A management simulation model was developed to test quota, trip limits and reduced longline hook numbers as alternatives to yearly seasonal (November) closure in South Australian snapper fisheries. Population dynamics equations and maximum-likelihood parameter estimates were supplied by an age- and length-based stock assessment model. The relative performance of tested management strategies was quantified by comparing change in egg production vs change in average catch, to optimise the trade-off between reproductive sustainability and catch foregone. Clusters of better-performing strategies were visually identifiable in management strategy scatterplots. These scatterplots display percentage change from the status quo in egg-production-per-femalerecruit (y-axis) vs percentage change in catch-per-recruit (x-axis). Evaluated strategies fell into three distinct performance clusters. The best performing strategy extended November closure by 2 weeks. Strategies that retained the November closure performed uniformly better than those that removed it. Further simulation showed this resulted from non-closure strategies regulating only the commercial sector.

Item Type:	Refereed Article
Keywords:	daily trip limits, fishery management strategy simulation, management strategy performance clusters, management strategy scatterplots, snapper, temporal fishery closure
Research Division:	Agricultural and Veterinary Sciences
Research Group:	Fisheries Sciences
Research Field:	Aquatic Ecosystem Studies and Stock Assessment
Objective Division:	Animal Production and Animal Primary Products
Objective Group:	Fisheries - Wild Caught
Objective Field:	Wild Caught Fin Fish (excl. Tuna)
UTAS Author:	Burch, P (Dr Paul Burch)
ID Code:	92982
Year Published:	2011
Web of Science® Times Cited:	2
Deposited By:	Sustainable Marine Research Collaboration
Deposited On:	2014-07-03
Last Modified:	2014-12-18
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