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Environment
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PROJECT NUMBER • 2010-781
PROJECT STATUS:
COMPLETED

SCRC: PhD: Broodstock conditioning and maturation of sandfish (Holothuria scabra) and optimisation of spawning induction techniques.

This thesis reports on an investigation of brood stock conditioning methods for the tropical sea cucumber Holothuria scabra. The project aims to advance the field of sea cucumber aquaculture by developing improved methods for the conditioning and spawning of brood stock. There is great demand for...
ORGANISATION:
University of the Sunshine Coast (USC)
Environment
Industry
PROJECT NUMBER • 1986-010
PROJECT STATUS:
COMPLETED

Factors affecting the toxicity of the dinoflagellate, Gambierdiscus toxicus, and the development of ciguatera outbreaks

This project confirmed that the benthic dinoflagellate Gambierdiscus toxicus is an origin of putative ciguatoxin precursors called gambiertoxins. It was recently found in French Polynesia that gambiertoxins could be extracted from biodetritus containing wild G. toxicus and that gambiertoxins were...
ORGANISATION:
Department of Primary Industries (QLD)

The use of BRUVs as a tool for assessing marine fisheries and ecosystems: A review of the hurdles and potential

Project number: 2010-002
Project Status:
Completed
Budget expenditure: $30,000.00
Principal Investigator: Euan S. Harvey
Organisation: University of Western Australia (UWA)
Project start/end date: 14 Aug 2010 - 29 Nov 2010
Contact:
FRDC

Need

National reviews of Fisheries R&D needs (FRDC95/055) have identified the need for non-extractive, fishery-independent sampling and stock assessment techniques which are cost-effective, repeatable and robust across and range of habitats and depths. These methods are becoming increasingly important as Australian fisheries face the challenge of addressing ecosystem based fisheries management and climate change. A national workshop on the use of video for sensing the size and abundance of target and non-target fauna in Australian fisheries (FRDC2000/187) highlighted the potential for Baited Remote Underwater Video systems (BRUVs). After a decade, there has been wide adoption of this technique. However, differences in protocols for deployment, analysis and interpretation make spatial and temporal
comparisons of data difficult.

There is the need to develop a robust set of nationally agreed upon protocols to ensure that users are appropriately informed and trained through a comprehensive extension and capacity building program that also identifies key unresolved technical issues.

With the increased testing and use of BRUVs a number of independent developments have occurred. Future technological advances and more detailed statistical and modelling approaches will result in the BRUVs data being more useful for ecosystem assessment and management. Maximising the potential that these advances will provide to Australian fisheries will be achieved by a co-ordinated and
collaborative research strategy. We propose to host a two day workshop to critically evaluate the use of BRUVs as a data collection tool
for scalefishes and sharks. The workshop will identify the strengths, limitations and identify potential solutions.

Objectives

1. To critically evaluate the strengths and limitations of data collected with BRUVS for detecting changes in the relative abundance, length frequency and community composition of scalefishes and sharks.
2. To identify potential solutions to limitations.
3. To develop a nationally agreed to protocol for the deployment of BRUVs and the analysis of the resulting imagery.
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