29 Oct '14, 7pm

By killing off older fish, overfishing may lead to lost migratory patterns

By killing off older fish, overfishing may lead to lost migratory patterns

Catching older fish may impact a school's ability to migrate from spawning grounds to feeding areas, according to a recent study published in the Journal of the Royal Society Interface . The study’s scientists believe that fish schools may retain a collective memory, a communal mind map of sorts, which help these groups reach their destinations, some of which are thousands of miles away. Such migratory patterns would be held in the minds of the older and more experienced fish, unfortunately the same fish most targeted by fisheries. Given this, the scientists hypothesize that overfishing could lead to drastic changes in group formation, migratory patterns, and overall collective behavior. The study, which employed mathematical modeling to understand how migrations might be impacted, was led by a group of physicists and biologists. It is "mainly theoretical," Giancarlo De Lu...

Full article: http://news.mongabay.com/2014/1029-wilson-overfishing-los...

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