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Efforts to prioritize conservation planning are undermined by several recognized knowledge shortfalls. Here we highlight a further shortfall, which we term the ‘movement shortfall’, in our knowledge of species movements, with particular reference to dispersive, irruptive and nomadic birds. Despite 100 years of ringing effort, the movement characteristics of these species are still poorly known, as...
BackgroundPortal‐systemic shunts (PSSs) are rarely seen in healthy individuals or patients with non‐cirrhotic liver disease. They may play an important role in hepatic metabolism as well as in the spread of gastrointestinal metastatic tumours to specific organs. Small spontaneous PSSs may be more common than generally thought. However, epidemiological data are scarce and inconclusive. This systematic...
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