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Shy fish live longer

Fish that show bravery often become prey themselves, whereas shyer individuals survive to a greater extent. In a new paper in Scientific reports, Kaj Hulthén et al. show the connection between bold personalities and the risk of being killed by a predator in the wild, by studying common roaches and cormorants in Lake Krankesjön outside Lund.
Swimming roach
The researchers marked common roaches, a widespread freshwater fish, and studied their personalities. After investigating which individuals then became food for cormorants, they were able to show that the bravest fish run twice the risk of being eaten compared to the shyest individuals. Read the entire pressrelease HERE

 

To the paper in Scientific reports: "A predation cost to bold fish in the wild"
Authors: Kaj Hulthén, Ben B. Chapman, P. Anders Nilsson, Lars-Anders Hansson, Christian Skov, Jakob Brodersen, Jerker Vinterstare & Christer Brönmark.

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Evolutionary Ecology, Department of Biology
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