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'Stupid strategies' could be best for the genes
Date:2/28/2011

Blindly copying what your parents did no matter how stupid it may seem could be the best strategy for the long-term success of your genes, according to research by the Universities of Exeter and Bristol.

The findings of the study, published in Ecology Letters, show that apparently mindless survival strategies such as the long-distance migration of many animals to breed at the place they were born may not be as impractical as they appear.

Using mathematical models, researchers compared the evolutionary success of straightforward copying strategies with that of more dynamic approaches that focused on adapting to new information to make key lifestyle decisions.

Dr Sasha Dall, from Exeter's Centre for Ecology and Conservation in Cornwall, said: "From an individual perspective, sometimes sticking to what your parents did may seem a ridiculously stupid thing to do, especially when they can be out of touch with current events. However, it's a different story when you look at it from the perspective of your genes.

"What we actually found is, in certain circumstances, it can be a more effective method of ensuring long-term survival of your genes than more nuanced strategies. So, surprisingly, this kind of mindless strategy can actually be more effective than the more sophisticated alternative of adjusting to changes you detect in your environment."

The conclusion centres around what they are calling the 'multiplier effect'. This states that if you are in exactly the right environment for your genotype, you will thrive and breed. So, over generations, more and more individuals will find themselves in conditions to which they are suited if they just do what their parents did.

Those in the wrong place for their genotypes will not do well and others who behave like them will leave fewer and fewer descendents leaving those being born in the right places to dominate the population.

Professor John McNam
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Contact: Daniel Williams
d.d.williams@exeter.ac.uk
44-139-272-2062
University of Exeter
Source:Eurekalert

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