89 results
Environment
PROJECT NUMBER • 1989-109
PROJECT STATUS:
COMPLETED

Distribution of benefits between commercial and recreational fishers from policies implemented to control fishing effort in commercial fisheries: An application to the Coffin Bay King George whiting fishery

Recreational boat fishers using the Coffin Bay boat ramp between January and June 1990 were interviewed to obtain information on their fishing activities. Recreational boat fishing is an important activity in Coffin Bay. The majority of fishers targeted King George whiting (Sillaqinodes punctata),...
ORGANISATION:
SARDI Food Safety and Innovation
Environment
PROJECT NUMBER • 1983-050
PROJECT STATUS:
COMPLETED

South Australian deep water line fishing developments

During November and December 1983 and February to May 1984, the Commonwealth funded South Australian Deep Water Line Fishing Survey investigated the viability of droplining and trotlining on the continental slope off southeast Australia. At present many south Australian fishermen rely heavily on...
ORGANISATION:
SARDI Food Safety and Innovation
Blank
PROJECT NUMBER • 2017-198
PROJECT STATUS:
COMPLETED

Assess new technologies and techniques that could improve the cost-effectiveness and robustness of recreational fishing surveys

Currently, the most significant gap in our knowledge in assessing the status of community-shared fisheries is determining the relative contribution by the recreational sector. To explore this issue, a two-day national workshop was held from 10-12 July 2018 at the South Australian Research and...
ORGANISATION:
SARDI Food Safety and Innovation
Industry
Industry
Industry

A data management and reporting system and temporal and spatial analysis of historical catch records in the SA abalone fishery

Project number: 1994-167
Project Status:
Completed
Budget expenditure: $136,752.00
Principal Investigator: John Keesing
Organisation: SARDI Food Safety and Innovation
Project start/end date: 28 Jun 1995 - 29 Jun 2003
Contact:
FRDC

Objectives

1. To develop a data managment and reporting system as detailed in B4 Objectives of the Project Application forming part of this Agreement
2. Produce a historical analysis of catch and effort data as detailed in B4 Objectives of the Project Application forming part of this Agreement

Final report

Author: John Keesing
Final Report • 2003-05-05 • 3.38 MB
1994-167-DLD.pdf

Summary

Abalone stocks exist as a large number of metapopulations or sub-stocks each with peculiar growth and mortality characteristics. Hence different populations respond differently to exploitation through fishing. The sustainability of this fishery is linked to effective management of these meta-populations. For this reason, abalone catch and effort data should be collected on as fine a spatial scale as possible.

South Australia's catch and effort data is collected on the finest spatial scale of any abalone fishery in Australia. However, to date, analysis of the fine scale components of the data has been superficial simply as a result of the lack of tools to rapidly summarize and present data visually. Spatial and temporal analyses of these data will assist in the assessment of how individual sub-stocks have responded to fishing.

Across South Australia there are 35 abalone fishers fishing 7 different Total Allowable Catches (TAC's) on two species across 196 reporting areas. While the complexity of the data has to date precluded comprehensive analysis it also offers the potential for powerful insights into the dynamics of the fishery after more than 10 years of quota management.

In all fisheries, levels of catch and catch rates are two indicators used to attempt to evaluate and assess the response of stocks to exploitation through fishing. Declines in catches or catch rates are often interpreted as indicators of recruitment or growth overfishing and similarly increases in catches and catch rates may be interpreted as providing evidence that stocks are being sustained in the face of fishing or may even be under-exploited. 

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