Evaluation of productive parameters in fished pigs with different weights

Abstract

Research was conducted in the department of Itapúa, Paraguay. The objective was to evaluate productive parameters in the porcine line obtained from the crossing between Large White and Landrace, fished with different weights. The following was analyzed: live weight (LW), hot carcass weight (HCW), cold carcass weight (CCW), hot carcass yield (HCY), cold carcass yield (CCY) and depletion (D), as well as the weights of the thoracic (TVW) and abdominal viscera (AVW) from a total of 6,476 animals grouped in 21 batches, coming from six supplier farms incorporated to the integrated system of production. Each batch was formed by three categories classified by the hot carcass weight in: category one, until 73 kg; category two, from 73.1 to 79 kg, and category three, with more than 79 kg. Data were analyzed with R statistical software; through the Kolmogorov-Smirnov test it was verified the normality in the distribution of the observations. Then, measures of central tendency and dispersion were estimated, applying variance analysis with balanced incomplete block design and Tukey test as a post-hoc test. Significant differences were detected in terms of LW, HCW, CCW, standing out category three with the highest registers. As for the HCY and CCY, groups two and three were the ones with the best performance, with identical percentage of evaporation loss, after refrigeration; whereas, category one had the lowest performance in all the analyzed parameters. Two suppliers were characterized by the provision of animals with the highest average of LW; only one supplier provided lighter animals, although the HCY and CCY were higher. The viscera weight did not show significant differences among suppliers (p<0,05).