http://www.bbc.co.uk/news/science-environment-14852081Scientists are starting a novel project to investigate whether overfishing alters fish behaviour and changes their pattern of development.
Overexploitation of stocks has already been shown to select for smaller fish.
A team reporting at the meeting of the European Society for Evolutionary Biology in Germany will deliberately remove the largest individuals from populations of lab-bred guppies.
The experiment is designed to uncover what is happening in our oceans.