Energy cost of physical activities in growing broilers

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dc.contributor.authorHorna, F. [UNESP]
dc.contributor.authorLeandro, G. S. [UNESP]
dc.contributor.authorBícego, K. C. [UNESP]
dc.contributor.authorMacari, M. [UNESP]
dc.contributor.authorReis, M. P. [UNESP]
dc.contributor.authorCerrate, S.
dc.contributor.authorSakomura, N. K. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionCredinser LLC
dc.date.accessioned2023-07-29T16:13:33Z
dc.date.available2023-07-29T16:13:33Z
dc.date.issued2023-01-01
dc.description.abstract1. The time-energy budget method estimates the energy used for physical activity (PA) by integrating behaviour PA patterns with energy cost for specific PAs. Nevertheless, information about individual energy cost by type of PA are not available and so this study estimated the energy cost of PA for growing broilers. 2. An indirect calorimetry system for single birds was constructed to measure the variation in the rate of O2 consumption ((Formula presented.) O2, L/min) and rate of CO2 production ((Formula presented.) CO2, L/min) produced by these PAs. 3. A total of five birds were used in a replicated trial where their body weight (BW) ranged from 1.5 to 2.5 kg to measure the increase in heat production (HP) above resting levels as a result of PA. The procedure in the chamber was divided into five steps: (1) initial baselining, (2) resting metabolic rate, (3) PA such as feeding, drinking and other standing activities, (4) removal of gas exchange produced in step 3, and (5) final baselining. The PA was recorded using a video camera fixed at the chamber’s top (and outside). 4. The area under (Formula presented.) CO2 and (Formula presented.) O2 curves was used to calculate the CO2 production (vCO2, L) and O2 consumption (vO2, L). Then, the HP (cal/kg−0.75) was calculated according to the Brouwer equation. Two observers analysed the video records to estimate the time spent for each PA (seconds and frequency). 5. To calculate the energetic coefficients, the HP was regressed with the function of time spent to perform each PA allowing to estimate the energy cost for eating, drinking and stand activities, which were 0.607, 0.352 and 0.938 cal/kg−0.75/s, respectively.en
dc.description.affiliationSchool of Agricultural and Veterinarian Sciences São Paulo State University (UNESP), São Paulo
dc.description.affiliationCredinser LLC
dc.description.affiliationUnespSchool of Agricultural and Veterinarian Sciences São Paulo State University (UNESP), São Paulo
dc.identifierhttp://dx.doi.org/10.1080/00071668.2023.2191309
dc.identifier.citationBritish Poultry Science.
dc.identifier.doi10.1080/00071668.2023.2191309
dc.identifier.issn1466-1799
dc.identifier.issn0007-1668
dc.identifier.scopus2-s2.0-85159133618
dc.identifier.urihttp://hdl.handle.net/11449/249948
dc.language.isoeng
dc.relation.ispartofBritish Poultry Science
dc.sourceScopus
dc.subjectEnergy requirement
dc.subjectheat production
dc.subjecttime-energy budget
dc.titleEnergy cost of physical activities in growing broilersen
dc.typeArtigo
unesp.author.orcid0000-0002-1277-0120[1]
unesp.author.orcid0000-0002-1665-9796[2]
unesp.author.orcid0000-0002-1180-1132[3]
unesp.author.orcid0000-0002-6850-7145[4]
unesp.author.orcid0000-0001-8255-9032[5]
unesp.author.orcid0009-0009-7560-7353[6]
unesp.author.orcid0000-0001-5707-4113[7]
unesp.departmentMorfologia e Fisiologia Animal - FCAVpt
unesp.departmentZootecnia - FCAVpt

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Jaboticabal - FCAV - Faculdade de Ciências Agrárias e Veterinárias