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The incredible shrinking iguana.
Australasian Business Intelligence, May, 2006
Byline: Sally Palmer
May 23, 2006 (New Scientist - ABIX via COMTEX) -- Researchers are studying changes in the size of Galapagos marine iguanas. Ecologist Martin Wikelski of Princeton University noticed that the size of the iguanas varied from year to year. Larger iguanas are favoured in sexual selection but are most affected in years when food is scarce. The shrinkage is more pronounced in El Nino years, which affect their main food source, algae. Research is continuing to discover whether the change is due to bone absorption and if changes in diet cause the release of hormones that instructs the bone to grow or degrade.
Publication Date: 20 May 2006
PRINCETON UNIVERSITY
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