Tag lottery for southern bluefin tuna
Final report
Development of more efficient traps for the North West Shelf fishery
Final report
the causes of differences in effectiveness.
2 Fish entry and escape probabilities are correlated across trap designs. The probabilities
are very high for '0' and 'S' trap designs and are much lower for the 'Z' design. Traps
with high entry and escape probabilities are best for a fishing strategy based on short
soak times, while traps with low probabilities are best for strategies using long set
times. 'Z' traps provide a greater catch per set than 'S' traps for soaks longer than about
4 h, while 'S' traps provide better catches for soaks shorter than about 4 h.
Guide to the sharks and rays of Australia
Analysis of Taiwanese gill net data
Final report
The effects of cyclones on the seagrass communities and penaeid prawn stocks of the Gulf of Carpentaria
Determination of the migration patterns of juvenile southern bluefin tuna and jackass morwong
Final report
This project reports on:
1) our detailed evaluation of current methodologies for otolith chemical analysis, and our recommended procedures when electron probe microanalysis is used for stock delineation in finfish
2) our assessment of the accuracy and precision of otolith probe microanalysis relative to the scales of natural variability in otolith composition, and an evaluation of the extent to which such variability reflects changing environment conditions
3) a direct test of the hypothesis that SE Tasmanian bays are the sole nursery area for Jackass Morwong
4) an evaluation of the likelihood of more than one spawning area/migration route for southern Bluefin Tuna.
Northern shark tagging study
Final report
In 1982, CSIRO applied to the Fishing Industry Research Trust Account for funding of a joint biological investigation of northern Australian pelagic fish stocks. At that time these stocks supported a Taiwanese surface gill-net fishery based on sharks, tunas and Spanish mackerel.
During the 1970's the total annual catch taken by the Taiwanese fishery from the area between northern Australia and Papua New Guinea averaged about 25,000 tonnes live weight. With declaration of the Australian Fishing Zone (AFZ) in 1979 the fishery came under Australian jurisdiction and management measures were introduced.
This study was initiated because of mounting government concern over the lack of research into the fishery, and because of increasing interest by industry in Australian exploitation of the resource. The program was a joint undertaking between CSIRO, the Commonwealth Department of Primary Industry and the State Fisheries of Queensland, Western Australia and the Northern Territory. The program aimed to provide information on the stock structure, migration, age and growth, recruitment and mortality of the principal species, and to examine the yield potential of the stocks and the potential for increased Australian participation in the fishery. It was particularly important to know whether the target species comprised single stocks or a number of discrete stocks across northern Australia. This information has implications for management of the foreign and domestic fisheries.