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Optimising harvest strategies in a multi-species bivalve fishery
journal contributionposted on 2023-05-18, 01:51 authored by Gorman, D, Mayfield, S, Timothy WardTimothy Ward, Paul BurchPaul Burch
Optimising harvests from fishery resources requires appropriate data. In this study, fishery-independent survey and size-at-first maturity (L50) data were used to assess the suitability of current minimum legal sizes (MLS) and total allowable commercial catches (TACC) in the South Australian, mixed-species, mud-cockle (Katelysia spp.) fishery. Estimates of L50 suggested the MLS was conservative in one fishing zone (Coffin Bay), but appropriate elsewhere. Harvestable-biomass estimates (HB) demonstrated that TACCs were excessive in the Port River (41% of HB), suitable in Coffin Bay (10% of HB) and precautionary in the West Coast (1.5%of HB) fishing zones. Consequently, the MLS was decreased by 5 mm shell length in Coffin Bay and the TACCs for the Port River (reduced by 80%) and West Coast (increased by 40%) amended. This study demonstrated that harvest strategies in mixed-species fisheries can be optimised by explicitly considering data on species composition, abundance and population biology.
Publication titleFisheries Management and Ecology
Department/SchoolInstitute for Marine and Antarctic Studies
PublisherBlackwell Publishing Ltd
Place of publication9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg
Rights statementCopyright 2011 Blackwell Publishing Ltd.