Physical Sciences and Mathematics Commons^™

2021 Assessment Of The Status Of The West Coast Demersal Scalefish Resource, David V. Fairclough, Sybrand Alex Hesp, Ainslie Denham, Emily A. Fisher, Rachel Marks, Karina L. Ryan, Elaine Lek, Rhys Allen, Brett M. Crisafulli

Fisheries research reports

A recovery program for the West Coast Demersal Scalefish Resource was introduced between late 2007 and early 2010, based on the maintenance of retained catches of demersal species (overall suite and each indicator species) by both the commercial and recreational sectors below 50% of the catches reported in 2005/06 (original catch recovery benchmarks).

Catch reductions were aimed at reducing exploitation levels (F, long-term fishing mortality of the key indicator species’ stocks) to below the threshold reference point (F = M, the natural mortality rate), which would then allow stocks to recover to above the …

Fisheries Research Report No. 190 - Esd Reporting And Assessment Subprogram: Strategic Planning, Project Management And Adoption - Stage 2, R Fletcher

Fisheries research reports

Final FRDC Report – Project Number 2004/006

The second stage of the operation of the ESD Subprogram was successful, but compared to the focus during the first subprogram period, mostly in a consolidation manner rather than from the generation of significant new tools. This was necessary because it takes time to adopt and integrate significant changes to the methods of operation of agencies and industries. The policies must be there before any real activity can occur and we found that for the broader focused, cross fishery/cross sector applications of the framework, agencies were not in a position for much of …

Fisheries Research Report No. 187 - Management And Monitoring Of Fish Spawning Aggregations Within The West Coast Bioregion Of Western Australia, Michael C. Mackie

Fisheries research reports

Final FRDC Report – Project Number 2004/051

Objectives

1. To identify species that aggregate to spawn within the WCB and to describe (e.g. location, size, timing, nature) the aggregations of key demersal species such as pink snapper and dhufish.

2. To investigate the biology, ecology and fishery for Samson fish with emphasis on the sports fishery targeting deep water spawning aggregations west of Rottnest Island.

3. To establish methods and protocols for monitoring fish aggregations within the WCB.

4. To review relevant information and provide advice on the impact of aggregation fishing and the management of aggregating fish species in …

Fisheries Research Report No. 176 - Regrowth Of Pilchard (Sardinops Sagax) Stocks Off Southern Wa Following The Mass Mortality Event Of 1998/99, Daniel J. Gaughan, M Craine, Peter Stephenson, Timothy I. Leary, Paul Lewis

Fisheries research reports

Final FRDC Report – Project 2000/135

This project produced time series of estimates of spawning biomass for pilchards in four purse seine management zones in Western Australia, three on the south coast and one on the west coast. The pilchard stocks in Western Australia have recovered strongly since the 1998/99 mass mortality.

This project has shown that the fishery independent and fishery dependent methods applied to Western Australia’s pilchard fisheries cannot provide precise estimates of the size of the pilchard spawning biomass in each management region. Although the trends indicated by the age-structured simulation model are reliable and provide good …

Fisheries Research Report No. 121 - Synopsis Of The Biology And Exploitation Of The Blue Swimmer Crab, Portunus Pelagicus Linnaeus, In Western Australia, Mervi I. Kangas

Fisheries research reports

This report summarises the existing studies which have provided information on the biology, population characteristics and exploitation of the blue swimmer crab, Portunus pelagicus, in Western Australia. Gaps in the existing knowledge are also highlighted to assist in targeting new research initiatives. Portunus pelagicus matures at about one year and in temperate regions females mate only once a year. This is because mature crabs moult only once a year. It appears from studies to date that Western Australian crabs are one genetic population. This is being further investigated. Migration of the blue swimmer crab occurs between estuaries and the ocean …