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Study suggests theory for insect colonies as 'superorganisms'
Date:1/19/2010

ial systems have arisen through natural selection the process by which evolution occurs. The evolution of social systems of insects in particular, where sterile workers live only to help the queen reproduce, has long been a mystery, Gillooly said.

"In life, two of the major evolutionary innovations have been how cells came together to function as a single organism, and how individuals joined together to function as a society," said Gillooly, who is a member of the UF Genetics Institute. "Relatively speaking, we understand a considerable amount about how the size of multicellular organisms affects the life cycle of individuals based on metabolic theory, but now we are showing this same theoretical framework helps predict the life cycle of whole societies of organisms."

Researchers note that insect societies make up a large fraction of the total biomass on Earth, and say the finding may have implications for human societies.

"Certainly one of the reasons folks have been interested in social insects and the consequences of living in groups is that it tells us about our own species," said study co-author Michael Kaspari, Ph.D., a presidential professor of zoology, ecology and evolutionary biology at the University of Oklahoma and the Smithsonian Tropical Research Institute. "There is currently a vigorous debate on how sociality evolved. We suggest that any theory of sociality be consistent with the amazing convergence in the way nonsocial and social organisms use energy."


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Contact: John Pastor
jdpastor@ufl.edu
352-273-5815
University of Florida
Source:Eurekalert

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