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Abundance estimates are used both directly and indirectly in stock assessment processes to support fishery management. Australia’s fisheries research agencies all estimate fish population abundance in some way. These include genetic and conventional tagging, acoustics (active and passive), trawl and egg surveys, as well as using proxies of abundance such as catch. Each of these methods have benefits, biases and caveats linked to the method and to the fish species being assessed. For example, differences between life history and habitat can make an abundance estimation method that has worked for one species unsuitable for another. As the application of each method of estimating abundance is potentially species/scenario specific, potential use by researchers and managers can be fraught.

In developing or proposing an abundance estimate for use in fisheries assessment, researchers must have a clear understanding of the assessment framework in order to make sure that an abundance estimate can be used. Claims such as “this time series can then be used in stock assessment” must be verified by funding agencies (particularly beyond FRDC) and defensible. Proliferation of abundance estimation methods without links to the assessment process will not yield an expected benefit beyond knowledge accumulation.

A project is needed to capture the range of methods of estimating abundance for management purposes, and specify the conditions of use, limitations and readiness level for operational use. A decision tree and methods ‘toolbox’ that describes the techniques, their relative strengths and weaknesses will help researchers and managers identify the best suited abundance estimate approach, and guide research effort to overcome known weaknesses.

The development of a ‘toolbox’ of techniques would be used to inform:
1. techniques available to estimate abundance
2. suitability of them to different conditions such as life history, and data availability
3. requirements of the technique such as methods used, prerequisite expertise, data and cost; and
4. circumstances under which the technique can be used.
This project would also identify potential new approaches and technologies that might complement or replace current ones.

Stock Assessment remains a key component of fisheries management. The pool of Australian scientists that practice in this field is well respected globally. However, this community is generally dispersed, both in terms of organisational structure and geography. Opportunities to share skills and common issues on a regular basis, including discussions on new developments in the field, are often lacking. Previous projects on stock assessors’ use of bespoke models versus packages have shown that lack of knowledge of available off-the-shelf packages and their specifications was a key roadblock to adoption of these methods. The new Stock Assessment Toolbox web-site (toolbox.frdc.com.au) goes some way to address this issue by providing a single repository for globally developed packages. Another barrier was knowledge on how to use these packages, which was partially addressed through subsequent courses on data-limited methods and the Stock Synthesis assessment framework. Although these incorporated advances in the field, there is still a large gap in terms of adoption – not only of packages but of new techniques, sharing our own advances with the world and vice versa. There is a need to understand the influencers (both human and in terms of scientific practices) in this field, both in Australia, and from the international world into Australia. This requires bringing past projects together and adding new skills to fisheries assessors to facilitate and further a strong sense of connection and a community of practice within the field, and with other related fields. This work is aimed at helping assessors gain and share skill and knowledge amongst each other through understanding their impediments and drivers. The project will create a roadmap for the next generation of assessors and methods.

With the impending wind up of Wildcatch Fisheries SA, it is timely to firstly, assess the need for a new peak industry body, and secondly, as part of that assessment, acknowledge the role of existing structures for consultation and representation at the individual fishery sector. For example, there are management advisory committees for a number of fishery sectors, along with tasked working groups to deal with specific fishery management issues, such as the development and implementation of harvest strategies and reform of the Marine Scalefish Fishery.

It is important to recognise that South Australia already has sound legislation in place (Fisheries Management Act 2007 – although it may need review and updating); it also has considerable regulation in support of the Act, along with management plans for individual fisheries – most of which have recently been reviewed and updated, including the incorporation of updated harvest strategies. Finally, SA has key policies in place covering:

 Co-management
 Allocation
 Harvest Strategy Development