101 results

Relating fishing mortality to fish trawl effort on the NW shelf

Project number: 1994-025
Project Status:
Completed
Budget expenditure: $394,760.00
Principal Investigator: Jim W. Penn
Organisation: Department of Primary Industries and Regional Development (DPIRD) WA
Project start/end date: 17 Oct 1994 - 30 Sep 1996
:

Objectives

1. To determine the natural mortality and growth rates of major species in the NW trawl fishery
2. To relate fishing mortality rates to levels of fishing effort
3. To cooperate with CSIRO in analysis of their NW Shelf trawl survey data
4. To calculate appropriate levels of fishing effort for sustainable exploitation of the resource and incorporate this in a management plan for the fishery

Final report

Environment
Environment
PROJECT NUMBER • 2000-139
PROJECT STATUS:
COMPLETED

Quantification of changes in recreational catch and effort on inner Shark Bay snapper species following implementation of responsive management measures

A 12-month creel survey of recreational boat-based fishing in Shark Bay, Western Australia was conducted between May 2001 and April 2002 to estimate the catch of pink snapper. During the survey 431 boat crews were interviewed at public boat ramps of which 414 had been fishing. The information...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
SPECIES

Determination of cost effective techniques to monitor recreational catch and effort in Western Australian demersal finfish fisheries

Project number: 2005-034
Project Status:
Completed
Budget expenditure: $277,720.00
Principal Investigator: Warrick J. Fletcher
Organisation: Department of Primary Industries and Regional Development (DPIRD) WA
Project start/end date: 29 Apr 2005 - 6 Mar 2014
:

Need

The need for regular monitoring of recreational fishing activity in WA will increase substantially over the coming years. This increase will result from the overarching requirement for better data to enable the management of those fish stocks where recreational fishing takes a major component of the catch. In addition, these data will also be needed as inputs to the process of determining explicit sectoral allocations (e.g. between recreational, commercial, indigenous)through the Integrated Fisheries Management (IFM) processes which have recently been initiated (see DOF, 2003 for details). Moreover, some level of monitoring will be needed to determine if the outcomes of management arrangements do result in the catch of each sector (including the recreational sector) meeting these allocation decisions. One of the first fisheries to be put through this IFM process will be the west coast demersal (offshore) finfish fishery.

The traditional methods for estimating recreational catch and effort have been either creel-based or diary based surveys. Both of these methods can have a relatively high cost with each generating estimates that are subject to a number of different biases. Given that allocations decisions for these fisheries will be based on the estimates generated from surveys, all stakeholder groups are demanding that there is some assessment of the accuracy of any estimates produced. Such analyses are best completed by the simultaneous collection of data by alternative methods to allow suitable comparisons to be made of any differences in the estimates.

Furthermore, whilst there is little doubt that one or other of these intensive survey methods will need to be completed at periodic (eg 3 to 5 year) intervals, having information at a lower precision level between these intervals (i.e. annually) to provide an indication of whether recreational catches are remaining steady, increasing or declining within anticipated boundaries of any allocation will be of great benefit (possibly essential) to the effective management of the IFM outcomes.

Given that the IFM management of these offshore (boat-based) demersal fisheries is likely to be focused on only a relatively small number of indicator species, rather than trying to manage every species directly, ongoing indicator surveys may be able to use different sampling strategies to those used in the standard surveys. In addition, alternative methods of data collection are now more available. These include the use of remote monitoring technology (e.g. cameras), using information already collected by other agencies (boat ramp usage rates) and the potential to use data collected by the Department’s compliance staff in a more directed fashion.

Understanding the relative precision and accuracy of each of the various standard and innovative approaches along with their relative costs, benefits, limitations and interactions will be essential for determining what ongoing sampling methods need to be used to monitor the IFM outcomes for this fishery. If successful, these same techniques will be used to assist determine the appropriate sampling scheme for other fisheries requiring the ongoing collection of recreational data.

DoF (2003) Report to the Minister for Agriculture, Forestry and Fisheries by the Integrated Fisheries Management Review Committee - Fisheries Management Paper No. 165

Objectives

1. Complete a series of concurrent catch and effort surveys of the West Coast Demersal Recreational Fishery using a variety of survey techniques.
2. Compare the precision and accuracy of estimates generated using these various techniques
3. Using cost benefit analysis, produce a series of options to monitor annual catch and effort for a range of precision levels and indicator species

Final report

ISBN: 978-1-921845-64-2
Author: Rick Fletcher
People
PROJECT NUMBER • 2001-064
PROJECT STATUS:
COMPLETED

Aboriginal fishing strategy

The Western Australian Aboriginal Fishing Strategy (the “strategy”) was developed following a three-year consultative process overseen by former Western Australian Supreme Court Judge, the Hon E M Franklyn QC. Formulation of the draft strategy was assisted by a working group, which...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
Environment
Environment
Environment
PROJECT NUMBER • 2014-004
PROJECT STATUS:
COMPLETED

Mitigation measures to reduce entanglements of migrating whales with commercial fishing gear

This project provided a robust assessment that gear modifications introduced into the WCRLMF and octopus fisheries have reduced the number of reported entanglements. The management arrangements around the implementation of these modifications are appropriate in light on the new spatial and temporal...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
People
Environment
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