175 research outputs found
High altitude flights by ruddy shelduck Tadorna ferruginea during trans-Himalayan migrations
No full textThis is the author accepted manuscript. The final version is available from Wiley via the DOI in this record.Birds that migrate across high altitude mountain ranges are faced with the challenge of maintaining vigorous exercise in environments with limited oxygen. Ruddy shelducks are known to use wintering grounds south of the Tibetan Plateau at sea level and breeding grounds north of Himalayan mountain range. Therefore, it is likely these shelducks are preforming high altitude migrations. In this study we analyse satellite telemetry data collected from 15 ruddy shelduck from two populations wintering south of the Tibetan Plateau from 2007 to 2011. During north and south migrations ruddy shelduck travelled 1481 km (range 548–2671 km) and 1238 km (range 548–2689 km) respectively. We find mean maximum altitudes of birds in flight reached 5590 m (range of means 4755–6800 m) and mean maximum climb rates of 0.45 m s –1 (range 0.23–0.74 m s –1 ). The ruddy shelduck is therefore an extreme high altitude migrant that has likely evolved a range of physiological adaptations in order to complete their migrations
Emerging role of echocardiography, cardiac magnetic resonance imaging and 99mTc-labeled bone tracer scintigraphy for the diagnosis of cardiac amyloidosis
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PET imaging of aortic atherosclerosis: Is combined imaging of plaque anatomy and function an amaranthine quest or conceivable reality?
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Are there any guarantees with the warranty period for normal stress SPECT myocardial perfusion imaging?
No full textClose Contact: A Colocation Model for Academic-Industrial Partnerships in Drug Discovery
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Effects of CT‐based attenuation correction of rat microSPECT images on relative myocardial perfusion and quantitative tracer uptake
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