Reproductive and productive performance of cows of the Tabapuã breed

Abstract

The objective of this study was to evaluate the performance of 369 Tabapuã cows, from Copacabana farm, in Xambrê-PR, Brazil. Data was submitted to ANOVA, means assessed by the Duncan test, gestation rates and percentages by Chi square (p <0.05). 76.56% (369/482) of the cows presented age (μ + σ) of 6.80 + 2.93, and the gestation rate (TG) of the third service, the final TG and the service period varied with the age of cows (p <0.05). The TG of the first and second service, the final TG, the percentage of empty cows and the PS varied according to the number of calving of the cows (p <0.05). The average daily weight gain of calves, weaning weight and calf age varied with cow age (p <0.05). The total percentage of calves weaned and the percentage of males and females did not vary with the age of the cows (p> 0.05). It was concluded that: 1. the age of the cows influenced the TG of the third service, the final TG, the percentage of empty cows, the average daily gain of calves, weaning weight and calf age; 2. the number of births influenced the TG of the first and second services, the final TG, the percentage of calves weaned, the average daily weight gain of calves, calf weight and age; 3. the year of the last calving of the cows influenced the abortion rate, the TG of the first service, the final TG and the number of services / conception, the period of service, the average daily gain of calves, weaning weight and in the age of the calf, and 4. the sex of the calves influenced the average daily weight gain and the weaning weight.

Genetic and Environmental Influences on Birth Weight, Weaning Weight and Average Daily Gain of Holstein Calves in Syrian Coast Conditions

“…This result agreed with Obese et al (2013). In contrary, this result disagrees with a previous study (Vendruscolo et al, 2020;Abera et al, 2013;and Goyache et al 2003), they found males grow faster and have higher growth ability. In Contrary, Bayou et al (2015) didn't found any significant differences in weaning weights for both genders.…”