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Dissertations / Theses on the topic 'Birch litter'

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1

Wittenburg, Dörte [Verfasser]. "Statistical modelling of birth weight variability within litter in pigs / Dörte Wittenburg." Greifswald : Universitätsbibliothek Greifswald, 2008. http://d-nb.info/1044250720/34.

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2

AULCHENKO, YU S., S. I. ODA, M. B. ROGATCHEVA, and P. M. BORODIN. "Inheritance of litter size at birth in the house musk shrew (Suncus murinus, Insectivora, Soricidae)." Cambridge University Press, 1998. http://hdl.handle.net/2237/10262.

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3

Ramsden, Katy. "Litter size and maternal metyrapone effects on birth size, growth and insulin sensitivity in neonatal guinea pigs /." Adelaide, 2000. http://web4.library.adelaide.edu.au/theses/09S.B/09s.br178.pdf.

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4

Bergstrom, Jonathan Robert. "Effects of birth weight, finishing feeder design, and dietary astaxanthin and ractopamine HCl on the growth, carcass, and pork quality characteristics of pigs; and meta-analyses to improve the prediction of pork fat quality." Diss., Kansas State University, 2011. http://hdl.handle.net/2097/9218.

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Doctor of Philosophy<br>Department of Animal Sciences and Industry<br>Jim L. Nelssen<br>Eleven-thousand one-hundred eighty-five pigs were used in 11 experiments to determine effects of birth-weight, feeder design, and dietary astaxanthin (AX) and ractopamine HCl (RAC) on growth, carcass, and pork quality characteristics of pigs. Also, data from 27 experiments were used in meta-analyses to improve prediction of pork fat iodine value (IV). In Exp. 1, increased birth-weight resulted in greater (quadratic, P < 0.05) pre-weaning survivability, ADG, final BW, and likelihood of achieving full-value m
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5

Almeida, Mirian de. "Efeito do peso ao nascer e do tamanho da leitegada ao nascimento no desempenho de fêmeas puras Landrace até a puberdade." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/34651.

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O objetivo deste estudo foi avaliar o efeito do tamanho da leitegada na qual as leitoas nasceram e do peso individual ao nascer sobre a mortalidade e descarte até o momento da seleção e sobre a ocorrência da puberdade. Foram avaliadas 1525 leitoas Landrace identificadas e pesadas até 18 h após o nascimento. As fêmeas foram também pesadas ao desmame (n=1379), na saída da creche (n=1198) e na saída da recria (n=940). Foram criadas três classes de tamanho da leitegada: Pequena (7 a 11 leitões); Média (12 a 13 leitões) e Grande (14 a 19 leitões). As leitoas avaliadas foram também analisadas em trê
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6

Palm, Mathilda Palm. "FÖRÄNDRING AV GRISARS KULLSTORLEK OCH FÖDELSEVIKT ÖVER TID : Med fokus på raskorsning Yorkshire x Hampshire." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-163230.

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Breeding for a larger litter size has affected the vitality of piglets negatively. The larger litter sizes lead to lower individual birthweight. Smaller pigs have bigger difficulties to keep up their body temperature right after birth because of their lower muscle mass. Other factors that affect the vitality of the piglets are season, how the pigs are cared for and how they are housed. The purpose of the study is to analyze changes in litter size and birthweight over the time period 2013 to 2017. The study also analyses how litter size and birthweight is affected by season. The study performs
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7

Mendes, Diogo Manuel Ribeiro. "Efeito da paridade na produtividade dos leitões até ao desmame." Master's thesis, Universidade de Lisboa, Faculdade de Medicina Veterinária, 2016. http://hdl.handle.net/10400.5/12495.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>Existem diversos fatores que poderão influenciar o tamanho da ninhada, o peso médio dos leitões ao nascimento e, posteriormente, o número de leitões desmamados/porca e o peso médio dos leitões ao desmame. Um desses fatores é a paridade. Com o intuito de avaliar a influência da paridade na produtividade dos leitões até ao desmame foi analisado o desempenho reprodutivo de 45 porcas F1 (LW x LR). Foram registados para cada porca o número de nados totais (NT), nados vivos (NV) e nados mortos (NM). Os leitões nascidos vivos foram pe
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8

Schrank, Magdalena. "Contribution to and reconsideration of knowledge in small animal neonatology and gonadectomy in the dog." Doctoral thesis, Università degli studi di Padova, 2020. http://hdl.handle.net/11577/3425906.

