• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 11
  • 4
  • 2
  • 1
  • Tagged with
  • 20
  • 20
  • 7
  • 6
  • 5
  • 5
  • 4
  • 4
  • 4
  • 3
  • 3
  • 3
  • 3
  • 3
  • 3
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The effects of dry sow housing conditions on welfare at farrowing

Marchant, Jeremy Neville January 1994 (has links)
Measures of production, physiology, behaviour and pathology were used to assess the effects of confined and loose dry sow and farrowing housing systems on the welfare of the sow and her litter. Litter size decreased and piglet mortality increased greatly after the sixth parity, regardless of housing system, resulting in a sharp decline in the number of piglets weaned per litter. Stall-housed sows gave birth to the most piglets per sow per year, but also had the highest piglet mortality. Overall, piglet mortality was higher in farrowing pens than in crates. Sows from the large group had a significantly larger number of returns to service after farrowing in crates. Behaviourally, all sows adapted well to the farrowing house. All sows showed an increase in the number of posture changes, reaching a maximum during the 24 hours immediately prior to parturition. However, this increase was greatest in those sows in farrowing crates, which had previously been housed in an open environment. Heart rate was influenced by stage of gestation, posture and behaviour. Stall-housed sows had a higher basal heart rate and heart rate response to feeding than group-housed sows, perhaps indicating decreased cardiovascular fitness and an increased sympathetic nervous response to stimuli such as food. When farrowing in crates, group-housed sows had a higher heart rate response to the suckling event than stall-housed sows. This may be due to general unresponsiveness in stalled sows or to high reactivity to the suckling event in group sows caused by frustration of mother-infant interaction. When involved in agonistic interactions, the change in heart rate was greatest for sows which lost a physical interaction. Stall-housed sows had weaker bones than group-housed sows, and different muscular conformation, probably due to lack of exercise. Bone and muscle weakness may increase the susceptibility of stall-housed sows to lameness. When lying down, stall-housed sows had greater difficulty and took longer than group-housed sows. The times taken for stall sows to lie down and to stand up quickly were positively correlated with body length. For group-housed sows lying down in the open, the time taken was positively correlated with proportional locomotory muscle weight. Spatial restriction when lying resulted in the loss of muscular control. There was a positive correlation between body length and the number of piglets crushed for stallhoused sows and group-housed sows farrowing in crates. There was also a positive correlation between body length and crushing mortality for group-housed sows farrowing in pens. This indicates that sows can have problems controlling movements, even in the presence of piglets. The results presented reveal several welfare problems resulting from stall housing during pregnancy. It would appear unreasonable to confine sows during farrowing, if they have previously been housed in an open environment. However, not enough is known about the causes of piglet mortality and any decision concerning the continued use of farrowing crates must take account of the trade-off between sow welfare and piglet welfare.
2

Structuring of breeding objectives in the pork supply chain in South Africa

Visser, Daniel Pieter. January 2004 (has links)
Thesis (Ph. D.) (Agricultural Economics)--University of Pretoria, 2004. / Summaries in English and Afrikaans. Title from opening screen (viewed March 14, 2005). Includes bibliographical references.
3

Feeding and managing of the high performing sow in pregnancy and lactation, and growth and development of progeny

McNamara, Louise B. January 2010 (has links)
No description available.
4

Vyhodnocení roční měrné produkce skleníkových a zátěžových plynů z vybraného chovu prasat

KABUĎA, David January 2018 (has links)
The diploma thesis deals with the issue of stable climate, amount of gas emissions in pig breeding. It evaluates the technology used in the selected breed and suggests improvement. Part of the thesis is a literary research of the issue of breeding from a physical and legislative point of view. The measurements were carried out using Commeter D4141, Testo 435 and INNOVA 1412. The measured values are compared to the EU directive. By measuring, it was found that despite the technology used, the existing limits in breeds were exceeded by up to 47%. There are suggested options for how to change this situation.
5

O desempenho dos produtores de suínos em uma cooperativa da região centro oriental do Rio Grande do Sul : um estudo exploratório

