Effect of dietary supplementation of methionine and/or lysine on growth performance and body composition of tilapia nilotica fingerlings

An experiment was conducted to evaluate the growth performance and body composition of Tilapia nilotica fingerlings fed diets supplemented with methionine and /or lysine at different levels. A total of 216 Tilapia nilotica of nearly similar weight [22 g] were allotted into 9 groups. Fish meal, soybean oil meal, ground yellow corn, wheat bran, cottonseed oil, carboxymethyl cellulose, mineral mixture and vitamin mixture were used to formulate a balanced basal diet. Methionine and lysine were supplemented in percentages of 0.0 + 0.0, 0.27 + 0.0, 0.54 + 0.0, 0.0 + 0.81, 0.0 + 1.62, 0.27 + 0.81, 0.27 + 1.62, 0.54 + 0.81, 0.54 + 1.62 to the diets 1 to 9, respectively. Fish of groups 2 to 9 which were fed on diets supplemented with methionine and /or lysine at different levels achieved the best values of the tested performance parameters [total and weekly body weight gain, SGR, FCR, PER, increase in length and condition factor] when compared to group 1 [control group] which was fed on the basal diet without any supplementation. The average dressing% and organoleptic characteristic score did not differ significantly between fish groups. The proximate fish body composition was not greatly affected by any dietary treatment. Retention of dry matter, crude protein and ash in fish of groups 2 to 9 showed the highest values when compared to those of group 1 [control group]. It can be concluded that supplementation of methionine and /or lysine to ordinary diets significantly improves the growth performance and nutrient retention of Tilapia nilotica

Effect of feeding over and unheated oil with or without vitamin E supplementation on growth and reproductive performance of Japanese quail

This work was conducted to study the effect of feeding diets containing 2-4% over and unheated oil with or without vitamin E supplementation on growth and reproductive performance of Japanese quail. A total of 288 one-day old Japanese quail were allotted into 9 groups. Quail of group 1 were fed on basal diet [BD] without any supplementation. Quail of groups 2 and 3 were fed on BD containing 2 and 4$ unheated oil. Quail of groups 4 and 5 fed the BD containing 2 and 4% over-heated oil. Quail of groups 6, 7, 8 and 9 were fed as groups 2, 3, 4 and 5, respectively, in addition to vitamin E supplementation [6 mg/kg diet during starting and growing periods and 12 mg/kg diet during the laying period]. From the results it was concluded that, the addition of 4% unheated oil and vitamin E to the used diet of quail improves their growth and reproductive performance

Effect of dietary supplementation of zinc and/or manganese on growth and reproductive performance of Japanese quail

This work was conducted to study the effect of dietary supplementation of zinc and /or manganese on growth and reproductive performance of Japanese quail. A total of 270 one-day old Japanese quail were used and allotted into 9 equal groups. Zinc and manganese were supplemented to the basal diet at different levels: 0 + 0, 0 + 90, 0 + 180, 25 + 0, 25 + 90, 25 + 180, 50 + 0, 50 + 90, 50 + 180 ppm in the starting and growing periods and at levels: 0 +0, 0 + 70, 0 + 140, 50 + 0, 50 + 70, 50 + 140, 100 + 0, 100 + 70, 100 + 140 ppm in the laying period. Addition of zinc and /or manganese improved the final body weight [at 6 weeks], total body gain, daily gain, body weight gain% relative to the control group and feed conversion ratio. The dressing%, organ weight and blood picture showed some variations in different quail groups. During the laying period, average egg production, egg mass and feed conversion ratio showed an improvement in treated groups when compared to the control one. Hatchability% of fertile eggs showed some variations in different quail groups. Eggs, yolk and albumen weights, shell thickness, shell weight and ash percentage of quail eggs in different treated groups showed a slight improvement when compared to the control one. It can be concluded that, addition of zinc and /or manganese to the ordinary diets of quail improves their growth performance and also slightly improves reproductive performance