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Rozprawy doktorskie na temat „Merino sheep Animal nutrition”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 28 stycznia 2023

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1

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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Visagie, Willem. "The digestibility and degradability of feeds and protein sources in Dohne merino sheep and boer goats." Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5303.

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Thesis (MScAgric (Animal Sciences))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: The objective of this study was to evaluate Dohne Merino sheep and Boer goats in terms of the degradable parameters of a high-fibre diet, a low-fibre diet and two vegetable protein sources commonly used in South Africa. Differences between species were evaluated following the potential differences within species. The feedstuffs used were those for the following diets: low-fibre diet (LF); high-fibre diet (HF); sunflower meal (SFM) oilcake; and soybean meal (SBM) oilcake. In the first trial, the dig

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3

Tahmasebi-Sarvestani, Abdolghafar. "Innervation of the temporomandibular joint : an experimental animal model using Australian merino sheep /." Title page, abstract and contents only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09pht1284.pdf.

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4

Ribeiro, Mafalda Maria dos Santos Vidal. "Caracterização produtiva e reprodutiva do rebanho de raça Merino Branco da Fundação Eugénio D'Almeida." Master's thesis, ISA/UTL, 2012. http://hdl.handle.net/10400.5/5296.

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Van, der Westhuizen E. J. "The effect of slaughter age on the lamb characteristics of Merino, South African Mutton Merino and Dorper lambs." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4331.

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Thesis (MScAgric (Animal Sciences))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: The aim of this study was to investigate the effect of feedlot production on the growth and carcass characteristics, as well as the distribution of the main tissues (muscle, fat and bone) and meat quality of Merino, South African Mutton Merino (SAMM) and Dorper lambs. The Merino and SAMM 2008 outperformed (P<0.05) the 2007 SAMM and both Dorper production groups in terms of average daily gain, while the Merino and both SAMM production groups achieved the best feed conversion ratio (P<0.05). The high

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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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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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8

Sheridan, Rouxlene. "A comparative analysis of nutrient utilisation and meat quality parameters of boer goats and South African mutton merinos." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52060.

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Thesis (MScAgric)--University of Stellenbosch, 2001.<br>ENGLISH ABSTRACT: One of the reasons why meat supply does not meet human demand is that man has concentrated on utilising relatively few animal species as a source of meat. Development of unconventional livestock, such as goats, is advocated as a means of increasing global meat production and consumption. Although South Africa possesses large numbers of domestic ruminants, meat consumption has been limited mainly to sheep and cattle. Goats are used to a lesser extent. This is partly attributed to a general belief that goat meat is i

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9

Archer, Zoe Anne. "Neuroendocrine control of appetite and reproduction in sheep." Thesis, University of Aberdeen, 2001. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU602029.

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Reproductive neuroendocrine activity and appetite are modulated at the hypothalamus by both nutritional status and photoperiod in the seasonal animal. The objectives of this work were (1) to measure circulating hormones and/or metabolites that relay information about peripheral nutritional status to the hypothalamus, (2) to identify which hypothalamic neuropeptides and receptors that are responsive to photoperiodic and nutritional feedback and (3) to establish which changes in peripheral signals and/or hypothalamic neuropeptides are associated with alterations in the activity of the reproducti

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10

Brundyn, Laetitia. "The utilization and supplementation to stubble lands for South African mutton Merino ewes." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53186.

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Thesis (MScAgric)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: An experiment was conducted to determine the effect of the frequency of supplementary feeding on the production of South African Mutton Merino (SAMM) ewes grazing wheat stubble. One hundred and sixty ewes were randomly divided into two groups that consisted of four groups each. Eight camps were grazed for 138 days during which lambing occurred. Four groups of 25 ewes each grazed a 17 ha camp at a stocking density of 5.8 ewes/ha and four groups of 15 ewes each grazed a 12 ha camp at a stocking density of 5.0 ewes/ha

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11

Nolte, Joubert van Eeden. "Essential amino acid requirements for growth in woolled sheep." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/1666.

