Journal of Animal Behaviour and Biometeorology
https://jabbnet.com/article/doi/10.14269/2318-1265.v01n01a02
Journal of Animal Behaviour and Biometeorology
Research Article Open Access

Effect of time of day and type of shading on the physiological responses of crossbred calves in tropical environment

Patrícia de Oliveira Lima, João Batista Freire de Souza Jr, Renata Nayhara de Lima, Francisca Cedma de Sousa Oliveira, Hérica Girlane Tertulino Domingos, Patrícia Tholon, Maria Viviane Freitas Gomes de Miranda

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Abstract

Many studies report the relationship between adverse environmental conditions and damage yield, especially in dairy cows. However, studies about the effects of the environment on young animals, especially calves of mixed-breed are rare. Were studied the effects of daytime and type of shading on physiological responses of crossbred calves in a tropical environment. Twenty-four ½ Holstein and WDB (without defined breed) calves were identified in two nursery facilities; one provided with natural shading and the other provided with artificial shading by fiber cement tile. In both facilities, air temperature, wind speed, and black globe temperature were recorded between 7 am to 4 pm to calculate the radiant thermal load. Physiological responses (rectal temperature and respiratory rates) were measured in the morning and in the afternoon. The natural shade provided less thermal comfort because of the higher radiant thermal load, especially in the afternoon. The crossbred calves showed higher rectal temperature and respiratory rate than WDB calves in both periods of the day and in both nursery facilities, with the highest values recorded under natural shade. Calves of different genotypes respond differently in hot environments, should be to test in future research another types of trees to verify their thermal quality.

Keywords

Bos taurus, nursery facility, physiological responses, thermal environment

References

Abreu PG, Abreu VMN, Costa OAD (2001) Avaliação de Coberturas de Cabanas de Maternidade em Sistema Intensivo de Suínos Criados ao Ar Livre (Siscal), no Verão. Revista Brasileira de Zootecnia 30:1728-1734. 

Bianca W (1963) Rectal temperature and respiratory rate as indicators of heat tolerance in cattle. Journal of Agricultural Science 60:113-120.

Campos OF, Oliveira JS, Lizieire RS, Silveira MI, Rodrigues AA (1992) Uso de abrigos como alternativa para os bezerreiros convencionais. Revista Brasileira de Zootecnia 21:954-967.

Cunha DNFV, Campos OF, Pereira JC, Pires MFA, Lizieire RS, Martuscello JA. (2007a) Desempenho, variáveis fisiológicas e comportamento de bezerros mantidos em diferentes instalações: época chuvosa. Revista Brasileira de Zootecnia 36:847-854.

Cunha DNFV, Campos OF, Pereira JC, Pires MFA, Lizieire RS, Martuscello JA (2007b). Desempenho, variáveis fisiológicas e comportamento de bezerros mantidos em diferentes instalações: época seca. Revista Brasileira de Zootecnia 36:1140-1146.

Dukes HH (1996) Fisiologia dos animais domésticos. Guanabara Koogan, Rio de Janeiro, Brasil.

Ferreira F, Pires FMA, Martinez ML, Coelho SG, Carvalho AU, Ferreira PM, Facury Filho EJ, Campos WE (2006) Parâmetros fisiológicos de bovinos cruzados submetidos ao estresse calórico. Arquivo Brasileiro de Medicina Veterinária e Zootecnia 58:732-738.

Hanh GL (1993) Bioclimatologia e instalações zootécnicas: aspectos teóricos e aplicados. Funep/UNESP, Jaboticabal, Brasil.

Lima PO, Moura AA, Façanha DA, Guilhermino MM (2006) Desempenho e indicadores de estresse térmico em bezerras alimentadas com sucedâneo lácteo com ou sem probiótico no semi-árido brasileiro. Archivos Latinoamericanos Produção Animal 14:49-55.

Pereira CL (2007) Monitoramento eletrônico do conforto térmico em abrigos individuais para bezerros com coberturas alternativas. Ensino e Ciência 5:73-76.

SAS (1999) User’s guide, version 8. SAS Institute, Cary, NC, p 295.

Schmidt-Nilsen K (2002) Animal Physiology: Adaptation and Environment. Cambridge Univ. Press, Cambridge, EUA.

Silva RG, Lascala Junior N, Lima Filho AE, Catharin MC (2002) Respiratory heat loss in the sheep: a comprehensive model. International Journal of Biometeorology 46:136-140.

Silva RG (2000) Introdução à bioclimatologia animal. Nobel, São Paulo.


Submitted date:
07/15/2013

Reviewed date:
07/23/2013

Accepted date:
07/24/2013

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