Avaliação do bem-estar de frangos de corte em dois galpões comerciais climatizados

Damasceno, Flávio Alves; Yanagi, Tadayuki; Lima, Renato Ribeiro de; Gomes, Raphaela Christina Costa; Moraes, Sandra Regina Pires de

doi:10.1590/s1413-70542010000400033

Cited by 29 publications

(24 citation statements)

References 8 publications

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“…DAMASCENO et al, (2010), working with two ventilation systems (poultry shed equipped with tunnel ventilation (negative pressure) and a system of evaporative cooling of porous, wet material and fogging) verified mean FC values of 2,392 and 2,384 g, respectively, for the birds.…”

Section: Resultsmentioning

confidence: 92%

Energy balance in the poultry-shed system and its influence on broiler performance

2015

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ABSTRACT:The objective of this study was to determine the energy balance of the poultry-shed system and its effect on broiler performance during the production cycle. The experimental design was completely random with sub-divided blocks. The blocks were composed of five different types of sheds and the sub-blocks of the evaluation times (00:00 h to 23:00 h), allowing an analysis of variance and a comparison between means with the Tukey test. There were no significant differences between the mean values of the exchanges of sensible, latent and total heat between the poultry sheds but the differences for the evaluation times were significant (P<0.05). There was no significant difference between sheds 1 and 4 for broiler productive performance regarding weight gain, feed consumption and feed conversion. Bird performance was significant (P<0.05) for the remaining poultry sheds. The productive indexes remained below the ranges considered ideal for broilers and values in the final weeks were characterized by the poor installation efficiency in controlling temperature variations and, consequently, the energy balance in the system, which adversely affected bird productive performance. KEYWORDS: broiler industry, thermal comfort, thermography BALANÇO DE ENERGIA NO SISTEMA AVE-GALPÃO E SUA INFLUÊNCIA NO DESEMPENHO DE FRANGOS DE CORTERESUMO: Objetivou-se com este estudo a determinação do balanço de energia no sistema ave--galpão e seu efeito no desempenho de frangos de corte, durante o ciclo de produção. O delineamento experimental adotado foi o inteiramente ao acaso, no esquema de parcelas subdivididas, tendo-se nas parcelas cinco galpões, com tipologias distintas e, nas subparcelas, os horários de avaliação (00:00 h às 23:00 h), o que permitiu a análise de variância e a comparação entre médias, pelo teste de Tukey. Os valores médios das trocas de calor sensível, latente e totais não apresentaram diferença significativa entre os galpões estudados, mas quanto aos horários o efeito foi significativo (P<0,05). O desempenho produtivo das aves não apresentou diferença significativa nos galpões 1 e 4 para as variáveis ganho de peso, mortalidade, consumo de ração e conversão alimentar. Para os demais galpões, evidenciou-se efeito significativo (P<0,05) na performance dos animais. Nota-se que os índices produtivos se mantiveram abaixo das faixas tidas como ideais para a avicultura de corte, e os valores das últimas semanas são caracterizados pela baixa eficiência das instalações em controlar a variação da temperatura, e com isso, o balanço de energia no sistema, o que afetou negativamente o desempenho produtivo das aves.PALAVRAS-CHAVE: avicultura de corte, conforto térmico, termografia.

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Section: Resultsmentioning

confidence: 92%

Energy balance in the poultry-shed system and its influence on broiler performance

2015

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“…Fatores térmicos inadequados podem comprometer o desenvolvimento e bemestar das aves (DAMASCENO et al, 2010 A média e erro padrão para H:L foram 0,47±0,02 para AC e 0,45±0,02 para AE (P>0,05), dentro dos valores de referência (Tabela 2). Foi observado um aumento para eritrócitos, leucócitos, heterófi los, linfócitos, monócitos e eosinófi los (P<0,05), com o decorrer da idade das aves, coerente com a literatura (CLARK et al, 2009).…”

Section: Resultsunclassified

O enriquecimento ambiental sobre o bem-estar de frangos de corte

et al. 2014

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“…One of the indicative of thermal stress, or thermal comfort assessment, is the measurement of the specific enthalpy of air expressed as the amount of thermal energy (heat) in kJ contained in 1 kg of dry air. This index is used to quantify and classify the thermal discomfort of broilers, which they may have their physiological responses and performance J Anim Behav Biometeorol (2020) 8:131-135 affected, as described by Rodrigues et al (2010) and Damasceno et al (2010).…”

Section: Design Of Farm Facilities and Thermal Comfortmentioning

confidence: 99%

The challenges of animal welfare in modern Brazilian poultry farming

Sakamoto

Benincasa

Silva

et al. 2020

JABB

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The Brazilian poultry industry is undergoing a process of increasing rigor regarding production practices related to breeding and pre-slaughter operations since animal welfare is an extremely important subject that has received great attention in the developed countries. Brazil is one of the greatest producers of chicken meat, concerns have existed in the sense of adequacy to continue attending to the demand of export and maintenance of the position of leadership, in front of the other market players. One of the key points is the necessity to improve the intensive farming, which currently has many obstacles that prejudice the basic principles of animal welfare assurance. Relatively simple problems in handling animals, litter and equipment, as well as the lack of preventive maintenance in the facilities are the main ones responsible for the thermal discomfort and quality of life of these animals. Despite all the considerations raised, a large part of the Brazilian consumers is still unaware of intensive farming and the way animals are raising on the farm until their plates, being surrounded by myths and false beliefs. Therefore, the purpose of this review is to address the main critical issues affecting the welfare of broiler chickens in intensive commercial production.

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Avaliação do bem-estar de frangos de corte em dois galpões comerciais climatizados

Cited by 29 publications

References 8 publications

Energy balance in the poultry-shed system and its influence on broiler performance

Energy balance in the poultry-shed system and its influence on broiler performance

O enriquecimento ambiental sobre o bem-estar de frangos de corte

The challenges of animal welfare in modern Brazilian poultry farming

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