Spawning and reproductive characteristics of Bight redfish and deepwater flathead in the Great Australian Bight trawl fishery

Funding Activity

Website
https://www.frdc.com.au/project/2003-003

Funding Status
Closed

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Funded Activity Summary

Bight redfish (Centroberyx gerrardi) and deepwater flathead (Neoplatycephalus conatus) are the two principle commercial species captured along the continental shelf of the Commonwealth managed Great Australian Bight Trawl Fishery worth an estimated $7 million per annum.

Current assessments, based on available data, indicate that Bight redfish fishing mortality is rising and likely to reduce the biomass to below the trigger biological reference point. The outcomes of stock assessments are highly sensitive to the shape of the maturity ogive and fecundity-length/age relationships. Given the current high uncertainty about the validity of existing Bight redfish and deepwater maturity and fecundity relationships, GABFAG has recommended that these be determined with high priority. More scientifically defensible maturity ogives and fecundity-length and fecundity-age relationships will markedly reduce uncertainty in the stock assessments.

Objectives:
1. Determine maturity ogives (against length/age) and sex ratios of spawning Bight redfish and deepwater flathead.
2. Describe gonad maturation cycles and determine the relationship between egg production (fecundity) and length/age in female Bight redfish and deepwater flathead
3. Conduct per recruit analysis to identify harvest strategies which allow optimum Bight redfish and deepwater flathead egg production (and therefore recruitment)
4. Provide Industry, GABMAC and stock assessment scientists with information on GABTF species biology.

Funded Activity Details

Start Date: 30-06-2003

End Date: 04-06-2006

Funding Scheme: Funding Scheme not available

Funding Amount: $89,975.00

Funder: Fisheries Research and Development Corporation

Research Topics

ANZSRC Field of Research (FoR)

There are no FoR codes available for this funding activity

ANZSRC Socio-Economic Objective (SEO)

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Other Keywords

Ageing | Biology | Fishing Gear | Population Dynamics | Reproduction

Related Links

ACN 633 798 857