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Stock assessment of the Australian east coast grey mackerel (Scomberomorus semifasciatus) fishery.

Bessell-Browne, P., Lovett, R., Leigh, G., O'Neill, M.F. and Campbell, A. (2019) Stock assessment of the Australian east coast grey mackerel (Scomberomorus semifasciatus) fishery. Technical Report. State of Queensland.

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Abstract

This stock assessment used an age structured model with a yearly time step and age based selectivity to estimate the population size and sustainable harvest limits for Queensland east coast grey mackerel. Separate models were assessed for the north-east and south-east stocks. Data inputs included total harvest, standardised catch rates, age and length structures. For both stocks, unfished biomass was relative to 1960-61, before substantial fishing pressure began.
 
For the north-east stock, model results suggested that biomass declined to 46 per cent unfished, exploitable biomass in 2010-11. The assessment suggests that the north-east stock is currently between 37 and 58 per cent unfished biomass.
 
For the south-east stock the results suggest that biomass declined to 38 per cent unfished biomass in 2010-11. The assessment suggests that the south-east stock is currently between 40 and 61 per cent of unfished biomass.

Item Type:Monograph (Technical Report)
Corporate Creators:Department of Agriculture and Fisheries, Queensland
Business groups:Fisheries Queensland
Keywords:grey mackerel, stock assessment, Queensland, fisheries, biomass
Subjects:Aquaculture and Fisheries > Fisheries
Aquaculture and Fisheries > Fisheries > Fishery resources
Aquaculture and Fisheries > Fisheries > Fishery for individual species
Deposited On:21 Nov 2019 05:00
Last Modified:21 Nov 2019 05:00

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