10 results

Workshop on stock assessment of Australia's tropical fisheries

Project number: 1991-096
Project Status:
Completed
Budget expenditure: $8,359.88
Principal Investigator: Rik C. Buckworth
Organisation: Department of Agriculture and Fisheries (NT)
Project start/end date: 31 Jul 1991 - 30 Jun 1993
:

Objectives

1. To conduct a workshop to provide fisheries research and management personnel, working on Australia's tropical stocks, with training and experience in various stock assessment techniques.
2. To apply these techniques to problem areas in the research and management of fisheries administered by the NT, or which are important to the NT and Northern Australia.
Adoption

Increasing the marketability of commercial northern shark by eliminating the incidence of tough flesh

Project number: 1993-190
Project Status:
Completed
Budget expenditure: $74,439.00
Principal Investigator: Steve L. Slattery
Organisation: Department of Agriculture and Fisheries (NT)
Project start/end date: 25 Sep 1993 - 30 Jun 1996
:

Objectives

1. To increase the marketability and value of the two major commercial species of northern shark by eliminating the incidence of toughness of flesh
Environment
PROJECT NUMBER • 2017-125
PROJECT STATUS:
COMPLETED

FishPath: Tailoring Management to Context in Data-Limited Fisheries

Fisheries are increasingly managed with involvement of fishers and other stakeholders. Stakeholders are especially critical where managers lack full knowledge of the system to be managed, resources to gather additional information, and/or resources to monitor and enforce compliance. Such...
ORGANISATION:
Department of Agriculture and Fisheries (NT)

SCRC: Improvements in Yellowtail Kingfish larval and juvenile survival and quality

Project number: 2009-749.30
Project Status:
Completed
Budget expenditure: $0.00
Principal Investigator: Michael Thomson
Organisation: Department of Agriculture and Fisheries (NT)
Project start/end date: 14 Jul 2008 - 29 Sep 2010
:

Need

Yellowtail Kingfish culture is a rapidly expanding industry in Australia, particularly in rural South Australia, where it is driving the increase in the ‘other’ category of aquaculture production from ~1100 tonnes valued at ~$9 million in 2002-03 to 2000 tonnes and $17 million in 2004-05 (ABARE, 2006). Regarding future production, CST alone are projecting an increase in annual production towards 8,000 T by 2015.

CST is the largest producer of Yellowtail Kingfish in Australia having produced over 1.25 M juveniles in 2007. The company operates two Yellowtail Kingfish hatcheries at Arno Bay and Port Augusta. The production of quality larvae from hatcheries underpins the production of farmed fish and low survival and high levels of malformations significantly increase costs.

Survival of Yellowtail Kingfish juveniles in Australian marine hatcheries is very low in comparison to many other marine species such as sea bass and bream produced in larger more mature industries, for example in Europe. Of particular note, several skeletal malformations have been reported in Australia and New Zealand, although few are well documented (Yellowtail Kingfish, Cobcroft et al., 2004).

There is also high variability in hatchery survival rates and the rate and severity of deformities among production runs and commercial hatcheries.

By way of illustration, the direct benefit to Clean Seas Tuna Ltd. of reducing malformations in Yellowtail Kingfish is estimated to be $1 million p.a. In this example a reduction in malformations from 40% to 20% (on 2.0 M juveniles before quality grading) could produce a further 400,000 good quality juveniles @ $2.50 (market value) = $1,000,000.

Environment
People
Environment

The pearl oyster (Pinctada maxima): a histological atlas of normal and diseased tissues

Project number: 1997-333
Project Status:
Completed
Budget expenditure: $45,000.00
Principal Investigator: Colin C. Shelley
Organisation: Department of Agriculture and Fisheries (NT)
Project start/end date: 7 Mar 1998 - 31 Aug 2008
:

Need

Pearl production accounts for more than half the value of the combined Australia aquaculture industries, yet little was understood of their health status prior to project no 94/79.

There is no text available which describes, the anatomy and histopathologically of the pearl oyster, Pinctada maxima , or the histopathological changes that occur with disease. This lack of published data is compounded by the fact that there are currently only 4 pathologists in Australia with significant experience and knowledge to interpret histology sections from pearl oysters.

The publication of the histopathology photographs collected during project no 94/79 plus other reference material collected by previous researchers will help to overcome this problem.

The ability to be able to recognise what is normal or abnormal is critical in the interpretation of histology sections and hence will affect the quality of diagnostic services that can be provided to the pearling industry.

The publication of this material will also act as a reference book for a range of other investigations into pearl oysters, such as, nutritional, husbandry and biology studies. It will ensure that the material gathered during project no 94/79 will be preserved for the future benefit of the pearling industry.

Objectives

1. Develop a comprehensive histological photographic database of the normal and diseased tissue of the pearl oyster Pinctada maxima .
2. Compile a computerised atlas showing the basic anatomy of Pinctada maxima with explanatory text and labelled photographs of normal and diseased tissue.
3. Publish this data in a book and/or compact disk format.
Environment
PROJECT NUMBER • 2000-142
PROJECT STATUS:
COMPLETED

Methods for monitoring abundance and habitat for northern Australian mud crab Scylla serrata

A significant achievement of this project has been the completion of mapping of coastal wetland habitats using remote sensing techniques, which provided a complete broad-scale coverage of mud crab habitats in the NT and Qld. A major outcome/output of this work has been the incorporation of the...
ORGANISATION:
Department of Agriculture and Fisheries (NT)
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