[OANNES Foro] Fish migration reduces predation

[Mario Cabrejos]

Nature
Volume: 495
Published online 06 March 2013 
doi:10.1038/495008a

Fish in Danish lakes substantially reduce their risk of being eaten by making annual migrations. Thus, predation - alongside food and weather - may drive such movements.
Fish migration reduces predation
Jakob Brodersen
http://www.nature.com/nature/journal/v495/n7439/full/495008a.html?WT.ec_id=NATURE-20130307

Christian Skov at the Technical University of Denmark in Silkeborg and his team implanted 2,219 roach (Rutilus rutilus) with tags during a 4-year period, and monitored individuals' migratory behaviour. Most of the tags recovered from a nearby colony of cormorants (Phalacrocorax carbo) were from fish that were last recorded as being in lakes. Roach that spent most time in the lakes during winter were substantial.
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