The Effect of Injectable Vitamin e and Trace Minerals (Selenium, Calcium, Phosphate, Copper, and Cobalt) on Reproductive Performance During Non-Breeding Season in Awassi Ewes (original) (raw)
Related papers
Tropical Animal Health and Production, 2019
The aim of the current study was to investigate the effects of injecting estrus-synchronized ewes with vitamin E and selenium (Se) on their reproductive performance. Awassi ewes (n = 74) were randomly assigned into one of two groups. Group one (control, n = 36) did not receive vitamin E/Se injections, and group two (vitamin E/Se, n = 38) received 13.6-mg/kg BW of vitamin E plus 0.045-mg/kg BW of Se. Concurrent with estrus-synchronization program, vitamin E/Se injections were given at the time of insertion, withdrawal, and 19 days after withdrawal of intravaginal sponges. At all injection times, serum samples were collected (20 ewes per group) to measure Se contents. Pregnancy rates were evaluated by progesterone assay and by ultrasonography, respectively, at days 19 and 40 after sponge removal. Lambing rate, singles and twins%, sex ratio (M:F), and birth weight were recorded at lambing. Vitamin E/Se injections did not affect (P > 0.25) BW at lambing or BW change of ewes from breeding to lambing. Vitamin E/Se injections tended (P = 0.08) to decrease total pregnancy losses from 44.8 to 24.3%, subsequently, injections positively improved (P < 0.05) pregnancy rates determined by progesterone assay (from 80.6 to 97.4%) and ultrasonography (from 63.9 to 86.8%). Although overall fertility was not affected, vitamin E/Se injections markedly increased the percentage of ewes that lambed after only one service from 64.0 to 93.3%. Singles and twins%, lamb sex ratio, and birth weight of lambs were not affected (P > 0.20) by vitamin E/Se injections. Under conditions of our study, multiple injections of vitamin E/Se improved the reproductive performance of estrus-synchronized ewes.
Veterinary Journal of Mehmet Akif Ersoy University
The aim of this study was to evaluate the effect of selenium, β-carotene, and vitamin E administration on fertility of Awassi ewes synchronized in non-breeding season. A total of 80 multiparous Awassi ewes, aged 2 to 6 years were enrolled in the study. Intravaginal sponges containing flugeston acetate (20 mg cronolon) was inserted into vagina and allowed to remain in vagina for nine days. Ewes were randomly divided into two groups. Group I received intramuscular injections of 1 mg sodium selenite, 60 mg vitamin E, 75 mg β-carotene, and 100 mg DL-α-tocopherol acetate at sponge insertion, sponge removal, and 18 days after the introduction of ram. Group II remained as control group and received no treatment. On the removal of the sponges, 500 IU eCG and 0.075 mg D-cloprostenol were injected intramuscularly. Ram was introduced for 1 hr twice a day 24 hours after the sponge removal. Interval between sponge removal and estrus, estrus rates, conception rates, pregnancy rates, lambing rates...
Turkish Journal of Agriculture - Food Science and Technology
The purpose of this study was to determine the effects of selenium, vitamin E, vitamin A, and vitamin D3 treatments on reproductive parameters in Awassi sheep fed solely dry grass and grain stubble during the breeding season with estrus synchronization. Seventy-five sheep were implanted with intravaginal sponges containing 20 mg of flugestone acetate for 9 days for estrus synchronization. On the day the sponges were inserted, the first group received an intramuscular injection of a supplement containing 200,000 IU of vitamin A, 30,000 IU of vitamin D3, and 20 mg of vitamin E, as well as a supplement containing 1 mg of sodium selenite and 60 mg of vitamin E. The second group was the control group, with no supplementary vitamin injected. On the day of sponge removal, the sheep received intramuscular injections of 500 IU PMSG and 250 mcg cloprostenol sodium in both groups. The sheep in the first group were given a second injection of the supplement on the same day that contained 20 mg ...
