Revisão de literatura: controle e impacto das moscas-dos-chifres na bovinocultura e resistência genética dos bovinos

Abstract

The search for more productive animals is needed to meet the world's demand for food. The increase in the population density of horn flies parasitizing the animal leads to losses in production by decreasing the performance of economically important traits in beef production, such as weight gain and increase of infectious and contagious diseases. The objective of this literature review is to better understand the cattle resistance to the horn fly ectoparasite, which is one of the most detrimental to both animal health and system profitability. Emphasis is given to the genetic parameters and methods used to quantify cattle resistance to horn flies, which range from the use of visual scores, manual counting to more sophisticated and objective methods using computer programs and artificial intelligence. The purpose of quantifying flies in the animals is to be able to predict genotypes that are more resistant to the flies aiming genetic selection can be performed in order to obtain more resistant populations.