Soybean protein concentrate as a protein source for turbot Scophthalmus maximus L
By O. Day, H. González. 2000
135 citations recorded by the source corpus.
In the first of two experiments, the effect of a gradual substitution of dietary fish meal with soybean protein concentrate (SPC) on growth, feed consumption and protein digestibility was examined in 13 g turbot Scophthalmus maximus. Five isonitrogenous and isoenergetic diets (50% protein and 22 kJ g−1) containing SPC at protein replacement levels of 0, 25, 50, 75 and 100% were offered by hand twice daily. Growth rates of fish fed diets with zero and 25% replacement were not significantly different, with SGRs of 2.47 and 2.28, respectively. At higher replacement levels, growth rates decreased significantly with SGRs of 2.00, 1.33 and 0.68, respectively. Feed conversion ratios increased with soya replacement, with values of 0.68, 0.75, 0.89, 1.27 and 2.32, respectively, although there was no significant difference between the first two. Feed consumption rates remained constant up to 50% replacement, above which they decreased significantly, possibly because of reduced diet palatability. Apparent protein digestibility (APD) was not affected by the incorporation of SPC and ranged from 82.8 to 87.5%. Results suggest that protein catabolism increases in SPC-rich diets, possibly because of rapid assimilation and utilization of the methionine supplement. In the second experiment, the importance of amino acid supplements and the beneficial effects of protecting these, either by coating them in protein or incorporating them in a protein–lipid emulsion, was investigated. Growth data provided some indication that the utilization of SPC may be improved by incorporating the methionine and lysine supplement in a protein–lipid emulsion prior to diet preparation, although this finding was not found to be statistically significant (0.1 < P < 0.2).
Subfields: Aquatic Science, Immunology, Physiology
View Paper: https://www.semanticscholar.org/paper/ae3a6da20b40df28e11b1a1432fe60efd168b50d
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Citations in the corpus
- Effect of dietary taurine supplementation on growth performance and bile salt activated lipase activity of common dentex, Dentex dentex, fed a fish meal/soy protein concentrate-based diet (2008, background): “The nutritional value and palatability of diets containing soybean meal can be improved by the addition of methionine and lysine or certain amino acid mixtures as attractants (Dias et al., 1997; Day and Gonzalez, 2000).”
- Increasing dietary plant proteins affects growth performance and ammonia excretion but not digestibility and gut histology in turbot (Psetta maxima) juveniles (2011, methodology): “The increase of FCR in fish fed diets PP52 and PP66 coincided with reduced protein utilization (PER and GPE) and agrees with some earlier studies evaluating PP inclusion in turbot diets (Day and González, 2000; Regost et al., 1999).”