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Rozprawy doktorskie na temat „Ewes Nutrition”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 28 stycznia 2023

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1

Nottle, Mark Brenton. "Short-term nutrition and its effect on ovulation in the ewe." Title page, table of contents and summary only, 1988. http://web4.library.adelaide.edu.au/theses/09PH/09phn921.pdf.

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2

Partington, Elizabeth Claire. "Influence of nutrition on parasitism in periparturient dairy ewes." Thesis, Open University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.418468.

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3

Kiyma, Zekeriya. "Effects of feed restriction and dietary oil supplementation on reproduction in sheep." Laramie, Wyo. : University of Wyoming, 2005. http://proquest.umi.com/pqdweb?did=888862061&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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4

Kleemann, D. O. "A study of factors affecting embryonic, fetal and lamb survival in high fecundity merino ewes." Title page, table of contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phk638.pdf.

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Bibliography : leaves 120-133. Defines the sources of reproductive wastage in FecB FecÊ Booroola Merino x South Australian Merino ewes and examines factors associated with the survival of embryos, fetuses and lambs with the aim of improving net reproduction efficiency. Experiments were conducted to define the problem; to examine factors affecting embryonic and fetal loss; and, to investigate factors influencing wastage at lambing.

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Janse, van Rensburg Ariena. "The effect of different protein supplements on the production economics and nematode resilience of merino ewes." Pretoria : [s.n.], 2002. http://upetd.up.ac.za/thesis/available/etd-05272008-140021/.

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6

Kakar, Muhammad Azam. "Effect of peri-conceptional feed intake on early embryo development and fetal growth in the Merino ewe /." Title page, table of contents and abstract only, 2003. http://web4.library.adelaide.edu.au/theses/09ANP/09anpk138.pdf.

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7

Viñoles, Gil Carolina. "Effect of nutrition on follicle development and ovulation rate in the ewe /." Uppsala : Dept. of Clinical Chemistry, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/v165.pdf.

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8

Handford, David. "The effect of dietary protein source on the metabolism and performance of ewes in late pregnancy and early lactation." Thesis, Open University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369033.

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9

Daly, Fiona Frances Margaret. "The effect of diet on the nutrition and production of merino ewes in the arid shrublands of Western Australia." Thesis, Curtin University, 2009. http://hdl.handle.net/20.500.11937/570.

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For the Arid Shrublands of Western Australia (WA) knowledge is limited on what sheep eat and how nutritious their diets are. A study was undertaken on two stations near Yalgoo (28º18’S 116º38’E) in WA, from November 2005 to December 2007. Station 1 (28º39’S 116º18’E) used a flexible rotational grazing management system (RGS), moving 3000-4000 Merino sheep every 3 – 6 weeks through a choice of 20 paddocks. Station 2 (28º18’S 116º42’E) used a flexible continuous grazing management system where small mobs (500 sheep) stayed in paddocks all year, until shearing. Two paddocks on Station 2 were chos

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10

Black, Heather Jayne. "Effects of shearing and its interaction with plane of nutrition on the performance of housed pregnant ewes and fattening lambs." Thesis, Queen's University Belfast, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335345.

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11

Annett, R. W. "Studies on the effects of the nutrition of ewes during pregnancy on neonatal lamb survival and lamb output at weaning." Thesis, Queen's University Belfast, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411764.

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12

Coleman, Danielle Nicole. "The effects of supplementing EPA and DHA during late gestation on ewes and lambs." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1498824557998868.

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13

Carvalho, Marina Hojaij. "Modificação da cascata e taxa lipolítica do tecido adiposo de ovelhas lactantes tratadas com somatotropina bovina." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/11/11139/tde-10092003-143653/.

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Foram utilizadas 24 ovelhas da raça Santa Inês para coleta de tecido adiposo, sendo 16 lactantes e 8 secas. Oito ovelhas lactantes foram tratadas in vivo com bST (160 mg, em duas doses em intervalo de 14 dias) iniciando a injeção subcutânea de hormônio no 13 o dia de lactação, sendo que os animais restantes receberam somente vitamina E. Outros 8 animais encontravam-se em período seco, para que fosse verificada também a diferença das taxas lipolíticas em diferentes estados fisiológicos. Foi verificada a hipótese de que ocorra uma atuação da ST através de mudança na resposta do sistema an

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14

Lippert, M. "Aspects of feeding the hill ewe during pregnancy." Thesis, University of Edinburgh, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354201.

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15

MunÌƒoz, Camila. "Studies on the effects of nutritional status of ewes during early and mid pregnancy on reproduction and subsequent offspring performance." Thesis, Queen's University Belfast, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486164.