1997
Forty Hampshire and 40 Suffolk ewes were allotted to one of four groups (VitA, VitE, VitA&E, Control) in a 2 x 2 factorial treatment arrangement to evaluate the effect of supplemental vitamin E (0 or 300 IU) and vitamin A (0 or 250,000 IU) on reproductive performance. Laparoscopy and ultrasonography were used to measure ovulation rate, embryonic loss, and fetal loss. Serum profiles of a-tocopherol (vitamin E) and retinol (vitamin A) also were monitored. There were no differences (P>.05) among treatment groups in any reproductive trait. Suffolk ewes exhibited a higher (P<.02) ovulation rate than Hampshire ewes, and yearling ewes incurred higher (P<.001) embryonic loss than other age groups, resulting in a lower (P<.001) litter size. Serum levels of a-tocopherol were higher (P<.05) for Hampshire than for Suffolk ewes and were lower (P<.001) in yearling ewes versus ewes two years of age and older. Serum levels of a-tocopherol declined (P<.01) throughout the study in VitA and Control ewes but remained unchanged in VitE and VitA&E ewes. Serum level of retinol remained unchanged in VitA ewes, whereas the level increased (P<.01) initially in VitE, VitA&E, and Control ewes before declining toward initial levels. Correlations were detected between ovulation rate and the change of pre-mating a-tocopherol serum level (r=-.29; P<.02), the change in pre-mating retinol serum level (r=-.50; P<.02) and the interval from vitamin A injection (r=-.60; P<.05). These data indicate significant influences of breed, age, and treatment on a-tocopherol and retinol serum levels in ewes and suggest that the timing of vitamin A administration may influence ovulation rate; however, vitamin supplementation, administered at random stages of the estrous cycle, was unable to alter flock reproductive performance.
MijatoviC, R., S. jotanoviC, M. vekiC, G. SaviC, M. PodZo and B. StanCiC, 2012. The influence of hormone-vitamin-mineral treatment on reproductive efficiency of Romanov ewes in deep off-season. Bulg. J. Agric. Sci., Aim of study was to investigate the influence of hormone-vitamin-mineral treatment on reproductive efficiency of Romanov breed ewes in deep off-season. Experimental and control group consisted of 35 ewes each. Housing conditions, diet, hormonal treatment and insemination were identical for both groups. The difference between the experimental and control group was in the vitamin-mineral treatment. Ewes were treated with progestagens (30 mg FGA), using intravaginal sponges for 12 days. On day of sponge removal, all ewes were treated with 500 IU eCG. On the day of first insemination, ewes were treated with 250 IU hCG. Insemination was performed twice with freshly diluted sperm. Experimental group had fertility of 77.14±7.09%, fecundity of 140.00±6.45% and prolificacy of 181.48±7.11%. In the control group values of these parameters were 67.65±8.02%, 114.71±5.35% and 169.57±7.88%, respectively. Only the difference in fecundity was statistically significant (p<0.01). There were no statistically significant differences (p<0.05) in litter size and viability of lambs in the first 24 hours of life. Using the described hormonal treatment, estrus can be successfully induced and synchronized in deep off-season. With applying additional vitamin-mineral treatment reproductive performances can be improved, compared to the hormonal treatment only.
1997
Forty-four Hampshire (H) and 41 Suffolk (S) ewes were allotted within breed to one of four treatment groups (VitA, VitE, VitAE, and Control) to evaluate the effect of supplemental vitamin E and A on reproductive performance of ewes mated on pasture or in drylot. Beginning two weeks before the mating period, ewes received 0 or 300 IU of vitamin E every 14 days and 0 or 250,000 IU of vitamin A every 28 days. Hampshire ewes remained on pasture during the mating period, whereas S ewes were moved to drylot. Treatment did not affect ovulation rate (OR), embryonic loss (EL), fetal loss (FL) or litter size (LS) of H ewes. Embryonic loss was higher (P<.05) in the H yearlings and two-year olds than in older ewes. Litter size was lower (P<.01) for H yearlings compared with other age groups. Suffolk ewes in the VitE group exhibited a lower (P<.01) OR than S ewes in other treatment groups, but no effect of treatment was observed for EL, FL, or LS. Although S yearling ewes did not differ from ewes of other age groups for OR and EL, they did produce fewer (P<.05) lambs. Analysis of serum samples revealed that H yearling ewes exhibited lower (P<.05) serum a-tocopherol levels than older H ewes. In addition, H ewes had a higher (P<.05) serum a-tocopherol level than S ewes at the beginning of study when they were managed as one group. Even though age and breed influenced certain reproductive parameters, results of this study indicate little effect of supplemental vitamin E and A on the overall reproductive efficiency of ewes mated on pasture or in drylot.
