Sampling gear selectivity and its effect on estimates of mean length at age

Gear selection and sampling gears. Proceedings of the seventh IMR-PINRO Symposium. Murmansk, 23-24 June 1997. Using data fiom the Norwegian bottorn trawl surveys in the Barents Sea in February ( 1989- 1996), the International O-group surveys in the Barents Sea (1 985-1 996) and previously estimaied...

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Bibliographic Details
Main Author: Korsbrekke, Knut
Format: Conference Object
Language:English
Published: PINRO Press 1997
Subjects:
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924
Barents Sea
Murmansk
Online Access:http://hdl.handle.net/11250/107617
Description
Summary:Gear selection and sampling gears. Proceedings of the seventh IMR-PINRO Symposium. Murmansk, 23-24 June 1997. Using data fiom the Norwegian bottorn trawl surveys in the Barents Sea in February ( 1989- 1996), the International O-group surveys in the Barents Sea (1 985-1 996) and previously estimaied selectivity for the standard Norwegian sampling gears, effects on estimates of mean length and weight at age are shown. For the younger fish rnean lengths at age are biased upwards, the relative bias increasing with decreasing size.

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