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2025, Vol: 15, Issue: 2
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Original Article


Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru

Paola Laura Rolando, Rocio Silvia Sandoval-monzón, Milena Paola Montenegro, Luis Felipe Ruiz-garcía.

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Abstract
Background: Heat stress result in a mild reduction on milk production, while long term heat stress exposure can severely affect the productive and reproductive performance in dairy cattle.
Aim: The objective of this study was to quantify the relationship between reproductive performance and temperature-humidity index in dairy cattle farms in Lima, Peru.
Methods: Monthly service, conception and pregnancy rates were measured on four dairy farms from four different Lima localities as reproductive performance indicators, along with an index of heat stress, maximum daily temperature humidity index (Max THI), during a three-year period. In order to establish the relationship between the max THI and the reproductive performance indicators, a multiple regression analysis was made which considered the variable farm and year as explicative variables.
Results: The regression model showed an adjusted R-squared of 33.5% with an estimated standard error of 5.75% and was highly significant (p<0.001). The regression coefficients for Max THI for the variables pregnancy rate and conception rate were significant (p<0.0001). With every increasing unit of Max THI, a 0.84% drop of the pregnancy rate, and a drop of 1.74% of the conception rate was estimated by the model. The regression coefficient of Max THI for the service rate variable was not significant.
Conclusion: It was concluded that the increase of the Max THI significantly affected the reproductive performance of intensive dairy cattle farms in Lima.

Key words: Reproductive performance; temperature-humidity index, dairy cattle, heat stress


 
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How to Cite this Article
Pubmed Style

Rolando PL, Sandoval-monzón RS, Montenegro MP, Ruiz-garcía LF. Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru. Open Vet J. 2022; 12(3): 399-406. doi:10.5455/OVJ.2022.v12.i3.14

Web Style

Rolando PL, Sandoval-monzón RS, Montenegro MP, Ruiz-garcía LF. Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru. https://www.openveterinaryjournal.com/?mno=101930 [Access: March 18, 2025]. doi:10.5455/OVJ.2022.v12.i3.14

AMA (American Medical Association) Style

Rolando PL, Sandoval-monzón RS, Montenegro MP, Ruiz-garcía LF. Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru. Open Vet J. 2022; 12(3): 399-406. doi:10.5455/OVJ.2022.v12.i3.14


Vancouver/ICMJE Style

Rolando PL, Sandoval-monzón RS, Montenegro MP, Ruiz-garcía LF. Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru. Open Vet J. (2022), [cited March 18, 2025]; 12(3): 399-406. doi:10.5455/OVJ.2022.v12.i3.14


Harvard Style

Rolando, P. L., Sandoval-monzón, . R. S., Montenegro, . M. P. & Ruiz-garcía, . L. F. (2022) Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru. Open Vet J, 12 (3), 399-406. doi:10.5455/OVJ.2022.v12.i3.14


Turabian Style

Rolando, Paola Laura, Rocio Silvia Sandoval-monzón, Milena Paola Montenegro, and Luis Felipe Ruiz-garcía. 2022. Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru. Open Veterinary Journal, 12 (3), 399-406. doi:10.5455/OVJ.2022.v12.i3.14


Chicago Style

Rolando, Paola Laura, Rocio Silvia Sandoval-monzón, Milena Paola Montenegro, and Luis Felipe Ruiz-garcía. "Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru." Open Veterinary Journal 12 (2022), 399-406. doi:10.5455/OVJ.2022.v12.i3.14


MLA (The Modern Language Association) Style

Rolando, Paola Laura, Rocio Silvia Sandoval-monzón, Milena Paola Montenegro, and Luis Felipe Ruiz-garcía. "Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru." Open Veterinary Journal 12.3 (2022), 399-406. Print. doi:10.5455/OVJ.2022.v12.i3.14


APA (American Psychological Association) Style

Rolando, P. L., Sandoval-monzón, . R. S., Montenegro, . M. P. & Ruiz-garcía, . L. F. (2022) Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru. Open Veterinary Journal, 12 (3), 399-406. doi:10.5455/OVJ.2022.v12.i3.14


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