Three surveys of acoustic data from around South Georgia, collected using a four frequency echosounder (38, 70, 120 and 200 kHz), were used to characterise Antarctic krill. Identification of krill targets was carried out using different permutations of two and three-frequency windows. Density was estimated, from identified krill targets, using the 120 kHz data and an acoustic scattering model. A Bland-Altman analysis with a pre-set nominal cut-off of ≤5 gm-2 bias between methods identified that only the 120-70 kHz (Sv120-70) identification window was comparable with the regularly used 120-38 kHz (Sv120-38) window, and only the 200-120 kHz and 120-70 kHz (Sv120-70 & Sv200-120) identification window was comparable with the regularly used 120-38 and 200-120 kHz (Sv120-38 & Sv200-120) three-frequency window.
The following information is provided by the Secretariat for the use of participants at the WG-SAM meeting to be held in Norwich, UK, from 25 to 29 June 2018.
Recommendation 28: The Secretariat ensure that capacity building and associated outreach support is strengthened in the next review of the Secretariat’s Strategic Plan.
(paragraphs 85 to 88)
Commission and SCAF
(2017) SCIC-2017, paragraph 218
(2018) CCAMLR-XXXVII, paragraphs 4.4 and 10.8 (Secretariat Strategic Plan and ICG on Capacity Building)
Recommendation 19: The current practice of managing the business of the Scientific Committee through an informal executive group be institutionalised as a Scientific Committee Bureau, in order to formalise good practices to improve the efficiency and conduct of business in the Scientific Committee and its working groups.
Recommendation 14: Agreements with adjacent regional fisheries bodies be further developed and operationalised to ensure the useful exchange of meaningful information and relevant data necessary to establish effective conservation and management measures applicable in the CCAMLR area.
Recommendation 5: On the basis of currently available data, the Scientific Committee, in consultation with SCAR, external experts and other organisations, deliver an initial assessment of the status, trends and possible future trajectories of Antarctic marine living resources, and the interactions of fisheries with them.