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A research programme was undertaken over t\vo years with the aim of increasing understanding on the effect of nutrition on ewe reproductive performance and subsequent offspring performance. The objectives of the programme were to examine the effects of plane of nutrition in early pregnancy, plane of nutrition in mid pregnancy, selenium supplementation in early and mid pregnancy and selenium supplementation throughout the productive season, on ewe and offspring performance. Performance was evaluated through a series of parameters such as fertility, prolificacy, health, embryo development, foeta

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16

McMullen, Sarah. "Nutritional and endocrinological regulation of fetal and placental growth in the ewe." Thesis, Royal Veterinary College (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406095.

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17

Shariff, Mohammed Azamatulla. "Kinetics of selenium metabolism in the ewe and fetal lamb." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/27528.

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To investigate the whole body metabolism of selenium (Se), isotope kinetic studies were undertaken in which indwelling catheters were implanted in the jugular veins of pregnant and nonpregnant ewes as well as the inferior vena cava and saphenous veins of 110-120 day (d) old ovine fetuses. A single injection of ⁷⁵Se-sodium selenite was administered and blood samples were obtained at various times. A 5 d Se balance trial, which commenced on the day of tracer experiment, was also undertaken. The plasma ⁷⁵Se specific activity data were used for determining the kinetic parameters of Se met

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18

Redden, Roy Reid. "Effects of ewe late gestational supplementation of rumen undegradable protein, vitamin E, zinc, and chlortetracycline on ewe productivity and postweaning management of lambs on feedlot performance and tissue deposition." Thesis, Montana State University, 2009. http://etd.lib.montana.edu/etd/2009/redden/ReddenR0809.pdf.

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Lamb survival and productivity from birth to weaning and lamb postweaning management harvest are areas that the US sheep industry needs to become more efficient at to remain profitable. Western white-faced ewes were supplemented HIGH (12.5% rumen by-pass protein, 880 IU/kg of supplemental Vitamin E, 176 ppm chelated Zn, and 72.7 mg/kg chlortetracycline) or LOW (7.56% rumen by-pass protein, with no supplemental Vitamin E, chelated Zn, or chlortetracycline) supplements at 0.227 kgâ€¢ewe -1â€¢d -1 during late gestation. Ewes of different age and body condition scores were i

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19

Madibela, Othusitse Ricky. "Protein nutrition of livestock grazing high quality pasture." Lincoln University, 2010. http://hdl.handle.net/10182/1571.

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This thesis describes a series of four experiments designed to evaluate the role of the supply of protein in livestock grazing high quality pasture during mating and during pregnancy. The first two studies investigated the effects of high crude protein content of spring or autumn re-growth pasture on the reproductive performance of dairy cows and of ewes at mating. The last two studies investigated how the dietary supply of protein, body condition and their interactions contribute to the breakdown of immunity during the peri-parturient period in ewes and investigated underlying endocrine mecha

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20

Mehaba, Nabil. "Heat stress effects and nutritional alleviation strategies in small ruminants." Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/670657.

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En esta tesis, se estudiaron los efectos del estrés por calor (EC) sobre la producción de ovejas lecheras Lacaune (Exp.1), así como la respuesta de cabras lecheras Murciano-Granadina bajo condiciones de EC a la L-carnitina (Exp. 2) y la metionina (Exp. 3). En los 3 Exp., los animales fueron alimentados con una ración única mezclada y se ordeñaron x2 al día. Las condiciones ambientales fueron: termo-neutralidad (TN; THI = 59-65) y EC (día, THI = 83; noche, THI = 75). El fotoperíodo (día-noche) fue constante (12-12 h). La temperatura rectal (TR), el ritmo respiratorio (RR), la IMS, el consumo de

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21

Wigzell, Susan. "Physiological and nutritional factors affecting oestrous activity and pregnancy in the ewe, with emphasis on the role of melatonin." Thesis, University of Aberdeen, 1989. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU022758.

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In seven experiments carried out under natural-daylength conditions at 57oN, Scottish Blackface and Border Leicester x Scottish Blackface ewes of varying physiological states and nutritional regimes received daily at 1500 h an oral dose of either melatonin dissolved in water and alcohol or the vehicle alone. Throughout the experiments blood samples were collected thrice weekly for progesterone, prolactin and follicle stimulating hormone concentrations (FSH) and at 10 to 15 minute intervals for periods of up to 24 h for luteinizing hormone (LH). Ovulation rates were determined by laparoscopy. W

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22

Linden, Danitsja Stephanie van der. "Ewe size and nutrition during pregnancy : effects on metabolic and productive performance of the offspring : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Animal Science at Massey University, Turitea, Palmerston North, New Zealand." Massey University, 2010. http://hdl.handle.net/10179/1343.

