10 results

Water abstraction impacts on flow dependent fisheries species of the Northern Territory, Australia - a synthesis of current knowledge and future research needs

Project number: 2021-114
Project Status:
Completed
Budget expenditure: $101,740.68
Principal Investigator: Kaitlyn O'Mara
Organisation: Griffith University Nathan Campus
Project start/end date: 30 Jul 2022 - 30 Jul 2023
Contact:
FRDC
TAGS
Rac Nt
Ecosystem

Need

The tropical waters of northern Australia contain unique and diverse aquatic species that are adapted to the seasonally variable climate. Many species rely on seasonal river flows to move, forage, reproduce and fulfil critical life history stages, particularly in ephemeral rivers which become disconnected in the dry season. River flows and harvest are known to influence both freshwater and marine fish and fisheries. However, river flows have been modified in several tropical catchments by water abstraction and development of water storage infrastructure for agriculture and drinking water. Additionally, there is increasing pressure to develop new water resource infrastructure in northern Australia. A large and disparate body of literature exists that has documented the relationships between tropical fish species and the seasonal variations in river flow. Production of several commercially, recreationally, and traditionally important tropical aquatic species is linked to flow, suggesting that these may be at risk from the multiple pressures of water abstraction and harvesting, warranting the need for a synthesis of current knowledge on water abstraction impacts and identification of knowledge gaps for targeted future research.

We will address this priority task through the delivery of a stakeholder targeted synthesis of current knowledge on the impacts of water abstraction on tropical aquatic species by a team of recognised experts who have worked extensively on the flow dependence of tropical aquatic species in northern Australia. Through this synthesis, we aim to increase stakeholder understanding of water abstraction impacts on aquatic species.

Objectives

1. Determine key directives for the synthesis during initial meeting in Darwin with the NT government research advisory committee
2. Review and synthesise relevant grey and published literature
3. Identify potential risks of surface water abstraction on priority fish species and identify critical knowledge gaps and future research needs
4. Share the outcomes with project stakeholders and provide research advice

Final report

Authors: Kaitlyn O’Mara Leah Beesley Keller Kopf Michele Burford Michael Douglas Ben Stewart-Koster Mark Kennard
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.

Project products

Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Final Report • 2023-12-12 • 14.77 MB
2021-114-DLD.pdf

Summary

This project synthesised information that could be used to help guide decision making around the protection of fisheries species that may be impacted by water abstraction. This review was led by Griffith University and conducted in collaboration with the University of Western Australia, Charles Darwin University, and the Northern Territory Fisheries. The synthesis of existing information on the impacts of water abstraction found substantial evidence for impacts on some species and large gaps in the research literature for others. The reviewed studies showed that the severity of predicted impacts varies between river systems and between different modes of water abstraction, as well as with different timing, magnitude, and thresholds of water take. The collective results of these studies modelling potential impacts of water abstraction warrant a precautionary approach to setting water takes, with particular emphasis on ensuring the continuation of high flow years which disproportionately support fishery biomass. It is recommended that the flow dependencies of these species be carefully considered when implementing water policies and research be conducted to fill knowledge gaps for species where little is known about their dependency on the natural flow regime.
Fact Sheet • 2023-12-12 • 4.17 MB
2021-114 Fact Sheet.pdf
Data • 58.89 KB
2021-114 Evidence Table NT fisheries species Aus research - FRDC project 2021 114 - OMara et al.xlsx
Industry
Industry
PROJECT NUMBER • 2018-118
PROJECT STATUS:
COMPLETED

Reinvigorating the Queensland Oyster Industry

The overall objective of this study is to provide critical background knowledge to support the reexpansion of Queensland oyster aquaculture, which has been experiencing low levels of production since the 1920s. Once the epicentre of the oyster industry in Australia (Schrobback, 2015),...
ORGANISATION:
Griffith University Nathan Campus
TAGS
Wild Catch
Stakeholder
Rac Qld
Mortality
Husbandry
SPECIES
Oysters

Atlantic Salmon Aquaculture Subprogram: Mitigation of climate change effects on salmon broodstock: effects of estrogen therapy

Project number: 2009-085
Project Status:
Completed
Budget expenditure: $54,000.00
Principal Investigator: Ned Pankhurst
Organisation: Griffith University Nathan Campus
Project start/end date: 7 Apr 2010 - 30 Dec 2010
Contact:
FRDC
TAGS
Sustainability
Recreational Fishing
Fisheries Management

Need

Strategic R & D Plan
This proposal fits within the Salmon Aquaculture Subprogram

As a result of FRDC project 2008/217 (The effect of temperature on reproductive development in maiden and repeat spawning Atlantic salmon: understanding the basis for improved egg quality and survival) and a series of earlier studies we know that:

The effect of elevated summer and autumn temperature in inhibiting reproduction in Tasmanian Atlantic salmon broodstock is consistent and potentially profound. Maidens (first spawning fish) and repeats are both affected but repeats are more robust in terms of their capacity to cope. Maidens are a slightly better proposition than repeats in terms of egg quality and survival but only provided that they can be kept cool during summer and autumn.

The inhibitory effects of temperature on reproduction are mediated through the endocrine (hormonal) system.
All parts of the endocrine chain appear to be potentially affected but by far the most sensitive stage is the aromatase-mediated production of estrogen by the ovary. Our experiments have shown that management of aromatase inhibition is the key step in offsetting the effects of high temperature.

Management options are currently limited to managing temperature of broodstock. This approach assumes that the temperature-controlled holding capacity is large enough (or never fails). There is still a strong need for a hormone therapy option as an additional management strategy. Preliminary experiments with juveniles have shown that the fish stay responsive to external estrogen at high temperature. This means that treatment of adults with estrogen at critical periods is a strong candidate for hormone therapy.

Benefit
SALTAS modelling indicates that the current direct effect is a loss of smolt production of ~$250,000 and potential industry production shortfall of ~$20million per annum. This assumes that thermal effects in autumn do not get any worse.

Objectives

1. Development of a protocol for treating maiden fish held at 22oC in autumn with silastic implants containing estrogen to artificially raise plasma estrogen levels.
2. Assessment of the effect of elevated plasma estrogen levels on estrogen-dependent gene expression, plasma vitellogenin levels, egg size fertility and survival.
3. On the basis of the outcomes from objectives 1 and 2, refinement of the treatment protocol for use in larger scale industry settings as a second tier tool for the mitigation of thermal stress in broodstock.

Final report

ISBN: 978-1-921760-35-8
Author: Ned Pankhurst
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Final Report • 2011-04-05 • 494.79 KB
2009-085-DLD.pdf
Industry
Environment
Environment
Environment
PROJECT NUMBER • 1999-217
PROJECT STATUS:
COMPLETED

Stable isotope tracing of the contribution of seagrass production to subtropical fisheries species occurring outside seagrass areas

Results from this project affect the relative importance coastal managers will place on different estuarine habitats. Until now primary production from mangrove forests has been ranked highly for its presumed contribution to fisheries species occurring seaward of mangroves. This project...
ORGANISATION:
Griffith University Nathan Campus
TAGS
Sustainability
Offshore
Laboratory Procedures
Inshore
Habitat
SPECIES
Spanish Mackerel
Sea Mullet
Tailor
Sand Whiting
Blue Swimmer Crab
Environment
Environment
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Category

Species

Organisation