SOURCE: The Guardian
DATE: November 6, 2019
SNIP: Lost and abandoned fishing gear which is deadly to marine life makes up the majority of large plastic pollution in the oceans, according to a report by Greenpeace.
More than 640,000 tonnes of nets, lines, pots and traps used in commercial fishing are dumped and discarded in the sea every year, the same weight as 55,000 double-decker buses.
The report, which draws on the most up-to-date research on “ghost gear” polluting the oceans, calls for international action to stop the plastic pollution, which is deadly for marine wildlife.
About 300 sea turtles were found dead as a result of entanglement in ghost gear off the coast of Oaxaca, Mexico, last year. And in October, a pregnant whale was found entangled in ghost gear off the Orkney coast. The fishing gear was jammed in the animal’s baleen, the filter-feeder system inside its mouth, and scientists said the net would have hugely impaired the minke whale’s feeding and movement.
The report said abandoned fishing gear a particularly deadly. “Nets and lines can pose a threat to wildlife for years or decades, ensnaring everything from small fish and crustaceans to endangered turtles, seabirds and even whales,” it said.
“Spreading throughout the ocean on tides and currents, lost and discarded fishing gear is now drifting to Arctic coastlines, washing up on remote Pacific islands, entangled on coral reefs and littering the deep seafloor.”
Ghost gear is estimated to make up 10% of ocean plastic pollution but forms the majority of large plastic littering the waters. One study found that as much as 70% (by weight) of macroplastics (in excess of 20cm) found floating on the surface of the ocean was fishing related.
A recent study of the “great Pacific garbage patch”, an area of plastic accumulation in the north Pacific, estimated that it contained 42,000 tonnes of megaplastics, of which 86% was fishing nets.