Estimating the sizeselection curves of towed gears, traps, nets and hooks
 Russell B. Millar,
 Robert J. Fryer
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A general statistical methodology for analysis of selectivity data from any type of fishing gear is presented. This formal statistical modelling of selectivity is built on explicit definitions of the selection process and specification of underlying assumptions and limitations, and this gives the resulting estimates of gear selectivity (and possibly fishing power) a clear interpretation. Application of the methodology to studies using subsampled catch data and to towed gears having windows or grids is outlined, and examples applied to passive nets and towed gears are presented. The analysis of data from replicate deployments is covered in detail, with particular regard to modelling the fixed and random effects of betweenhaul variation. Recent developments on the design of selectivity experiments are introduced and demonstrated.
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 Title
 Estimating the sizeselection curves of towed gears, traps, nets and hooks
 Journal

Reviews in Fish Biology and Fisheries
Volume 9, Issue 1 , pp 89116
 Cover Date
 19990301
 DOI
 10.1023/A:1008838220001
 Print ISSN
 09603166
 Online ISSN
 15735184
 Publisher
 Kluwer Academic Publishers
 Additional Links
 Topics
 Keywords

 experimental design
 fishing gear
 maximum likelihood
 SELECT
 size selectivity
 Authors

 Russell B. Millar ^{(1)}
 Robert J. Fryer ^{(2)}
 Author Affiliations

 1. Department of Statistics, The University of Auckland, Private Bag 92019, Auckland, New Zealand
 2. Marine Laboratory, Fisheries Research Services, Victoria Rd, Aberdeen, AB11 9DB, Scotland