We compare supervised, using the interactive software Echoview™, and unsupervised, using python, processing of acoustic data collected during the UK cruise DY098. The same data processing procedures are applied in both methods, and we show that the unsupervised method comes up with a similar estimate of krill NASC and krill density as the supervised method. An estimate of krill density is supplied for the WCB survey using three methods. The multifrequency method produces a krill density of 8.60 gm-2, compared with 21.76 gm-2 (supervised) or 20.41 gm-2 (unsupervised).
Dr Sophie Fielding (United Kingdom)
Ms Doro Forck (CCAMLR Secretariat)