Relevant bibliographies by topics / Pig production / Dissertations / Theses
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Dissertations / Theses on the topic 'Pig production'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Lindén, Anna. "Biomonitoring of cadmium in pig production /." Uppsala : Dept. of Pharmacology and Toxicology, Swedish Univ. of Agricultural Sciences ([Institutionen för farmakologioch toxikologi], Sveriges lantbruksuniv.), 2002. http://projkat.slu.se/SafariDokument/222.htm.

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2

Nyström, Per-Erik. "Quantitative trait loci in pig production /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5712-2.pdf.

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3

Genever, Elizabeth. "The welfare consequences of intensive pig production." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614256.

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4

Fredriksson, Josefin. "Svensk grisproduktion : Går det att balansera djurvälfärd och ekonomi inom grisproduktion?" Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-90712.

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The aim of this study was to find out about the Swedish pig farmers strategies to keep up with the competition against the import of pork from Denmark and at the same time be able to satisfy the pigs need of acting out their natural behavior. This study is based on in-depth interviews with the company "MinFarm" and eight Swedish pork producers. The result of the study was several different strategies for the Swedish pork producers to maintain in the competition against the imported meat and farmers opinions about animal welfare. One of the pork producers pointed out that it is not possible to
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5

Campos, Labbé Mónica. "The economics of technologies in Swedish pig production /." Uppsala : Dept. of Economics, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/a436.pdf.

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6

Riart, Guillermo R. "Some aspects of outdoor pig production in Argentina." Thesis, University of Aberdeen, 2002. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=203750.

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The thesis presents work evaluating performance of an Argentinian outdoor pig production system based on later weaning, induction of lactational oestrus and rearing of growing and finishing pigs at pasture. In experiment 1 the effect of hut type (straw bale huts or conventional corrugated metal huts) and season (summer and winter), on the extent of, and factors affecting, pre-weaning piglet mortality, piglet growth, sow lactational feed intake and weight loss were evaluated. Straw bales huts had lower levels of piglet mortality than control huts from birth to weaning probably due to lower summ
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7

Lammers, Peter J. "Energy and nutrient cycling in pig production systems." [Ames, Iowa : Iowa State University], 2009.

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8

Shores, Ellen Marie. "Theca cell function in the pig." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297990.

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9

Urquhart, Rhona Elizabeth. "Studies on the regulation of energy intake and body composition of growing boars." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282340.

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10

Davies, Zoe Elena. "The welfare implications of outdoor porcine breeding systems." Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266796.

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11

Nadal, Roig Esteve. "Optimization models forimproving the decision-making in the pig production process under a Pig Supply Chain context." Doctoral thesis, Universitat de Lleida, 2019. http://hdl.handle.net/10803/669206.

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Aquesta tesi se centra en l’estructura de cadena de subministrament plantejada en el sector porcí on les petites empreses i els productors de porcs estan integrats verticalment, s'especialitzen i treballen junts sota el paraigua de grans empreses o cooperatives. Aquestes cadenes de suministrament tenen avantatges competitius. No obstant això, els gerents han de considerar els nous problemes inexistent fins ara. Per tant, aquesta tesi desenvolupa un conjunt de models de decisió basats en Optimització per ajudar en el procés de presa de en 1) Balancejar l'impacte de les emissions en el sistem
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12

Thanapongtharm, Weerapong. "Modelling the distribution of pig production and diseases in Thailand." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/222071.

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This thesis, entitled “Modelling the distribution of pig production and diseases in Thailand”, presents many aspects of pig production in Thailand including the characteristics of pig farming system, distribution of pig population and pig farms, spatio-temporal distribution and risk of most important diseases in pig at present, and the suitability area for pig farming. Spatial distribution and characteristics of pig farming in Thailand were studied using time-series pig population data to describe the trend of pig productions in relation to pig numbers, holder numbers, and number of pigs per h
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13

Weng, Ruey-Chee. "Factors influencing mother-young ineractions in intensive pig production systems." Thesis, University of Aberdeen, 2000. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=158509.

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14

Cott, A. M. "Anaerobically digested pig manure as a resource for crop production." Thesis, Bucks New University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371220.

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15

Leckie, Caroline McKenzie. "Protein involvement in prostaglandin production by the guinea-pig uterus." Thesis, University of Edinburgh, 1992. http://hdl.handle.net/1842/19920.

