Global ETD Search
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 109 for “"Ewe"”.
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Topics in Ewe syntax
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Linguistics and Philosophy, 1993.
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Seasonal plasticity of A15 dopaminergic neurons in the ewe
In the ewe, anestrus is caused by increased sensitivity to E2 negative feedback that is mediated by A15 dopaminergic neurons that are only responsive to E2 in anestrus. Experiment 1, tested the hypothesis that synaptic input on A15 neurons varies with season by examining synapsin-positive close …
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Lamb wastage and its association with ewe body condition
The effect of ewe body condition and live weight, and change in these factors, on lamb wastage was examined in a composite (principally Coopworth) flock of small- or large-framed ewes. Approximately equal sized flocks of small- and large-framed ewes, balanced for age and condition were selected …
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The neuroendocrine mechanism of reproductive photorefractoriness in the ewe
… ovariectomized estradiol-treated (OVX + E$\sb2$) ewes were subjected to 3 different photoperiodic regimens which resulted in reproductive quiescent: (1) exposure to long days (16L:8D), which caused photosuppression (LDPS); (2) prolonged exposure to short days (10L:14D); which caused …
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Ovarian sensitivity of the prepubertal ewe to exogenous gonadotropins
Ovulatory response of prepubertal ewe lambs of Booroola Merino x Rambouillet (F+) and Rambouillet (++) breeding was compared after administration of 500 IU PMSG, 750 IU hCG, a combination of PMSG and hCG (500 IU PMSG followed by 250 IU hCG), 4, 8, 20, 30 or 40 mg of ovine pituitary extract or 12 mg …
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Appetite Regulatory Neural Circuitry in the Prenatal Testosterone Treated and Obese Ewe
… then asked whether this circuitry is altered in ewes at increased risk of obesity following prenatal testosterone (T) treatment, or in diet-induced obese ewes. Using immunocytochemistry, we found that prenatal T-treated ewes showed increased expression of the appetite stimulatory peptide, AgRP, …
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Genetic relationship between ewe longevity and structural foot and leg traits in sheep
To view the abstract, please see the full text of the document.
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Evidence for a systemic embryotoxic effect of early luteal regression in the ewe
… a short-lived corpus luteum was embryotoxic in ewes given supplemental progesterone and the route of transfer of embryotoxic products. Mated ewes were lutectomized or sham lutectomized on day 4 after estrus. Following surgery, ewes received saline or PGF 2alpha through days 6 or 7. Pregnancy …
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Effect of Short-Term Estrogen Depletion on Compact Bone Microdensitometry in the Ewe
… operatively. This study specifically looks at ewe sacrificed at 3 months. The radius from each sheep was cut into the anatomical sectors: cranial, caudal, craniolateral, craniomedial, caudomedial, and caudolateral. Each anatomical sector was turned into a microradiograph for analysis. …
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Contribution of the Ovary to Maintenance of Pregnancy in the Gilt and Ewe
Made available in DSpace on 2014-12-10T22:30:22Z (GMT). No. of bitstreams: 1 7206920.pdf: 2838569 bytes, checksum: 96b212bbc51e93fad315c49e41580228 (MD5) Previous issue date: 1971
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Photoperiodism in the ewe: Endogenous circannual rhythms and olfactory mechanisms influencing reproductive activity
… responses. The majority of gonadal-intact ewes maintained for more than three years under two different constant photoperiod and restricted temperature conditions failed to express a circannual rhythm of breeding and non-breeding activity but expressed a clear circannual rhythm of prolactin …
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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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The Effects of Artificial Photoperiod on Age at Puberty in Fall-born Ewe Lambs
… artificial photoperiod on puberty in fall-born ewe lambs. Replicate I was initiated in December 2011 with prepubertal Dorset ewe lambs (n = 44). Replicate II was initiated beginning in December 2012 and included prepubertal Dorset, Suffolk x Dorset and Texel x Dorset ewe lambs (n = 52). All …
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Home away from home: a study of the Ewe unification in the United States
… to identity the reasons and causes for strong Ewe identity among those in the contemporary African Diaspora in the United States. An important debate among African nationalists and academics argues that ethnic belonging is a response to colonialism instigated by Western-educated African elites …
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Genetic evaluation of ewe productivity and its component traits in Katahdin and Polypay sheep
… were to evaluate genetic influences on ewe productivity, its growth and reproductive components, and measures indicative of accelerated lambing performance. Genetic parameters were estimated for total weight of litter weaned per ewe lambing (TW) and its components, number of lambs born …
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Breed group effects on pregnancy rate and ewe performance in different seasons of the year
… Finn x Dorset (FD) and 35 grade Rambouillet (R) ewes were exposed to rams in various seasons. Ewes were born in 1979 or 1980; no R ewes were born in 1980. Ewes were bred in April, 1980 (APR80); November, 1980 (NOV80); August, 1981 (AUG81); May, 1982 (MAY82); and April, 1983 (APR83). Ewes born in …
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Bacteriology of the reproductive tract of the peri parturient ewe and its relationship with fertility
… in a commercial sheep flock of 400 mule ewes. Vulval discharges were found to be physiological (Type 1), occuring immediatly after normal parturition and consisted of clear red coloured mucus which was frequently sufficiently profuse to drip from the vulva and stain the inside of the …
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An economic evaluation of the optimal ewe replacement policy for typical Canterbury light land and irrigated properties
Every year in New Zealand large numbers of ewes which are suitable for another full year of production are killed at the freezing works. This is the result of the breeding ewe's productive life being traditionally determined by the state of its incisor teeth. The basis for this culling policy is …
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