Avaliação de biotécnicas da reprodução animal sob o foco ambiental

Abstract

Increasing food production without compromising the environment is a global concern. Researchers in the beef production chain have been searching for technologies in an attempt to address this concern by developing research related to management, sanitation, food and reproduction. Reproductive biotechnologies are tools capable of contributing positively to this scenario. The objective of this study was to analyze the effect of the two main biotechnologies of animal reproduction, IATF and TETF on pregnancy rate, conception rate and fetal sexing in cattle and to verify if the use of these biotechnologies can favor the sustainability of this productive chain. Nelore cows were randomly assigned to two treatments: FTAI-Fixed-Time Artificial Insemination and ETFT-Embryo Transfer at Fixed Time. The experimental design was completely randomized and the variables were analyzed by the PROC procedure, using binomial distribution and identity binding function. The results showed that, despite the lower design and gestation rates achieved with the use of ETFT, this technique has merit from the point of view of environmental sustainability, since it allows the production of descendants of better genetic quality and presents higher results of gestation of sexes of males, which, knowingly, lead to a greater production of meat per hectare.