8 results
Industry
PROJECT NUMBER • 2017-048
PROJECT STATUS:
COMPLETED

Improving mortality rate estimates for management of the Queensland Saucer Scallop fishery

This research was undertaken on the Queensland saucer scallop (Ylistrum balloti) fishery in southeast Queensland, which is an important component of the Queensland East Coast Otter Trawl Fishery (QECOTF). The research was undertaken by a collaborative team from the Queensland Department...
ORGANISATION:
Department of Primary Industries (QLD)
Environment
PROJECT NUMBER • 1997-139
PROJECT STATUS:
COMPLETED

Mesoscale oceanographic data analysis and data assimilative modelling with application to Western Australian fisheries

The more that is understood about the factors controlling the abundance of an exploited fish stock, the more optimally it can be harvested for sustainable yield and profit. It has been known for some time that catches of western rock lobster are closely related to the number of larvae surviving...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Industry

Physical oceanographic influences on Queensland reef fish and scallops

Project number: 2013-020
Project Status:
Completed
Budget expenditure: $170,000.00
Principal Investigator: Tony J. Courtney
Organisation: Department of Primary Industries (QLD)
Project start/end date: 23 Jun 2013 - 29 Mar 2015
Contact:
FRDC

Need

There is a strong need for Queensland fishery managers to obtain a better understanding of key physical oceanographic influences on target species of commercial and recreational fisheries.

Tropical cyclones have been associated with reef fish catch rates. Coral trout (Plectropomus leopardus) catch rates typically fall after a major cyclone, while those of red throat emperor (Lethrinus miniatus) rise (see “Background” above). The effects on catchability can last several years. While the exact causal mechanism is not known, it is thought to be related to water temperature.

Nutrient-rich cold water eddies, which break from the East Australian Current and move westward onto the Queensland continental shelf are likely to affect the spat settlement, growth, abundance and catch rates of saucer scallop (Amusium balloti). Understanding these relationships may lead to improved management, assessment and forecasting of catch in these fisheries, and it may also lead to improved acceptance of quantitative stock assessment results by industry.

This proposal differs from previous abiotic studies because it focuses more on offshore, oceanic influences, rather than coastal rainfall and flow data.

Objectives

1. Review recent advances in the study of physical oceanographic influences on fisheries catch data, and describe the major physical oceanographic features that are likely to influence Queensland reef fish and saucer scallops.
2. Collate Queensland’s physical oceanographic data and fisheries (i.e., reef fish and saucer scallops) data.
3. Develop stochastic population models for reef fish and saucer scallops, which can link physical oceanographic features (e.g., sea surface temperature anomalies ) to catch rates, biological parameters (e.g., growth, reproduction, natural mortality) and ecological aspects (e.g. spatial distribution).
Industry
PROJECT NUMBER • 2017-057
PROJECT STATUS:
COMPLETED

Stock predictions and spatial population indicators for Australia's east coast saucer scallop fishery

This project undertook analyses to understand the role of overfishing and the environment on saucer scallops. The analyses indicated reduced numbers of spawning scallops. Historical levels of fishing and environmental influences such as from increased sea surface temperatures (SST) have amplified...
ORGANISATION:
Department of Primary Industries (QLD)
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