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Exposure of the fetus to adverse conditions in utero may result in developmental adaptations that alter metabolism and postnatal growth of the offspring. This thesis investigated the effects of dam size and nutrition during pregnancy on growth, metabolic function and lactational and productive performance of the female offspring to two years of age. Four-hundred and fifty heavy (60.8 kg ± 0.18) and 450 light (42.5 kg ± 0.17) dams were randomly allocated to ad libitum or maintenance nutritional regimens from days 21 - 140 of pregnancy, under pastoral grazing conditions. From one week prior to l

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23

West, Kathryn S. "Effects of differential ewe body condition at mating and early post-mating nutrition on embryo survival." Thesis, 1990. http://hdl.handle.net/1957/37674.

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Two trials were conducted over consecutive years to examine the effects of ewe body condition and post-mating nutrition on ovulation rates and embryo survival. Trial 1 used 146 Polypay ewes ranging in age from 5 to 8 years in a 3 x 2 factorial array of pre-mating (high-H, low flushed-LF and low unflushed-L) and post-mating nutrition (high and low) treatments. Trial 2 was a 2 x 2 x 2 factorial array of 60 Polypay and 60 Coopworth x Polypay (C x P) three year old ewes, two pre-mating (H and LF) and two post-mating (high and low) treatments. To estimate timing and extent of embryo loss, two metho

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24

Nottle, Mark Brenton. "Short-term nutrition and its effect on ovulation in the ewe / by Mark Brenton Nottle." Thesis, 1988. http://hdl.handle.net/2440/19113.

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Includes bibliographical references (leaves 143-165)<br>xiii, 168 leaves : ill. (some col.) ; 30 cm.<br>Reports on studies undertaken to examine the physiological basis of the known ability of lupin grain to increase ovulation rate in the ewe.<br>Thesis (Ph.D.)--University of Adelaide, Dept. of Animal Sciences, Waite Agricultural Research Institute, 1989

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25

Corner, Rene Anne. "Exposure of ewes to stressors in mid- and late- pregnancy : postnatal effects on the ewe and lamb : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Animal Science at Massey University, Palmerston North, New Zealand." 2007. http://hdl.handle.net/10179/763.

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This thesis set out to examine the effect of maternal undernutrition and exposure to stressors between pregnancy day 50 to 100 and 100 to 147 of pregnancy on the ewe and her lamb. The long-term effects of these stressors during pregnancy on lamb growth, plasma cortisol response to a stressor, metabolism, behaviour and future reproductive success were examined. Mid-pregnancy shearing The component of mid-pregnancy shearing that causes the increase in lamb birth weight is unknown. It was hypothesised that the increase in lamb birth weight was due to the stress response of the ewe to shearing. Th

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26

McWilliam, Eileen Lee Hafner. "The effect of poplar (Populus spp.) and willow (Salix spp.) supplementation on the reproductive performance of ewes grazing low quality drought pasture during mating : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Animal Science in the Institute of Veterinary Animal and Biomedical Science, Massey University." 2004. http://hdl.handle.net/10179/1741.

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A series of grazing experiments was conducted, in the summer/autumn of 2001, 2002 and 2003, to investigate the effects of poplar (Populus spp.) and/or willow (Salix spp.) supplementation, during mating, on ewe production and reproduction when grazing drought pasture. Each experiment involved a rotational grazing system with 300 mixed-age Romney ewes, divided into three groups of 100 ewes each. In each year, all ewes were offered low quality simulated drought pasture, containing more than 60% dead matter, at an allowance sufficient to provide a potential desired intake of 0.70 kg dry matter (DM

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27

"Nutritive value of coastcross hay-based diets supplemented with urea or amiréia upon the performance of ewes of the Santa Ines breed." Tese, BIBLIOTECA CENTRAL DA UFLA, 2006. http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=397.

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28

Jorge, Sara Alexandra Pinto. "Efeito da suplementação com Lupinus albus no período pré-cobrição sobre o estado nutricional e a taxa de concepção de ovelhas Merino Branco em condição corporal estável ou crescente." Master's thesis, 2009. http://hdl.handle.net/10400.5/1655.

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Mestrado em Engenharia Zootécnica - Produção Animal - Instituto Superior de Agronomia<br>Nutrition plays an important role in reproduction and is very used in the reproductive manipulation of farm animals. The lupin seed (Lupinus spp.), a grain legume with high energy and protein content, has been extensively used as a supplement to improve the reproductive efficiency of sheep. In this work it was studied the effect of Lupinus albus supplementation of Merino Branco ewes on some metabolic blood metabolites (non esterified fatty acids, glucose, urea and albumin) in order to assess the nutr

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