Proximate Composition And Amino Acid Analysis: Agriprotein Company '
CHAPTER 5. DISCUSSION
5.1. Water quality
The average water temperature and average dissolved oxygen obtained during the experiment has been reported as the optimum range (3-10mg/l) for tilapia growth and yields (Meske, 1985). Siddiqui et al. (1989) stated that Oreochromis mossambicus has a low oxygen demand and can survive at low oxygen levels (1-2mg/l). Riche and Garling (2003) reported that dissolved oxygen levels should be maintained above 4.9 mg/l for best growth. The water quality tolerance limit of O.mossambicus for nitrite is 0-0.6 mg/l while for ammonia, it is 0-0.12mg/l (Robert, 1997). This falls within the range of values that were obtained throughout the whole experiment (Table 10).
5.2. Proximate composition and amino acid analyses …show more content…
In general comparison, there are no big differences between the proximate composition of the HM from both sources with the proximate composition expressed as % and amino acid composition expressed as % of crude protein. In general, the values of the % amino acids from literature are slightly higher than those from the Agriprotein Company. This may be due to the fact that the pre-pupae in the data from the literature were defatted while the one from the company was not. Defatting is known for increasing the availability of amino acid composition (Kroeckel et al, …show more content…
Separation of the cuticle from the protein and fat of the pre-pupae produces a superior feedstuff and improves the protein bioavailability. A preliminary analysis by Sheppard et al. (2008) indicated that cuticle weight is about 24% of the whole pre-pupae on a dry matter basis and the removal of this chitinous material improves performance and increases the percentage of fishmeal that can be replaced in diets for sensitive aquatic animals, while paying for the cost of removal by sales of the valuable
5.1. Water quality
The average water temperature and average dissolved oxygen obtained during the experiment has been reported as the optimum range (3-10mg/l) for tilapia growth and yields (Meske, 1985). Siddiqui et al. (1989) stated that Oreochromis mossambicus has a low oxygen demand and can survive at low oxygen levels (1-2mg/l). Riche and Garling (2003) reported that dissolved oxygen levels should be maintained above 4.9 mg/l for best growth. The water quality tolerance limit of O.mossambicus for nitrite is 0-0.6 mg/l while for ammonia, it is 0-0.12mg/l (Robert, 1997). This falls within the range of values that were obtained throughout the whole experiment (Table 10).
5.2. Proximate composition and amino acid analyses …show more content…
In general comparison, there are no big differences between the proximate composition of the HM from both sources with the proximate composition expressed as % and amino acid composition expressed as % of crude protein. In general, the values of the % amino acids from literature are slightly higher than those from the Agriprotein Company. This may be due to the fact that the pre-pupae in the data from the literature were defatted while the one from the company was not. Defatting is known for increasing the availability of amino acid composition (Kroeckel et al, …show more content…
Separation of the cuticle from the protein and fat of the pre-pupae produces a superior feedstuff and improves the protein bioavailability. A preliminary analysis by Sheppard et al. (2008) indicated that cuticle weight is about 24% of the whole pre-pupae on a dry matter basis and the removal of this chitinous material improves performance and increases the percentage of fishmeal that can be replaced in diets for sensitive aquatic animals, while paying for the cost of removal by sales of the valuable