Almost a third of commercial fishing lines, along with 6 percent of all fishing nets and 9 percent of all traps are lost or discarded in the world's oceans, a new study by Australia's national science agency has found.

Researchers from the Commonwealth Scientific and Industrial Research Organization (CSIRO) analyzed 68 studies from between 1975 and 2017 to produce a picture of how "ghost" gear is contributing to global marine pollution.

Kelsey Richardson, a PhD student from CSIRO's Marine Debris Team, led the study.