Project number:
1987-015
Project Status:
Completed
Budget expenditure:
$0.00
Principal Investigator:
Ronald E. Thresher
Organisation:
CSIRO Oceans and Atmosphere Cleveland
Project start/end date:
28 Dec 1989
-
31 Dec 1989
Contact:
FRDC
1. Determine whether or not all juvenile southern bluefin tuna migrate down coast of WA, hence whether Aust fishery based on all or part of each cohort.
2. Validate ageing techniques for adults.
3. Are bays & estuaries in southern Tasmania the sole nursery grounds of jackass morwong?
Final report
Final Report
•
2017-09-29
•
27.79 MB
1987-015-DLD.pdf
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.
