153 results
Environment
Environment
Environment
Environment
Environment
PROJECT NUMBER • 1992-042
PROJECT STATUS:
COMPLETED

The direct estimation of age and growth of SBT

This project was developed in response to calls from the SBT Trilateral (now the CCSBT) Scientific Committee for the development and validation of techniques for the direct estimation of age and growth in the species. Since the early 1980’s, the stock assessment methods used by...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
TAGS
Tagging
Stock Assessment
Reproduction
Mortality
Fishing Gear
Environment
PROJECT NUMBER • 1994-021
PROJECT STATUS:
COMPLETED

Radiometric aging of sharks

Determining the age of sharks is difficult. A reliable independent method of validating age estimates is needed, apart from relying on tag return data. The success of radiometric analysis for bony fish overseas and in Australia suggested that it would be worth trying the method on sharks. Four...
ORGANISATION:
University of Tasmania (UTAS)
TAGS
Ageing
Environment
PROJECT NUMBER • 1991-037
PROJECT STATUS:
COMPLETED

Southern shark age validation

Gummy sharks and school sharks are aged by counting growth-increment bands on the articular faces of vertebrae stained with alizarin red. The age data are required for application of age-structured fishery assessment models used by the Southern Shark Fishery Assessment Group for stock advice to the...
ORGANISATION:
Agriculture Victoria
TAGS
Stock Assessment
Recreational Fishing
Habitat
Fishing Gear
Fisheries Management
Environment
Environment
PROJECT NUMBER • 1985-076
PROJECT STATUS:
COMPLETED

Otolithic age determination of mature southern bluefin tuna (Thunnus maccoyii)

Otoliths of Southern Bluefin Tuna (Thunnus maccoyii) taken from waters off New South Wales, South Australia, and Western Australia, of between 42 cm and 167 cm F.L. were prepared to reveal annual banding. Methods of preparation and examination are detailed. Otolith growth was demonstrated to be...
ORGANISATION:
John Thorogood
TAGS
Ageing

Parameters for stock yield assessments in the developing orange roughy and blue grenadier fisheries

Project number: 1984-051
Project Status:
Completed
Budget expenditure: $0.00
Principal Investigator: Maria Casimaty
Organisation: Department of Natural Resources and Environment Tasmania (NRE TAS)
Project start/end date: 27 Jun 1987 - 29 Jun 1987
Contact:
FRDC
TAGS
Stock Assessment
Mortality
Ageing

Objectives

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
View Filter

Research

Category

Species

Organisation