Illegal fishing in the Pacific has fallen below 2016 levels thanks to effective fisheries monitoring and surveillance, among other factors, according to a study, reports Radio New Zealand.   The study by the Australia-based fisheries consulting firm MRAG Asia Pacific, released in late 2021, suggests the problem of illegal, unreported and unregulated (IUU) fishing in the Pacific, while still serious, is not nearly as big as suggested by an earlier report.   The 2016 report estimated that 306,440 metric tons of tuna annually were caught through IUU fishing. The latest report estimates IUU fishing at a level of 192,186t per year, or about 6.5% of the total tuna catch in 2019 in the Western and Central Pacific area [...]