PROJECT NUMBER
•
1988-041
PROJECT STATUS:
COMPLETED
ORGANISATION:
Department of Natural Resources and Environment Tasmania (NRE TAS)
6 results
PROJECT NUMBER
•
1980-016
PROJECT STATUS:
COMPLETED
ORGANISATION:
Department of Natural Resources and Environment Tasmania (NRE TAS)
Jack mackerel assessment in south-east Australian waters
Project number:
1988-039
Project Status:
Completed
Budget expenditure:
$242,073.00
Principal Investigator:
Howel Williams
Organisation:
Department of Natural Resources and Environment Tasmania (NRE TAS)
Project start/end date:
28 Jun 1990
-
31 Aug 1992
Contact:
FRDC
1. Develop indices of abundance to enable appropriate annual TACs to be set.
2. Describe and assess the potential for viability in jack mackerel stocks caused by environmental factors.
3. Collect data on the breeding behaviour and early life history.
An assessment of the orange roughy resources off the coast around Tasmania
Project number:
1987-065
Project Status:
Completed
Budget expenditure:
$137,388.00
Principal Investigator:
Jeremy Lyle
Organisation:
Department of Natural Resources and Environment Tasmania (NRE TAS)
Project start/end date:
28 Jun 1990
-
31 Dec 1990
Contact:
FRDC
1. Determine abundance orange roughy on continental slope (800-1200m deep) around Tas (occurrence, size, distribution of spawning & non-spawning aggregations).
2. Establish potential sustainable yield.
3. Study life history, population parameters. Determine distribution & abundance other commercially important spp same depth off Tas
Final report
Enhancement and monitoring of a developing sea urchin fishery
Project number:
1987-063
Project Status:
Completed
Budget expenditure:
$0.00
Principal Investigator:
Christine D. Crawford
Organisation:
Department of Natural Resources and Environment Tasmania (NRE TAS)
Project start/end date:
27 Jun 2000
-
30 Jun 2000
Contact:
FRDC
Resource monitoring of the jack mackerel purse seining fishery in south-eastern Australia
Project number:
1985-077
Project Status:
Completed
Budget expenditure:
$0.00
Principal Investigator:
Howel Williams
Organisation:
Department of Natural Resources and Environment Tasmania (NRE TAS)
Project start/end date:
28 Dec 1988
-
31 Dec 1988
Contact:
FRDC
TAGS
1. Maintain log book system to monitor catch & effort. Shipboard measuring program for size & age composition of commercial catch. Determine a current age/length key, effective age of recruitment. Obtain estimates of total mortality ... fishing & natural faca
Final report
Author:
Howel Williams
Grant Pullen
Gwiedo Kucerans
Carl Waterworth
Final Report
•
2011-08-01
•
5.17 MB
1985-077-DLD.pdf
This program has collected data on the development and performance of the fishery, as well as biological data relevant to assessment of the impact of fishing on the exploited population.
The development and operation of the fishing and processing sectors of the fishery are described as are the development and implementation of jack mackerel management in Tasmania.
Biological data presented for jack mackerel include size structure of catch, length-weight relationships, catch age structure and reproductive development Estimates for the Von Bertalanffy parameters L∞, K and t0 are resented. Problems encountered estimating mortality rates are discussed and preliminary estimates given.
The bycatch species redbait, Emmelichthys nitidus, and blue mackerel, Scomber australasicus, make up approximately 5% of the landed catch. Some biological information on these two species is also presented.
The discovery of several adult Peruvian jack mackerel Trachurus murphyi raises questions as to the importance of this species, if any, in the fishery. These samples constitute the most westerly reports of this species distribution.
The importance of inter-annual variability in this fishery is discussed with reference to examples in the short history of the fishery.
