Keywords : Ewes
Effect of protected methionine and lysine supplementation to Awassi ewes ration at flushing period on productive performance
Iraqi Journal of Veterinary Sciences,
Volume 33, Issue 2, Pages 105-109
This study was conducted on 32 of local Awassi ewes, average body weight 36.06±0.74 kg (aged 2-3 years, ewes were divided into two treatments. The first treatment (T1) the control contained 8 ewes fed on ration consist of barley, wheat bran, urea and wheat straw without supplement and the second (T2) was contained 24 ewes and fed on the same ration of control supplemented with protected amino acids (methionine 2.5 g and lysine 2.5 g) per ewe daily, the ewes were fed with restricted quantity 1 kg / ewe divided twice daily through the flushing and mating period which lasted 60 days, also all ewes was grazed for 6hr daily. Results was referred that protected amino acid supplement in T2 led to a significant (p<0.01) improvement in conception percentage 91.6%, prolificacy percentage 87.5% and lambing percentage 100% compared to T1 62.5%, 62.5% and 75% respectively, where is the differences was not significant in other traits. Blood parameters was showed significant (p<0.05) increase in glucose 67.91±2.06 mg/dl as compared to T1 59.25±1.72mg/dL, triglyceride was decreased significantly (p<0.05) in T2 42.66±0.96 mg/dl compared to T1 47.37±1.38 mg/dl. Concentration of AST enzyme was decreased (p<0.05) in T2 110.66±7.58 IU/l, while increased (p<0.05) ALT enzyme concentration 38.08±2.48 IU/l as compared to T1 which were 162.12±4.79 and 21.87±0.71IU/l respectively. In conclusion, Awassi ewes supplementation with protected methionine and lysine through flushing period enhance reproductive performance out of reproduction season.
The impact of melatonin administration on the fertility performance and several relating parameters during the breeding season in the Arabi ewes
Iraqi Journal of Veterinary Sciences,
Volume 33, Issue 2, Pages 461-468
A total of twenty-four healthy ewes aged between 2-3 years old and weighed about 35.09 kg of body weight were divided randomly into four groups (6 animals for each group). The first group included the non-treated control group, while the other three groups were subjected to various oral doses of melatonin 9 mg, 12 mg and 15 mg/head, respectively. All treatments were applied at 6 o'clock in the morning, to investigate the effect of treatment with melatonin during breeding season on reproductive performance and levels of some biochemical parameters in Arabi ewes from 1 May to 1 October 2017. Blood samples 7ml were collected after one hour of treatment and then monthly during the pregnancy months to determine the concentrations of biochemical parameters. After Postpartum, lambed ewes/lambs number, birth weight, placenta empty weight and cotyledon number were recorded. The results showed significant (P<0.05) improvement in reproductive performance (fertility percentage, twinning rate and the number of offspring) when ewes administrated melatonin at two doses (12 and 15 mg/ head). Also, melatonin administration caused significant (P<0.05) decrease in the concentrations of thyroxin, cortisol, and cholesterol. Conversely, there was a significant increase (P<0.05) in glucose concentration after 1 hour of treatment. The concentrations of thyroxin, cortisol, cholesterol, and vitamin C increased significantly (P<0.01) in early-gestation compared with mid and late-gestation, while the concentrations progesterone and glucose increased significantly (P<0.05) in mid-gestation compared with early and late-gestation. In conclusion, melatonin administration at doses 12 and 15 mg/ head improves ewe reproductive performance (fertility percentage, twinning rate and the number of born lambs). Additionally, the gestation stage has a negative effect on the concentrations of thyroxin, cholesterol and vitamin C.