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The Radcliffe Wave is oscillating.
Nature
April 2024
Department of Astrophysics, University of Vienna, Vienna, Austria.
Our Sun lies within 300 parsecs of the 2.7-kiloparsecs-long sinusoidal chain of dense gas clouds known as the Radcliffe Wave. The structure's wave-like shape was discovered using three-dimensional dust mapping, but initial kinematic searches for oscillatory motion were inconclusive.
View Article and Find Full Text PDFThe Influence of Food Density, Flock Size, and Disturbance on the Functional Response of Bewick's Swans () in Wintering Habitats.
Animals (Basel)
November 2019
Department of Resources Conservation and Utilization, Anhui Shengjin Lake National Nature Reserve, Dongzhi 247200, China.
Perceiving how animals adjust their feeding rate under a variety of environmental conditions and understanding the tradeoffs in their foraging strategies are necessary for conservation. The Holling functional response, which describes the relationship of feeding rate and food density to searching rate and handling time, has been applied to a range of waterbirds, especially with regard to Type II functional responses that describe an increasing feeding rate with food density but at a decelerating rate as the curve approaches the asymptote. However, feeding behavior components (feeding rate, searching rate, and handling time) are influenced by factors besides prey density, such as vigilance and flock size.
View Article and Find Full Text PDFA review on swimmer's itch and the occurrence of bird schistosomes in Iceland.
J Helminthol
June 2009
Institute for Experimental Pathology, University of Iceland, Reykjavík, Iceland.
In the past decade, swimmer's itch (SI) has repeatedly occurred in people who have been wading or bathing in ponds or lakes in Iceland where water birds and snails are abundant. Some of the affected sites were warmed by geothermal activity, and others were not. A search for the causative agent of SI, ocellate furcocercariae that have been found in Iceland only in Radix peregra snails, revealed an average infection prevalence of 1.
View Article and Find Full Text PDFDiversity of bird schistosomes in anseriform birds in Iceland based on egg measurements and egg morphology.
Parasitol Res
June 2008
Laboratory of Parasitology, Institute for Experimental Pathology, Keldur, University of Iceland, 112 Reykjavik, Iceland.
Radix balthica is the only freshwater mollusc in Iceland that has been found to be the intermediate host of ocellate furcocercariae. Infections are common. On average, 4.
View Article and Find Full Text PDFSurveillance of amyloidosis and other diseases at necropsy in captive trumpeter swans (Cygnus buccinator).
J Vet Diagn Invest
May 2005
Department of Veterinary Pathology, 2740, College of Veterinary Medicine, Iowa State University, Ames, IA 50011-1250, USA.
The purpose of this study was to characterize the incidence and diagnostic features of amyloidosis and other diseases found at necropsy in captive trumpeter swans (Cygnus buccinator). A search of Iowa State University's Department of Veterinary Pathology and Veterinary Diagnostic Laboratory databases yielded 31 trumpeter swan (C. buccinator) necropsy cases from captive swans in protected habitats.
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