Effects of Vitamin E and Selenium on Fertility and Lamb Performance of Yankasa Sheep
Open Journal of Veterinary Medicine, 2018
Effects of vitamin E and Selenium administration on fertility and lamb performance of Yankasa sheep were evaluated. Thirty post pubertal ewes (1-1 1/2 years of age) and nine rams (2-2 1/2 years of age) were used for the study. The ewes were randomly assigned into 3 groups (n = 10). Animals in group 1 served as control and were administered 1 ml normal saline. Animals in group 2 were administered 90 mg Tocopherol acetate (Vitamin E), while group 3 received injection containing a combination of 100 mg tocopherol acetate and 1.97 mg sodium selenite. Two doses of the injections were administered 14 days apart (subcutaneously). Estrus was synchronized in the ewes using controlled internal drug release device (CIDR). Rams were used for estrus detection and mating starting 24 hours following withdrawal of CIDR. Ewes were allowed to carry the pregnancy to term. The results indicate higher (p < 0.05) estrus response (80.00, 100.00, 100.00), pregnancy rate (75.00, 100.00, 100.00) and lambing rate (66.6, 100.00, 100.00) in ewes following administration of vitamin E and a combination of vitamin E and selenium. Average daily weight gain of lambs was also significantly enhanced (p < 0.05) by treatment. It can be concluded that administration of Vitamin E alone and in combination with selenium resulted in improved reproductive performance on Yankasa sheep.
SOME BIOCHEMICAL STUDIES DURING ESTROUS CYCLE AND AFTER SYNCHRONIZATION IN BARKI EWES
A total number of 28 mature Barki ewes were divided into three groups according to the methods used for synchronization of estrous cycle with different drugs. Group I comprised 8 ewes received no drugs and served as control group. Group II included 10 ewes synchronized by 3 ml (15 mg) prostaglandin F2 injected i.m and repeated once after 9 days from the first injection.Group III comprised 10 ewes synchronized by application of intra vaginal sponge impregnated by 60 mg medroxy progesterone acetate for 13 days. Blood samples were taken from all groups during estrus and diestrus phases, twice a week during natural, synchronizing estrus and at the next one for ewes were not conceive. The results showed that, the percentage of conception rate were 75%, 30% and 87.5% in first estrus and 100%, 70% and 100% in the second one for group I, II and III, respectively. Ewes synchronized by PGF2 (group II) showed a significant decrease in serum globulins and total lipids concentrations whereas the value of serum copper level and serum ALT activity showed a significant increase during the follicular phase in comparison with control group. Meanwhile,during the luteal phase, serum glucose, total lipids, copper and progesterone concentrations showed a significant decrease. But serum total cholesterol level, ALT activity, calcium and potassium concentrations were significantly higher when compared with the control group (group I). In ewes synchronized by Veramix vaginal sponge (group III) the obtained results showed that, during follicular phase serum total protein and total globulin levels were significantly decreased but the concentrations of serum total lipids, total cholesterol, calcium and ALT activity showed a significant increase. Moreover, during luteal phase serum glucose and copper levels, AST and ALT activities showed a significant decrease in comparison with control group. However, Ewes synchronized by PGF2 showed low fertility at first estrus than second one. Also some blood parameters as glucose, total protein, total globulins, total lipids, calcium, sodium and progesterone concentrations showed a significant decrease, while serum AST and ALT activities showed a significant increase at first estrus than second one. The results indicated that, the use of vaginal sponge impregnated with medroxy progesterone acetate as an estrus synchronizing agent in ewes was effective and beneficial than the PGF2 injection in respect to conception rate.
