Conference Proceedings

Modelling trends including effects of natural disturbance in an abalone dive fishery in Australia

Harry Gorfine, Jim Thomson, Daniel Spring, Michael Cleland



Abstract: Fisheries management strategies usually do not consider secondary consequences of environmental shocks. A recent viral disease outbreak that decimated blacklip abalone populations in southern Australia had a much smaller impact on the region's less-abundant greenlip abalone populations. Decreases in total allowable commercial catch (TACC) for blacklip abalone were partially offset by a transient increase in greenlip abalone TACC that peaked in 2010 and reduced to zero in 2013. A hypothesis that the greenlip abalone stock had declined was supported by a Bayesian analysis of catch rates (catch per unit effort, CPUE, as a proxy for biomass). The estimated decline is consistent with de..

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Funding Acknowledgements

Data acquisition occurred under predecessor organizations of the Victorian Fisheries Authority that funded the original data processing and model development. The majority of the work for this particular application to an analysis of greenlip data was unfunded, with co-authors undertaking the work pro-bono, in some instances under the auspices of their university affiliations. Nevertheless, the Victorian abalone industry and government are acknowledged for their initiative in organizing the logging of spatially resolved catch and effort information. Kylie Hall is warmly thanked for carefully reading the manuscript to identify grammatical errors, recommend corrections, and suggest improvements in expression. We gratefully acknowledge two anonymous reviewers and the guest editor for their erudite assistance with improving the manuscript during the revision process.