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Article

The Sequential Behavior Pattern Analysis of Broiler Chickens Exposed to Heat Stress

1
College of Agricultural Engineering, State University of Campinas, Campinas 13083-875, SP, Brazil
2
Institute of Exact Sciences and Technology, Graduate Program in Production Engineering, University Paulista, Jaguaré 05347-020, SP, Brazil
3
Animal Science Department, Federal University of Santa Maria, Santa Maria 97105-900, RS, Brazil
4
Embrapa Agricultural Informatics, Campinas 13083-886, SP, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Brett Ramirez
Received: 21 May 2021 / Revised: 14 June 2021 / Accepted: 21 June 2021 / Published: 25 June 2021
(This article belongs to the Special Issue Innovative Technology in Livestock Production)
Broiler productivity is dependent on a range of variables; among them, the rearing environment is a significant factor for proper well-being and productivity. Behavior indicates the bird’s initial response to an adverse environment and is capable of providing an indicator of well-being in real-time. The present study aims to identify and characterize the sequential pattern of broilers’ behavior when exposed to thermoneutral conditions (TNZ) and thermal stress (HS) by constant heat. The research was carried out in a climatic chamber with 18 broilers under thermoneutral conditions and heat stress for three consecutive days (at three different ages). The behavior database was first analyzed using one-way ANOVA, Tukey test by age, and Boxplot graphs, and then the sequence of the behaviors was evaluated using the generalized sequential pattern (GSP) algorithm. We were able to predict behavioral patterns at the different temperatures assessed from the behavioral sequences. Birds in HS were prostrate, identified by the shorter behavioral sequence, such as the {Lying down, Eating} pattern, unlike TNZ ({Lying down, Walking, Drinking, Walking, Lying down}), which indicates a tendency to increase behaviors (feeding and locomotor activities) that guarantee the better welfare of the birds. The sequence of behaviors ‘Lying down’ followed by ‘Lying laterally’ occurred only in HS, which represents a stressful thermal environment for the bird. Using the pattern mining sequences approach, we were able to identify temporal relationships between thermal stress and broiler behavior, confirming the need for further studies on the use of temporal behavior sequences in environmental controllers. View Full-Text
Keywords: animal welfare; animal behavior; behavioral pattern detection; sequential pattern mining animal welfare; animal behavior; behavioral pattern detection; sequential pattern mining
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MDPI and ACS Style

Branco, T.; Moura, D.J.d.; de Alencar Nääs, I.; da Silva Lima, N.D.; Klein, D.R.; Oliveira, S.R.d.M. The Sequential Behavior Pattern Analysis of Broiler Chickens Exposed to Heat Stress. AgriEngineering 2021, 3, 447-457. https://0-doi-org.brum.beds.ac.uk/10.3390/agriengineering3030030

AMA Style

Branco T, Moura DJd, de Alencar Nääs I, da Silva Lima ND, Klein DR, Oliveira SRdM. The Sequential Behavior Pattern Analysis of Broiler Chickens Exposed to Heat Stress. AgriEngineering. 2021; 3(3):447-457. https://0-doi-org.brum.beds.ac.uk/10.3390/agriengineering3030030

Chicago/Turabian Style

Branco, Tatiane, Daniella J.d. Moura, Irenilza de Alencar Nääs, Nilsa D. da Silva Lima, Daniela R. Klein, and Stanley R.d.M. Oliveira 2021. "The Sequential Behavior Pattern Analysis of Broiler Chickens Exposed to Heat Stress" AgriEngineering 3, no. 3: 447-457. https://0-doi-org.brum.beds.ac.uk/10.3390/agriengineering3030030

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