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Brain size determines whether fish hunters or slackers
Date:8/4/2010

e olfactory bulb is not tied to foraging, and it's also an area that's near the telencephalon."

Although this research has shown that the fish's feeding activity is tied to brain structure, McLaughlin said it is still unclear whether behavioural differences reflect initial differences in the brain or whether the brain changes in response to differences in behaviour.

"It's possible there is something in the environment or in the fish's genetic makeup that is making some fish more active than others, and this level of activity is altering the brain," he said.

"There is evidence that fish are plastic and can change structure based on where neurons are developing more rapidly."

Either way, this finding will help in understanding the neural mechanism behind different foraging behaviours observed in wild animal populations.

"It's a huge step towards understanding why different types of personalities exist in the same species and how diversity arises in a population. We tend to focus on our impact on the environment and how our actions are reducing biodiversity and overlook processes in the environment that may be creating diversity."


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Contact: Prof. Robert McLaughlin
rlmclaug@uoguelph.ca
519-824-4120 x53620
University of Guelph
Source:Eurekalert

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