Heat stress affects breathing and metabolism of chicks incubated at high temperature

Autor(es)

Patrone, Luis Gustavo A. ; Rocha, Aline C. G. ; Bernardes-Ribeiro, Mariana ; Lopes-da-Costa, Gleyce ; Macari, Marcos ; Bicego, Kenia C. ; Gargaglioni, Luciane H.

• Tipo de documento: Artigo Científico
• Fonte: Respiratory Physiology & Neurobiology; v. 314, p. 6-pg., 2023-06-20.

Resumo

Global warming poses serious implications to animal physiology and a gradual increase in ambient temperature affects all living organisms, particularly fast-growing selected species. We recorded ventilation ( VE), body temperature (TB), oxygen consumption ( VO2) and respiratory equivalent ( VE/ VO2) of 14-day-old (14d) male and female chicks at room air conditions, hypercapnia and hypoxia at heat stress (HS, 32 degrees C). These chicks had previously been exposed to control (CI, 37.5 degrees C) and high (HI, 39 degrees C) temperatures during the first 5 days of incubation. Under resting conditions, acute HS increased VE in HI females but not in HI males. Hypercapnia combined with heat promoted a potentiation of CO2-hyperventilatory response in HI females when compared with thermoneutral condition, whereas in HI incubated males a hypoventilation under hypercapnia and heat stress was observed compared to the CI group. Hypoxia associated with heat stress increased VE only in HI females. Our data indicates that females are more sensitive to thermal manipulation during incubation and it seems that the thermal embryonic manipulation, at least during the first days of development, does not improve the adaptive response of chicks to heat stress. (AU)

• Processo FAPESP: 20/01702-2 - Fisiopatologia da sensibilidade ao CO2: papel do locus coeruleus
• Beneficiário: Luciane Helena Gargaglioni Batalhão
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 21/13370-7 - Avaliação da resposta imune, metabólica e da quimiossensibilidade de frangos após alteração da microbiota in ovo
• Beneficiário: Marcos Macari
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/14646-6 - Papel de triptofano/serotonina na regulação das respostas fisiológicas ao estresse térmico em pintos de corte
• Beneficiário: Kênia Cardoso Bícego
• Modalidade de apoio: Auxílio à Pesquisa - Regular