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Thesis (PhD(Agric) (Animal Sciences))--University of Stellenbosch, 2006.<br>This project consisted of five studies. The objectives were to determine the essential amino acid (AA) requirements of growing woolled lambs (Merino and Dohne Merino) and the essential AA profile of duodenal digesta pre-dominantly derived from microbial protein. The limiting essential AA`s in high rumen degradable protein (RDP) diets to growing lambs, where microbial protein is the primary source of AA`s, were also identified. The first study determined the essential AA profile of duodenal protein on a high rumen

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12

Wiradarya, Tantan Rustandi. "Performance of hair, wool and hair x wool sheep fed different levels of dietary protein and reared in two different locations /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487259125217809.

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13

Jacobson, Caroline. "Scouring and dag in sheep in Western Australia: the role of parasitic nematodes and nutritional factors in diarrhoea in sheep of post-weaning age." Thesis, Jacobson, Caroline ORCID: 0000-0001-9427-1941 (2006) Scouring and dag in sheep in Western Australia: the role of parasitic nematodes and nutritional factors in diarrhoea in sheep of post-weaning age. PhD thesis, Murdoch University, 2006. https://researchrepository.murdoch.edu.au/id/eprint/700/.

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Diarrhoea ("scouring") in sheep increases the risk of faecal soiling of the breech ("dag") that in turn causes significant production losses for sheep producers and increases susceptibility of sheep to breech blowfly strike. The common causes of scouring in sheep of post-weaning age in Western Australia have not been well described. In a written questionnaire sent to sheep producers in the south west of Western Australia, about half of the respondents reported lamb, hogget and ewe flocks with moderate or severe dag. Flocks with moderate or severe dag were reported more commonly in the wint

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14

Jacobson, Caroline. "Scouring and dag in sheep in Western Australia : the role of parasitic nematodes and nutritional factors in diarrhoea in sheep of post-weaning age /." Jacobson, Caroline (2006) Scouring and dag in sheep in Western Australia: the role of parasitic nematodes and nutritional factors in diarrhoea in sheep of post-weaning age. PhD thesis, Murdoch University, 2006. http://researchrepository.murdoch.edu.au/700/.

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Diarrhoea ("scouring") in sheep increases the risk of faecal soiling of the breech ("dag") that in turn causes significant production losses for sheep producers and increases susceptibility of sheep to breech blowfly strike. The common causes of scouring in sheep of post-weaning age in Western Australia have not been well described. In a written questionnaire sent to sheep producers in the south west of Western Australia, about half of the respondents reported lamb, hogget and ewe flocks with moderate or severe dag. Flocks with moderate or severe dag were reported more commonly in the winte

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15

Linsky, Anta. "Evaluation of the small ruminant nutrition system model using growth data of South African mutton merino and dorper lambs." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/41022.

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The aim of this study was to evaluate the Small Ruminant Nutrition System (SRNS) model’s performance predictions for lambs under South African conditions using growth and body composition data of early- (Dorper) and late-maturing (South African Mutton Merino), indigenous sheep breeds. The Cornell Net Carbohydrate and Protein System (CNCPS) biological model has consistently been modified to include recent information. This has led to the development of the SRNS model, but up to now the SRNS model has only been validated with European sheep breeds under European conditions. Thirty two Dor

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16

Lusweti, Francesca N. "Rumen undegradable protein in growing sheep diets /." free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9842596.

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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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18

Sprinkle, Jim, Rob Grumbles, and Art Meen. "Nutritional Characteristics of Arizona Browse." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2002. http://hdl.handle.net/10150/144710.

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11 pp.<br>This publication contains information about browse utilization by ruminant animals. It provides information about the rangelands in Arizona, the nutritional quality of browse, effects of drought and tannin and how to overcome them.

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19

Sibbald, Angela M. "The effect of body condition and previous nutrition on voluntary intake and feeding behaviour in sheep." Thesis, University of Aberdeen, 1996. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU090361.

