Estimating the size-selection curves of towed gears, traps, nets and hooks

Estimating the size-selection curves of towed gears, traps, nets and hooks 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 between-haul variation. Recent developments on the design of selectivity experiments are introduced and demonstrated. Reviews in Fish Biology and Fisheries Springer Journals

Estimating the size-selection curves of towed gears, traps, nets and hooks

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Kluwer Academic Publishers
Copyright © 1999 by Kluwer Academic Publishers
Life Sciences; Freshwater & Marine Ecology; Zoology
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