Physiological response, endrocrine and performance of broilers under cyclic heat stress

Detalhes bibliográficos
Autor(a) principal: Bueno, João Paulo Rodrigues
Data de Publicação: 2019
Tipo de documento: Tese
Idioma: eng
Título da fonte: Repositório Institucional da UFU
Texto Completo: https://repositorio.ufu.br/handle/123456789/24890
http://dx.doi.org/10.14393/ufu.te.2019.1223
Resumo: The objective of this study was to evaluate the effects of cyclic heat stress on the serum levels of thyroid hormones (T3 and T4), the thyroid histology, the performance, the temperatures (skin, cloaca, and litter), the feathering and the incidence of pododermatites in two broiler strains (Cobb SlowTM and Hubbard FlexTM), exposed to different heat protocols. It is possible to conclude that exposure to cyclic heat stress for 3 h from day 14 to day 42 did not affect performance, thyroid histology or the serum levels of T3 and T4 and there is no change in feathering and incidence of pododermatites. Cobb Slow™ broilers had the best live weight values at slaughter and higher cloacal temperature. With increasing age, T3 levels decrease and T4 levels increase. The temperatures of the broilers and litter increase as the ambient temperature increases.
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spelling Physiological response, endrocrine and performance of broilers under cyclic heat stressRespostas fisiológica, endócrina e desempenho de frangos sob estresse cíclico de calorFeatheringPododermatitesPoultrySkin temperatureThyroidal hormonesAviculturaEmpenamentoTemperatura superficialHormônios tireoidianosPododermatitesCNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIAThe objective of this study was to evaluate the effects of cyclic heat stress on the serum levels of thyroid hormones (T3 and T4), the thyroid histology, the performance, the temperatures (skin, cloaca, and litter), the feathering and the incidence of pododermatites in two broiler strains (Cobb SlowTM and Hubbard FlexTM), exposed to different heat protocols. It is possible to conclude that exposure to cyclic heat stress for 3 h from day 14 to day 42 did not affect performance, thyroid histology or the serum levels of T3 and T4 and there is no change in feathering and incidence of pododermatites. Cobb Slow™ broilers had the best live weight values at slaughter and higher cloacal temperature. With increasing age, T3 levels decrease and T4 levels increase. The temperatures of the broilers and litter increase as the ambient temperature increases.CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorFAPEMIG - Fundação de Amparo a Pesquisa do Estado de Minas GeraisTese (Doutorado)Avaliou-se os efeitos do estresse cíclico de calor sobre a concentração dos hormônios tireoidianos (T3 e T4), a histologia da tireoide, o desempenho, as temperaturas (superficial, cloacal e de cama), o empenamento e a incidência de pododermatites em frangos de corte, de duas linhagens (Cobb Slow® e Hubbard Flex®), mantidos em diferentes tempos de exposição ao calor. Concluiu-se que o estresse cíclico por calor por até 3 horas diárias dos 14 aos 42 dias de idade não altera a histologia da tireoide nem a concentração dos hormônios tireoidianos das aves, além disso, não prejudica o seu desempenho e não há alteração no empenamento e incidência de pododermatites. Ao abate, frangos Cobb apresentaram melhor peso vivo que frangos Hubbard e maior temperatura cloacal. Com a idade ocorre redução da concentração de T3 e aumento de T4. As temperaturas da ave e da cama aumentam conforme aumenta a temperatura do ambiente.Universidade Federal de UberlândiaBrasilPrograma de Pós-graduação em Ciências VeterináriasNascimento, Mara Regina Bueno de Mattoshttp://lattes.cnpq.br/6635591379326287Fernandes, Evandro de Abreuhttp://lattes.cnpq.br/6089364901182067Antunes, Robson Carloshttp://lattes.cnpq.br/7590358205144485Silveira, Ana Carolina Portellahttp://lattes.cnpq.br/6403336901580200Marchini, Cristiane Ferreira Prazereshttp://lattes.cnpq.br/3282029081601831Nascimento, Mara Regina Bueno de Mattoshttp://lattes.cnpq.br/6635591379326287Bueno, João Paulo Rodrigues2019-04-16T18:44:49Z2019-04-16T18:44:49Z2019-02-27info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisapplication/pdfBUENO, João Paulo Rodrigues. Physiological response, endocrine and performance of broilers under cyclic heat stress. 2019. 75 f. Tese (Doutorado em Ciências veterinárias) - Universidade Federal de Uberlândia, Uberlândia, 2019. DOI http://dx.doi.org/10.14393/ufu.te.2019.1223.https://repositorio.ufu.br/handle/123456789/24890http://dx.doi.org/10.14393/ufu.te.2019.1223enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFUinstname:Universidade Federal de Uberlândia (UFU)instacron:UFU2019-04-17T06:05:52Zoai:repositorio.ufu.br:123456789/24890Repositório InstitucionalONGhttp://repositorio.ufu.br/oai/requestdiinf@dirbi.ufu.bropendoar:2019-04-17T06:05:52Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU)false
