258 results

Laboratory and field studies of the larval distribution and duration of the introduced seastar Asterias amurensis with updated and improved prediction of the species spread based on a larval dispersal model

Project number: 1993-235
Project Status:
Completed
Budget expenditure: $35,396.00
Principal Investigator: Barry Bruce
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 5 Dec 1993 - 5 May 1995
Contact:
FRDC
TAGS
Modelling
Invasive Species
Ecosystem
Distribution

Objectives

1. Laboratory and field studies of the larval distribution and duration of the introduced seastar Asterias amurensis with updated and improved prediction of the species spread based on a larval dispersal model

Final report

Final Report • 2017-09-29 • 1.63 MB
1993-235-DLD.pdf

Effects of Trawling Subprogram: effects of trawl design on bycatch and benthos in prawn and finfish fisheries

Project number: 1993-179
Project Status:
Completed
Budget expenditure: $800,081.00
Principal Investigator: Stephen J. Blaber
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 20 Dec 1993 - 24 Nov 1997
Contact:
FRDC
TAGS
Fishing Gear
Finfish Fisheries
Bycatch
Aquaculture

Objectives

1. To develop mechanisms to enhance survival and reduce trawl by-catch and measure and reduce the impact of trawls on benthos.

Final report

Final Report • 6.85 MB
1993-179-DLD.pdf

Development of biological tagging techniques for penaeid prawns

Project number: 1993-093
Project Status:
Completed
Budget expenditure: $303,749.00
Principal Investigator: Nigel Preston
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 29 Sep 1993 - 17 Sep 1998
Contact:
FRDC
TAGS
Traceability
Tagging
Stock Assessment
Biotechnology
Biology

Objectives

1. To determine the potential of gene transfer as a method of tagging prawns.
2. To determine whether transposable elements exist in the prawn genome
3. To establish a method of genetic transformation in penaeid prawns
4. To determine whether trace elements accumulated by juvenile prawns remain distinguishable in offshore adult populations
5. To determine the uptake and residence time of selected trace elements in prawn tissues
6. To determine which body tissues of prawns best conserve the selected trace elements

Final report

Author: Nigel Preston
Final Report • 1998-09-08 • 789.84 KB
1993-093-DLD.pdf

Summary

The objective of this project was to develop novel biological tags for penaeid prawns.  The impetus for this research was the growing interest in Australia in the potential for stock-enhancement of penaeid fisheries with hatchery reared juveniles.  In any stock- enhancement program some means of differentiating between introduced and wild prawns is needed to monitor the effectiveness of the program.  Many different types of tags have been used in fisheries, but none are suitable for penaeid reseeding.  For prawns, the tags would ideally be: able to mark individuals at all life history stages; unique to the local population; inexpensive and quick to apply and detect; either transmissible or non-transmissible to subsequent generations; and harmless to both the prawn and consumer (Rothlisberg and Preston 1992).  This project examined whether novel chemical and genetic tags could meet these criteria and hence provide a means of monitoring the success of prawn stock-enhancement programs.

The results of the study showed that novel chemical and genetic techniques could be effectively used to tag prawns.  Neither type of type of tag meet all the desired criteria but each would be well suited for different purposes in stock-enhancement trials.  Chemical element tags would provide a cost-effective means of monitoring the fate of small prawns during the first few weeks after their release in pilot-scale stock-enhancement trials.  If the pilot trials were successful, genetic tags could then be used in subsequent full-scale releases of permanently identified prawns. Genetic tags would also be required to monitor and maintain the genetic diversity of the enhanced populations.

Quantitative interpretation of fine-scale SBT catch per unit effort for south east Australia

Project number: 1993-077
Project Status:
Completed
Budget expenditure: $290,692.00
Principal Investigator: Vincent Lyne
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 22 Sep 1993 - 11 Jun 1999
Contact:
FRDC
TAGS
Oceanography
Fishing Gear
Fishing Effort
Environmental Impact
Data

Objectives

1. To provide quantative interpretation incorporating environmental effect of SBT CPUE for the East Tasmanian fishery
2. To develop scientific support on targeting strategies for the Australian longline fleet

