Several ecologically-important shark populations in the Mediterranean Sea have completely collapsed, according to a new study, with numbers of five species now more than 96 percent below what existed two centuries ago.
"This loss of top predators could hold serious implications for the entire marine ecosystem, greatly affecting food webs throughout this region," said the lead author of the study, Francesco Ferretti, a doctoral student in marine biology at Dalhousie University in Nova ....
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