The tag number was drawn at random from all reports of recaptured toothfish in CCAMLR exploratory fisheries in 2017/18. The winning tagged Antarctic toothfish was recaptured by the Kostar in Subarea 88.1 on 25 December 2017, 1 814 days after it was originally tagged on 6 January 2013, only 30 km away.
The CCAMLR Scientific Committee thanked COLTO for continuing this very useful initiative.
More information about the tag lottery is available from the COLTO website.
The CCAMLR tagging program
Tagging and recapturing toothfish is a key part of CCAMLR's approach to managing the toothfish fishery. Each vessel is required to tag and release a proportion of the toothfish that they catch and report all of this information to CCAMLR. By doing so there is a known number of tagged fish in the population. As the ratio of tagged to untagged fish in subsequent catches is assumed to be the same as the ratio of tagged to untagged fish in the overall population, this allows CCAMLR to estimate the total population of toothfish in an area.