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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 145 for “"Ewes"”.
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Immunophysiology of the uterus in cyclic ewes
… to infections. The experiments conducted with ewes for this dissertation aimed to 1) Investigate the hormonal regulation of uterine immune responses to infections during different stages of the estrous cycle (Exp. 1), and 2) Investigate the ability of uterine proteins, collected during …
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Occurrence, etiology and management of ringwomb in ewes
Pedigrees of ewes with Ringwomb were studied to determine the etiology, incidence and treatment of Ringwomb. Purebred Suffolk and crossbred Hampshire and Shropshire ewes aged from one to seven years were observed over a period of five lambing seasons. The study was conducted on 24 clinical cases of …
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Studies of Reproductive Cycles and Fertility in Ewes
Made available in DSpace on 2014-12-05T17:47:29Z (GMT). No. of bitstreams: 1 0015289.pdf: 6509057 bytes, checksum: ed3fba8d7db0890c262c3f417349dbce (MD5) Previous issue date: 1955
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Energy and protein nutrition of ewes in late pregnancy
… rate but for efficient use the condition of the ewes as well as total composition of the diet has to be considered thoroughly. In the experiment described here the effect of feeding different concentrates during the last month prepartum on ewe and lambs health and performance were tested on 48 …
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Reproductive performance of dorset ewes in the star accelerated lambing system
Reproductive performance of Dorset ewes in the Cornell University STAR accelerated lambing program was evaluated. This program consists of five 30-d concurrent breeding and lambing periods per year beginning on January 1 (Sl), March 15 (S2), May 27 (S3), August 8 (S4) and October 20 (S5). …
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Effects of Lipopolysaccharide Induced Inflammatory Response on Early Embryo Survival in Ewes
Early pregnant ewes, 5 or 6 day post coitus (dpc) were used as a model to study early embryonic loss via gram-negative bacterial infections, such as mastitis. Ewes 5/6 dpc were injected with a gram-negative bacteria cell wall component, lipopolysaccharide (LPS) or tumor necrosis factor-alpha …
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ELUCIDATING DIFFERENT CLOSTRIDIUM PERFRINGENS TYPE D VACCINE PROTOCOLS IN EWES AND LAMBS
… responses. Three trials were conducted in ewes and lambs, using a multivalent clostridial vaccine (Glanvac® 6, Zoetis Canada Inc., Kirkland, QC, Canada). In ewes, booster vaccinations were performed as follows: in trials 1 and 3, ewes were boosted 42-or-14 days (42d or 14d) pre-lambing; in …
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An analysis of lambing ewes three times in two years in Southland
… literature there is suggests that lambing ewes three times in two years (ie. a sustained 8 monthly lambing interval) is possible. It does however require the seasonal breeding nature of the ewe to be altered either by cross-breeding, selection, use of the 'ram effect', exogenous hormones or …
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Effects of Levels of Luteinizing Hormone and Pinealectomy on the Seasonalbreeding of Ewes
Made available in DSpace on 2014-12-09T14:29:06Z (GMT). No. of bitstreams: 1 7013460.pdf: 2282354 bytes, checksum: d02d5239a5fbe5e562d6ac5675fd64cc (MD5) Previous issue date: 1969
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Induction of fertile estrus during seasonal anestrus in ewes and fall born ewe lambs
… concentrations of P4 to that observed in cycling ewes during the luteal phase. Percentage of ewes in estrus was greater in P4 treated than in control ewes. Estrous response was greater after treatment with P4 for 5 than for 12 d. Progesterone increased the percentage of ewes lambing to both …
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Ovarian and Pituitary Responses of Seasonally and Postpartum Anestrous Ewes to Gonadotropin Releasing Hormone
In the first experiment, seasonally anestrous ewes were treated with saline or gonadotropin releasing hormone (GnRH) either intramuscularly in saline, subcutaneously in carboxymethylcellulose or subcutaneously in a gelatin capsule. Ewes were bled for progesterone determination prior to treatment …
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Budget analysis of quarter-Finn and Western ewes in spring- and fall-lambing systems
… 71 mature ¼ - Finn (Suffolk x Finn-Rambouillet) ewes were bred to Suffolk-Hampshire rams to lamb in either spring (March) or fall (September). Effects of ewe breed type and lambing season on ewe fertility (ewes lambing/ewes exposed), prolificacy (lambs born/ewe lambing) and lambing date, and on …
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Characterization of seasonal reproduction in Virginia Tech Selection Line, St. Croix, and Suffolk ewes
… were conducted to investigate the ability of ewes to rebreed while lactating during seasonal anestrus. Breeds studied included the Virginia Tech Out-of-season (OOS) Line, which is a wool line genetically selected to lamb in the fall, and the St. Croix, a hair breed of tropical origin thought …
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Prostaglandins Modulate the Uterine Response to Infectious Bacteria in Postpartum and Estrous Cyclic Ewes
… with uterine infections. In Exp. 1, postpartum ewes (d 0 = parturition) were supplemented with either OIL or P4 (beginning on d 10) or were SHAM or OVEX. Vena caval blood and lymphocytes were collected on d 14, and 16 to 19. All ewes received intrauterine inoculations of bacteria on d 15 and …
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Melengestrol acetate and norgestomet for the induction of synchronized estrus in seasonally anovular ewes
… to induce synchronized estrus in anovulatory ewes. Seasonally anestrous ewes (n=232; determined by blood serum progesterone concentration) of mixed breeding were randomly assigned within broad age groups to one of seven treatments: 1) control (C); 2) MGA only (OMGA); 3) MGA + zeranol (RMGA); …
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Analysis of the effects of sire and age on wool quality traits in Romney ewes
… wool breeding trial being conducted with Romney ewes in North Canterbury, New Zealand. Wool trait data collected from the first generation progeny was analysed. The trial aims to increase the value of Romney wool by improving its quality. Key wool traits which affect processing performance and …
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