Fishing gear experiments in Finland

Bagenal, T.B. (1981) Fishing gear experiments in Finland. In: Forty-nineth annual report for the year ended 31st March 1981. Ambleside, UK, Freshwater Biological Association, (Annual Report, Freshwater Biological Association, Ambleside)

[img]
Preview
PDF (The document's language is English .) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (172Kb) | Preview

Abstract

A comparison of some different European methods of estimating the numbers of fish in a lake using different fishing gear is described. The different gears used were 1. surface trawl used by night 2. bottom trawl used by day 3. trammel nets, set in the evening and lifted in the morning 4. surface seine net used by night 5. bottom seine net used by day 6. Fyke nets, emptied each morning and evening 7. gill nets, set in the evening and lifted in the morning. The most variable catches were from those gears used by day on the bottom and the least variable were those used by night at the surface. The work continued by examining the use of acoustic systems for pelagic fish stock assessment. This gear gave reasonable population estimates for pelagic fish 10m and more below the surface. The advantage of the accoustic method is that it is quick and requires little labour. Its disadvantage is that it is not possible to identify the species and so it must be supplemented by another, conventional method.

Item Type: Book Section
Title: Fishing gear experiments in Finland
Personal Creator/Author:
CreatorsEmail
Bagenal, T.B.
Title of Book: Forty-nineth annual report for the year ended 31st March 1981
Refereed: No
Series Name: Annual Report, Freshwater Biological Association, Ambleside
Date: 1981
Publisher: Freshwater Biological Association
Place of Publication: Ambleside, UK
Issuing Agency: Freshwater Biological Association
Uncontrolled Keywords: Acoustic equipment; Entangling nets; Experimental fishing; Fishery surveys; Fishery resources; Fishing gear; Gillnets; Population number; Seine nets; Trap nets; Trawl nets; Europe; Annual report
Subjects: Fisheries
Management
Item ID: 5310
Depositing User: Mrs Christine Davey
Date Deposited: 10 May 2011 14:00
Last Modified: 29 Sep 2011 15:07
URI: http://aquaticcommons.org/id/eprint/5310

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...