23 results
Environment
PROJECT NUMBER • 1986-045
PROJECT STATUS:
COMPLETED

Assessment of demersal fish resources of the south western sector

Catch statistics for 13 species from commercial and research trawls conducted between 1979 and 1984 in the southern areas of the South-East Trawl fishery are examined. Catch and catch per swept area from demersal trawls were stratified by position, depth and month and shots were subsequently...
ORGANISATION:
Department of Natural Resources and Environment Tasmania (NRE TAS)
TAGS
Stock Assessment

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
:
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
Environment
Industry
PROJECT NUMBER • 1983-052
PROJECT STATUS:
COMPLETED

Feasibility assessment of commercial production of two important shellfish (abalone and scallops)

This report concludes investigations into the economic and biological viability of scallop culture in Tasmania. Research into spat settlement and ongrowing methods has continued from the 1970's and the current TFDA and FIRTA funded programmes (1980-84) have successfully cultured scallops to legal,...
ORGANISATION:
Department of Natural Resources and Environment Tasmania (NRE TAS)
TAGS
Stock Assessment
Environment
Environment
Environment
PROJECT NUMBER • 1985-053
PROJECT STATUS:
COMPLETED

The development of an index for the prediction of catches of blacklip and greenlip abalone, and a technique for ageing these species

The scientific literature has generally accepted that abalone populations are characterised by low levels of settlement and recruitment (Tegner in press), that mortality is relatively low (Doi et al. 1977; Beinssen and Powell 1979; Sainsbury 1982; Shepherd et al. 1982; Fournier and Breen 1983) and...
ORGANISATION:
Department of Natural Resources and Environment Tasmania (NRE TAS)
TAGS
Stock Assessment
Environment
Environment
Industry
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