Mouse Leaves Urine Scent Marks (IMAGE)
Caption
This male mouse has left brownish scent marks by depositing pheromone-rich urine on a fence separating his territory from those of other mice. A new University of Utah study found that when mother mice compete socially for mates in a so-called promiscuous environment, their sons produce more pheromones, making them more sexually attractive to female mice than the sons of mothers with only one mate.
Credit
Doug Cornwall, University of Utah.
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