Luz, Nara Beatriz Lópes Pires da January 2001 (has links)
A propriedade suinícola encontra-se hoje numa fase que, dificilmente poderá fugir ao processo integrador, disponibilizado pelas empresas detentoras de recursos financeiros e tecnológicos. No entanto, o produtor sujeita-se a margens estreitas de lucratividade pelas facilidades que o processo em si lhe oferece. A presente pesquisa consiste num estudo exploratório com o objetivo de analisar o desempenho dos produtores, no sistema integrado de suínos, a partir da caracterização da cadeia de valor adaptada à atividade suinícola. Para isso, foram realizadas entrevistas com técnicos da área e aplicados questionários junto a doze suinocultores, — divididos em três categorias: pequenos, médios e grandes produtores — da Região Centro Oriental do Estado, participantes do sistema de integração da Cooperativa Agropecuária Languiru Ltda., em Teotônia — RS. A análise diagnóstico foi realizada com base no referencial teórico, envolvendo aspectos ligados à suinocultura, à cadeia produtiva, com ênfase no sistema de produção, e à cadeia de valores que ofereceu a melhor alternativa para identificar o desempenho dos suinocultores. Nesse contexto, observou-se estar o desempenho dos produtores condicionado à conversão alimentar e o período de engorda, associado ao processo de gestão da propriedade suinícola. / Rural properties devoted to pig breeding are currently in a situation in which they will hardly be able to avoid taking part in the integrating process made available by financially and technologically privileged companies. However, producers have to face low profit rates due to the features inherent to such process. This paper is a study which has as a goal to analyze the producers' performance in the pig breeding integrated system, departing from the chain of values adaptad to the pig breeding environment. To do so, interviews with technicians have been done, as well as questionnaires have been submitted to twelve pig breeders - split into three categories: small, medium and big producers - from the west central region of the state, that participate of the Cooperativa Agropecuária Languiru Ltda. integrating system, in Teutônia, RS. A diagnostic analysis was done based upon the theory related to pig breeding, the productive chain focused in this production system, and the chain of values that offered the best alternative to identify the producers' performances. In such context, it has been observed that the producers' performance is conditioned by food conversion and the fatten period, associated with the property mangement process.
6

O desempenho dos produtores de suínos em uma cooperativa da região centro oriental do Rio Grande do Sul : um estudo exploratório

Luz, Nara Beatriz Lópes Pires da January 2001 (has links)
A propriedade suinícola encontra-se hoje numa fase que, dificilmente poderá fugir ao processo integrador, disponibilizado pelas empresas detentoras de recursos financeiros e tecnológicos. No entanto, o produtor sujeita-se a margens estreitas de lucratividade pelas facilidades que o processo em si lhe oferece. A presente pesquisa consiste num estudo exploratório com o objetivo de analisar o desempenho dos produtores, no sistema integrado de suínos, a partir da caracterização da cadeia de valor adaptada à atividade suinícola. Para isso, foram realizadas entrevistas com técnicos da área e aplicados questionários junto a doze suinocultores, — divididos em três categorias: pequenos, médios e grandes produtores — da Região Centro Oriental do Estado, participantes do sistema de integração da Cooperativa Agropecuária Languiru Ltda., em Teotônia — RS. A análise diagnóstico foi realizada com base no referencial teórico, envolvendo aspectos ligados à suinocultura, à cadeia produtiva, com ênfase no sistema de produção, e à cadeia de valores que ofereceu a melhor alternativa para identificar o desempenho dos suinocultores. Nesse contexto, observou-se estar o desempenho dos produtores condicionado à conversão alimentar e o período de engorda, associado ao processo de gestão da propriedade suinícola. / Rural properties devoted to pig breeding are currently in a situation in which they will hardly be able to avoid taking part in the integrating process made available by financially and technologically privileged companies. However, producers have to face low profit rates due to the features inherent to such process. This paper is a study which has as a goal to analyze the producers' performance in the pig breeding integrated system, departing from the chain of values adaptad to the pig breeding environment. To do so, interviews with technicians have been done, as well as questionnaires have been submitted to twelve pig breeders - split into three categories: small, medium and big producers - from the west central region of the state, that participate of the Cooperativa Agropecuária Languiru Ltda. integrating system, in Teutônia, RS. A diagnostic analysis was done based upon the theory related to pig breeding, the productive chain focused in this production system, and the chain of values that offered the best alternative to identify the producers' performances. In such context, it has been observed that the producers' performance is conditioned by food conversion and the fatten period, associated with the property mangement process.
7

O desempenho dos produtores de suínos em uma cooperativa da região centro oriental do Rio Grande do Sul : um estudo exploratório

