Jade Perch Scortum barcoo having an initial average weight of 7.28 ± 0.13 g (mean ± SE) were cultured in a recirculating system at different feeding frequencies that included one, two, three, or four meals a day at 5% body weight per day. Treatments were performed in triplicate using 65 fish in each replicate. After 72 d, the survival, growth, feeding efficiencies, body indices, plasma biochemistry, whole‐body proximate composition, and muscle cholesterol were measured while histological sections of the liver were stained for glycogen with periodic acid Schiff. Results showed that growth was best when fish were fed three times a day, which was significantly higher than those fed one, two or four times a day. Feeding efficiencies were significantly better for fish fed two or three times a day. Plasma glucose, plasma cholesterol, periodic acid Schiff staining intensity of the liver, and hepatosomatic index were significantly higher for fish fed three times a day compared with once a day. Whole‐body crude protein was significantly lower for fish fed once a day compared with treatments of two or four times a day. Muscle cholesterol tended to increase with increasing feeding frequencies, but the results were not significant. No significant treatment effect was detected on the plasma mineral content. Based on a feeding rate of 5% body weight/d, it is recommended that feedings are divided into three meals a day to increase available energy for optimal growth.
This study was conducted in the animal field of the Al-Kafeel Company from November 2019 till May 2020 to investigate the possible association between growth hormone (GH) and thyroxine (T4) with the growth traits in Awassi and Karakul sheep. The total number of animals which used in the study was 60 lambs, 28 (13 males and 15 females) from Karakul and 32 (18 males and 14 females) from Awassi. Blood samples were collected at birth, weaning, and six months of age, and both GH and T4 concentrations were measured. Results showed higher values of T4 for Karakul as compared with Awassi at birth and weaning. Karakul breed was also exhibited significantly higher values of GH over Awassi breed only at weaning, while, no significant differences were observed at birth and six months of age. Karakul lambs showed higher weights as compared with Awassi lambs at all studied periods. A highly significant (p < 0.01) positive correlation was observed between T4 concentration and the weight of lambs at most studied periods. Whereas, GH did not exhibit any correlation with growth traits measured in both breeds. The elevated T4 might be one of the reasons for superiority of Karakul over Awassi breed in live body weights. This high correlation between T4 and growth traits could be used in the early selection of lambs to improve the weights of sheep at marketing.
This experiment was conducted in the poultry field of the Department of Animal Resources, College of Agriculture, Al-Qasim Green University, to study the effect of aspartic acid on the product characteristics and the percentages of cuts of broilers. In the experiment 135 birds were used, type 308 Rose, one day old, unsexed, with an average weight of 42 g / bird, and randomly distributed to three treatments, at the rate of three replications for each treatment, and each replicated 15 chicks, where aspartic acid was added to drinking water for the treatments according to the following ratios (T1 0 mg / Liters of water, T2 500 mg/liter of water, T3 700 mg/liter of water) as the results of the experiment showed a high significance for the T2 and T3 treatments compared to the T1 control treatment in live body weight for the third, fourth and fifth weeks, respectively, as well as the high significance of the T2 and T3 treatments compared to the control treatment in The weight gain characteristic of the second, third, fourth and fifth weeks, respectively, as well as in the characteristic of feed consumption. It was observed that there was a higher significance for the T2 and T3 treatments compared to the T1 control treatment for the first, second, and third weeks. As for the efficiency of the Food conversion, the significance was high for the T2 and T3 treatments compared to the control treatment for the first, third, and fourth weeks. Moreover, for the carcass cuts, the significance was high for the T2 treatment only for the chest and neckpieces only compared to the rest of the other treatments. So. We conclude from this experience that there are a benefit and importance to give aspartic acid to improving the product characteristics as well as the proportions of the meat chicken pieces.
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