News tagged with migration

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Hitch-hiking with birds for life

Although chewing lice spend their entire lives as parasites on birds, it is difficult to predict patterns of lice distribution, new research from the University of Gothenburg, Sweden, reveals.

May 14, 2012 not rated yet 0

Researchers map fish species at risk from dams

Dams are believed to be one of the biggest threats to freshwater organisms worldwide: They disrupt normal patterns of water and sediment flow, impede migration, and alter the character of spawning and feeding grounds. A shortage ...

May 10, 2012 not rated yet 0

The net migration 'bounce'

New analysis by Oxford University’s Migration Observatory shows that any short term cut to net-migration brought about by reductions in immigration will be partially reversed in the long term because ...

Mar 05, 2012 not rated yet 1