University of Tasmania
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Use of management strategy comparison scatterplots to identify clusters of high-performing strategies

journal contribution
posted on 2023-05-18, 01:51 authored by McGarvey, R, Paul BurchPaul Burch, Feenstra, JE
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.

History

Publication title

Fisheries Management and Ecology

Volume

18

Issue

5

Pagination

349-359

ISSN

0969-997X

Department/School

Institute for Marine and Antarctic Studies

Publisher

Blackwell Publishing Ltd

Place of publication

9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg

Rights statement

Copyright 2011 Blackwell Publishing Ltd.

Repository Status

  • Restricted

Socio-economic Objectives

Wild caught fin fish (excl. tuna)