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There is evidence from a number of species that body condition or fatness plays a role in the regulation of energy balance, through a direct effect on voluntary food intake (VFI). However, since differences in body condition are frequently confounded with differences in previous nutrition, this study investigated the role of both factors in the control of VFI in sheep. In ewes grazing autumn pastures, there was a negative effect of body condition on VFI, but no independent effect of the previous level of nutrition. However, there was an interaction between the effects of body condition and her

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20

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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21

Cafe, Linda Maree. "The growth and compositional response of the hindlimb of the sheep to amino acid infusion /." St. Lucia, Qld, 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17258.pdf.

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Robinson, Julie A. "The effects of dietary molybdenum and sulfur on serum copper concentrations, growth and reproductive function in lambs." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/31319.

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Feeds often contain molybdenum (Mo) and sulfur (S) in excess of recommended allowances for adequate copper (Cu) absorption by ruminant livestock. Two randomized-block experiments were conducted using lambs given a cereal-based diet (90% of dry matter (DM) intake), containing 8 mg Cu, 0.7 mg Mo and 2.1g S per kg DM, that was either unsupplemented or supplemented with ammonium molybdate or sodium sulfate alone or in combination, to determine the effects of Mo, S and Mo+S on growth, hematology, serum Cu and Mo concentrations and reproductive function. Short term intake (4 weeks) by rams, aged 18

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23

Bruns, Nicholas Joseph. "Humoral and cell-mediated immunity in vitamin A-deficient lambs." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/53919.

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Antigen-specific and polyclonal serum immunoglobulin G (IgG) concentrations were measured in control (Con), vitamin A-deficient (A-def), and vitamin A-repleted (A-rep) lambs. In Trial, I ewe lambs were injected with primary and secondary antigenic challenges of ovalbumin (1mg) and lysozyme (.1mg). The A-def lambs were then repleted with vitamin A and all lambs were injected with primary and secondary antigenic challenges of human gamma globulin (HGG) (.1mg). In Trial II Con and A-def wether lambs were given primary and secondary antigenic challenges of ovalbumin (20μg). Half of the A-def lambs

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Laporte, Uribe José Alberto. "Studies of magnesium metabolism in ruminants : a comparison of sheep and cattle." Lincoln University, 2005. http://hdl.handle.net/10182/2078.

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Transactions of magnesium (Mg) along the gastrointestinal tract and the effect of change in potassium (K) intake were recorded in two in vivo experiments in sheep and cattle. Additional information on the sensitivity to K intake was obtained by comparing Mg transport and electrochemical properties of isolated rumen epithelia of sheep and cattle in 4 additional in vitro experiments. The experiment described in Chapter 2, and performed in sheep housed indoors in metabolic crates, investigated the compensatory capacity of the intestine to respond to the reduction in Mg absorption from the stomac

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Owens, Jacob Michael. "Influence of Supplemental Legumes that Contain Tannins and Saponins on Intake and Diet Digestibility in Sheep Fed Grasses that Contain Alkaloids." DigitalCommons@USU, 2008. https://digitalcommons.usu.edu/etd/174.

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My objectives were to determine if nutritional benefits occur when animals are offered foods with compounds -- alkaloids, saponins, and tannins - that are potentially complementary. I hypothesized that food intake and digestibility increase when lambs consume plants such as alfalfa ALF that contain saponins or birdsfoot trefoil (BFT) that contain tannins when the basal diet is endophyte-infected tall fescue (TF) or reed canarygrass (RCG) both of which contain alkaloids. I predicted that the nutritional status of lambs would be enhanced if basal diets of alkaloid-containing grasses were supple

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Gore, Mitchell Taylor. "Invitro protein synthesis and degradation and cathepsin D activity in the muscles of selenium-vitamin E deficient sheep." Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/45729.

