258 results

Implications of current spatial management measures on AFMA ERAs for habitats

Project number: 2014-204
Project Status:
Completed
Budget expenditure: $191,289.19
Principal Investigator: Roland C. Pitcher
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 17 Jul 2014 - 29 Dec 2015
Contact:
FRDC

Need

In response to the EPBC Act, related regulations and international obligations, AFMA has moved beyond target species to an ecosystem-based approach to managing Commonwealth fisheries — aiming for broader environmental sustainability including for bycatch species, habitat and communities. Typically, a risk based approach is being taken for this purpose. Research has demonstrated that demersal fishing gears can impact seabed habitats and communities, which consequently are considered potentially at risk. Accordingly, ecological risk assessments (ERAs) for habitats have been conducted for the major Commonwealth fisheries. However, these ERAs were interim in nature, and non-spatial, largely due to inadequate data for most fisheries. More recently, new data and methods have become available that would permit an advancement of these assessments; and further, new management has been implemented — including effort management, fishery closures and the Commonwealth Marine Reserve System (CMRS) — that may change the level of potential risk. Thus, AFMA has identified a need to extend the ERAs covering habitats and communities, taking into account the new information, methods and management. In particular, AFMA has specified a priority requirement for a gap analysis to determine the extent to which individual fishery ERAs, and hence ERM, need to address habitats following the finalisation of the CMRS network and considering other fishery management measures in place, including effort reduction & closures. It is this latter priority need that this proposal addresses. Note that while there is some uncertainty around the timing and scope of the government review of CMRS, the need addressed by this proposal remains a priority for AFMA due to the significant fishery management measures that have been implemented in recent years.

Objectives

1. Capitalize on recently collated data and mapped distributions of predicted demersal assemblages and associated habitats — as well as data for Commonwealth demersal fishing effort, fishery closures and marine reserves — to provide:
2. - quantification of the overlap of fishing effort and intensity with each mapped assemblage/habitat,
3. - quantification of the overlap of each mapped assemblage/habitat with areas of spatial management that exclude fishing, such as closures and reserves,
4. - a gap analysis and prioritization of which mapped assemblages/habitats, and in which fisheries, may require future focus for AFMAs fishery ERAs.
5. - qualitative assessment of the potential risk implications for any habitat forming biota (if/where data available) in assemblages with high exposure to fisheries, given current spatial management.

Final report

ISBN: 978-1-4863-0685-5
Authors: Roland Pitcher Nick Ellis Franziska Althaus Alan Williams Ian McLeod Rodrigo Bustamante Robert Kenyon Michael Fuller
Final Report • 2016-06-01 • 2.38 MB
2014-204-DLD.pdf

Summary

In this project, CSIRO researchers implemented the first Australia-wide spatial approach to quantifying the exposure of mapped seabed assemblages to the footprints of Commonwealth demersal trawl fisheries, as well as their spatial protection in areas closed to trawling. These outputs are assisting AFMA in understanding the contributions of existing spatial management measures to environmental sustainability, and to identify and prioritise any remaining needs for addressing risks to habitats. The focus provided by these priorities is intended to reduce the costs of environmental assessments, ultimately having outcomes including reduction of the ecological risks posed by trawling and enhanced environmental sustainability. Trawling footprints were mapped from fishery effort data for recent years. Protection provided by current spatial management included fishery closures, the Commonwealth Marine Reserve system (CMRs), and some other Marine Protected Areas (MPAs). Seabed assemblages — as surrogates for broad habitats — were defined and mapped using a single consistent method that had not been possible previously, but was now enabled by new advances in analyses and the availability of new data & knowledge. The overlaps of each assemblage with trawl footprints, and with areas closed to trawling, were calculated to quantify trawl exposure and spatial protection. 

Review and assess stock assessment methods used in Australia

Project number: 2014-039
Project Status:
Completed
Budget expenditure: $152,339.00
Principal Investigator: Richard Little
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 4 Jan 2015 - 29 Jun 2016
Contact:
FRDC

Need

Stock assessment is a set of tools and methods generally used to assess the status of wild capture fisheries stocks. They range from complex statistical and mathematical models, to simple, almost back of the envelope, methods. They are used to predict population size, quantify the impact of fisheries on the population and in some jurisdictions, provide key outputs needed in harvest strategies. There is a diverse range of methods in a field where practitioners have tended to produce home-grown tools in their favourite code languages (R, Fortran, C++, Visual Basic, ADMB etc.). The use of a specific model or method is often historical rather based on an objective evaluation of options e.g. the risk-cost-catch framework (see Method references). In recent years changes have occurred allowing some shift away from previous approaches:
• More off-the-shelf methods, with a diverse range of flexible features, have become available and some uptake has occurred e.g. Stock Synthesis (SS) (http://nft.nefsc.noaa.gov/SS3.html)
• There has been some convergence of language tools using the open source model (e.g. ADMB, Gnu and R)
• Stock assessment tool kits have become freely available e.g. the NOAA fisheries toolbox (http://nft.nefsc.noaa.gov/index.html)

However, in many cases it is still standard practice in Australia to develop home-grown models. Although this is not in itself an issue, it does not always allow for synergies and more cost effective practices. For example, it has become standard practice in the USA to have a model developed and maintained by a team, have it independently tested and then made available as an off-the-shelf GUI driven tool. Many stock assessment scientists now use these tools. In Europe, ICES also tends to use standard approaches.

