76 results
Environment
PROJECT NUMBER • 1995-039
PROJECT STATUS:
COMPLETED

Interim monitoring of the 1995 eastern gemfish spawning run

Historically, monitoring of the eastern gemfish stock has been based on sampling at NSW fish markets, and carried out by NSW Fisheries Research Institute as part of its NSWs management responsibilities for the fishery. With the advent of AFMA, however, responsibility for monitoring of the fishery...
ORGANISATION:
CSIRO Oceans and Atmosphere Cleveland
TAGS
Workshop
Stock Assessment
Reproduction
Market Opportunities
Fishing Effort
Environment
Environment
Environment
PROJECT NUMBER • 1993-238
PROJECT STATUS:
COMPLETED

Evaluation of harvesting strategies for Australian fisheries at different levels of risk from economic collapse

Management of a marine renewable resource involves selecting a trade-off between conflicting objectives related to conservation and utilization. This problem is complicated by uncertainty about the current status and productivity of the resource being managed, and hence about the implications of...
ORGANISATION:
CSIRO Oceans and Atmosphere Cleveland
TAGS
Sustainability
Stock Assessment
Reproduction
Modelling
Individual Transferable Quota
Environment
Adoption
Environment
Environment
Environment
Environment
Environment
Environment
PROJECT NUMBER • 1991-032
PROJECT STATUS:
COMPLETED

A comparison of otolith microchemistry and genetic techniques for evaluation of stock structure of the jackass morwong Nemadactylus macropterus

Four different techniques for determining the stock structure of a marine fish species were compared, using as a subject the jackass morwong. The four techniques examined were allozyme analysis, mitochondrial DNA analysis and two techniques based on measuring the composition of otoliths ('ear...
ORGANISATION:
CSIRO Oceans and Atmosphere Cleveland
TAGS
Stock Assessment
Population Dynamics
Fisheries Management
Distribution
Environment
Environment
Environment
Environment
Environment
Industry
Environment
Environment
PROJECT NUMBER • 1990-009
PROJECT STATUS:
COMPLETED

Development and use of the egg production method to assess the biomass of orange roughy off eastern Tas

Orange roughy is one of Australia's most valuable finfish However, its aggregating behaviour during spawning, slow growth, and longevity render it vulnerable to over-exploitation. Some stocks in New Zealand are at extremely low levels after only ten years of exploitation. Good management is vital...
ORGANISATION:
CSIRO Oceans and Atmosphere Cleveland
Industry
Environment
Environment
PROJECT NUMBER • 1989-030
PROJECT STATUS:
COMPLETED

Age determination and assessment of variation in length at age of large southern bluefin tuna by means of otolith and vertebral chemical composition

Patterns of ontogenetic variation in the composition of the otoliths of southern Bluefin tuna (SBT), Thunnus maccoyii, strongly suggested that the concentrations f some elements (and particularly strontium) varied episodically, and probably annually. This suggested that counting the numbers of peaks...
ORGANISATION:
CSIRO Oceans and Atmosphere Cleveland
Environment
PROJECT NUMBER • 1989-013
PROJECT STATUS:
COMPLETED

Causes of decline in stocks of commercially important prawns in the Northern Prawn Fishery

The following report is a description of the two FIRTA projects (85/85 & 89/13) which examined recruitment processes in penaeids at Albatross Bay in the northeastern Gulf of Carpentaria over the years 1985 to 1992. The aim of the first of the two projects was to identify the main factors which...
ORGANISATION:
CSIRO Oceans and Atmosphere Cleveland
Industry
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