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Invitro synthesis and degradation capabilities and the cathepsin D activity of the skeletal muscles of experimentally induced Selenium-Vitamin E deficient lambs were investigated. Twenty-one Dorset x Coopworth x Suffolk lambs were blocked by weight and assigned to one of the following treatments: 1) a basal diet of 85% whole shelled corn and 15% mixed grass hay plus a mineral supplement that was low in Se and E (-Se-E), 2) the basal diet and deficient mineral mixture as fed in treatment 1 with the addition of a casein encapsulated fat supplement (-Se-E+fat), 3) the basal diet plus a mineral mi

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Holele, Kabelo Kgomotsego Odirile. "Effect of TDS content of water on the selenium status and certain growth parameters of mutton sheep." Diss., Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-07312007-155215.

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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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Oliveira, Rangel dos Santos. "Composição corporal e exigências nutricionais de cordeiros Santa Inês." Pós-Graduação em Zootecnia, 2014. https://ri.ufs.br/handle/riufs/6362.

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There is little information on nutrient requirements for sheep raised in Brazil, so it is important to have more research in this area because a large number of publications is necessary for developing a table of Brazilian nutritional requirements for sheep. Thus, the present investigation was carried out to determine the body composition and protein and energy requirement for Santa Ines lambs. The experiment was conducted in the Department of Animal Science, Federal University of Sergipe. Twenty four no castrated Santa Ines lambs with an average age of three months and average live weight of

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Santana, Neto José Adelson. "Uso da manipueira como suplemento na dieta para cordeiros Santa Inês." Pós-Graduação em Zootecnia, 2013. https://ri.ufs.br/handle/riufs/6380.

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Sheep farming in northeastern Brazil is characterized as a sideline subsistence, requiring technologies that provide better productivity of these animals. In this aspect, called alternative food may to some extent improve the nutrition and animal nutrition. Thus the cassava, a liquid product resulting from the pressing of manioc, may be included in the diet of small ruminants as a food energy. Therefore the objective of this study was to evaluate the effect of adding different levels of cassava in the diet of sheep on consumption, performance, carcass characteristics of lambs Santa Inês feedlo

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Cooke, Judith A. "Utilization of phosphorus and other minerals from broiler litter and swine waste." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/64667.

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Two metabolism trials were conducted with 15 wethers surgically equipped with duodenal and ileal cannulas to study the absorption of P and certain other minerals from swine waste and broiler litter. The effect of source and level of P on rumen cellulytic bacterial populations was also determined. Animals were fed a low P basal diet until serum inorganic P averaged 5.5 mg/dl, then randomly assigned to the following diets: low P basal alone, or supplemented with swine waste, broiler litter, dicalcium phosphate, or soybean meal. Trials consisted of a 7-d preliminary period, a 7-d collection of ur

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Michailoff, Andressa Alaine. "Óleos funcionais a base de mamona e de casca de castanha de caju na dieta de ovinos." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2797.

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CAPES<br>Objetivou-se avaliar o efeito da inclusão de diferentes níveis de óleos funcionais extraídos da mamona (Ricinus communis L.) e da casca da castanha do caju (Anacardium occidentale L.) sobre consumo e digestibilidade de nutrientes, parâmetros ruminais e síntese de proteína microbiana em ovinos. Foram utilizados quatro ovinos machos, castrados, sem raça definida, fistulados no rúmen, com peso vivo médio de 49,1 kg em um delineamento experimental quadrado latino 4 x 4, sendo os tratamentos a inclusão de 2, 4 e 6 g/animal/dia de óleos funcionais e o tratamento testemunha sem a inclusão do

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Gruner, Tini Maria. "Studies of vitamin B₁₂ metabolism in sheep." Lincoln University, 2001. http://hdl.handle.net/10182/2098.

