Universitat de Lleida
    • English
    • català
    • español
  • English 
    • English
    • català
    • español
  • Login
Repositori Obert UdL
View Item 
  •   DSpace Home
  • Recerca
  • Ciència Animal
  • Articles publicats (Ciència Animal)
  • View Item
  •   DSpace Home
  • Recerca
  • Ciència Animal
  • Articles publicats (Ciència Animal)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Climate factors affecting conception rate of high producing dairy cows in northeastern Spain

Thumbnail
View/Open
010885.pdf (132.4Kb)
Sol·licita una còpia
Issue date
2007
Author
García Ispierto, Irina
López Gatius, Fernando
Bech Sàbat, Gregori
Santolaria Blasco, Pilar
Yániz Pérez de Albéniz, Jesús
Nogareda, Carmina
De Rensis, F.
López-Béjar, M.
Impact


Web of Science logo    citations in Web of Science

Scopus logo    citations in Scopus

Google Scholar logo  Google Scholar
Share
Export to Mendeley
Metadata
Show full item record
Abstract
Summer heat stress is a main factor related to low conception rate in high producing dairy herds in warm areas worldwide. We assessed the impact of several climate variables on conception rate in high producing dairy cows in northeastern Spain by examining 10,964 inseminations. The temperature–humidity
index (THI) was compared with maximum temperature in terms of its efficiency at predicting conception rate. The following data were recorded for each animal: herd, lactation number, insemination number, insemination date, inseminating bull, and AI technician along with climate variables such as mean and maximum temperatures, rainfall, mean and maximum THI for individual time points Days 7 to 1 before insemination, the day of insemination and 1, 2 and 3 days after insemination. Averages were also established for the following periods: from 7 days before insemination to the insemination day, from 3 days before insemination to the insemination day and from the insemination day to 3 days postinsemination. Based on the odds ratios, the likelihood of conception rate increased significantly by factors of 1.48, 1.47, 1.5, and 1.1 for the respective maximum THI classes <70, 71–75, 76–80, and 81–85 only on Day 3 before AI, while on the insemination day, it increased by factors of 1.73, 1.53, 1.11, and 1.3 for the respective maximum THI classes <70, 71–75, 76–80, and 81–85. In a subsequent logistic regression excluding mean and maximum THI, the effectiveness of temperature at predicting conception rate was evaluated. Although high, the fit of the second logistic regression model was slightly lower than that of the full model (P = 0.88 versus P = 0.98, respectively) and the information provided by the THI model. The likelihood of conception rate increased significantly by factors of 1.5, 1.2, 1.0, 1.0 for the respective maximum temperature classes <20, 21–25, 26–30, 31–35 8C on Day 1 after AI. The choice of the THI or temperature to monitor the farm environment would have to depend on the particular farm and situation. In our study conditions, the use of maximum temperature alone gives a new point of view regarding the information provided by the THI variables.
URI
http://hdl.handle.net/10459.1/57769
DOI
https://doi.org/10.1016/j.theriogenology.2007.02.009
Is part of
Theriogenology, 2007, vol. 67, núm. 8, p. 1379-1385
Collections
  • Articles publicats (Ciència Animal) [420]
  • Articles publicats (Agrotecnio Center) [692]

Contact Us | Send Feedback | Legal Notice
© 2019 BiD. Universitat de Lleida
Metadades subjectes a
 

 

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

Statistics

View Usage Statistics

D'interès

Política institucional d'accés obertDiposita les teves publicacionsDiposita dades de recercaSuport a la recerca

Contact Us | Send Feedback | Legal Notice
© 2019 BiD. Universitat de Lleida
Metadades subjectes a