FAR 2015/16 Size, maturity and age composition of porbeagle sharks observed in New Zealand tuna longline fisheries.

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FAR_2015_16_2895_HMS201302 Obj1_MS5.pdf

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FAR_2015_16_2895_HMS201302 Obj1_MS5.pdf (866.6 kb)

Abstract
This report assesses the catch composition of porbeagle sharks taken by surface longlines in New Zealand waters. Length-frequency distributions, maturity and reproductive status were assessed from observer data. An ageing protocol was developed using vertebral sections, and growth curves and a scaled age-frequency distribution of the catch were generated. The proportions of mature sharks caught were estimated.

Document date
Thursday, 16 April 2015

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V 1.3

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Adobe PDF

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866.6 kb

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2015/16

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FAR_2015_16_2895_HMS201302 Obj1_MS5.pdf

Uploaded date
Thursday, 16 April 2015

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FAR: 2015/16;
ISSN: 1179-5352;
ISBN: 978-0-477-10562-0;
ScienceStock: Highly migratory species;
Species: Lamna nasus; Porbeagle sharks;
FishingMethod: midwater trawl; surface longline fishery;
ResearchField: ageing; maturity; Porbeagle shark. highly migratory species;
Author: Francis; MP;

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