| Texto completo | |
| Autor(es): |
Nascimento, Sheila T.
;
Maia, Alex S. C.
;
Gebremedhin, Kifle G.
;
Nascimento, Carolina C. N.
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | POULTRY SCIENCE; v. 96, n. 8, p. 2691-2698, AUG 2017. |
| Citações Web of Science: | 1 |
| Resumo | |
Accurate measurements of gas exchange between an animal and its environment is critical in determining metabolic heat production and respiratory functions of broilers. Information on non-invasive methods to measure gas exchange of broiler chicks and chickens under uncontrolled environmental conditions is lacking in the literature. The aims of this study were: (1) to develop an indirect calorimetric system including a hood that allows gas exchange for chickens, (2) to measure gas exchange and respiratory functions (respiration rate, ventilation rate, and tidal volume) of broiler chickens weighing greater than 250 g, and (3) to calculate heat production and respiratory evaporation of the birds based on measured gas and vapor exchanges. We conducted two trials. The first trial involved 6 broiler chicks evaluated for 6 days in 6 different schedules (6 x 6 Latin square). The chicks were kept inside a heat exchanger with a continuous air flow of 150 mL min(-1). The second trial involved 12 birds evaluated for 12 days in 12 different schedules (12 x 12 Latin square). Metabolic heat production and evaporation were influenced by live weight of chicks, varying between evaluation days (P < 0.05). The respiratory functions (tidal volume, ventilation rate, and respiratory rate) varied between days, and were strongly influenced by live weight of the broilers (P < 0.05). (AU) | |
| Processo FAPESP: | 11/17388-6 - Efeito da radiação solar e da temperatura na emissão de metano associado com a produção calor metabólico e perda de calor latente em ruminantes |
| Beneficiário: | Alex Sandro Campos Maia |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 11/12816-0 - Modelagem do equilíbrio térmico de frangos de corte: um estudo da geração, produção e perda de calor |
| Beneficiário: | Sheila Tavares Nascimento |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |