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The reproductive performance of cows of high and low body weight lines was evaluated in 1992-97. In the 2 lines respectively, the interval from calving to ovulation averaged 28 and 31 days (P<0.05). In cows older than 2 years, the CRs to 1st insemination were 58.8 and 70.0% respectively..
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The objectives of this trial were to determine the effects of 0.5 mg estradiol benzoate administered intramuscularly 24 h after the removal of progesterone-containing intravaginal devices on the occurrence and timing of estrus, synchronized pregnancy rate and synchronized conception rate in dairy he...
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AIM: To examine the effect of intramuscular barium selenate on the blood selenium concentration of horses with marginal selenium status. METHODS: Eighteen mares were assigned to one of six groups. The mares in groups 1-4 received barium selenate at 0.5, 0.75, 1.0 and 1.5 mg Se/kg, respectively, inje...
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The effect of supplementation with selenium and/or iodine on growth rate, mohair production and plasma concentrations of thyroid hormones in goats was studied. Male Angora goats, 3-4 months old, were treated with 0 or 1 intraruminal Se pellet, or treated intramuscularly with iodized oil at 0, 200 or...
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A single preoperative dose of antibiotic proved as effective as a preoperative and 7-day postoperative course in reducing complications following rumenotomy in cattle. Exploratory rumenotomy was performed on 29 healthy Angus steers, which were allotted to the following treatment groups: (1) no antib...
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Pregnant Thoroughbred mares (n=21) were grazed on tall fescue pasture containing Cu 4.4-8.6 mg/kg DM. Twelve mares were supplemented daily with Cu 0.5 mg/kg liveweight (LW) as copper sulphate for the final 13-25 weeks of gestation. Plasma Cu declined during the third trimester for all mares and was ...
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24 Friesian heifers were fed winter diets consisting either of hay with or without selenium supplementation, or pasture and silage with or without selenium supplementation. Heifers fed hay diet (α-tocopherol concentration 19 mg/kg of dry matter) resulted in a pre-calving serum α-tocopherol concent...
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The effects of selenium and iodine supplementation on growth rate and on thyroid and somatotropic function were examined in heifer calves from 2 herds at pasture. Supplementation of calves with intraruminal Se pellets (designed to release Se about 3 mg/day) increased the basal plasma concentration o...
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We aimed to describe the management and productivity of this group of smallholder dairy farmers in Kenya at the beginning of an intervention program and to document relevant observed changes in the 3rd year of the intervention. A 3-year intervention program, focused on management of animal health an...
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The purpose of this study was to compare the efficacy of a recommended protocol of oral melengestrol acetate (MGA) to intravaginal medroxyprogesterone acetate (MPA), with or without equine chorionic gonadotropin (eCG), for out-of-season breeding of sheep on Prince Edward Island. One hundred and twen...