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10mM sodium fluoride inhibited the output of prostaglandin (PG)F<SUB>2α</SUB> from Day-7 guinea-pig endometrium and the outputs of PGF<SUB>2α</SUB> and PGE<SUB>2</SUB> from Day-15 guinea-pig endometrium during 24h of tissue culture. The incorporation of [<SUP>3</SUP>H]-leucine into cellular and secreted proteins by Day-15 guinea-pig endometrium in culture was inhibited by over 90% of sodium fluoride (10mM). Thus, as far as endometrial PG and protein synthesis are concerned, the effects of sodium fluoride are similar to those of other protein synthesis inhibitors and provide further evidence th
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16

Alarcón, Pablo López. "Optimizing post-weaning multi-systemic wasting syndrome control taking into account economics aspects and management of information in decision making by farmers." Thesis, Royal Veterinary College (University of London), 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.572446.

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17

Collineau, Lucie. "Quantify, Explain and Reduce Antimicrobial Usage in Pig Production in Europe." Thesis, Nantes, Ecole nationale vétérinaire, 2016. http://www.theses.fr/2016ONIR091F/document.

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La résistance aux antibiotiques est une menace sérieuse pour la santé publique en Europe, entrainant une augmentation des coûts de la santé, des échecs thérapeutiques, et de la mortalité (ECDC, 2011). Le développement de l'antibiorésistance est principalement lié à la consommation d'antibiotiques chez l'Homme et les animaux. Depuis le début des années 2000, les pays européens ont limité cette consommation et en 2006, l'UE a interdit l'utilisation d'antibiotiques comme promoteurs de croissance. Ceci a favorisé le développement de diverses alternatives à l'utilisation d'antibiotiques. L'objectif
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18

Pepperell, J. R. "Aspects of progesterone and prostaglandin production by porcine luteal cells in culture." Thesis, University of Strathclyde, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372111.

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19

Zakayo, Griffin A. "Evaluation of Leucaena leucocephala leaf meal as a protein source for growing-finishing pigs." Thesis, Curtin University, 1998. http://hdl.handle.net/20.500.11937/2298.

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A study was conducted to evaluate the use of Leucaena leucocephala leaf meal (LLM) as a protein supplement for pigs. In addition, an evaluation of detoxifying LLM, by sun-drying, water-soaking, or treating with ferrous sulphate (FeS04) solution was undertaken. The research involved two experiments; a growth study and a metabolic study. In the growth study sixteen, 12 weeks old Large White x Landrace pigs (average body weight 22.9 ± 2.12 kg) were fed four experimental rations; a commercial grain-based grower /finisher ration (control); or a ration containing 20% of either sun-dried LLM, water-s
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20

Dyble, David Leslie. "A model to predict pig growth based on Western Canadian production conditions." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29831.

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An integrated pig growth model specific to the dietary formulations, genetic quality and environmental conditions of western Canada has been developed. A computer program was designed to simulate growth of pigs between 20 kgs and 100 kgs live weight. A spreadsheet format -Lotus 123 - was used to allow programming steps to be understood by all users, including those who do not possess a high degree of programming skill. A linear programming system was also incorporated through the use of an algorithm - Optimal Solutions. A useful method of avoiding circular errors, through an initial predictio
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21

Schulze-Geisthövel, Sophia [Verfasser]. "System innovations promoting health management in pig production chains / Sophia Schulze-Geisthövel." Bonn : Universitäts- und Landesbibliothek Bonn, 2015. http://d-nb.info/1110014120/34.

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22

Klauke, Thorsten [Verfasser]. "Risk based approach towards more sustainability in European pig production / Thorsten Klauke." Bonn : Universitäts- und Landesbibliothek Bonn, 2013. http://d-nb.info/1043056726/34.

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23

Strömvall, Erika. "Methane Production through Anaerobic Digestion at Backyard Pig Farms in Pampanga, Philippines." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-37578.

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The Pampanga province is one of the largest pork-producing provinces in the Philippines. Half of the province's pigs are reared in so-called back-yard farms. At these farms, there are no regulations regarding manure management and because of this, large amounts of manure are dumped close to the stables. These actions lead to spontaneous emission of greenhouse gases, eutrophication of rivers and groundwater pollution. In addition, the spread of manure contributes to inadequate sanitation and increased risks of disease among the inhabitants of the province. LPG and wood are the most popular fuel
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24

Riley, Simon Christopher. "Studies on some factors controlling prostaglandin production by the guinea-pig uterus." Thesis, University of Edinburgh, 1988. http://hdl.handle.net/1842/19261.

