Effects of Fecal Collection Methods on Estimation of Digestibility of Protein Feedstuffs by Winter Flounder

Autor: J. D. Castell, J. M. Ramsay, C. D. Hebb, D. M. Anderson
Rok vydání: 2000
Předmět:
Zdroj: North American Journal of Aquaculture. 62:168-173
ISSN: 1548-8454
1522-2055
DOI: 10.1577/1548-8454(2000)062<0168:eofcmo>2.3.co;2
Popis: An accurate method for estimating digestibility of nutrients is essential when developing diets suitable for aquaculture species. Two methods of fecal collection (stripping and sedimentation) were evaluated for estimating crude protein and gross energy digestibility of three protein sources by juvenile (159 ± 8.48 g) winter flounder Pleuronectes americanus in a 3 × 2 factorial design experiment (protein × method) with three replicates of each diet. Fish meal (FM), canola protein concentrate (CPC), and soybean meal (SBM) were the three protein sources and were each included as 15% of a marine fish diet. Chromic oxide (0.5% of dry matter) was added as an inert marker. Crude protein digestibilities determined for stripped feces were significantly higher (P < 0.05) than for feces collected by sedimentation. Gross energy digestibilities based upon stripped fish were also higher (P < 0.05) than those from the sedimentation method. No significant differences in digestibility occurred among the diets con...
Databáze: OpenAIRE
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