Efeito da temperatura ambiente no dia da inseminação sobre índices reprodutivos de matriz suína em região tropical

Abstract

Climate change and the imbalance of thermal variables are important and challenging concerns in animal production. Adverse climatic conditions can cause a reduction in the reproductive performance of all species, especially pigs, which are particularly sensitive when raised in tropical regions. Therefore, the knowledge about the influence of meteorological conditions in the physiology of these animals is crucial for the improvement of the production. The research aims to identify the ambient temperature in Triângulo Mineiro and Alto Paranaíba from september of 2013 to december of 2018 on the day of insemination and to study its effects on certain reproductive indexes of swine matrices in the tropical environment. Data from the meteorological station of the Instituto Nacional de Meteorologia (INMET) was used to determine the maximum and minimum temperatures on the day of the insemination of the matrices and the thermal amplitude was calculated. The zootechnical data was colected from the Agriness S2 software from a commercial farm. Finally, the association between the ambient temperature and the reproductive indexes of the swine breeders was analyzed. After monitoring and analyzing the statistical data, it was observed that the average maximum temperature on the day of sows insemination was higher in the group of pregnant sows compared to the group of non-pregnant sows. It was verified that the maximum, minimum temperatures and amplitude did not interfere in the pregnancy and calving of the sows.