There is a real need for a more strategic view of which framework Australia should adopt in the present climate of:
• Fewer finance and capability resources
• Data rich to data poor fisheries
• Small and large fisheries.

This review does not preclude the use of specific modelling.

Objectives

1. Review existing stock assessment methods used in Australia.
2. Review Australian stock assessment needs, and model developer and user capacity.
3. Review methods used and reviews undertaken elsewhere in the world.
4. Assess the relative merits of off-the-shelf versus case-specific assessments.
5. With input from the different jurisdictions, provide recommendations for a possible set of investment models.

Final report

ISBN: 978-1-4863-0997-9
Authors: Cathy Dichmont Roy Deng Andre Punt Rich Little
Final Report • 2018-06-25 • 1.31 MB
2014-039-DLD.pdf

Summary

Stock assessments provide scientific advice in support of fisheries decision making. They involve fitting population dynamics models to fishery and monitoring data to provide estimates of time-trajectories of biomass and fishing mortality in absolute terms and relative to biological reference points such as BMSY (the biomass corresponding to Maximum Sustainability Yield, MSY) and FMSY (the fishing mortality rate corresponding to MSY), along with measures of uncertainty. Some stock assessments are conducted using software developed for a specific stock or group of stocks. However, increasingly, stock assessments are being conducted using packages developed for application to several taxa and across multiple regions. We reviewed the range of packages used to conduct assessments of fish and invertebrate stocks in the United States because these assessments tend to have common goals, and need to provide similar outputs for decision making. Sixteen packages were considered, five based on surplus production models (“A Stock Production Model Incorporating Covariates”; “Bayesian Surplus Production Model-1”; “Bayesian Surplus Production Model-2”; “Depletion-Based Stock Reduction Analysis”; “Extended Depletion-Based Stock Reduction Analysis”), one based on a delay-difference model (“Collie-Sissenwine Analysis”), and the remainder based on age-structured models (“Assessment Method for Alaska”, “Age Structured Assessment Program”, “Beaufort Assessment Model”, “MULRIFAN-CL”, “Statistical catch-at-length”, “Stock Synthesis”, ”Simple Stock Synthesis”, “Extended Stock Synthesis”, “Virtual Population Analysis”, “VPA-2BOX”, “).

This report highlights the benefits and disadvantages of stock assessment packages in terms of allowing analysts to explore many assessment configurations and facilitating the peer-review of assessments. It also highlights the disadvantages associated with the use of packages for conducting assessments. Packages with the most options and greatest flexibility are the most difficult to use, and see the greatest development of auxiliary tools to facilitate their use.

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
Environment
PROJECT NUMBER • 2014-021
PROJECT STATUS:
COMPLETED

Developing innovative approaches to improve CPUE standardisation for Australia's multi-species pelagic longline fisheries

This project was undertaken by a collaboration of senior fishery scientists at CSIRO and from New Zealand, together with a former fisheries manager now with the Commonwealth Department of Agriculture and Water Resources in Canberra, on the development of methods to construct indices of stock...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart
Environment
PROJECT NUMBER • 2014-002
PROJECT STATUS:
COMPLETED

Aquatic Animal Health Subprogram: Development of stable positive control material and development of internal controls for molecular tests for detection of important endemic and exotic pathogens

This project has resulted in the production of a bank of quality-assured, non-infectious, quantifiable, molecular test controls that can be provided to any diagnostic laboratory in a ready-to-use form to assist them with the implementation of specific aquatic animal disease diagnostic tests. In...
ORGANISATION:
CSIRO Oceans and Atmosphere Hobart

International Institute of Fisheries Economics and Trade Conference (IIFET) 2014

Project number: 2013-412
Project Status:
Completed
Budget expenditure: $30,000.00
Principal Investigator: Sean Pascoe
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 31 Aug 2013 - 30 Sep 2014
Contact:
FRDC

Need

Australia is at the forefront of economics based fisheries management, with explicit targets of maximum economic yield in Commonwealth fisheries and strong economic efficiency objectives in most States. The need to improve economic research capability in Australia to meet the needs of these management objectives has been recognized by FRDC through the economic capacity building project (FRDC 2008/306) and funding from the Seafood CRC to run a series of "Master classes" for managers and industry to explain the basic economic concepts that apply to fisheries management. While these programs have been successful, there is substantial benefit in attracting the world's best fisheries economists to present new ideas and methods that can ultimately benefit Australian fisheries and aquaculture industries. The aim of the conference is to attract such economists as well as practitioners (managers and industry) with strong economic focus. This also provides an opportunity to showcase the work being undertaken in Australia to an international audience, gaining strong feedback that will ultimately lead to improved economic analyses and hence management of Australian fisheries.

Objectives

1. To hold the 2014 biennial conference of the International Institute of Fisheries Economics and Trade

Final report

ISBN: 978-1-4863-0532-2
Author: Sean Pascoe

Project products

Proceedings • 2014-07-07 • 3.06 MB
2013-412-Proceedings.pdf

Summary

Proceedings from the International Institute of Fisheries Economics and Trade Conference 2014 - 7-11 July 2014 (including abstracts)
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