PROJECT NUMBER
•
2019-077
PROJECT STATUS:
CURRENT
ORGANISATION:
Salmon Tasmania
SPECIES
41,846 results
Development of a seafood catering manual
Project number:
1991-087
Project Status:
Completed
Budget expenditure:
$23,131.00
Principal Investigator:
Kevin Smith
Organisation:
Department of Primary Industries (QLD)
Project start/end date:
31 Jul 1991
-
30 Jun 1993
Contact:
FRDC
1. To provide a manual for restaurant/catering and institutiional cooking to encourage better use and handling of seafood
2. To encourage greater use of low $ value species that would be suitable for institution food service.
3. To provide information on local alternatives to imported fish lines.
4. To provide a comprehensive list of Australian species suitable for use in food service.
5. To provide training and information in seafood handling that is available to all staff.
PROJECT NUMBER
•
2019-051
PROJECT STATUS:
CURRENT
Examining the potential impacts of seismic surveys on Octopus and larval stages of Southern Rock Lobster
This report details the portion of FRDC 2019-051: Examining the potential impacts of seismic surveys on Octopus and larval stages of Southern Rock Lobster focusing on the impacts of exposure to a full-scale seismic survey on the early life stages of the Southern Rock Lobster (Jasus edwardsii),...
ORGANISATION:
University of Tasmania
SPECIES
Spatial interactions among juvenile southern bluefin tuna at the global scale: a large scale archival tag experiment
Project number:
2003-002
Project Status:
Completed
Budget expenditure:
$1,206,055.00
Principal Investigator:
Marinelle Basson
Organisation:
CSIRO Oceans and Atmosphere Hobart
Project start/end date:
18 Jun 2003
-
30 Apr 2011
Contact:
FRDC
SPECIES
The SBT resource is estimated to be at historically low levels and biological concerns exist about the status of the stock (Anon. 1998, 2001). There is also large uncertainty about the sustainability of current catches. The advice from the CCSBT Scientific Committee’s stock assessment in 2001 was that under current catch levels there was a ~50% chance that the stock would continue to decline or increase. The 2002 CCSBT Scientific Committee concluded that there was no basis for changing its previous advice on catch levels. The current management practice in the CCSBT is based on a global total allowable catch (TAC) with no consideration or restriction on where the catch is taken. Genetic studies, along with the fact that there is only one known SBT spawning ground, have led to the conclusion that SBT comprises a single reproductive stock. However, tag return and catch distribution data suggest that there may be substantial spatial structuring and incomplete mixing of SBT among the major feeding areas. Spatial structuring of the stock would have large implications for SBT assessments and for managing the rebuilding of the SBT resource. The combined results from the SRP conventional tagging program and this proposed archival tagging project would provide the basis evaluating the need for and, if necessary for developing, spatially-explicit population assessment and management response.
There is a critical need for direct and improved estimates of juvenile fishing mortality rates (or equivalently recruitment) to reducing uncertainty in the stock assessments and to provide a robust evaluation of the sustainability of recent catch levels. The SRP conventional tagging program is intended to provide this information. However, in order to achieve this objective, it is essential that sufficient information is available to account for incomplete mixing and the spatial dynamics of SBT in the analyses of the results from the conventional tagging data.
Catch-per-unit-effort (CPUE) indices are used to provide stock indicators of trends in the SBT stock size and form an essential input into the analytical stock assessment models. Interpretation of CPUE data is complicated by spatial and temporal variation in the availability and catchability of SBT in relationship to fishing effort. Interpretation of catch rates has been and continues to be a major source of uncertainty in the SBT stock assessment. The CCSBT Scientific Committee have repeatedly identified the need to develop alternative approaches for modeling and interpreting the SBT catch and effort data and this need has been incorporated into the agreed CCSBT SRP. Both availability and catchability are expected to vary with environmental conditions that modify the habitat suitability for SBT. Information for habitat-specific CPUE standardization was recognized as an important alternative approach for modeling catch rate data at the last CCSBT Scientific Committee meeting. This standardization approach takes into account changes in environmental conditions so that CPUE indices reflect the actual SBT habitat. This should allow the indices to more clearly reflect the actual changes in the abundance of SBT. This is especially critical as CPUE indices are seen as providing one of the key inputs in the decision-rule-based management procedure under development by the CCSBT. Thus, it is essential that to the extent possible that the CPUE indices provide a reliable indication of shorter term trends and that the CPUE signal is not confounded by short-term environmental fluctuations. Archival tags provide a unique tool for collecting the required habitat-specific requirements of SBT. Without such data, these habitat based standardization approaches are intractable. For example the archival tag data on vertical and horizontal distribution allow habitat preferences to be estimated, and CPUE standardization is possible.
