Photo: Frustrated youth (Image: Mark P. Cotter)From New Scientist:
SEEMINGLY random acts of violence by bottlenose dolphins on porpoises could be down to sexual frustration among young males.
Cases of the cetaceans killing other creatures for no apparent reason have been reported in UK waters. Now bottlenose dolphins have been seen attacking harbour porpoises in the Pacific Ocean. Crucially, these observations show for the first time that the attackers are young males (Marine Mammal Science, DOI: 10.1111/j.1748-7692.2011.00474.x).
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