Login | Request Account (DAF staff only)

Stock assessment of Queensland east coast school mackerel (Scomberomorus queenslandicus).

Lovett, R. A., Bessell-Browne, P., Litherland, L., Leigh, G. M., Campbell, A. B. and O'Neill, M. F. (2019) Stock assessment of Queensland east coast school mackerel (Scomberomorus queenslandicus). Technical Report. State of Queensland.



There has been no previous stock assessment for school mackerel. This stock assessment used an age structured model with a yearly time step and length based selectivity. Only the south-east stock was considered for assessment as harvests for the north-east stock were small. Data inputs included total harvest, standardised catch rates and age and length structures. The south-east coast stock model uses data from the 1988-89 to 2017-18 fishing years (comprising commercial harvest (1988-89 to 2017-18); recreational harvest (1994-95 to 2013-14); length structures (2014-15 to 2017-18) and age-length information (1991-92 to 1994-95)).

Model analyses suggested that biomass declined from the mid-2000s to around 65% of unfished biomass in 2017-18. Maximum sustainable yield (MSY) was estimated at 104–119 t per year, and the yield consistent with a biomass ratio of 60% was estimated at 84–95 t. The time series of harvests modelled may be underrepresented, causing an overestimate of the biomass ratio. Results reflect a low level of confidence, and precautionary interpretations are warranted.

Item Type:Monograph (Technical Report)
Corporate Creators:Department of Agriculture and Fisheries, Queensland
Business groups:Fisheries Queensland, Animal Science
Keywords:school mackerel, stock assessment, Queensland, fisheries
Subjects:Aquaculture and Fisheries > Fisheries
Aquaculture and Fisheries > Fisheries > Fishery resources
Aquaculture and Fisheries > Fisheries > Fishery for individual species
Live Archive:21 Nov 2019 04:57
Last Modified:03 Feb 2022 02:40

Repository Staff Only: item control page


Downloads per month over past year

View more statistics