A surprising 60-year boom in global octopus, squid and cuttlefish numbers points to long-term changes taking place in the world's oceans, scientists say.
Research published in Current Biology today shows a steady increase in the world cephalopod population — the class of molluscs comprising octopus, squid and cuttlefish — since the 1950s, at a time of increased fishing, growing pollution and ocean warming.
The data analysis, led by Dr Zoe Doubleday from Australia's Environment Institute at the University of Adelaide, has confounded previous expectations that cephalopod populations go through cyclical booms and busts.
"Anecdotal evidence had suggested the population may experience cyclical booms and busts over time, but there is instead a very consistent increase," she said.
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