caa a22 4500 605464790 CHVBK 20210128100259.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s10499-014-9873-4 doi (NATIONALLICENCE)springer-10.1007/s10499-014-9873-4 Comparison of hydrolysed proteins from different raw materials in diets for Mozambique tilapia Oreochromis mossambicus [Elektronische Daten] [N. Goosen, L. De Wet, J. Görgens] The study aimed to compare three fish protein hydrolysates (FPH) from different origins as dietary ingredients for Mozambique tilapia Oreochromis mossambicus. The ingredients were self-prepared fish silage from rainbow trout viscera and two commercial FPH products from shrimp and mixed marine by-products. Each ingredient was further included at two dietary levels: a low level where hydrolysed protein contributed 20gkg−1 protein to the diet and a high level where protein contribution was 40gkg−1. It was found that all three FPH products sustained high specific growth rates in excess of 2.5% of body weight per day at both inclusion levels and that there were no negative impacts on production performance, animal health or intestinal gross morphology compared to the control. Further, there were no significant differences in specific growth rate, feed conversion, dress-out %, non-specific immunity parameters or intestinal morphology between any treatments. However, low inclusion of FPH from mixed marine origin (treatment HCL) showed significantly higher growth than high inclusion of self-prepared silage (treatment SH) through significantly higher final animal length and height; a simultaneous significant decrease in Jones condition factor in treatment HCL might be explained by a change in animal body composition. It is concluded that all FPH products were acceptable feed ingredients at the inclusion levels investigated; however, differences in animal growth seen between treatments HCL and SH might be the result of the different inclusion levels employed, and the FPH raw material origin. Further, interpretation of animal condition factor should also take into account supplementary trial data, as differences between treatments might not signify differences in animal well-being, but rather changes in body composition. Springer International Publishing Switzerland, 2014 Comparative growth study nationallicence Fishmeal replacement nationallicence Fish protein hydrolysates nationallicence Fish silage nationallicence Intestinal morphology nationallicence Non-specific immunity nationallicence ANOVA : Analysis of variance nationallicence FCR : Feed conversion ratio nationallicence FPH : Fish protein hydrolysate nationallicence H : Height nationallicence IG : Serum immunoglobulin nationallicence Jones CF : Jones condition factor nationallicence L : Length nationallicence mg : Milligram nationallicence ml : Millilitre nationallicence SE : Standard error of the mean nationallicence SGR : Specific growth rate nationallicence t : Time nationallicence TP : Serum total protein nationallicence W : Weight nationallicence Wid : Width nationallicence µg : Microgram nationallicence Goosen N. Department of Process Engineering, Stellenbosch University, Matieland, Private Bag X1, 7602, Stellenbosch, South Africa aut De Wet L. Feed Technology Group, Division of Aquaculture, Department of Genetics, Stellenbosch University, 7600, Stellenbosch, South Africa aut Görgens J. Department of Process Engineering, Stellenbosch University, Matieland, Private Bag X1, 7602, Stellenbosch, South Africa aut Aquaculture International Springer International Publishing 23/5(2015-10-01), 1165-1178 0967-6120 23:5<1165 2015 23 10499 https://doi.org/10.1007/s10499-014-9873-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10499-014-9873-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Goosen N. Department of Process Engineering, Stellenbosch University, Matieland, Private Bag X1, 7602, Stellenbosch, South Africa aut NATIONALLICENCE 700 1- De Wet L. Feed Technology Group, Division of Aquaculture, Department of Genetics, Stellenbosch University, 7600, Stellenbosch, South Africa aut NATIONALLICENCE 700 1- Görgens J. Department of Process Engineering, Stellenbosch University, Matieland, Private Bag X1, 7602, Stellenbosch, South Africa aut NATIONALLICENCE 773 0- Aquaculture International Springer International Publishing 23/5(2015-10-01), 1165-1178 0967-6120 23:5<1165 2015 23 10499