In summary, this project aims to provide information to provide a substantial improvement in our current understanding of SBT movements and spatial dynamics. In particular, the proposal has been developed in response to three specific needs for an improved understanding of SBT spatial dynamics:
1. Estimation of mixing rates for the estimation of mortality rates from conventional tagging (particularly in the context of the large scale juvenile tagging program which is a high priority component of the CCSBT Scientific Research Program);
2. Habitat definition to allow the standardization of CPUE indices for use in the CCSBT stock assessment process; and
3. Requirements within the guidelines under the strategic assessment provisions of the Environmental Protection and Biodiversity Conservation Act 1999 that “the distribution and spatial structure of the stock(s) has been established and factored into the management response”.
In addition to these three specific needs, there is a general need to ensure that the current stock assessment models are robust to their implicit assumptions about spatial homogeneity.
1. Tag 150-200 juvenile SBT/year for 3 years with archival tags throughout the full range of spatial habitats in order to provide a comprehensive understanding of their spatial dynamics
2. For each tag returned (expected to be ~ 20-30%) estimate daily positions based on the stored light and temperature data and develop a database for the storage and analysis of all relevant location, temperature and depth data
3. Provide a comprehensive analysis of the evidence for temporal changes in the spatial dynamics of juvenile SBT and analyses of the implication of the information provided on mixing rate between themajor SBT fishing and their changes over time for the use of combined archival and conventional tagging data to provide fishery independent estimates of fishing mortaility for monitoring the SBT fishery.
4. Provide critical information and contribute to developing a framework for incorporating the archival tag and conventional tagging data within the SBT stock assessment model
5. Integrate the position, temperature and depth data provided by the tags with oceanographic data to develop a seasonal model of residence times and habitat use for regions with consistent temporal patterns across the years
6. Evaluate the implication from a seasonal habit model for the interpretation of future catch and effort data and monitoring strategies.
7. Evaluate implications of the spatial dynamics of juvenile SBT for the management of the SBT resource (e.g. the potential consequences and benefits of either ignoring or using spatially explicit management actions).
Final report
ISBN:
978-1-921826-72-6
Author:
Marinelle Basson
Alistair J. Hobday
J. Paige Eveson
Toby A. Patterson
Final Report
•
2012-06-01
•
10.72 MB
2003-002-DLD.pdf
Results have increased our confidence in the recruitment index based on the aerial survey in the Great Australian Bight (GAB) by confirming that the timing and duration are ideal, that the majority of juvenile SBT are likely to return to the GAB each summer, and that based on current evidence it is unlikely that a large proportion of juvenile SBT remain off South Africa over summer. This is of benefit to all stakeholders and management bodies, including the CCSBT. The extension of a tag based assessment model for SBT to include a spatial component, and the incorporation of archival tag data into the model, is a significant achievement and of major interest to the international community. Methods developed to study migration patterns and habitat preferences of SBT suggest that habitat-based CPUE standardization is unlikely to be as useful for SBT as first anticipated, but these methods may be useful for dealing with unfished areas when standardising CPUE.
By using information in this report, the fishery can now also address requirements within the guidelines under the strategic assessment provisions of the Environmental Protection and Biodiversity Conservation Act 1999 that “the distribution and spatial structure of the stock(s) has been established and factored into the management response.
Spatial structure of fish populations has long been recognised as a potentially critical factor in a population’s overall dynamics, and hence of importance to stock assessments and management. Neither the population model used for southern bluefin tuna (SBT; Thunnus maccoyii) assessment and evaluation of management procedures, nor the management of SBT by a global total allowable catch (TAC) take spatial structure into account. In this ambitious project we used archival tags to provide the necessary data to start integrating the spatial dimension into the population ecology and assessment of SBT.
Keywords: Southern bluefin tuna, Thunnus maccoyii, SBT, archival tagging, spatial, dynamics, habitat use, spatial mark-recapture model, CCSBT, Commission for the Conservation of Southern Bluefin Tuna.
Development and use of acoustic techniques for the assessment of deepwater commercial fish stocks
Project number:
1990-025
Project Status:
Completed
Budget expenditure:
$718,861.50
Principal Investigator:
Tony Koslow
Organisation:
CSIRO Oceans and Atmosphere Cleveland
Project start/end date:
3 Oct 1990
-
25 Oct 1994
Contact:
FRDC
1. Develop techniques to provide quantitative acoustic assessment of the biomass of commercially important fish stocks in the AFZ.
