Port sampling of tuna longline catches for swordfish (Xiphias gladius) size composition in 2005–06.

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FAR_2013_29_1317_TUN2005-02.pdf

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FAR_2013_29_1317_TUN2005-02.pdf (461.8 kb)

Abstract
A shore-based catch sampling programme for swordfish was developed and implemented which was cost-effective, statistically sound and achieved high coverage of landings. Individual processed weights were collected electronically from licensed fish receivers, and a predictive relationship was used to convert these to catch-at-length. Length-specific sex ratios derived from scientific observer data was projected onto the estimates of catch-at-length to estimate sex-specific catch-at-length.

Document date
Monday, 8 July 2013

Document type
V 1.3

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Adobe PDF

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461.8 kb

Reference number
2013/29

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FAR_2013_29_1317_TUN2005-02.pdf

Uploaded date
Wednesday, 8 May 2013

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FAR: 2013/29;
ISSN: 1179-5352;
ISBN: 978-0-478-41404-2;
ScienceStock: HMS;
Species: swordfish, Xiphias gladius;
Stock: SWO;
FishingMethod: target line, longline;
ResearchField: shore-based catch sampling programme, length-specific sex ratio;
Author: Davies; Griggs;

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