Comparison of three nutraceuticals administered in targeted nutrition on the reproductive response of Pelibuey ewes synchronized with exogenous hormones in an ultra-short protocol (Atena Editora), 2023
The objective of this work was to evaluate the reproductive response in Pelibuey ewes comparing the oral administration of three nutraceuticals for five days; T1; 10 g of aminosilicate with minerals, T2; 6 g of a gluconeogenic (Lipofeed), T3; 10 g of organic minerals Se and Cr in inert yeast (Biotecap) and T4; 10 ml of drinking water. All ewes were synchronized using a 5-day protocol with reused CIDRS plus prostaglandin F2α and eCG. Statistical analysis was performed using the GLM procedure of SAS and nonparametric variables using a logistic regression test. The percentage of ewes showing estrus was not different between treatments with percentages between 80 and 90. Hours to estrus was lower (P<0.05) in T1, T2 and T3 with less dispersion with respect to the mean, compared to T4 which had a higher mean. The percentage of gestation was not different between treatments with values of 70 and 80. Prolificacy was higher in T2 and T3 with values of 1.75 and 1.87 (P<0.05) with respect to T1 and T4 with values of 1.4. Blood glucose concentration was not different in T1, T2 and T3 in which less variation was also observed with respect to the mean (P<0.05) with respect to T4. It is concluded that the administration of nutraceuticals in targeted nutrition can improve some reproductive variables in ewes in anestrus, synchronized with an ultra-short protocol with reused CID¨R.
American Journal of Animal and Veterinary Sciences, 2007
The objective of this experiment was to determine whether post-mating progesterone (P 4) supplement improves pregnancy and lambing rates in ewes bred during the seasonal anestrous period. In June, 39 synchronized to estrus Awassi ewes were allowed with four harnessed fertile rams immediately following CIDR-G device removal (day 0 and 0 hour). Five days following ram introduction, ewes were randomly assigned to four groups to be treated post-mating with intramuscular injections of 20 mg P 4 supplement once daily from day 5 to day 9 (P 4-D5-9), days 10 to 14 (P 4-D10-14), days 5 to 14 (P 4-D5-14) or did not receive P 4 supplement (control). Blood samples were collected from all ewes for P 4 analysis. Progesterone concentrations prior to CIDR-G insertion were basal and no differences in P 4 concentrations were found on days-12,-10 and between days 0 and 5 among groups. Progesterone concentrations between days 5 and 15 differed (p<0.001) significantly due to treatment effect. Maximum P 4 concentrations were reached on day 9 in group P 4-D5-9 and between days 11 and 15 in groups P 4-D10-14, P 4-D5-14, and control. Pregnancy was diagnosed based on day 19 P 4 levels and day 30 ultrasonic examination in 5/10, 6/10, 5/10, and 5/9 ewes in groups P 4-D5-9, P 4-D10-14, P 4-D5-14 and control, respectively. Pregnancy loss was detected by ultrasonography on day 45 in 3/6 and 3/5 ewes in P 4-D10-14, P 4-D5-14 groups only. Overall pregnancy (53.8%) and lambing (41%) rates were similar among groups and were not influenced by P 4 supplement. In conclusion, P 4 supplement administered intramuscularly between days 5 and 14 post-mating is not effective in improving pregnancy, embryonic survival and lambing rates in Awassi ewes pretreated out-of-season. Pregnancy loss which occurred only in P 4-D10-14 and P 4-D5-14 groups maybe attributed to factors including the sharp decrease in P 4 concentrations on day 15 and stress experienced during the period of maternal recognition of pregnancy process.