Demersal scalefish species account for between 11 and 17% of the total catch composition of the Western Australian Temperate Gillnet Fishery (1994 to 1999). Scalefish landings for 2005/06 amounted to 236t in the JASDGDLMF and the WCDGDLMF.
While demersal scalefish are a legitimate component of the catch, strong concern has been raised by the recreational sector, that considerable numbers of scalefish are dropping out of commercial gillnets, particularly iconic species such as West Australian Dhufish (Glaucosoma hebraicum), Blue Groper (Achoerodus gouldii) and Snapper (Pagrus auratus). As a result of this perception, conflict between recreational and commercial sectors has escalated substantially over the last five years.
In light of recent restrictions on recreational bag limits for iconic WA finfish such as G. hebraicum and P. auratus, the issue of scalefish ‘dropouts’ from commercial gillnets raises concern with respect to the catch efficiency and the ability of nets to retain demersal scalefish. The issue has the potential to negatively impact upon the security of future commercial access to the fishery.
Quantifying the number of scalefish that encounter nets, identifying species vulnerable to dropout and knowing where and when they are more likely to drop out of commercial gillnets (alive and dead) will complement existing catch composition data obtained by the DoF.
The WA Demersal Gillnet and Demersal Longline Association encourage the implementation of initiatives consistent with the principles of ecological sustainable development. Professional fishermen have expressed a willingness to investigate the claims of high dropout rates of finfish from gillnets, ensuring catch rates are sustainable and improving the public’s perception of the fishery. As the fishery is now undergoing pre-assessment for Marine Stewardship Council (MSC) certification, the need for accurate data to determine if demersal scalefish are dropping out of demersal gillnets is critical for an informed risk assessment of this fishery.
