Alterações comportamentais de bezerras criadas em bezerreiros tropicais com cobertura alternativa

Jéssica Caetano Dias Campos; Roberta Passini; Lainny Jordana Martins Pereira e Sousa; Alliny das Graças Amaral

doi:10.1590/1809-6891v24e-73923E

Behavioral changes in dairy calves raised in outdoor holding pens with alternative roofing

Authors

Jéssica Caetano Dias Campos Universidade Estadual de Goiás (UEG), Anápolis, Goiás, Brazil https://orcid.org/0000-0003-1223-9265
Roberta Passini Universidade Estadual de Goiás (UEG), Anápolis, Goiás, Brazil https://orcid.org/0000-0002-6011-6393
Lainny Jordana Martins Pereira e Sousa Universidade Estadual de Goiás (UEG), Anápolis, Goiás, Brazil https://orcid.org/0000-0003-1678-5626
Alliny das Graças Amaral Universidade Estadual de Goiás (UEG), Anápolis, Goiás, Brazil https://orcid.org/0000-0002-1418-9698

DOI:

https://doi.org/10.1590/1809-6891v24e-73923E

Abstract

This study assessed the behavior of dairy calves raised in outdoor holding pens covered with different geosynthetics. Twenty crossbred (Girolando, Jersey and Holstein) dairy calves undergoing weaning were used, with an average initial live weight of 40.6 Kg. A completely randomized block design was used, with a 4 x 3 factorial scheme and 5 repetitions. The roofing materials were polyethylene mesh, drainage geocomposite, nonwoven geotextile and woven geotextile, representing the first factor, and assessment times (8 to 11 a.m., 11:15 a.m. to 2 p.m. and 2:15 to 6 p.m.) the second factor. Environmental variables were analyzed, and the following heat stress indices calculated: black globe-humidity index (BGHI) and equivalent temperature. The average BGHI and equivalent temperature were 79 and 26, respectively. Walking behavior differed between treatments (P<0.05) and was more frequent in the woven geotextile treatment. The most frequent behavior observed throughout the day was lying in the shade (53%), demonstrating the importance of providing artificial shading during this stage of life. When compared to polyethylene mesh, the drainage geocomposite and nonwoven geotextile were better suited to providing shade for dairy calves undergoing weaning in tropical regions.
Keywords: cattle; heat stress; ethogram; shading; geotextile.

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Resumo Gráfico - Alterações comportamentais de bezerras criadas em bezerreiros tropicais com cobertura alternativa

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Published

2023-01-13

How to Cite

CAMPOS, J. C. D.; PASSINI, R.; SOUSA , L. J. M. P. e; AMARAL , A. das G. Behavioral changes in dairy calves raised in outdoor holding pens with alternative roofing. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 24, 2023. DOI: 10.1590/1809-6891v24e-73923E. Disponível em: https://revistas.ufg.br/vet/article/view/73923. Acesso em: 29 nov. 2024.

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Issue

Vol. 24 (2023): Continuous publication

Section

ZOOTECNIA

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