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25

Klauke, Thorsten Norbert [Verfasser]. "Risk based approach towards more sustainability in European pig production / Thorsten Klauke." Bonn : Universitäts- und Landesbibliothek Bonn, 2013. http://nbn-resolving.de/urn:nbn:de:hbz:5n-31233.

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26

Tran, Sy Nam, Ngoc Dieu Hong Le, Van Thao Huynh, et al. "Enhancing biogas production by anaerobic codigestion of water hyacinth and pig manure." Technische Universität Dresden, 2016. https://tud.qucosa.de/id/qucosa%3A32617.

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The characteristics of anaerobic batch co-digestion of water hyacinth (WH) with pig manure (PM) under seven mixing ratio 100%WH; 80%WH : 20%PM; 60%WH : 40%PM; 50%WH : 50%PM; 40%WH : 60%PM; 20%WH : 80%PM and 100%PM were investigated, each treatment was conducted in five replications with daily loading rate at 1 gVS.L-1.day-1. During the anaerobic digestion process of 60 days, maximum biogas production occurred in two periods, the first stage from 12- 22 days and second stage from 30 - 35 days. The maximum daily biogas productions from each stage were 17.2 L.day-1 and 15.1 L.day-1, respectively.
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27

Pinto, Cortes Julio Alejandro. "Hazard analysis on farm and at national level to maintain classical swine fever disease free status in Chile." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314326.

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28

Yang, Quan. "Modulation of endothelin production and metabolism in guinea-pig cultured tracheal epithelial cells." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ26624.pdf.

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29

Wichelhaus, Daniel Peter. "Control of inositol polyphosphate production in pregnant and non pregnant guinea pig uterus." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333176.

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30

Bölke, Kristofer. "IRONARC; a New Method for Energy Efficient Production of Iron Using Plasma Generators." Thesis, KTH, Materialvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173357.

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The most widely used process to reduce iron ore and to produce pig iron is the blast furnace. The blast furnace is a large source of CO2 emissions since it is a coal based process and due to that the main energy source and reducing agent is coke, it is difficult to reduce these further. IRONARC is a new method used to produce pig iron by reducing iron ore and all the energy used for heating comes from electricity, which gives the opportunity to use renewable resources. The process uses plasma generators that inject gas at high temperature and velocity into a slag that consists of iron oxides.
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31

Hjort, Anders, and Simon Norin. "An Interdisciplinary Study on Farm Based Biogas Production in Southern Brazil." Thesis, Halmstad University, School of Business and Engineering (SET), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-1803.

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<p>Today the use of anaerobic digestion technique emerges as an alternative to the conventional treatment method of pig slurry to the pig producers in Brazil because of the energy demanding intensive pig production and the negative environmental impact that arises during storage and use. The end products of AD technique are biogas as an energy source and digestate that can be used as a fertilizer.</p><p>The study took place at two pig producers in southern Brazil in order to evaluate the biogas production in the area, its applications and environmental impact. The visited pig producers run a c
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32

HA, Ngowi HA, IK Phiri, S. Afonso, et al. "Taenia solium cysticercosis in Eastern and Southern Africa: an emerging problem in agriculture and public health." Bachelor's thesis, SOUTHEAST ASIAN J TROP MED PUBLIC HEALTH, 2004. http://hdl.handle.net/10174/13978.

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Pig production has increased tremendously in Eastern and Southern Africa (ESA), particularly in smallholder rural communities. The increase in pig production has mainly been due to land scarcity, increase in pork consumption in many areas including urban centers, and the recognition by many communities of the fast and greater return of the pig industry, compared with other domesticated livestock industries. Concurrent with the increase in smallholder pig keeping and pork consumption, there have been increasing reports of Taenia solium cysticercosis in pigs and humans in the ESA region, althoug
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33

Zakayo, Griffin A. "Evaluation of Leucaena leucocephala leaf meal as a protein source for growing-finishing pigs." Curtin University of Technology, Muresk Institute of Agriculture, 1998. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=13519.

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A study was conducted to evaluate the use of Leucaena leucocephala leaf meal (LLM) as a protein supplement for pigs. In addition, an evaluation of detoxifying LLM, by sun-drying, water-soaking, or treating with ferrous sulphate (FeS04) solution was undertaken. The research involved two experiments; a growth study and a metabolic study. In the growth study sixteen, 12 weeks old Large White x Landrace pigs (average body weight 22.9 ± 2.12 kg) were fed four experimental rations; a commercial grain-based grower /finisher ration (control); or a ration containing 20% of either sun-dried LLM, water-s
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34

Hancox, Laura Ruth. "Non-antibiotic methods of reducing enteric disease and improving production in the young pig." Thesis, University of Nottingham, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.718991.

