Avaliação da dinâmica do peso como caráter de importância econômica dos vitelos da raça landim, africânder e suas cruzas da estação zootécnica da chobela

Abstract

This work was developed within the scope of the curricular internship carried out at the Directorate of Animal Sciences, lasting five months, where practical activities were developed in the area of ​​animal production, including the management of Landim breed poultry, cleaning and sanitizing facilities, sanitary control and support in reproduction techniques, such as artificial insemination. In parallel, a case study was conducted with the objective of evaluating weight as a trait of economic importance in calves of the Landim, Afrikaner and their crosses. The study was based on secondary data from registries, totaling 101 calves considering birth and weaning weight as well as the factors breed, sex, birth season and age of the cow. The data analysis was performed based on descriptive statistics (mean and standard deviation) and analysis of variance (ANOVA), with Tukey's test applied for comparison of means at the 5% significance level. The results showed variations in calf weight depending on the factors analyzed, highlighting differences between breeds, sexes, and birth seasons. In general, crossbred calves showed higher weaning weights, while males showed higher values ​​compared to females. The influence of the cow's age on productive performance was also observed. It is concluded that the internship provided the development of practical skills in the area of ​​animal production, while the case study allowed us to show that weight is a trait of high economic importance, being influenced by genetic and environmental factors