scholarly journals Feed consumption, growth and growth efficiency of rainbow trout (Oncorhynchus mykiss (Walbaum)) fed on diets containing a bacterial single-cell protein

1995 ◽  
Vol 73 (4) ◽  
pp. 591-603 ◽  
Author(s):  
W. M. K. Perera ◽  
C. G. Carter ◽  
D. F. Houlihan
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Single Cell ◽  
Growth Rates ◽  
Nutritive Value ◽  
Absorption Efficiency ◽  
Single Cell Protein ◽  
Feed Consumption ◽  
Cell Protein ◽  
Consumption Rates

The aim of the present study was to compare the nutritive value of bacterial single-cell protein (BSCP) with that of fishmeal in rainbow trout (Oncorhynchus mykiss (Walbaum)). Four diets were formulated to contain a total of 458 g crude protein/kg of which 0% was from BSCP in diet 1 (BSCP-0), 25% in diet 2 (BSCP-25), 62·5% in diet 3 (BSCP-62·5) and 100% in diet 4 (BSCP-100); the remainder of the protein was from fishmeal. There were two studies: in study 1, duplicate groups of twenty-five fish were fed on one of the four experimental diets at the rate of 20 g/kg body weight per d for 132 d. Feed consumption rates of individual fish were measured using radiography and the overall apparent absorption efficiency for N in each group was measured over a 2-week period. In study 2, N intake, consumption, absorption and accretion were measured for each fish under controlled environmental conditions (12 h:12 h light-dark regime; 14°). Higher dietary levels of BSCP resulted in significantly higher feed consumption rates but reduced N absorption efficiency and growth rates. However, a diet containing 25% BSCP (75% fishmeal) did not significantly influence growth rates, feed consumption and absorption efficiency compared with a 100% fishmeal diet. The N growth efficiencies were highest in fish fed on the diet containing the highest level of fishmeal and significantly decreased with increasing BSCP content. Construction of N budgets demonstrated that the reduction in growth in fish eating an increasingly larger proportion of BSCP was due to a decrease in N absorption and an increase in the excretion of urea.

scholarly journals Evaluation of a Bacterial Single-Cell Protein in Compound Diets for Rainbow Trout (Oncorhynchus mykiss) Fry as an Alternative Protein Source

Animals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1676
Author(s):  
Abbas Zamani ◽  
Maryam Khajavi ◽  
Masoumeh Haghbin Nazarpak ◽  
Enric Gisbert
Keyword(s):  
Rainbow Trout ◽  
Amino Acid ◽  
Oncorhynchus Mykiss ◽  
Single Cell ◽  
Single Cell Protein ◽  
Cell Protein ◽  
Efficiency Ratio ◽  
Fishmeal Replacement ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Alternative Protein

A 60-day trial was conducted in rainbow trout (Oncorhynchus mykiss) fry (initial weight = 2.5 ± 0.6 g) to evaluate the potential use of a bacterial single-cell protein (SCP) as an alternative protein source. Five experimental diets with different levels of fishmeal replacement (0, 25, 50, 75 and 100%) and no amino acid supplementation were tested. At the end of the trial, we found that fry fed diets, replacing 25 and 50% of fishmeal with bacterial SCP, were 9.1 and 21.8% heavier, respectively, than those fed the control diet (p < 0.05), while Feed Conversion Ratio (FCR) values were also lower in comparison to the reference group. These results were also supported by Protein Efficiency Ratio (PER) and Lipid Efficiency Ratio (LER) values that improved in fish fed diets replacing 50% fishmeal by bacterial SCP. The inclusion of SCP enhanced Feed intake (FI) (p < 0.05), although FI was reduced at higher inclusion levels (>50%), which was associated to feed palatability. High levels of bacterial SCP (>50%) affected the muscular amino acid and fatty acid profiles, imbalances that were associated to their dietary content. The broken-line regression analysis using muscle DHA content and weight gain data showed that the maximum levels of fishmeal replacement by bacterial SCP were 46.9 and 52%, respectively.

scholarly journals Pengaruh Level Subtitusi Protein Sel Tunggal (Cj Prosin) Pada Pakan Komersial Terhadap Performan Ayam Broiler

2012 ◽  
Vol 12 (1) ◽  
pp. 7-15
Author(s):  
Samadi Samadi ◽  
Mira Delima ◽  
Zuraida Hanum ◽  
Muhammad Akmal
Keyword(s):  
Body Weight ◽  
Single Cell ◽  
Animal Feed ◽  
Body Weight Gain ◽  
Single Cell Protein ◽  
Conversion Ratio ◽  
Feed Consumption ◽  
Cell Protein ◽  
Feed Conversion ◽  
Commercial Feed

The effect of level substitution of single cell protein (CJ Prosin) by commercial feed on broiler performanceABSTRACT. A research to find out the effect of the substitution level of single cell protein in commercial feed on Broiler’s performance was conducted from June to December 2011. The purpose of this experiment is to find out alternative protein sources for animal feedstuff that can be used as protein substitution in animal feed on body weight, feed consumption and feed conversion efficiency. The experiment is considered as preliminary experiment to observe the response of single cell protein on broiler performance. This research was carried out at experimental farm, Animal Husbandry Department, Syiah Kuala University. Totally, 250 DOC of Cobb breed with the average body weight 36,78±2,32 gr. used in this experiment. Completely Randomized Design was applied in this experiment with 5 treatments; P0 (commercial feed), P1(commercial feed substituted with 6% SCP), P2 (commercial feed substituted with 12% SCP) dan P3 (commercial feed substituted with 18%CSP). Each treatment consist of 5 replications with total of 20 treatment’s units. Feed was formulated with isoprotein and isoenergy based on NRC requirement ( 23% protein ; 3200 kcal ME/kg at the age of 1-2 week and 20 % protein ; 3200 kcal ME/kg at the age of 4-7 week). Data was analyzed by using SPSS program SPSS (Window 2008). Differences between treatment were stated by Duncan’s multiple range test. The results of the experiment showed that commercial feed substituted with the level of SCP was not significantly difference (P0.05) on body weight gain, feed consumption, and feed conversion ratio. On the other hand, administration of SCP as substituted feed commercial on the level of 12 % and 16 % influenced significantly (P0.05) on body weight gain and feed conversion ratio, but not on feed consumption at the level of 12% SCP. As a conclusion, the use of SCP as animal feed sources in commercial feed only could be tolerated at the level of 6%.

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