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Correct management of gut health in the young pig is essential for a lifetime of good health and growth. With rising concerns over anti-microbial resistance, it is likely that antibiotic use will become limited in pig farming. Other methods of disease control must be implemented. The aim of this project was to investigate the effect of the yeast probiotic Saccharomyces cerevisiae var. boulardii CNCM 1-1079 (SB) on enteric health and production, and to demonstrate the effect of a cleaning and disinfection regime, particularly focusing on use of detergent, on microbial load in livestock housing.
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35

Olea, Perez Rafael. "Analysis of sustainability in the pig production chain : life cycle assessment of contrasting scenarios." Thesis, University of Newcastle Upon Tyne, 2010. http://hdl.handle.net/10443/998.

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This research investigated the environmental impact of the pig production chain by modelling contrasting scenarios. Life Cycle Analysis (LCA) and scenario analysis methodologies were used to reveal the main opportunities to improve sustainability. Pig production systems were modelled in two countries (The UK and Mexico), each with a standard production system and on alternative system. This gave four scenarios which were different in the degree of integration that exist between pig and crop production and were then specified in detail to allow for comparison of environmental impact. This study
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36

Evans, Charlotte Marie. "The impact of respiratory disease on production in the pig industry in Great Britain." Thesis, University of Warwick, 2010. http://wrap.warwick.ac.uk/3692/.

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37

Green, David Brian. "Electrophysiological studies of the production and cortical representation of vocalisations in the guinea pig." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/14340/.

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Vocal production: Guinea pigs (GP) are gregarious animals with a well-characterised repertoire of 11 vocalisations. These are context dependent, communicating information about danger, identity and emotional state. Vocalisations have previously been produced by electrical stimulation of three areas in the GP brain: anterior cingulate, hypothalamus and periaqueductal grey. These vocalisations were reported as natural-sounding, but with little or no spectral analysis to support this assertion. I elicited calls from urethane-anaesthetised GP by stimulating all the above areas, and from the amygda
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38

Depauw, Joël. "Étude expérimentale de sources à décharge magnétisée (type PIG) pour la production d'ions multichargés." Paris 11, 1986. http://www.theses.fr/1986PA112386.

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39

Conant, Abram. "Capital's Chinese Pigpen: Political Ecologies of Pig Production in the People's Republic of China." Thesis, University of Oregon, 2016. http://hdl.handle.net/1794/19695.

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This thesis analyzes contemporary political ecologies of pig farming in the People's Republic of China, as well as emergent discourses of “meatification” and the industrialization of Chinese agriculture more broadly. Situated within these extensive, heterogenous, and dynamic assemblages, which I contextualize in historical-geographical terms throughout Chapter I, I narrow my argument to three relatively neglected problematics that occupy subsequent chapters: the role of pigs in the affective construction of modernity, the microbiological zones of insecurity intertwined with industrial pig prod
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40

Schiavo, Giuseppina <1986&gt. "Analysis of the pig genome for the identification of genomic regions affecting production traits." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6919/1/Schiavo_Giuseppina_Tesi_Dottorato_XVII_ciclo.pdf.

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The aim of this work was to identify markers associated with production traits in the pig genome using different approaches. We focused the attention on Italian Large White pig breed using Genome Wide Association Studies (GWAS) and applying a selective genotyping approach to increase the power of the analyses. Furthermore, we searched the pig genome using Next Generation Sequencing (NSG) Ion Torrent Technology to combine selective genotyping approach and deep sequencing for SNP discovery. Other two studies were carried on with a different approach. Allele frequency changes for SNPs affecting
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41

Schiavo, Giuseppina <1986&gt. "Analysis of the pig genome for the identification of genomic regions affecting production traits." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6919/.

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The aim of this work was to identify markers associated with production traits in the pig genome using different approaches. We focused the attention on Italian Large White pig breed using Genome Wide Association Studies (GWAS) and applying a selective genotyping approach to increase the power of the analyses. Furthermore, we searched the pig genome using Next Generation Sequencing (NSG) Ion Torrent Technology to combine selective genotyping approach and deep sequencing for SNP discovery. Other two studies were carried on with a different approach. Allele frequency changes for SNPs affecting
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42

au, mtrezona@agric wa gov, and Megan Trezona-Murray. "Conventional and Deep-litter Pig Production Systems: The effects on fat deposition and distribution in growing female Large White x Landrace Pigs." Murdoch University, 2008. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20080418.105619.