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Vitamin B₁₂ deficiency has been difficult to diagnose, mainly due to the vitamin's lack of biological significance in serum in which it is usually assayed. This research has investigated the marker of vitamin B₁₂/cobalt (Co) deficiency in sheep, methylmalonic acid (MMA), in comparison with serum and liver vitamin B₁₂ concentrations in farm situations where vitamin B₁₂ deficiency is expected in order to establish more accurate reference ranges for serum and liver vitamin B₁₂, and MMA. In addition, an attempt was made to ascertain the vitamin B₁₂ requirements of preruminant (PR) lambs, and

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Kirk, David J. "Effects of feeding lasalocid and monensin upon mineral status of steers, and partial absorption and renal handling of minerals in sheep." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54218.

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Studies were conducted to determine the effects of feeding lasalocid and monensin upon mineral status of ruminants, changes in digestive and renal physiology which bring about altered mineral status, and the effects of dietary K upon the actions of ionophores. Two 84-d grazing trials were conducted with steers fed no ionophore, 200 mg lasalocid, or 150 mg monensin. Monensin tended to increase gain of steers, but lasalocid had no effect. Feeding supplemental lasalocid and monensin altered Ca, P, Mg, Na, K, Cu, Fe and Zn status of grazing steers, but effects were not consistent. Twenty-four cr

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Branchini, Naiana da Silva [UNESP]. "Estudo da influência alimentar na etiologia da urolitíase em cordeiros." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/123282.

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Made available in DSpace on 2015-05-14T16:53:16Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-07-25Bitstream added on 2015-05-14T16:59:05Z : No. of bitstreams: 1 000822488.pdf: 555089 bytes, checksum: 501faf5eaaa5eb0843ecbccf93308491 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>A ovinocultura é uma atividade em crescimento no plano pecuário brasileiro e é desenvolvida de maneiras diversas (extensiva, semi intensiva, intensiva). Nas criações, tem sido observada a incidência de urolitíase. Devido a este fato, o estudo de aspectos relacionados à gênese, pre

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Branchini, Naiana da Silva. "Estudo da influência alimentar na etiologia da urolitíase em cordeiros /." Botucatu, 2014. http://hdl.handle.net/11449/123282.

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Orientador: Roberto Calderon Gonçalves<br>Coorientador: Danilo Otávio Laurenti Ferreira<br>Banca: Simone Biagio Chiacchio<br>Banca: Ivan Roque de Barros Filho<br>Resumo: A ovinocultura é uma atividade em crescimento no plano pecuário brasileiro e é desenvolvida de maneiras diversas (extensiva, semi intensiva, intensiva). Nas criações, tem sido observada a incidência de urolitíase. Devido a este fato, o estudo de aspectos relacionados à gênese, prevenção, diagnóstico e tratamento torna-se necessário e atual. Incorporada ao aparecimento da urolitíase, a alimentação é um dos fatores predisponente

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Simionatto, Marcio. "Gordura protegida de óleo de palma na dieta para ovinos." Universidade Tecnológica Federal do Paraná, 2016. http://repositorio.utfpr.edu.br/jspui/handle/1/2421.

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CAPES; Fundação Araucária<br>Foi avaliado os efeitos da inclusão de gordura protegida na dieta em ovinos em relação ao consumo, digestibilidade, balanço de nitrogênio, pH ruminal, nitrogênio amoniacal (N-NH3) e açúcares totais (CHO). O experimento foi realizado na Unidade de Ensino e Pesquisa de Metabolismo Animal, da Universidade Tecnológica Federal do Paraná, Câmpus Dois Vizinhos, no período de julho a setembro de 2014. Teve duração de 90 dias, sendo 10 dias de adaptação ao ambiente, com 4 períodos experimentais de 20 dias, sendo 15 para adaptação a dieta e 5 dias para as coletas de fezes, s

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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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Mayberry, Dianne. "Getting into the guts of a salty problem : poor animal production from saltbush pastures is due to inefficient rumen fermentation." University of Western Australia. School of Animal Biology, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0071.

