From the early 1970s to beginning of the1990s mackerel icefish made up the largest commercial fish catches of any species for large sections of its distribution in response to earlier depletion of Notothenia rossi populations. Catches before regulation of well over 50,000 tons were common (Kuhn 2006). Currently commercial fishing of C. gunnari is only permitted on a limited scale for the populations of South Georgia, Heard Island, and McDonald Island where populations have recovered in some degree from unregulated exploitation. C. gunnari stocks in the entire Scotia Arc remain at least one order of magnitude larger in the mid-1970 when fisheries were established (Kock 2005b) and fishing there has been prohibited sine 1990 (Kuhn 2006).
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