Mackerel icefish (Champsocephalus gunnari) catches, biomass and diet composition from the South Georgia (southwest Atlantic) groundfish survey, 1986-2023

This dataset consists of biomass data and diet composition of mackerel icefish (Champsocephalus gunnari) from the South Georgia groundfish survey, collected during scientific trawl surveys from 1986 to 2023. These data were primarily collected to produce estimates of mackerel icefish biomass to inform management of the icefish fishery, and to further our understanding of icefish ecology, distribution, and diet. Data were primarily collected by Martin A. Collins, Mark Belchier, Inigo Everson, Jude Brown, Phil Hollyman, Simeon Hill, Tom Marlow, Caradoc Jones, Rebecca Mitchell & Sue Gregory. Since 1990, the South Georgia groundfish surveys were funded by the Government of South Georgia and the South Sandwich Islands. Earlier surveys were funded by the US and Polish governments.