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Industry
Industry
PROJECT NUMBER • 2009-714.10
PROJECT STATUS:
COMPLETED

Seafood CRC: decision-support tools for economic optimisation of western rocklobster

The Western Rocklobster fishery was one of the first to be made limited entry with the number of licences restricted since 1963. Historically, the main focus of the assessment and management of the fishery has been on the status of the breeding stock to ensure biological sustainability. In the...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
Environment
Environment
PROJECT NUMBER • 2017-119
PROJECT STATUS:
COMPLETED

Developing novel remote camera approaches to assess and monitor the population status of Australian sea lions

This project trialled the use of remote cameras to monitor the relative abundance of Australian sea lions (ASLs, Neophoca cinerea) at three Western Australian (WA) breeding colonies. The research was undertaken by the Department of Primary Industries and Regional Development (DPIRD) to assess...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
Adoption
PROJECT NUMBER • 2005-314
PROJECT STATUS:
COMPLETED

Sharing the Fish conference '06

Sharing the Fish06 Conference was held from 26 February – 2 March 2006 and preceded by the FAO Pre Conference Workshop on 23 – 24 February 2006. Sharing the Fish06 Conference was an initiative of the Department of Fisheries Western Australia. The aim of the conference was to focus...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
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
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
Environment
PROJECT NUMBER • 2004-051
PROJECT STATUS:
COMPLETED

Management and monitoring of fish spawning aggregations within the West Coast Bio-region of Western Australia

Many strategies have evolved among fishes to maximise spawning success. One of the most striking of these is aggregation spawning, in which individuals group together, often at predictable times and locations in order to reproduce (cf. a school, which refers to a group of non-spawning fish)....
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
SPECIES
Industry
PROJECT NUMBER • 2000-215
PROJECT STATUS:
COMPLETED

Improved performance of marron using genetic and pond management strategies

Marron (Cherax tenuimanus) are the highest valued freshwater crayfish farmed in Australia. This project addressed the need to increase the profitability of commercial marron farms by improving growth rates and pond management strategies. The project evaluated progeny produced from wild populations...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
SPECIES

Tactical Research Fund: Evaluating source-sink relationships of the Western Rock Lobster fishery using oceanographic modelling

Project number: 2008-087
Project Status:
Completed
Budget expenditure: $75,000.00
Principal Investigator: Nick Caputi
Organisation: Department of Primary Industries and Regional Development (DPIRD) WA
Project start/end date: 31 Jan 2009 - 30 Dec 2009
:

Need

The puerulus settlement in 2007/08 was the second lowest in 40 years and follows several years of below-average settlements. Previous studies have shown that environment factors such as the Leeuwin Current and storms affect the abundance and spatial distribution of puerulus settlement. However it is important to identify if there are some changes to these environmental factors contributing to the low recruitment. Initial monitoring indicates very low 2008/09 settlement despite the Leeuwin Current being above average this year. This event is unexpected based on previous settlements during years of strong Leeuwin Current and has serious implications for the management of the fishery. The breeding stock overall is believed to be within historic ranges and so is not expected to have contributed to the recent decline in settlement. However it is possible that the breeding stock in certain parts of the fishery may be more critical than others and this could have changed over the years due to climate change effects.
Advances in quality of satellite data in the 1990s measuring sea surface topography (altimeter satellites) have enabled significant improvements in our understanding of the environmental factors, with the assistance of oceanographic modelling. Previous oceanographic models were focussed on the open ocean circulation off the continental shelf. Recent advances enable the development of high-resolution models at 10 km spatial scale which resolve the dominant processes on the shelf. Understanding the causes of recruitment variability and their long-term trends has important implications in the stock assessment and management of the fishery. The management response would be significantly different if the cause of the series of low recruitment was due to egg production or environmental factors. An adjustment to the sustainable harvest rate may be required if there are long-term environmental trends that affect the average recruitment of the western rock lobster.

Objectives

1. To determine the relative contribution of larval production from different areas to the abundance and spatial distribution of puerulus settlement over 15 years using a larval advection model

Final report

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