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Optimising harvest strategies in a multi-species bivalve fishery


Gorman, D and Mayfield, S and Ward, TM and Burch, P, Optimising harvest strategies in a multi-species bivalve fishery, Fisheries Management and Ecology, 18, (4) pp. 270-281. ISSN 0969-997X (2011) [Refereed Article]

Copyright Statement

Copyright 2011 Blackwell Publishing Ltd.

DOI: doi:10.1111/j.1365-2400.2010.00781.x


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.

Item Details

Item Type:Refereed Article
Keywords:commercial fishery, decision tables, fisheries management, harvest controls, mixed-species, risk analysis
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture and fisheries stock assessment
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - wild caught
Objective Field:Wild caught edible molluscs
UTAS Author:Ward, TM (Associate Professor Timothy Ward)
UTAS Author:Burch, P (Dr Paul Burch)
ID Code:92983
Year Published:2011
Web of Science® Times Cited:7
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2014-07-03
Last Modified:2021-11-15

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