Luz, Nara Beatriz Lópes Pires da January 2001 (has links)
A propriedade suinícola encontra-se hoje numa fase que, dificilmente poderá fugir ao processo integrador, disponibilizado pelas empresas detentoras de recursos financeiros e tecnológicos. No entanto, o produtor sujeita-se a margens estreitas de lucratividade pelas facilidades que o processo em si lhe oferece. A presente pesquisa consiste num estudo exploratório com o objetivo de analisar o desempenho dos produtores, no sistema integrado de suínos, a partir da caracterização da cadeia de valor adaptada à atividade suinícola. Para isso, foram realizadas entrevistas com técnicos da área e aplicados questionários junto a doze suinocultores, — divididos em três categorias: pequenos, médios e grandes produtores — da Região Centro Oriental do Estado, participantes do sistema de integração da Cooperativa Agropecuária Languiru Ltda., em Teotônia — RS. A análise diagnóstico foi realizada com base no referencial teórico, envolvendo aspectos ligados à suinocultura, à cadeia produtiva, com ênfase no sistema de produção, e à cadeia de valores que ofereceu a melhor alternativa para identificar o desempenho dos suinocultores. Nesse contexto, observou-se estar o desempenho dos produtores condicionado à conversão alimentar e o período de engorda, associado ao processo de gestão da propriedade suinícola. / Rural properties devoted to pig breeding are currently in a situation in which they will hardly be able to avoid taking part in the integrating process made available by financially and technologically privileged companies. However, producers have to face low profit rates due to the features inherent to such process. This paper is a study which has as a goal to analyze the producers' performance in the pig breeding integrated system, departing from the chain of values adaptad to the pig breeding environment. To do so, interviews with technicians have been done, as well as questionnaires have been submitted to twelve pig breeders - split into three categories: small, medium and big producers - from the west central region of the state, that participate of the Cooperativa Agropecuária Languiru Ltda. integrating system, in Teutônia, RS. A diagnostic analysis was done based upon the theory related to pig breeding, the productive chain focused in this production system, and the chain of values that offered the best alternative to identify the producers' performances. In such context, it has been observed that the producers' performance is conditioned by food conversion and the fatten period, associated with the property mangement process.
8

Vyhodnocení výkrmu prasat na školním statku v Měšicích / The evaluation of pig fattening at the farm school in Měšice

BONTEA, Petra January 2012 (has links)
The aim of this thesis was to evaluate the pig fattening at the school farm in Měšice. The work is concern with the evaluation of the fattening period, the production and realization price of the pigs. The monitoring was conducted from 2010 to 2011. The evaluation included a total of 1994 pigs. The thesis take into consideration not only the initial and final weight of the animals, the losses, duration of the fattening period and the average slaughter weight, but also the total costs of their fattening. The statistical analysis was performed using Microsoft Excel. To evaluate the results the monitored indicators were calculated as average values and differences between data. When taken into the pre?fattening in 2010 the average weight reached 5.10 kg per piglet. In 2011 this figure dropped to 5.05 kg. The average weight of pigs sold in 2010 was 107.35 kg. It declined in 2011 to 101.27 kg. In 2010 the school farm in Měšice achieved an average daily weight gain of 0.67 kg. This number increased in 2011 to 0.74 kg. The average fattening cost per pig/day, during the reporting period in 2010, was 26.07 CZK. There was an increase the following year by 0.89 CZK to the amount of 26.96 CZK. When selling the pork meat in 2010, the average realized price by the farm was 26.46 CZK/kg. In 2011, the average realized price rose by 2.35 CZK / kg, thus increased to CZK 28.81CZK/kg Considering all the indicators and the production costs of the pig meat, the farm encountered a loss for the entire reporting period.
9

Potencial reprodutivo de fêmeas suínas da raça Moura criadas em sistema semi intensivo / Reproductive potential of females pigs the Moura breed created in semi-intensive system

