University Of Tasmania

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Using an inverse-logistic model to describe growth increments of blacklip abalone (Haliotis rubra) in Tasmania

journal contribution
posted on 2023-05-16, 21:20 authored by Malcolm HaddonMalcolm Haddon, Craig MundyCraig Mundy, Tarbath, D
A new description of growth in blacklip abalone (Haliotis rubra) with the use of an inverse-logistic model is introduced. The inverse-logistic model avoids the disadvantageous assumptions of either rapid or slow growth for small and juvenile individuals implied by the von Bertalanffy and Gompertz growth models, respectively, and allows for indeterminate growth where necessary. An inverse-logistic model was used to estimate the expected mean growth increment for different blacklip abalone populations around southern Tasmania, Australia. Estimates of the time needed for abalone to grow from settlement until recruitment (at 138 mm shell length) into the fishery varied from eight to nine years. The variability of the residuals about the predicted mean growth increments was described with either a second inverse-logistic relationship (standard deviation vs. initial length) or by a power relationship (standard deviation vs. predicted growth increment). The inverse-logistic model can describe linear growth of small and juvenile abalone (as observed in Tasmania), as well as a spectrum of growth possibilities, from determinate to indeterminate growth (a spectrum that would lead to a spread of maximum lengths).


Publication title

Fishery Bulletin








Institute for Marine and Antarctic Studies


U.S Department of Commerce

Place of publication


Repository Status

  • Restricted

Socio-economic Objectives

Fisheries - wild caught not elsewhere classified

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