A Comparison of Inert Markers Used to Estimate Protein Digestibility in the Leader Prawn Penaeus monodon |
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| Authors: | M J Deering D R Hewitt H Z Sarac |
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| Institution: | Zoology Department, University of Queensland, Brisbane Qld 4072, Australia;Bribie Aquaculture Research Centre, P.O. Box 191, Bribie Island Qld 4507, Australia |
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| Abstract: | Abstract.— Acid insoluble ash, chromic oxide and ytterbium acetate were evaluated as digestibility markers in practical diets for leader prawns Penaeus monodon . Apparent protein digestibility coefficients ranged from 79.4% for chromic oxide to 82.6% for ytterbium acetate and were similar regardless of the marker used (P < 0.05). Coefficients of variation of protein digestibility coefficients ranged from 2.1% for ytterbium acetate to 4.9% for acid insoluble ash. Methods for selecting dietary markers for use are discussed. |
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