Final report

Author: Vincent Lyne
Final Report • 2011-11-24 • 2.54 MB
1993-077-DLD.pdf

Summary

An analysis of spatial and temporal variations in catch rates of Southern Bluefin Tuna (SBT) in relation to environmental factors was conducted for the region south of Tasmania up to 1he southern half of New South Wales. Substantial temporal and spatial variations were evident in catch-per-unit-effort (CPUE) as well as the size of SBT and attempts were made to relate these to environmental influences. Of these variations, spatial temperature variations in the study zone, in association with bathymetry, appear to influence the general spatial distribution of CPUE and size of SBT. Catch rates and size of SBT off eastern and southern Tasmania are significantly correlated with the Southern Oscillation Index (SOI), opening the possibility of predicting catch rates through forecasts of the SOI index. A wider study examining the downstream effects of the western surface fishery off WA and SA is recommended to examine the impacts of regional variations in fishing activities. There is a noticeable increase in the mean value of catch rates with full moon, particularly the waxing phase. Overall, the changes in mean catch rates with moon phase are small and reflect. A bias by outliers of large catch rates which are inferred as being due to enhanced aggregations during full moon. Observations of large SBT in the northern section of the fishing zone appear to be related to the unique energetic oceanic conditions off southern NSW. Temporal variation in CPUE from 1990-1995 do not appear to be significantly correlated with the chosen environmental factors although the variance of CPUE is correlated to the extent of warn/cold water masses. The consistency of CPUE, latter than CPUE itself, appears to be more strongly influenced by local environmental factors.  

Stock structure and species identification of school and gummy sharks in Australasian waters

Project number: 1993-064
Project Status:
Completed
Budget expenditure: $156,446.00
Principal Investigator: Bob Ward
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 14 Sep 1993 - 3 May 1997
Contact:
FRDC
TAGS
Stock Assessment
Distribution
Biomass

Objectives

1. To determine how many species of gummy shark exist in Australasian waters and to determine their distribution
2. To determine whether there is more than one species of school shark world wide
3. To determine the genetic stock structures of school and gummy sharks in Australasian waters

Final report

Author: R. D. Ward and M. G. Gardner
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf
Final Report • 24.18 MB
1993-064-DLD.pdf

Investigation of school and gummy shark nursery areas in south-eastern Australia

Project number: 1993-061
Project Status:
Completed
Budget expenditure: $288,203.00
Principal Investigator: John Stevens
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 29 Sep 1993 - 16 Sep 1997
Contact:
FRDC
TAGS
Tagging
Stock Assessment
Nutrition
Habitat
Food Web

Objectives

1. To identify pupping and nursery grounds for school and gummy sharks in southern Australia
2. Determine the distribution size structure duration time and movements of newborn and juvenile sharks in nursery areas
3. Attempt to develop recruitment indices for school and gummy sharks
4. Determine pre-recruit mortality from tagging experiments
5. Determine relative catch rates of juveniles by commercial and recreational fishers

Final report

Author: John Stevens
Final Report • 1997-08-06 • 299.91 KB
1993-061-DLD.pdf

Development of an acoustic system for remote sensing of benthic fisheries habitat for mapping, monitoring and impact assessment

Project number: 1993-058
Project Status:
Completed
Budget expenditure: $409,433.00
Principal Investigator: Roland C. Pitcher
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 20 Dec 1993 - 31 Oct 2000
Contact:
FRDC
TAGS
Stock Assessment
Remote Sensing
Habitat
Fishing Technology
Electronic Monitoring

Objectives

1. To develop a digital hydro-acoustic instrument that remotely-sensed seabed type and epifauna communities for mapping, monitoring and impact assessment.

Final report

ISBN: 0-643-06196-7
Author: Roland Pitcher
Final Report • 1999-01-01 • 3.07 MB
1993-058-DLD.pdf

Factors affecting reproductive performance of captive and wild broodstock prawns

Project number: 1992-051
Project Status:
Completed
Budget expenditure: $717,563.00
Principal Investigator: Peter Rothlisberg
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 26 Sep 1992 - 18 Mar 1997
Contact:
FRDC
TAGS
Stakeholder
Reproduction
Productivity
Physiology
Nutrition

Objectives

1. To identify the causes of the seasonal variability in reproductive performance in wild caught and captive broodstock
2. To develop methods for assessing the nutritional condition of broodstock and monitor seasonal variation in prawns' diet and nutritional condition
3. To assess whether conditioning broodstock prawns in ponds prior to inducing spawning may be used to provide good quality spawners regardless of season or source of supply
4. Develop and evaluate formulations for a cost effective artificial diet for pre-spawning conditioning of broodstock prawns