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Part 1: Physiology of the neonate and indicators for its well-being Veterinary neonatology is a rather young field of research. Important differences between the physiology of the neonate compared to the adult have to be taken into consideration in its clinical evaluation. The first topic of the present PhD thesis describes the current knowledge of neonatal physiology and different methods for evaluation of the newborns’ viability. Methods such as the Apgar scoring system and blood gas analysis are successfully used in veterinary medicine. Birth weight and neonatal growth have been evaluated
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9

Seyfang, Jemma. "Birth litter sex ratio affects gilt behaviour, endocrine status and reproductive performance." Thesis, 2018. http://hdl.handle.net/2440/115173.

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This thesis tested the hypothesis that females that developed in a male biased litter would be masculinised and therefore have impaired reproductive performance and be more aggressive than those born into female biased litters. One of the aims of this thesis was to investigate new tools for selection of gilts into the breeding herd. Current selection criteria are minimal, with genetics, weight, and body conformation as the main determinants. We investigated effects of the sex ratio of a gilt’s birth litter, as in other litter bearing species it affects reproduction, behaviour, and physiology.
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10

Wittenburg, Dörte [Verfasser]. "Statistical modelling of birth weight variability within litter in pigs / vorgelegt von Dörte Wittenburg." 2008. http://nbn-resolving.de/urn:nbn:de:gbv:9-000518-5.

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11

"Effects of low litter birth weight on the pathogenesis of influenza A virus following experimental infection." Thesis, 2015. http://hdl.handle.net/10388/ETD-2015-01-1935.

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A fetus’ in utero environment has a profound effect on the individual’s development in postnatal life. Research has suggested that intrauterine growth restricted children have a less robust response to vaccination. Studies have confirmed similar results in animal models; however, the effect of low birth weight on clinical disease expression is unclear. This research aims to determine if pigs from low birth weight litters have increased severity of disease after experimental infection with influenza A virus (IAV) when compared to their counterparts from high birth weight litters, thus clarifyin
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12

DULOVCOVÁ, Ivana. "Analýza porodní hmotnosti a ztrát u selat." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-202598.

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The aim of the theses was to evaluate the characteristics of reproduction of sows with focus on birth weight of piglets and losses of piglets. Forty-two litters were studied. The average number of piglets born alive was 12.38. The average percentage of stillborn piglets per one litter was 5.43, the percentage of mortality until the weaning was 27.8. The average birth weight of piglets born alive was 1.29 kg. Most of the piglets (51%) fell into 1.051.5 kg category with an average weight of 1.30 kg. The relationship between number of piglets born alive and their birth weight was r = -0,121. The
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13

Zindove, Titus Jairus. "Effects of within-litter birth weight variation of piglets on performance at three weeks of age and at weaning." Thesis, 2011. http://hdl.handle.net/10413/8738.

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The impact of within-litter weight variation on the productivity of pig enterprises is poorly understood. The objective of the study was to determine the effect of within-litter birth weight variation on litter performance at three weeks of age and at weaning. The study was conducted using records from 1 788 litters, collected between January 1998 and September 2010, from a pig herd at the Agricultural Research Council (ARC), Irene. The records consisted of piglet identity, breed of sow, breed of boar, parity number, date of farrowing, number of piglets born alive (NBA), individual piglet weig
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14

Bayarbaatar, Buuveibaatar. "Factors Affecting Survival and Cause-specific Mortality of Saiga Calves (Saiga tatarica mongolica) in Mongolia." 2011. https://scholarworks.umass.edu/theses/663.

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Factors affecting juvenile survival are poorly known in the world’s most northern antelope, the endangered saiga (Saiga tatarica), yet they are fundamental for understanding what drives population change. For saiga neonates monitored in Sharga Nature Reserve, western Mongolia, during 2008–2010, male and single calves were heavier than those of female and twins, respectively. However, there was no significant difference in seasonal and annual survival rate between male and female or singletons and twins. Litter size and birth mass varied among years, and there was a negative relationship betwe
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15

ZIMOLOVÁ, Barbora. "STUDIUM VLIVŮ PŮSOBÍCÍCH V REPRODUKČNÍM PROCESU U PRASNIC SE ZVLÁŠTNÍM ZŘETELEM K PORODNÍMU OBDOBÍ." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-251908.

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The aim of the thesis was to reveal reserves for improving the piglets breeding and to reduce losses by death. The highest number of all (13.52 pcs) and live born (11.88 pcs) piglets were achieved in gilts embedded in more than 247 days of age. Gilts covered within 224 days of age showed the lowest average number of piglets born (13.13 pcs). Statistically, however, has not been demonstrated difference (p > 0.05) between age groups of gilts during the first recess in the number of piglets born. Effect of order of litter on litter size was found to be statistically highly significant (p < 0.01),
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