1. Determine size(age) at capture for the main commercial species in the SEF that would maximise their biologic and economic yield, especially for the quota species.
2. Determine selectivity of the major fisheries in the SEF, taking account of the mix of gear types and the areas fished.
3. Evaluate success of alternative gear mixes (type and configuration) in maximising overall biologic and economic yield for selected fisheries.
4. Identify fisheries that contain mixes of gear types and species that lead to a grossly undesirable selectivity of some species, and that could profit from the development of specialised selective techniques
5. Help to coordinate and present results at SEFAG workshop to assess the potential of adapting selectivity of the SEF to promote sustainabilty and economic returns.
At the time this report was written, there had not been any biological study of the whitebait fishery since the 1940's. That study concentrated on the species most abundant at that time (Lovettia sealii). However, with the decline in the fishery being essentially due to a decrease in abundance of...
(1) To enable assessment reporting of trends in biomass and egg production by depth.
(2) To evaluate separate deep-water quota to increase yield and egg production.
(3) To evaluate regional size limits in Tasmania for increase in yield and egg production.
(4) To conduct field...
Translocation involves the shifting of undersize rock lobsters to new areas to increase productivity and/or quality of product. We modelled the translocation of rock lobsters from four original sites to four release sites with a range of growth rates.
Most model scenarios led to increases in...
This report outlines an operational procedure for the cooking of P. monodon. It discusses critical control points within the process and gives an indication of best practices. The work conducted should be considered as a snap shot of the process and used as a starting point for further...
1. Determine, for both orange roughy and blue grenadier, age and age/length relationships, age at recruitment and maturity, and estimates of total mortality from which natural mortality may be estimated
The primary goal of this research was to identify attributes of the seasonal biology of Blacklip Abalone (Haliotis rubra; hereafter referred to as Blacklip) that may be beneficial for optimising fishing strategies. The optimum months to harvest Blacklip to maximise yield were identified using a...