Dead dolphins: Peru's beaches littered with hundreds of dead dolphins – again
Dead dolphins: More than 400 dead dolphins were found in northern Peru in January. In 2012, more than 870 dead dolphins were found in the same area, and the cause of death was never determined.
De la Cruz said autopsy results are expected in two weeks. Exams will focus on lungs, kidneys, and livers.
Autopsies of some of the more than 870 dolphins found in 2012 were inconclusive. Speculation ranged from biotoxins in the sea to seismic testing to an unknown ailment.
Yuri Hooker, director of the marine biology unit at Cayetano Heredia University, told The Associated Press that in other parts of the world dolphin deaths generally are caused by environmental contamination. Either the sea mammals eat fish and other smaller species filled with toxins or else they ingest discarded plastic floating in the sea.
The marine biologist said determining the death of dolphins is "complicated" in Peru because government laboratories have only three or four of the 100 or so chemical reagents that can be used to determine the animals' cause of death.
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