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The effect of various methods of fish sampling on estimated carcass chemical composition following a feeding trial
Coelho, J.S.; Gomes, E.S. (1989). The effect of various methods of fish sampling on estimated carcass chemical composition following a feeding trial, in: De Pauw, N. et al. (Ed.) Aquaculture: a biotechnology in progress: volume 1. pp. 625-630
In: De Pauw, N. et al. (Ed.) (1989). Aquaculture: a biotechnology in progress: volume 1. European Aquaculture Society: Bredene, Belgium. ISBN 90-71625-03-6. 1-592 pp., more

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Document type: Conference paper

Keyword
    Marine

Authors  Top 
  • Coelho, J.S.
  • Gomes, E.S.

Abstract
    After a growth trial in which rainbow trout (Salmo gairdneri) were raised from a weight of 4.4g up to 23g (average weight), using two diets (diet A-40% crude protein and 13% ether extract; diet B-33% crude protein and 19% ether extract), a carcass analysis was carried out in eight duplicate treatments. For each treatment, within the same diet, sampling of fish for carcass analysis was performed in one of four ways. 1) by taking four random samples from the minced and homogenized whole treatment group; 2) by quickly sampling live fish from a bucket, taking a few large-, medium-, and small-sized fish, for individual analysis; 3) by taking two fish at random from each of four blocks, based on individual final measured weight and analyzing them individually; 4) by taking eight fish, having the mean weight of the group, for individual analysis. Growth rate and feed conversion efficiency were similar between and within the two dietary treatments. A statistically significant (P

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