Machine learning algorithms to predict core, skin, and hair-coat temperatures of piglets

dc.contributor.authorGorczyca, Michael T.
dc.contributor.authorMilan, Hugo Fernando Maia
dc.contributor.authorCampos Maia, Alex Sandro [UNESP]
dc.contributor.authorGebremedhin, Kifle G.
dc.contributor.institutionCornell Univ
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.description.abstractInternal-body (core) and surface temperatures of livestock are important information that indicate heat stress status and comfort of animals. Previous studies focused on developing mechanistic and empirical models to predict these temperatures. Mechanistic models based on bioenergetics of animals often require parameters that may be difficult to obtain (e.g., thickness of internal tissues). Empirical models, on the other hand, are databased and often assume linear relationships between predictor (e.g., air temperature) and response (e.g., internal-body temperature) variables although, from the theory of bioenergetics, the relationship between the predictor and the response variables is non-linear. One alternative to consider non-linearity is to use machine learning algorithms to predict physiological temperatures. Unlike mechanistic models, machine learning algorithms do not depend on biophysical parameters, and, unlike linear empirical models, machine learning algorithms automatically select the predictor variables and find non-linear functions between predictor and response variables. In this paper, we tested four different machine learning algorithms to predict rectal (T-r), skin-surface (T-s), and hair-coat surface (T-h) temperatures of piglets based on environmental data. From the four algorithms considered, deep neural networks provided the best prediction for T-r with an error of 0.36%, gradient boosted machines provided the best prediction for T-s with an error of 0.62%, and random forests provided the best predictions for T-h with an error of 1.35%. These three algorithms were robust for a wide range of inputs. The fourth algorithm, generalized linear regression, predicted at higher errors and was not robust for a wide range of inputs. This study supports the use of machine learning algorithms (specifically deep neural networks, gradient boosted machines, and random forests) to predict physiological temperature responses of piglets.en
dc.description.affiliationCornell Univ, Dept Biol & Environm Engn, Ithaca, NY 14853 USA
dc.description.affiliationState Univ Sao Paulo, Lab Anim Biometeorol, Dept Anim Sci, Fac Agr & Vet Sci, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUnespState Univ Sao Paulo, Lab Anim Biometeorol, Dept Anim Sci, Fac Agr & Vet Sci, BR-14884900 Jaboticabal, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipUSDA/Hatch (Washington, DC) funds as part of the Cornell University
dc.description.sponsorshipIdCNPq: 203312/2014-7
dc.description.sponsorshipIdFAPESP: 17.519/14
dc.description.sponsorshipIdUSDA/Hatch (Washington, DC) funds as part of the Cornell University: W-3173
dc.identifier.citationComputers And Electronics In Agriculture. Oxford: Elsevier Sci Ltd, v. 151, p. 286-294, 2018.
dc.publisherElsevier B.V.
dc.relation.ispartofComputers And Electronics In Agriculture
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectMachine learning
dc.subjectPrecision livestock farming
dc.titleMachine learning algorithms to predict core, skin, and hair-coat temperatures of pigletsen
dcterms.rightsHolderElsevier B.V.[2]


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