engleski

Longissimus muscle area in Simmental and Holstein veal calves and their crossbreeds

The object of this study was to determine longissimus muscle area (LMA) of different genotypes veal calves. For this purpose, 80 calves reared under identical feeding and handling conditions on the same farm were used. Study included two finale weight groups of calves (150-160 kg and 190-200 kg). Day before slaughter LMA was measured using Aquila vet (Pie Med.), placing meat probe between 12th and 13th rib on right side. From each animal two ultrasound images were taken. Carcass LMA was traced on transparent foil 24 hours post mortem and measured later with planimeter Robotron (Reiss Precision). Simmental calves had ultrasound LMA 36.51 cm2, Holstein 32.16 cm2 and crossbreds 33.51 cm2. Carcass LMA for Simmental calves was 40.32 cm2, Holstein 35.06 cm2 and crossbreeds 36.54 cm2. For both measures Simmental calves significantly differ from Holstein (P<0.001) and crossbreeds (P<0.05). Calves of finale weight 190-200 kg had 4.46 cm2 larger ultrasound LMA and 5.09 cm2 carcass LMA, different (P<0.0001) then 150-160 kg group of calves. Pearson correlation coefficient between ultrasound and carcass LMA for Simmental calves were 0.95, Holstein 0.92 and crossbreeds 0.88. Results of this study show significant influence of genotype on LMA and high correlation between ultrasound and planimeter measured LMA.

calves; longissimus muscle area; ultrasound

nije evidentirano