Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru
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 tempera...
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| Format: | Article |
| Language: | English |
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Tripoli University
2022-06-01
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| Series: | Open Veterinary Journal |
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| Online Access: | https://www.openveterinaryjournal.com/OVJ-2022-03-042%20P.L.%20Rolando%20et%20al.pdf |
| _version_ | 1811236660302577664 |
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| author | Paola Laura Rolando Rocio Silvia Sandoval-Monzón Milena Paola Montenegro Luis Felipe Ruiz-García |
| author_facet | Paola Laura Rolando Rocio Silvia Sandoval-Monzón Milena Paola Montenegro Luis Felipe Ruiz-García |
| author_sort | Paola Laura Rolando |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-12T12:11:46Z |
| format | Article |
| id | doaj.art-db607bdc025b41689ec5332df3202d3f |
| institution | Directory Open Access Journal |
| issn | 2226-4485 2218-6050 |
| language | English |
| last_indexed | 2024-04-12T12:11:46Z |
| publishDate | 2022-06-01 |
| publisher | Tripoli University |
| record_format | Article |
| series | Open Veterinary Journal |
| spelling | doaj.art-db607bdc025b41689ec5332df3202d3f2022-12-22T03:33:33ZengTripoli UniversityOpen Veterinary Journal2226-44852218-60502022-06-0112339940610.5455/OVJ.2022.v12.i3.14Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, PeruPaola Laura Rolando0https://orcid.org/0000-0003-2587-9245Rocio Silvia Sandoval-Monzón1https://orcid.org/0000-0002-6249-9076Milena Paola Montenegro2https://orcid.org/0000-0001-7971-5778Luis Felipe Ruiz-García3https://orcid.org/0000-0003-1756-768XFacultad de Ciencias Veterinarias y Biológicas, Universidad Científica del Sur, Lima, PerúDepartamento de Salud Animal y Salud Pública, Facultad de Medicina Veterinaria, Universidad Nacional Mayor de San Marcos, Lima, PerúFacultad de Ciencias Veterinarias y Biológicas, Universidad Científica del Sur, Lima, PerúDepartamento de Producción Animal, Facultad de Medicina Veterinaria, Universidad Nacional Mayor de San Marcos, Lima, PerúBackground: 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.https://www.openveterinaryjournal.com/OVJ-2022-03-042%20P.L.%20Rolando%20et%20al.pdfreproductive performancetemperature-humidity indexdairy cattleheat stress |
| spellingShingle | Paola Laura Rolando Rocio Silvia Sandoval-Monzón Milena Paola Montenegro Luis Felipe Ruiz-García Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru Open Veterinary Journal reproductive performance temperature-humidity index dairy cattle heat stress |
| title | Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru |
| title_full | Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru |
| title_fullStr | Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru |
| title_full_unstemmed | Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru |
| title_short | Temperature-humidity index and reproductive performance of dairy cattle farms in Lima, Peru |
| title_sort | temperature humidity index and reproductive performance of dairy cattle farms in lima peru |
| topic | reproductive performance temperature-humidity index dairy cattle heat stress |
| url | https://www.openveterinaryjournal.com/OVJ-2022-03-042%20P.L.%20Rolando%20et%20al.pdf |
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