139 results

Tactical Research Fund: Using innovative techniques to analyse trends in abundance for non-target species

Project number: 2010-057
Project Status:
Completed
Budget expenditure: $68,235.00
Principal Investigator: Malcolm Haddon
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 30 Nov 2010 - 30 Jul 2011
Contact:
FRDC

Need

EBFM requires performance indicators for a wide range of species that interact with fisheries, and systems to monitor those performance indicators. However, there is no routine monitoring of the status of the many commercially important byproduct and bycatch species. The assessment of these non-target species remains important in terms of the Commonwealth Harvest Strategy Policy and AFMA have expressed a need for a solution to how to assess the relative status of these species. Such monitoring is required for strategic assessment under the EPBC Act (1997).

Most of non-target species are not under quota and while not directly targeted they can still experience significant fishing mortality and add value to the landed catch. Currently, if they are assessed at all, the assessments merely apply the same strategies as adopted for target species. There is often a perception that CPUE should be disregarded “because the species was not targeted”. There is a need to determine whether alternative methods should be applied to such species that take into account the fact that their catch is incidental to the main activities of the fishers and hence the fishery dependent data for the non-target species will have different qualities. By definition these fisheries are multi-species in nature and this too can complicate their assessment. Technically this is not a trivial problem and more clarity is needed concerning the scope of the issue and how to deal with it. Rather than launch immediately into a relatively long term attempt at finding a solution, a more efficient approach is proposed that involves expert examination and rapid review to map the road ahead. Hence there is a need to conduct workshops aimed at clarifying the management requirements and the most cost effective approach to solving these management issues, which apply to all multi-species data poor fisheries.

Objectives

1. Test analysis methods against available datasets capable of providing trend in abundance estimates for byproduct and bycatch species
2. Conduct two workshops, aimed at identifying the management issues and the techniques available for analyzing trends in abundance in non-target species.

Final report

ISBN: 978-0-643-10812-7
Author: Malcolm Haddon
Environment
PROJECT NUMBER • 2014-024
PROJECT STATUS:
COMPLETED

Estimating the abundance of School Shark in Australia using close kin genetic methods

Close kin mark recapture (CKMR) provides an estimate of absolute abundance that is independent of fishing behaviour. We present a first CKMR estimate of abundance for School Shark and discuss the management implications of our findings. We found 65 half sibling pairs (HSPs), 3...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Industry
Environment
PROJECT NUMBER • 2003-075
PROJECT STATUS:
COMPLETED

Designing, implementing and assessing an integrated monitoring program for the NPF: developing an application to stock assessment

For more than a decade the Northern Prawn Fishery assessments have indicated that the tiger prawn resource is overexploited. Deriso’s1 (2001) review of the tiger prawn assessment supported this conclusion and also drew attention to the high level of uncertainty in the assessment. Deriso...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Environment
PROJECT NUMBER • 2016-039
PROJECT STATUS:
COMPLETED

Putting potential environmental risk of Australia's trawl fisheries in landscape perspective: exposure of seabed assemblages to trawling, and inclusion in closures and reserves

This project implemented the first national spatial approach to quantifying the exposure of mapped seabed assemblages to the footprints of all demersal trawl fisheries that operate on the mainland continental shelf and slope of Australia, as well as their spatial protection in areas permanently...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Environment
PROJECT NUMBER • 2012-046
PROJECT STATUS:
COMPLETED

Informing the review of the Commonwealth Policy on Fisheries Bycatch through assessing trends in bycatch of key Commonwealth fisheries

The purpose of this report is to inform the review of the Commonwealth Policy on Fisheries Bycatch. In March 2012, the Minister for Agriculture, Fisheries and Forestry, announced the review of the Commonwealth Policy on Fisheries Bycatch, with the aim of improving the management of bycatch in...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Environment
PROJECT NUMBER • 1992-042
PROJECT STATUS:
COMPLETED

The direct estimation of age and growth of SBT

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...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
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