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Manual on Estimation of Selectivity for Gillnet and Longline Gears in Abundance Surveys

FAO Fisheries Technical Paper No. 397

Format: Paperback
Publisher: Food & Agriculture Organization of the United Nations (FAO), Rome, Italy
Published: 29th Apr 2008
Dimensions: h 300mm
ISBN-10: 9250044615
ISBN-13: 9789250044613
Barcode No: 9789250044613
ISSN: 0429-9345
This manual defines methods for estimating selectivity of gillnet and longline gears, with particular reference to the use of these gears in abundance surveys. The manual illustrates how gear design, the basic concepts of size selection and fish morphometric data can be used to model selectivity. Statistical estimation methods are described in detail, and examples given of their application in spreadsheets. The efficient use of these gears in abundance and research surveys is also discussed. Although the manual concentrates on gillnets and longlines, the methods given are general enough to be relevant to any research involving gear selectivity

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