dc.title.none.fl_str_mv Physiological response, endrocrine and performance of broilers under cyclic heat stress
Respostas fisiológica, endócrina e desempenho de frangos sob estresse cíclico de calor
title Physiological response, endrocrine and performance of broilers under cyclic heat stress
spellingShingle Physiological response, endrocrine and performance of broilers under cyclic heat stress
Bueno, João Paulo Rodrigues
Feathering
Pododermatites
Poultry
Skin temperature
Thyroidal hormones
Avicultura
Empenamento
Temperatura superficial
Hormônios tireoidianos
Pododermatites
CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA
title_short Physiological response, endrocrine and performance of broilers under cyclic heat stress
title_full Physiological response, endrocrine and performance of broilers under cyclic heat stress
title_fullStr Physiological response, endrocrine and performance of broilers under cyclic heat stress
title_full_unstemmed Physiological response, endrocrine and performance of broilers under cyclic heat stress
title_sort Physiological response, endrocrine and performance of broilers under cyclic heat stress
author Bueno, João Paulo Rodrigues
author_facet Bueno, João Paulo Rodrigues
author_role author
dc.contributor.none.fl_str_mv Nascimento, Mara Regina Bueno de Mattos
http://lattes.cnpq.br/6635591379326287
Fernandes, Evandro de Abreu
http://lattes.cnpq.br/6089364901182067
Antunes, Robson Carlos
http://lattes.cnpq.br/7590358205144485
Silveira, Ana Carolina Portella
http://lattes.cnpq.br/6403336901580200
Marchini, Cristiane Ferreira Prazeres
http://lattes.cnpq.br/3282029081601831
Nascimento, Mara Regina Bueno de Mattos
http://lattes.cnpq.br/6635591379326287
dc.contributor.author.fl_str_mv Bueno, João Paulo Rodrigues
dc.subject.por.fl_str_mv Feathering
Pododermatites
Poultry
Skin temperature
Thyroidal hormones
Avicultura
Empenamento
Temperatura superficial
Hormônios tireoidianos
Pododermatites
CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA
topic Feathering
Pododermatites
Poultry
Skin temperature
Thyroidal hormones
Avicultura
Empenamento
Temperatura superficial
Hormônios tireoidianos
Pododermatites
CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA
description The objective of this study was to evaluate the effects of cyclic heat stress on the serum levels of thyroid hormones (T3 and T4), the thyroid histology, the performance, the temperatures (skin, cloaca, and litter), the feathering and the incidence of pododermatites in two broiler strains (Cobb SlowTM and Hubbard FlexTM), exposed to different heat protocols. It is possible to conclude that exposure to cyclic heat stress for 3 h from day 14 to day 42 did not affect performance, thyroid histology or the serum levels of T3 and T4 and there is no change in feathering and incidence of pododermatites. Cobb Slow™ broilers had the best live weight values at slaughter and higher cloacal temperature. With increasing age, T3 levels decrease and T4 levels increase. The temperatures of the broilers and litter increase as the ambient temperature increases.
publishDate 2019
dc.date.none.fl_str_mv 2019-04-16T18:44:49Z
2019-04-16T18:44:49Z
2019-02-27
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv BUENO, João Paulo Rodrigues. Physiological response, endocrine and performance of broilers under cyclic heat stress. 2019. 75 f. Tese (Doutorado em Ciências veterinárias) - Universidade Federal de Uberlândia, Uberlândia, 2019. DOI http://dx.doi.org/10.14393/ufu.te.2019.1223.
https://repositorio.ufu.br/handle/123456789/24890
http://dx.doi.org/10.14393/ufu.te.2019.1223
identifier_str_mv BUENO, João Paulo Rodrigues. Physiological response, endocrine and performance of broilers under cyclic heat stress. 2019. 75 f. Tese (Doutorado em Ciências veterinárias) - Universidade Federal de Uberlândia, Uberlândia, 2019. DOI http://dx.doi.org/10.14393/ufu.te.2019.1223.
url https://repositorio.ufu.br/handle/123456789/24890
http://dx.doi.org/10.14393/ufu.te.2019.1223
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Uberlândia
Brasil
Programa de Pós-graduação em Ciências Veterinárias
publisher.none.fl_str_mv Universidade Federal de Uberlândia
Brasil
Programa de Pós-graduação em Ciências Veterinárias
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFU
instname:Universidade Federal de Uberlândia (UFU)
instacron:UFU
instname_str Universidade Federal de Uberlândia (UFU)
instacron_str UFU
institution UFU
reponame_str Repositório Institucional da UFU
collection Repositório Institucional da UFU
repository.name.fl_str_mv Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU)
repository.mail.fl_str_mv diinf@dirbi.ufu.br
_version_ 1823695102741053440

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