Eficiência da fita barimétrica na determinação do peso nas fêmeas bovinas da raça Landim, Brahman e suas cruzas exploradas na província de Maputo

Abstract

Determining the body weight of animals is important because it allows a more accurate assessment of information on aspects such as growth, nutritional status, administration of medicines in the right dose, animal health status, formation of homogeneous batches and fixing the sale price of animals. However, the economic scenario of many production units in the country, does not favor the acquisition of scales for weighing animals due to their high cost. Therefore, it becomes necessary to adopt a quick and low-cost indirect method that can estimate the body weight of animals. O The objective of this work was to evaluate the effectiveness of the barimetric tape in determining the weight of bovine, in relation to the scale and the ability of students and technicians to determine the weight visually. In this work, the body weights of 213 females of the breed were evaluated. Landim, Brahman and their crosses, from three farms in the province of Maputo, obtained based on the barimetric tape method, digital scales and determination of the weight of visual form. Eight final year students participated in determining weight by estimation. year of Veterinary Medicine and farm technicians. Performing a Qui-test square, with a significance level of 5% in order to show the proportion of the difference in average in the methods, the first being in relation to the tape scale and the second referring to visual determination scale, for the Landim breed cows (n=68), a proportion of (8.41% and 33.34%), for the Brahman breed (n=71), a proportion of (0.18% and 0.38%) and in crosses (n=12), a proportion of (9.05% and 30.27%) was observed. For heifers, of the Landim breed (n=43), a proportion of (5.83% and 29.21%) was observed and for their crosses (n=16), a proportion of (5.90% and 8.05%) was observed. Concludes that the tape is efficient in determining the weight of females of the Landim, Brahman and female breeds. crosses. However, in the dry season, they must be reduced in cows (8.41%, 9.05%) and heifers (5.83%, 5.90%). Also note that when it comes to estimation, the highest variations were from the students, a difference that varies from (29.21%-33.34%) compared to resident technicians, a difference that varies from (0.18%-8.05%), thus showing that the level of experience and degree of exposure contribute to obtaining weights close to the of the real value(TRADUÇÃO NOSSA)