Fatores inerentes ao leilão que afetam o preço de venda do bezerro de corte

Abstract

The objective of this study was to determine and quantify the inherent factors auction that affect the selling price of beef calves. The data were collected in 148 auctions in the cities of Dois Vizinhos and Francisco Beltrao on the selling price (PV), location (L) and month (M) of the auction, genetic group (GG) and lot size (TL) average weight (PE) and sex (S) of animals. 4,312 lots corresponding to 48,588 animals weighing between 100 and 250 kg of January 2004 to December 2014 were observed were classified according to their characteristics in seven genetic groups. In lots B, C and Z, predominated animal breeds British, Continental and Zebu, respectively. While, for BC and BZ CZ groups were admitted their cross. Lots called XX were not genetically homogeneous. The values were deflated by the IGP-DI and met the parametric assumptions. The selling price was standardized by the yearly median, assuming that its value corresponds to 100%, and the other values varied in their function. Analyses were performed by developed functions and software packages R. Path analysis quantified the direct and indirect effects of the variables taken as explanatory of the selling price, then were carried out regression analyzes and Tukey test. Overall the direct effect of the average weight was the highest (0.7), followed by gender (0.38). The smaller direct effect was the genetic group (-0.075) and location (-0.04). There was growing exponential relationship between average weight of the lot and selling price, and decreasing ratio (-0.0003 percentage point per kilogram) between kg-1 price and average weight of the lot, where the males, in general, were 15.74% more valued than females. The cross between British x Zebu breeds was the most valued genetic group did not differ from the British (8.93 and 3.57%, respectively). And the market in November reached the highest bonus, followed by February (9.57 and 8.84%, respectively, always compared to median year). The selling price increases linearly 0.3284 percentage points for each animal plus in the lot. It was concluded that the average weight of the lot is the most important variable in the formation of the selling price, followed by the sex of the animals.