The only national estimate of bycatch and discarding for Australia’s fisheries suggests that our fisheries discard more than they retain (ie. 55.3% is discarded - FAO, 2005). This figure may surprise many people including environmental groups, those concerned with "sea"-food security and protein-poor countries. This figure also has the potential to adversely affect Australia’s well-earned brand as a responsible fisheries management nation. However - this figure is probably very wrong and much too high. This project aims to correct this.

In 2012, Australia completed its first national report describing the status of Australia’s fish stocks (“Status of Key Australian Fish Stocks Reports”). An issue that arose during its preparation (from AFMF, DAFF, DoE and others) was that there exists no national system for reporting on bycatches or discards. That is, there exists no mechanism by which the public, governments, NGOs, ecolabels, other stakeholders or international agencies can assess Australia’s performance in dealing with bycatch, discards, TEPs interactions, etc.

A recent study (extension to FRDC 2013/233) summarized the recently completed US National Bycatch Report and other similar international reports (FAO’s 1994 and 2005 global reports), investigated future FAO initiatives in this area (FAO are currently planning a decadal repeat of the global report), benchmarked the current Australian situation against these, and recommended a pathway towards an appropriate national bycatch reporting system. That pathway recommended a comprehensive synthesis of available bycatch information available in Australia and the development of a repeatable reporting system, running as an adjunct to the current SAFS system, against which Australia’s record in bycatch management can be assessed against agreed best-practice benchmarks. This project aims to deliver such a system.

The Giant Cuttlefish population in Spencer Gulf is the largest in the world and is highly valued by local residents, the tourism industry and the recreational diving sector. But surveys over the last 13 years has indicated that the northern population has, and continues to, decline markedly - leading to major public consternation.

The Spencer Gulf Prawn Fishery is known as one of the best managed trawl fisheries in the world and is permitted to only land three species, the western king prawn, bugs and southern calamari

A recent SARDI study correlated the observed decline in Cuttlefish abundances with a range of potential factors including: water temperature, weather, pollution (including those from increased shipping activities), predators, prey, habitats, diseases, fishing pressure and tourism. Of these, rainfall was the only factor found to correlate inversely with peak cuttlefish abundance. The study noted the incidental capture of Giant Cuttlefish in the Prawn Fishery but found no clear association between the decline in cuttlefish and fishing intensity. The study noted a positive correlation between trawl effort and the size of the cuttlefish population but this relationship is counter-intuitive and is likely to be coincidental. The evidence therefore does not support an assertion that the recent decline in the abundance of Giant Cuttlefish in northern Spencer Gulf has been caused by prawn trawling or any other forms of fishing.

Nevertheless, due to the low population numbers, all sources of potential mortality of cuttlefish, including that from prawn trawl bycatch, need to be minimized urgently and carefully managed. This project is focused on an attempt to reduce the bycatch of cuttlefish in this fishery using modifications to the trawls used (termed ‘bycatch reduction devices’ or ‘BRDs’). If successful, such BRDs should be suitable for use in locations and at times where cuttlefish bycatches are significant.