Estrés calórico y su relación con variables reproductivas en machos bovinos en la Amazonia Colombiana
Víctor Eduardo, Ríos Carmona | 2013-04
Was evaluated the effect of heat stress on reproductive performance of bulls in the Municipality of Florence - Caquetá, by applying objective indicator of risk of suffering heat stress - temperature and humidity index (THI). We performed a retrospective, taking weather data generated weather station Macagual CIMAZ experimental center at the University of Amazonia, collected between the period of 1977 to 2005, these data were applied formulas ITH calculations reported by Hahn (1999), Valtorta and Gallardo (1996), Kibler (2000); the results were correlated with bull semen evaluations belonging to Zebu breed group collected during the year 1998. It was determined during the study period, all the months of the year are on the alert scale of suffering heat stress (THI 71- 78) of LWSI (P ≤ 0.05). Being November, December, January and February are the months of greatest risk, in turn, represent the month of January increased risk and July the least risky. No statistically significant differences were found between the applied ITH (P ≤ 0.05). Moreover evidenced the influence of ITH on semen quality, and that as this increase were affected sperm parameters such as concentration, primary abnormalities and volume.