2. To use these methods a) to assess the standing stock of orange roughy off east Tasmania, and b) to assist in a deepwater exploratory fish survey off western Australia
The Kimberley Demersal Fishery: Extent and nature of the resource and the ability of a trap fishery to exploit it
Project number:
1994-026
Project Status:
Completed
Budget expenditure:
$39,560.43
Principal Investigator:
Jim W. Penn
Organisation:
Department of Primary Industries and Regional Development (DPIRD) WA
Project start/end date:
2 Nov 1994
-
2 Jan 1997
Contact:
FRDC
1. To organise and collate all existing information relevant to the Kimberley fishery including logbooks and observer reports from foreign commercial and feasibility fishing, research cruises, and trawl surveys by NT Fisheries and CSIRO into a summary report
Final report
PROJECT NUMBER
•
2014-500
PROJECT STATUS:
COMPLETED
ORGANISATION:
Australian Recreational Fishing Foundation (ARFF)
PROJECT NUMBER
•
1992-014
PROJECT STATUS:
COMPLETED
ORGANISATION:
Department of Primary Industries and Regional Development (NSW)
PROJECT NUMBER
•
2012-301
PROJECT STATUS:
COMPLETED
ORGANISATION:
Charles Sturt University (CSU) Bathurst
Determination of a cost effective methodology for ongoing age monitoring needed for the management of finfish fisheries in Western Australia
Project number:
2004-042
Project Status:
Completed
Budget expenditure:
$224,006.00
Principal Investigator:
Dan Gaughan
Organisation:
Department of Primary Industries and Regional Development (DPIRD) WA
Project start/end date:
14 Aug 2004
-
31 Aug 2007
Contact:
FRDC
The implementation of ESD and the Integrated Fisheries Management Strategy for finfish fisheries of Western Australia will require periodic assessment of the status of the major species within each fishery. In most cases, age structured models are being developed to provide these assessments, but even in cases where full simulation models are not possible, assessing the status of these fish stocks would benefit greatly by having some information on temporal changes to their age structure. Thus, collecting a suitably accurate, time series of age structures for each of the major finfish species is a high priority for the effective management of all commercial and recreational fisheries across WA.
To achieve these objectives, regular monitoring of the age structures of more than 20 stocks/species will be required for inputs into assessment models. It is imperative that the most cost efficient monitoring scheme is developed that will provide estimates of the age distribution for each of these stocks at the level of precision, accuracy and frequency required for suitably robust assessments to be completed. For all species, ages are determined from sectioned otoliths, and validated through marginal incriment analysis. the relationship between age and other proxies for age(including fork length, otolith weight, and other otolith dimensions)will be used when appropriate, to develop alternative predictors of age. Statistical methods will then be used to generate population age structures for market/field samples. The reliability and cost of these proxy-based age estimators, relative to the precision dictated by the stock assessment will then be tested. Irrespective of what age estimator is used, optimising the number of individuals that needs to be aged (100, 200, 500 etc) and determining how frequently these need to be sampled (monthly, yearly, bi yearly, tri-yearly) and what spatial distribution of samples need to provide data of a sufficient quality for use in modelling their abundance must be assessed in a rigorous and explicit manner.
To determine the appropriate monitoring scheme for each of the 20 major finfish species/stocks in WA will require the completion of a series of rigorous cost benefit analyses. These analyses will ultilise the relative level of accuracy of the different age estimators, the cost of obtaining the samples, the costs of processing the samples in relation to the acceptable levels of precision and accuracy needed for the stock assessment purposes for which these data are being collected.
1. Determine for stocks of the 20 major WA finfish species (4 - 5 in each bioregion) the relative accuracy of structures used to estimate age (eg. Sectioned/whole otoliths, lengths, otolith weight, other otolith dimensions or some combination of these).
2. For each stock, examine the relative impact on the calculated age-compositions and their effect on model outputs and conclusions from varying (i) the method of ageing used (only where this is possible from available data) (ii) the number of individuals used in the samples (iii) the spatial distribution of the samples used (iv) if possible, the frequency of sampling.
3. Using agreed levels of precision for the model outputs, undertake cost benefit analyses to generate the most appropriate long-term age structured monitoring program for each major finfish species in WA by assessing the method(s) of ageing, sampling intensity within each year and the frequency of sampling among years.
Final report
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