The durability of different fish cage materials and the pros and cons of cage rotation

Christensen, M.S. (1995) The durability of different fish cage materials and the pros and cons of cage rotation. Naga, the ICLARM Quarterly, 18(2), pp. 20-21.

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Official URL: http://www.worldfishcenter.org/Naga/na_2224.pdf

Abstract

The procedures described are standard methods used in the European Union to quantify wood quality. Samples used here were smaller than the standards laid down in the DIN system (12 x 12 x 16 cm) as Litsea is a small tree and planks of the required size are unobtainable. The use of quality sized samples means that the results presented here can be compared with each other but unfortunately not with data in the literature. Wood is dried first at ambient temperature in the shade to reduce moisture content to an even 11-12%. Part of the sample was then oven-dried to 0% moisture content and its specific density determined by weighing a subsample of 128 cm super(3) (4 x 4 x 8 cm). Strength of expansion of the wood is determined as the percentage by which the wood sample can be pulled apart parallel and vertical to the grain before it breaks. Compression and bending strengths and elasticity are measured by compressing, bending and pulling wood sample in a machine specially designedto determine the forces required.

Item Type: Article
Title: The durability of different fish cage materials and the pros and cons of cage rotation
Personal Creator/Author:
CreatorsEmail
Christensen, M.S.
Journal or Publication Title: Naga, the ICLARM Quarterly
Volume: 18
Number: 2
Page Range: pp. 20-21
Date: 1995
ISSN: 0116-290X
Issuing Agency: WorldFish Center
Uncontrolled Keywords: Cages; Gear construction; Gear materials; Cage culture
Subjects: Aquaculture
Fisheries
Item ID: 9122
Depositing User: Mr William Ko
Date Deposited: 26 Nov 2012 17:36
Last Modified: 26 Nov 2012 17:36
URI: http://aquaticcommons.org/id/eprint/9122

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