones similar to elements found in the contact call was examined. ...
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تاریخ انتشار 2008