75 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 • 2009-024
PROJECT STATUS:
COMPLETED

Mapping the distribution and movement of gulper sharks, and developing a non-extractive monitoring technique, to mitigate the risk to the species within a multi-sector fishery region off southern and eastern Australia

This two year project provided the science to support the development of a management strategy for three gulper sharks species (genus Centrophorus) being assessed for threatened species listing. Their listing represented one of the most urgent environmental challenges to the South East Scalefish and...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Industry
PROJECT NUMBER • 2015-202
PROJECT STATUS:
COMPLETED

Maximising net economic returns from a multispecies fishery

Achieving fishery MEY may result in a reduction in net economic returns in a broader sense if the loss to consumers exceeds the gain to the industry. Such a loss may occur if supplies to the local market are reduced and prices paid by consumers increase. This results in a transfer of benefits from...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Environment
PROJECT NUMBER • 2016-015
PROJECT STATUS:
COMPLETED

Proposed northern Australia water developments pertinent to the Northern Prawn Fishery: collation and review

The project reviewed the legislation dealing with Water Resource Management in each of Queensland, the Northern Territory, and Western Australia that effects the management of overland flow in catchments that empty into water managed as part of the Northern Prawn Fishery. The project...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart

Setting economic target reference points for multiple species in mixed fisheries

Project number: 2011-200
Project Status:
Completed
Budget expenditure: $319,500.00
Principal Investigator: Sean Pascoe
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 16 Oct 2011 - 19 Jan 2014
Contact:
FRDC

Need

The Commonwealth HSP requires that stocks be maintained, on average, at a biomass level that produces maximum economic yield (BMEY). In multispecies fisheries, this has been interpreted to be the combination of species biomasses that maximise economic profits for the fishery overall, which may differ substantially from what may be derived in a single species assessment. The HSP requires a set of target reference points for each species consistent with the principle of maximising economic returns from the fishery as a whole to be established. The existence of non-target by-product species affects the optimal yield of the target species (and vice versa), and subsequently their appropriate reference points. There is currently no standard framework to determine target reference points for individual stocks within a multispecies fishery to generate MEY for the fishery as a whole. Simple single species indicators such as the 1.2 BMSY proxy for BMEY may not always be accurate. Similarly, use of reference CPUE rates in cases where data on species are poor is also inappropriate, and is proving problematic. For example, in the SESSF, problems have recently arisen regarding the proposed quotas for Ocean Perch (a by-product species) being incompatible with those for their associated target species (Pink Ling).

The aim of this project is to develop and demonstrate a framework that will assist managers in developing target reference points consistent with the HSP in multispecies fisheries. The project will address both target species and non-target species simultaneously, and will consider indicators for both data rich and data poor species.

Objectives

1. Develop a framework to cost effectively determine target reference points for target and non-target stocks in multispecies fisheries, pursuant with the Commonwealth Harvest Strategy Policy (HSP) objectives of maximum economic yield
2. Demonstrate the applicability of the framework developed using a case study fishery
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