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The main hypothesis tested in this thesis was that poor animal production from saltbush pastures is due to the negative effects of high sodium chloride (NaCl) and potassium chloride (KCl) on the ruminal environment, and subsequent effects on microbial populations and products of rumen fermentation. This main hypothesis was tested in two experiments. In the first experiment (Chapter Four) the effects of saltbush and a formulated high-salt diet on the ruminal environment and microbial populations were measured over 24-hours following feeding. Feeding both the saltbush and high-salt diet increase

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Horn, João Alfredo. "Desempenho reprodutivo de ovelhas Texel suplementadas no pré-encarneiramento." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/77931.

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Tradicionalmente no Rio Grande do Sul a ovinocultura mantinha um foco na produção de lã, onde os índices reprodutivos do rebanho possuíam pouca importância. Atualmente isso tem mudado devido à alta valorização do cordeiro no mercado. Nos sistemas com foco na produção de cordeiros os índices reprodutivos tornam-se chaves para a economicidade da propriedade. Mas, para que isso ocorra de uma maneira sustentável a eficiência reprodutiva dos rebanhos precisa alcançar melhores índices. O aumento na prolificidade através da manipulação da nutrição é um dos fatores que podem contribuir para melhorar e

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Santos, Guilherme Batista dos. "Utilização de gordura protegida de óleo de palma na alimentação de ovelhas em gestação e lactação." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2501.

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CAPES<br>O experimento foi realizado na Universidade Tecnológica Federal do Paraná no período de abril a junho de 2015 tendo como objetivo avaliar o efeito da gordura protegida de óleo de palma na gestação e lactação de ovelhas e comportamento materno filial. Foram utilizadas 40 ovelhas mestiças Santa Inês e Dorper acasaladas com um carneiro da raça Dorper e 42 cordeiros. Foram fornecidos dois concentrados, com e sem gordura protegida de óleo de palma, os quais as ovelhas foram suplementadas a 1,0% do peso vivo corporal com base na matéria-seca. A cada 15 dias, foram realizadas pesagem e aval

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Criscioni, Ferreira Patricia Fabiola. "Application of an open circuit indirect calorimetry system for gaseous exchange measurements in small ruminant nutrition." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/64069.

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[EN] The main objective of this Thesis was to study the energy metabolism in small ruminants under different nutrition sceneries. As methodology we utilized indirect calorimetry instead of direct calorimetry or feeding trials. Within indirect calorimetry we worked with a portable open circuit gas exchange system with a head hood. This open circuit respiration system permitted completed the whole energy balance and evaluate the efficiency of utilization of the energy of the diet for different physiological circumstances as milk production in dairy goats or maintenance in sheep. Besides, we coul

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LIMA, JÚNIOR Dorgival Morais de. "Subproduto do urucum na alimentação de ovinos de corte." Universidade Federal Rural de Pernambuco, 2012. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6756.

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Submitted by (edna.saturno@ufrpe.br) on 2017-04-11T15:24:47Z No. of bitstreams: 1 Dorgival Morais de Lima Junior.pdf: 691741 bytes, checksum: e3cc4341b81ffb63a55535be967ae230 (MD5)<br>Made available in DSpace on 2017-04-11T15:24:47Z (GMT). No. of bitstreams: 1 Dorgival Morais de Lima Junior.pdf: 691741 bytes, checksum: e3cc4341b81ffb63a55535be967ae230 (MD5) Previous issue date: 2012-10-16<br>This study aimed to evaluate the intake, digestibility, performance, carcass characteristics, meat quality and components not constituents carcass of sheep fed increasing levels (0, 100, 200 and 300 g/

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Le, Roux Marize. "Specialized creep feeding for lambs to optimize performance." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17974.

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Thesis (MScAgric)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: The following study is to determine if a creep feed balanced for limiting essential amino acids (EAA) at a certain non structural carbohydrate (NSC) level will elicit greater responses than lambs reared on a commercial creep feed. Lysine, Threonine, Methionine, Isoleucine, Phenylalanine and Leucine were determined as the limiting amino acids for nursing lambs. These amino acids were incorporated into the creep feed treatments CF1 and CF2 representing 157 g CP/kg, 477 g NSC/kg and 179 g CP/kg, 508 g NSC/kg, respectivel

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Jurgens, Andre Hendrik. "Feedlot performance and essential amino acid growth requirements of Dorper lambs." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52846.

