ABSTRACT
The paper presents an estimate of IUU catches of toothfish during the 2009/10 fishing season, using the
standard, compliance derived methodology.
The paper was revised on 4 October 2010 to take into account new information submitted in
respect of two vessels fishing in Divisions 58.4.1 and 58.4.4a. Changes from version 1 are
highlighted in bold.

ESTIMATION OF IUU CATCHES OF TOOTHFISH INSIDE THE
CONVENTION AREA DURING THE 2009/10 FISHING SEASON
BACKGROUND
The Secretariat has prepared an estimate of IUU catches of Dissostichus spp. in the
Convention Area for the 2009/10 season using the existing compliance-derived methodology.
This methodology calculates total IUU catch levels as a product of the fishing time of IUU
vessels and likely daily catch rates. The fishing time of IUU vessels is based on reports on
the presence of IUU vessels in the Convention Area. Verified reports of undocumented
landings and trade may also be taken into consideration if they show that IUU fishing for
toothfish has occurred and which has not already been attributed to a sighting report.
Information on the estimated number of days fished has generally been obtained from reports
of patrols and inspections, the CDS database or from the logbooks of IUU vessels where
available. Catch rates of IUU vessels are generally based on catch and effort reports from
licensed longline fisheries from the same area unless more precise information is available,
eg. information from IUU vessels.
2. At CCAMLR-XXVIII, the Secretariat was also requested to provide revised estimates
for gillnet catches for previous years and estimates of IUU catches of both D. eleginoides and
D. mawsoni (CCAMLR-XXVIII, paragraph 9.12).