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Life

Brain-shrinking algae send sea lions off course

21 October 2009

ALGAL red tides can have some odd effects on marine creatures – causing sea lions to stray into pools and parking lots, for instance. Now high-tech medical equipment is offering a peek inside the animals’ skulls to discover what causes such bizarre behaviour.

of the University of South Florida in St Petersburg studied wild sea lions, including some that showed symptoms of poisoning by domoic acid – the neurotoxin secreted by the algae. He placed anaesthetised sea lions in an MRI scanner to image their brains, and found that the hippocampus of sick animals was half the size…

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