78 results
Environment
PROJECT NUMBER • 2013-028
PROJECT STATUS:
COMPLETED

Review and update harvest strategy settings for the Commonwealth small pelagic fishery

This study undertook ecosystem and population modelling to evaluate and provide advice on the reference points (e.g. biomass depletion levels) and settings (e.g. exploitation rates) for the four main target species in the harvest strategy of the Commonwealth Small Pelagic Fishery (SPF) – Jack...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Industry
Industry
Environment
PROJECT NUMBER • 2012-200
PROJECT STATUS:
COMPLETED

Evaluating rotational harvest strategies for sea cucumber fisheries

This project evaluated the benefits of a rotational harvest strategy (the Rotational Zoning Scheme - RZS) in the Queensland East Coast Sea Cucumber (Bêche-de-mer) Fishery and found that, in general, the current management arrangements result in a low risk to most fishery species and reduce the...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Industry
PROJECT NUMBER • 2013-200
PROJECT STATUS:
COMPLETED

Testing abalone empirical harvest strategies, for setting TACs and associated LMLs, that include the use of novel spatially explicit performance measures

The management of abalone stocks is difficult for many reasons including their high value and the exceptional levels of spatial structuring found in their stocks. In Tasmania, for example, suggestions to change such things as a legal minimum length or introduce a formal harvest strategy to replace...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart

Options for Tier 5 approaches in the SESSF and identification of when data support for harvest strategies are inappropriate

Project number: 2013-202
Project Status:
Completed
Budget expenditure: $114,154.00
Principal Investigator: Malcolm Haddon
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 30 Jun 2013 - 29 Jul 2014
Contact:
FRDC

Need

The current Harvest Strategy Framework has no formal process for deciding whether the Tier harvest strategy applied to a stock is appropriate or not, there is thus no formal process for deciding when to use a lower Tier. Even worse, when a Tier4 assessment is deemed inappropriate in the SESSF there is no lower Tier available for use. There is thus a need to establish guidelines for identifying when a Tier method is inappropriate for a stock, and also a need to develop an array of alternative harvest strategies for use as a Tier5 when Tier4 is deemed inappropriate. As there is such a wide range of potential Tier 5 procedures, many with the same data requirements, testing is required to allow an informed decision about which are best to implement - particularly in the SESSF context.

Section 6 of the DAFF public discussion paper for the review of the Commonwealth fisheries Harvest Strategy Policy (see FRDC project 2012/225) investigates questions of uncertainty about assessment approaches, the level of data required to maintain species within a given Tier and when to switch between Tiers. The proposed project directly addresses known issues in the SESSF that relate to this question, and timing of the review allows this project to tailor analyses to specifically address review recommendations and advice.

A parallel and complementary project (FRDC 2012/202) provides a study of the trade-off among ecological and economic risks associated with harvesting, the benefits of harvesting and the costs associated with management. This is concerned with strategic considerations over all Tiers, whereas the current project looks more specifically at data requirements within SESSF Tiers, and alternative Tier procedures for data poor species in the SESSF.

Objectives

1. Establish guidelines, using SESSF case studies, for when the particular Tier harvest strategy for a given stock becomes inappropriate and make explicit recommendations as to what response would then be appropriate.
2. Determine options for alternative harvest strategies when none of the present Tiers is appropriate (i.e. potential Tier 5 approaches)
3. Produce presentations and explanatory documents for distribution across RAGs and MACs, describing the criteria and new Tier 5 harvest strategies.

Final report

ISBN: 978-1-4863-0493-6 (print.)
Author: Malcolm Haddon
Environment
PROJECT NUMBER • 2015-013
PROJECT STATUS:
COMPLETED

Developing triple bottom line harvest strategies that include all environmental aspects for multi-sector fisheries

Based on the results of a comprehensive literature review and the collective expertise of the project team, we developed two alternative approaches with which to evaluate trade-offs between triple bottom line objectives and stakeholder preferences: a semi-quantitative multi-criteria decision...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
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