สำนักราชบัณฑิตยสภา
The Journal of the Royal Institute of Thailand Volume II - 2010 Piamsak Menasveta, Somkiat Piyatiratitivorakul 83 Feeding occoured 4 times a day (8:00, 12:00, 16:00,and 20:00 hours). Since food conversion was one of the parameters, feeding was monitored and the feeding rate adjusted in accordance to how much food was being consumed. Data sampling on growth i.e. length and weight, survival, and water quality was done at two week intervals during the eight week experiment. Results and Discussion The proximate analysis of the six treatment diets is shown in Table 2. The protein content of the plant protein diets was approximately 3 to 5% lower than that in the animal protein diets. The addition of Finnstim resulted in a 1-2% increase of protein in the basal diets, depending on the amounts added. This evidence showed that Finnstim was a naturally concentrated protein. Table 3 and 4 summarized the effect of Finnstim on the growth of the shrimps, using length and weight as parameters. Each figure represented the mean and it’s standard deviation at various time intervals. The covariance analysis showed significant difference between the slopes of growth curves (length v.s. weeks) at a 95% confidence level. The pair tests showed no significant difference between slopes in the treatments with plant protein diet (PPC) and PPC + 0.75% Finnstim, PPC + 0.75% Finnstim and PPC + 1.5% Finnstim, PPC + 1.50% and animal protein (APC). The addition of 0.75% Finnstim in the plant protein diet was not enough to result in an appreciable benefit. The addition of Finnstim at 1.5% in the animal protein diet resulted in the highest growth performance (Table 5). Table 2. Proximate analysis of the six treatment diets. Protein Lipid Ash Plant Protein Control (PPC) 43.37 6.60 14.60 PPC + 0.75 % Finnstim 45.44 6.13 14.43 PPC + 1.50 % Finnstim 46.28 6.36 14.10 Animal Protein Control (APC) 49.57 5.08 10.77 APC + 0.75 % Finnstim 52.48 4.65 10.79 APC + 1.50 % Finnstim 53.29 4.30 10.71
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