Final report

ISBN: 0-643-05961-X
Final Report • 1997-02-10 • 19.94 MB
1992-051-DLD.pdf

The direct estimation of age and growth of SBT

Project number: 1992-042
Project Status:
Completed
Budget expenditure: $262,260.00
Principal Investigator: John Gunn
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 18 Nov 1992 - 8 Apr 1997
Contact:
FRDC
TAGS
Tagging
Stock Assessment
Reproduction
Otolith
Mortality

Objectives

1. Develop techniques appropriate for the direct ageing of juvenile and adult SBT
2. Validate estimates of age for as many year classes as possible using calcified tissues
3. Objectives as stated in B3 of the project description

Final report

Author: John Gunn
Final Report • 1997-01-10 • 7.31 MB
1992-042-DLD.pdf

Summary

This project was developed in response to calls from the SBT Trilateral (now the CCSBT)  Scientific Committee for the development and validation of techniques for the direct estimation of age and growth in the species. Since the early 1980’s, the stock assessment methods used by Australian, Japanese and New Zealand scientists to examine the status of SBT stocks have depended heavily on accurate data on the age structure of the catch, and population. However, there was significant concern that the methods being used to estimate the age composition of the catch - which were based principally on the conversion of lengths or weights to age using growth curves derived from tagging data - were not accurate, particularly for large fish. As the conversions produced indirect estimates of age they could not be validated. The resulting  uncertainty surrounding their accuracy introduced significant uncertainty into the assessments. Given the serious concerns over the status of the SBT stock, which is considered to be at historically low levels, a new approach that allowed direct and validated estimates of age was urgently required.

In 1992, with funding from the FRDC, CSIRO and the Japanese Marine Research Agency, JAMARC, we began a large and integrated project designed at developing and validating new techniques for directly estimating the age and growth of SBT. A large mark and recapture experiment was initiated within a JAMARC-CSIRO tagging program and over the four years 20,204 were injected with strontium chloride (SrCl2); otoliths, scales and vertebrae collected by CSIRO, Australian Fishing Zone and RTMP Observers, and scientists from the Japanese National Research Institute for Far Seas Fisheries were prepared using adaptations of techniques reported in the literature; a relational data base was developed allowing all of the age and growth data produced by the project to be integrated into the central CSIRO SBT data base, the key repository for data used in the annual CCSBT assessments; a collaborative project was developed with Dr John Kalish and his team at the Australian National University using a new technique based on bomb radiocarbon chronometry to provide independent validation of our age estimates for large fish; and samples from our study were sent overseas for review by international experts. 

The project met all of its objectives and has undoubtedly been a major success.  Our findings revealed serious errors in the historical data used within the Tri-lateral/ CCSBT assessments (see Table 1) and the new data produced by the project  have had an immediate and significant impact on both the assessment process and our understanding of the SBT population. The new techniques and data have been accepted by the CCSBT Scientific Committee, prompting an agreement at the 1996 CCSBT meeting to introduce a fishery-wide program of sampling and routine age estimation over the next few years.  

In addition to the achievements made within the project, the new techniques we have developed and validated have the potential over the next few years to resolve many of the outstanding uncertainties surrounding the population biology and demographics of the SBT populations.

Keywords: Age, Southern Bluefin Tuna

Genetic analysis of the spatial structure of SBT population

Project number: 1992-031
Project Status:
Completed
Budget expenditure: $148,967.00
Principal Investigator: Peter Grewe
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 26 Sep 1992 - 5 Dec 1995
Contact:
FRDC
TAGS
Wild Catch
Stock Assessment
Modelling
Market Opportunities
Fishing Effort

Objectives

1. To assess the genetic variability in juvenile SBT collected from the SW coast of Australian adults collected off S Africa and adults collected from the east coast of Tasmania
2. The genetic variation present among the sample locations will be used to test the hypothesis that the two length modes present in a single year class of juvenile SBT relate to at least two genetically different components of the population.
3. Genetic variation between the African and Tasmanian adult samples will help determine whether genetic differences observed in juvenile fish is related to their spatial distribution as adults

Final report

Final Report • 2017-09-29 • 1.96 MB
1992-031-DLD.pdf
View Filter

Research

Category

Product Type

Species

Organisation