منابع مشابه
Metabolism during flight in the laughing gull, Larus atrida
TUCKER, VANCE A. Metabolism during flight in the laughing gull, Lams atricilla. Am. J. Physiol. 222(2): 237-245. 1972.-The mean metabolic rates of two laughing gulls (mean body mass, 0.30 kg) flying in a wind tunnel were between 23 and 38 w/kg0*325 depending on flight speed and angle of flight. A change in the intensity of air turbulence in the tunnel from 0.88 to 1 .44y0 had little effect on t...
متن کاملHybridization of glaucous gull (Larus hyperboreus) and herring gull (Larus argentatus) in Iceland: mitochondrial and microsatellite data.
Large white-headed gulls provide an interesting group of birds for studies of hybridization. The group is composed of 20 species of recent origin, often with weak reproductive barriers. Here we report the results from a study on the glaucous gull Larus hyperboreus, an Arctic species which has been breeding in Iceland for centuries, and the herring gull Larus argentatus which has a wide distribu...
متن کاملEnvironmentally acquired lead in the laughing gull, Larus atricilla.
Lead concentrations were measured in eggs, prefledgings and adult laughing gulls collected near Galveston, Texas. No lead was found in eggs. Prefledgling and adult birds had lead ranging from zero to 16 mug/g wet tissue. Liver had the greatest lead concentrations followed by brain, heart and skeletal muscle. There were no significant differences in lead concentrations between fledglings and adu...
متن کاملVisceral urate deposition in a little bittern (Ixobrychus minutus)
Visceral urate deposition (visceral gout) is a common finding during post-mortem examination of poultry. Rare cases of visceral gout may occur in wild birds. A rare case of visceral urate deposition in a little bittern (Ixobrychus minutus) is reported here. In May 2013, carcass of a little bittern was submitted for necropsy to the Clinic of Poultry Diseases (Faculty of Veterinary Medic...
متن کاملExploring plasticity in the wild: laying date-temperature reaction norms in the common gull Larus canus.
Exploration of causal components of plasticity is important for insight into evolutionary dynamics and an organism's ability to respond to climate change. Among individuals, variation in plasticity can be due to genotype-environment interaction (GxE) or a result from environmental effects associated with an individual. We investigated plasticity for laying date in the common gulls Larus canus, ...
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ژورنال
عنوان ژورنال: Journal of the Yamashina Institute for Ornithology
سال: 1991
ISSN: 1883-3659,0044-0183
DOI: 10.3312/jyio1952.22.80