| dc.description.abstract | The success in any extensive raising program, requires from the qualify personnel the correct detection and identification of the different primarily and secondary signs of heat on cows. The objective of the actual study was to evaluate the efficiency of two heat detection methods, the (OV) Visual observation and (PEA) Patch Estrus alert in Mixed Charolais cows in between 51 and 60 months old, with a physical condition from 7,50 to 7,75 and open days from 66 to 68. The cows (n=60) were synchronized with two shoots of 25mg of PGFT2a, in intervals of 14 days and were assigned to two groups. To the group treated were marked with PEA in the highest part of the sacrum bone to measure the declaration grade on it. The visual detection of heat on the tested group and the treated group was done twice a day in the morning am and night pm for 30 minutes, the cows detected on heat were inseminated immediately. The percentage of global detection was 60% (36/60) resulting in a gestation percentage between the two methods of 38,3% (23/60). The interaction of the treatment comparing age, corporal condition and open days did not affect the percentage of heat detection (p>0.05)
The conclusion of the study show us that the application of the method (PEA) increases de detection of heat in about 16,6% as long as the Visual Method is | |
