A proposal is submitted to suggest modifications to the boundaries of Division 58.5.2 and the creation of a new Division 58.5.3. The modified or new Divisions reflect more accurately the distribution of management units for toothfish in the region within and adjacent to the Convention Area.

The work of the Scientific Committee is expanding with a duplication of many functions in the two working groups and subgroups. There is also a need to give time to emerging issues for which there is insufficient time at present in the existing working groups, such as consideration of marine protected areas in a CCAMLR context and the development and evaluation of management strategies for CCAMLR fisheries. It is proposed that the working groups of the Scientific Committee be revised to streamline the work, help reduce the number of groups and time needing to be attended by our experts and to develop a work program that does not require all issues to be addressed every year. The Working Groups are proposed to be (i) Biology, Ecology and Conservation, (ii) Statistics, Assessment Methods and Modelling, and (iii) Assessments and Fisheries. It is also proposed to have workshops coordinated by the Scientific Committee on the development of management procedures for krill, toothfish and icefish and other topical issues. The aim of these workshops would be to bring together experts in biology, ecology, conservation, statistics, assessments and modelling.

This paper presents a revised analysis of krill biomass for Division 58.4.2 using data from the 2006 Australian survey and based on the most recent advice from WG-EMM.

Publicly available bathymetry and geophysical data can be used to map geomorphic features of the Antarctic continental margin and adjoining ocean basins at scales of 1:1-5 million. The geomorphic features identified and their properties can be related to major habitat characteristics such as sea floor type (hard versus soft), ice keel scouring, sediment deposition or erosion and current regimes. Where more detailed data are available, shelf geomorphology provides a guide to the distribution of the shelf benthic communities recognised by a number of authors. For areas off the shelf, the relationships between physical environmental parameters and the benthic biota are more poorly known however geomorphic mapping provides insights into major processes that are likely to influence benthic habitats. The geomorphic mapping method presented here rapidly provides a layer to add to benthic bioregionalisation using readily available data and provides useful insights into seabed and oceanographic conditions that influence benthic communities, even in the absence direct measurements. The conclusion from this preliminary study of sea floor geomorphology from the Antarctic is that there is enough data to available already to produce a meaningful benthic bioregionalisation for an area as poorly known as the Antarctic continental margin and surrounding oceans. Studies of shelf biota that have tried to link the physical environment with benthic communities have found links strong enough to suggest that geomorphology is a useful first-pass tool for mapping the distribution of communities. The link between biology and geomorphology is the degree to which sea floor geometry influences oceanographic, biogeochemical and substrate processes to shape the conditions for benthic communities. Additional layers of bed shear stress and sediment characteristics will further refine benthic bioregionalisation when data become available however the results produced by mapping from bathymetry alone are sufficient to justify its use in the first stage of benthic bioregionalisation for CCAMLR waters

A collaborative project between Australian industry, the Australian Antarctic Division (AAD), Australian Fisheries Management Authority (AFMA), and the Fisheries Research and Development Corporation has been established to investigate the interactions between demersal fishing gears targeting Dissostichus spp. with marine benthos in the Australian EEZ of the Southern Ocean. Key outcomes of this project will include: • Compact camera systems which will be able deployed by scientific observers in the Convention area to quantify habitats types where fishing occurs • Identification of types and likely extent of interactions between different demersal fishing gears (trawl, longline, trap) with benthic communities around Heard and McDonald Islands (Division 58.5.2), and longlines on the Antarctic continental shelf • An assessment of the vulnerability of benthic habitats to impact by demersal gears in the Sub-Antarctic and high latitudes of the Southern Ocean • Recommendations for practical mitigation strategies to minimise fishing impacts on benthic communities Compact cameras have already been built and trialled on trawl on longline gear, and the footage captured indicates there is great potential for such systems to capture data to quantify interactions between demersal gears and the benthos in CCAMRL fisheries.

Conservation Measure 22-06 was adopted to ensure that significant adverse impacts of bottom fishing gear on Vulnerable Marine Ecosystems (VMEs) are avoided. In order to satisfy the requirements of CM 22-06 a method is proposed to notify CCAMLR of the presence of VMEs and their location using a simple pro-forma. Two VMEs identified during the Australian CEAMARC-CASO cruise are notified using this form from Statistical Area 58.4.1, SSRU H. The use of 5 nm buffer zones around the location of the observations is proposed to mitigate the risk of spatial uncertainty in the notified position and the deployment of bottom-fishing gear.