Ferreira, Rafael Vitor [UNESP] 01 September 2016 (has links)
Submitted by Rafael Vitor Ferreira null (raphael_vfe@hotmail.com) on 2016-10-30T22:23:27Z No. of bitstreams: 1 DiSSERTAÇÃO Rafael Vitor Ferreira.pdf: 927532 bytes, checksum: a411b3eb773aa86dde595844a8179323 (MD5) / Approved for entry into archive by Felipe Augusto Arakaki (arakaki@reitoria.unesp.br) on 2016-11-04T16:31:57Z (GMT) No. of bitstreams: 1 ferreira_rv_me_ilha.pdf: 832160 bytes, checksum: a11ba065cb8c325bcc5466028cd03cc5 (MD5) / Made available in DSpace on 2016-11-04T16:31:57Z (GMT). No. of bitstreams: 1 ferreira_rv_me_ilha.pdf: 832160 bytes, checksum: a11ba065cb8c325bcc5466028cd03cc5 (MD5) Previous issue date: 2016-09-01 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O objetivo deste trabalho é disponibilizar dados de desempenho reprodutivo e produtivo de suínos da raça Moura mantidos em sistema semi-intensivo, bem como avaliar o potencial de utilização do cruzamento de fêmeas Moura com macho sintético, MS115, para produção de leitões. Os dados utilizados no estudo fazem parte do banco de dados do setor de suínos da Fazenda de Ensino, Pesquisa e Extensão da Unesp – Campus de Ilha Solteira - SP. No primeiro estudo foram selecionados e classificados resultados de desempenho reprodutivo (nascidos totais, nascidos vivos, perdas, mortalidade 1 a 21 dias, mortalidade do nascimento ao desmame, peso ao nascimento, peso aos 21 dias, peso aos desmame, ganho de peso até 21 dias e ganho de peso diário até o desmame) de 332 parições oriundas de acasalamento entre machos e fêmeas da raça Moura no período de 2006 a 2016. Para a classificação foram consideradas as ordens de parto (da primeira à sétima) e as estações do ano (primavera, verão, outono e inverno). A estação do ano pouco influenciou no desempenho das matrizes, mas os partos de 4ª e 5ª ordem apresentaram os melhores resultados para número de nascidos vivos e peso ao nascimento. No segundo estudo foram avaliados 60 partos, 30 provenientes do acasalamento de machos e fêmeas puros da raça Moura, e 30 provenientes do cruzamento entre fêmeas Moura e machos MS115, totalizando 526 leitões para avaliação até o desmame. Os partos foram classificados de acordo com a origem genética do macho, ordem de parto e estação do ano. De forma geral a origem do macho não interferiu (P>0,05) no número total de leitões nascidos/parto, leitões vivos/parto e taxas de mortalidade, porém o cruzamento da fêmea Moura com o macho MS115 promoveu melhor (P<0,05) desempenho das leitegadas até o desmame. Independente da origem genética do macho, para 3ª ordem de parto foi observado o maior de leitões nascidos e leitões vivos/parto (P<0,05), mas também a maior mortalidade até o desmame. / The objective of this study is to provide data for reproductive and productive performance Moura breed sows kept in semi-intensive system and to evaluate the potential use of Moura sows crossing with synthetic male, MS115, for the production of piglets. The data used in the study are part of the pig farm database of Farm Research, Education and Extension UNESP –Ilha Solteira - SP. In the first study were selected and classified results of reproductive performance (total number of piglets born/parturition, alive piglets/parturition, losses, mortality 1 to 21 days, mortality at weaning, birth weight, weight at 21 days, weight at weaning, daily weight gain up to 21 days and daily weight gain until weaning) 332 parities derived from mating between males and females of Moura breed from 2006 to 2016. For classification were considered the parturition order (the first to seventh) and seasons (spring, summer, autumn and winter). The season had little influence on the performance of the sows, but the 4th and 5th birth order showed the best results for number of live births and birth weight. In the second study we evaluated 60 births, 30 from the mating males and females of Moura breed and 30 from the cross between Moura sows and MS115males, totaling 526 piglets for evaluation until weaning. The births were classified according to genetic male, parturition order and season. In general, the male origin did not affect (P>0.05) the total number of piglets born/parturition, living piglets/parturition and mortality rates, but the crossing between Moura female and MS115male promoted better (P <0.05) performance of piglets until weaning. Regardless of the genetic male origin, in the 3rd parturition order occurred the largest number of piglets born/parturition and alive piglets/parturition(P<0.05), but also the highest mortality until weaning(P<0.05).
10

Potencial reprodutivo de fêmeas suínas da raça Moura criadas em sistema semi intensivo /

Ferreira, Rafael Vitor January 2016 (has links)
Orientador: Rosemeira da Silva Filardi / Resumo: O objetivo deste trabalho é disponibilizar dados de desempenho reprodutivo e produtivo de suínos da raça Moura mantidos em sistema semi-intensivo, bem como avaliar o potencial de utilização do cruzamento de fêmeas Moura com macho sintético, MS115, para produção de leitões. Os dados utilizados no estudo fazem parte do banco de dados do setor de suínos da Fazenda de Ensino, Pesquisa e Extensão da Unesp – Campus de Ilha Solteira - SP. No primeiro estudo foram selecionados e classificados resultados de desempenho reprodutivo (nascidos totais, nascidos vivos, perdas, mortalidade 1 a 21 dias, mortalidade do nascimento ao desmame, peso ao nascimento, peso aos 21 dias, peso aos desmame, ganho de peso até 21 dias e ganho de peso diário até o desmame) de 332 parições oriundas de acasalamento entre machos e fêmeas da raça Moura no período de 2006 a 2016. Para a classificação foram consideradas as ordens de parto (da primeira à sétima) e as estações do ano (primavera, verão, outono e inverno). A estação do ano pouco influenciou no desempenho das matrizes, mas os partos de 4ª e 5ª ordem apresentaram os melhores resultados para número de nascidos vivos e peso ao nascimento. No segundo estudo foram avaliados 60 partos, 30 provenientes do acasalamento de machos e fêmeas puros da raça Moura, e 30 provenientes do cruzamento entre fêmeas Moura e machos MS115, totalizando 526 leitões para avaliação até o desmame. Os partos foram classificados de acordo com a origem genética do... (Resumo completo, clicar acesso eletrônico abaixo) / Mestre

Page generated in 0.0515 seconds