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Minimising variability in carcass quality to better meet market specifications is a priority for Australian pig producers, however issues with variability in carcass fat distribution have recently been raised, particularly in the belly primal. There has been a rapid increase in the use of low-cost, deep-litter (DL) housing systems in Australia over the past 15 years for rearing pigs. The inherent differences between the physical, thermal, and social environments of conventional (C) and DL production systems may well alter the growth path of the pig and subsequently alter fat metabolism and hen
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43

周厚華 and Donna Chaw. "Biochemical changes in the fermentation bedding of the "pig-on-litter"method of pig farming: with special emphasison biodegradation of nitrogen compounds and odour production." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B43893740.

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44

Murray, Megan Trezona. "Conventional and deep-litter pig production systems : the effects on fat deposition and distribution in growing female large white X landrace pigs /." Access via Murdoch University Digital Theses Project, 2008. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20080418.105619.

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45

Trezona-Murray, Megan. "Conventional and deep-litter pig production systems: the effects on fat deposition and distribution in growing female large white X landrace pigs." Thesis, Trezona-Murray, Megan (2008) Conventional and deep-litter pig production systems: the effects on fat deposition and distribution in growing female large white X landrace pigs. PhD thesis, Murdoch University, 2008. https://researchrepository.murdoch.edu.au/id/eprint/443/.

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Minimising variability in carcass quality to better meet market specifications is a priority for Australian pig producers, however issues with variability in carcass fat distribution have recently been raised, particularly in the belly primal. There has been a rapid increase in the use of low-cost, deep-litter (DL) housing systems in Australia over the past 15 years for rearing pigs. The inherent differences between the physical, thermal, and social environments of conventional (C) and DL production systems may well alter the growth path of the pig and subsequently alter fat metabolism and hen
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46

Trezona-Murray, Megan. "Conventional and deep-litter pig production systems: the effects on fat deposition and distribution in growing female large white X landrace pigs." Trezona-Murray, Megan (2008) Conventional and deep-litter pig production systems: the effects on fat deposition and distribution in growing female large white X landrace pigs. PhD thesis, Murdoch University, 2008. http://researchrepository.murdoch.edu.au/443/.

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Minimising variability in carcass quality to better meet market specifications is a priority for Australian pig producers, however issues with variability in carcass fat distribution have recently been raised, particularly in the belly primal. There has been a rapid increase in the use of low-cost, deep-litter (DL) housing systems in Australia over the past 15 years for rearing pigs. The inherent differences between the physical, thermal, and social environments of conventional (C) and DL production systems may well alter the growth path of the pig and subsequently alter fat metabolism and hen
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47

Trejo, Lizama Wilbert. "Strategies to improve the use of limited nutrient resources in pig production in the tropics." Kassel : Kassel Univ. Press, 2005. http://deposit.d-nb.de/cgi-bin/dokserv?idn=982035101.

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48

Ryu, Junghyun. "The direct injection of CRISPR/Cas9 system into porcine zygotes for genetically modified pig production." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/101763.

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The pig has similar features to the human in aspects such as physiology, immunology, and organ size. Because of these similarities, genetically modified pigs have been generated for xenotransplantation. Also, when using the pig as a model for human diseases (e.g. cystic fibrosis transmembrane conductance regulator), the pig exhibited similar symptoms to those that human patients present. The main goal of this work was to examine the efficacy of direct injection of the CRISPR/Cas9 system (clustered regularly interspaced short palindromic repeats/ CRISPR associated protein 9) in pigs and to over
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49

Chaw, Donna. "Biochemical changes in the fermentation bedding of the "pig-on-litter" method of pig farming : with special emphasis on biodegradation of nitrogen compounds and odour production /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17592240.

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50

Ferrer, Riera Pablo. "Valorisation of Mediterranean agroindustrial by-products in pig production as feed and anaerobic co-digestion of slurry." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/171747.

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Tesis por compendio<br>[ES] Actualmente, la sostenibilidad del sector porcino depende de su capacidad para responder a la elevada demanda de productos ganaderos derivada del crecimiento de la población, adaptándose a los cambios en los contextos económico y político, y mejorando su rendimiento medioambiental mediante la mitigación de su impacto ambiental. En este contexto, el uso de subproductos agroindustriales ofrece materias primas alternativas en producción animal, con una menor carga ambiental asociada, en forma de piensos para el ganado, fuente de compuestos bioactivos o materias primas
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