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Thesis (MScAgric)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: The Dorper is numerically the second most abundent of all the sheep breeds in South Africa. It is the most numerous sheep breed in the dry arid areas of South Africa which make out a very big portion of the natural grazing in South Africa. In this study the feedlot performance was specifically investigated since so little research has been done in this regard. In the first study (Chapter 1), the production efficiency, body components and commercial yield of 13 Dorper and 12 Merino lambs were investigated. A pellet

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Ludemann, M. R. "Development of an experimental approach to measure vitamin B12 production and absorption in sheep." Lincoln University, 2009. http://hdl.handle.net/10182/1424.

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Clinical diagnosis of vitamin B12/cobalt (Co) deficiency is difficult due to the unspecific nature of the clinical symptoms. The apparent increase in vitamin B12 deficiency in New Zealand in the late 1990’s made it clear that health providers were very reliant on plasma reference ranges to diagnose deficiency. However, the lack of quantitative data of what these reference ranges represent in terms of supply of vitamin B12, has prevented a better understanding of the metabolism of vitamin B12 within sheep. This thesis describes the development of an experimental approach to measure vitamin B12

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Carvalho, Camila Thiara Gomes. "Perfil metabólico e desempenho produtivo de ovelhas Santa Inês suplementadas com ionóforo durante o período de transição." Pós-Graduação em Zootecnia, 2013. https://ri.ufs.br/handle/riufs/6402.

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The experiment was conducted from August 2011 to May 2012 in the Sheep Sector, Federal University of Sergipe. Aimed to study the effects of the transition period on dry matter intake, milk production, body condition score, body weight and metabolic profile, characterizing the transition period in Santa Ines sheep. We used 10 ewes, nullíparas, pregnant. The animals were confined to 30 days before expected farrowing until 60 days after delivery. To study the variables CMS, CMS (% BW), weight, BCS and metabolic profile were analyzed in three periods: Period 1: animals of 21 days pre-partum until

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Prado, Tayrone Freitas. "Metionina protegida, lisina protegida, enzima amilolítica e lisofosfolipídeos em dieta de alto concentrado para cordeiros confinados." Universidade Federal de Goiás, 2013. http://repositorio.bc.ufg.br/tede/handle/tede/5396.

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Submitted by Marlene Santos (marlene.bc.ufg@gmail.com) on 2016-03-29T17:45:50Z No. of bitstreams: 2 Dissertação - Tayrone Freitas Prado - 2013.pdf: 757178 bytes, checksum: d6b50701d112877be8caf02e9e4712b0 (MD5) license_rdf: 19874 bytes, checksum: 38cb62ef53e6f513db2fb7e337df6485 (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-04-04T10:31:09Z (GMT) No. of bitstreams: 2 Dissertação - Tayrone Freitas Prado - 2013.pdf: 757178 bytes, checksum: d6b50701d112877be8caf02e9e4712b0 (MD5) license_rdf: 19874 bytes, checksum: 38cb62ef53e6f513db2fb7e337df6485 (MD5)<b

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Lin, Xiaoxiao. "Evaluation of Kahne rumen sensors in fistulated sheep and cattle under contrasting feeding conditions : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Agriculture at Massey University, Palmerston North, New Zealand." Massey University, 2009. http://hdl.handle.net/10179/1313.

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The Kahne rumen sensor (bolus) is a device developed to measure temperature, pressure and pH in non-fistulated animals. This bolus allows real-time monitoring of the rumen environment, which could help preventing health problems such as rumen acidosis in cows. It is less invasive to use boluses compared to other technologies that measure the ruminal pH (e.g. rumenocentesis). Kahne boluses and transceivers are commercially available in the market. Several studies on the relationships between data recorded by the bolus and actual data recorded by independent devices were conducted. The bolus tem

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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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