ASSESSMENT OF REPRODUCTIVE PERFORMANCE OF BLACK BENGAL GOAT IN VILLAGE CONDITION

Abstract

The Black Bengal goat is one of the potential genetic resources in our country. This present study was compiled to investigate the reproductive performance of Black Bengal goat in village condition at Saver Upazilla under the Dhaka district from July/2017 to June/2018. All goats of this study was rearing under extensive conditions. Least-squares means for body weight at birth for 1 st , 2 nd and 3 rd parity were 0.92±0.01, 0.99±0.01 and 0.97±0.01 kg respectively. Parity of dam at birth weight of Black Bengal goat has significant effect (p<0.05). The body weight at birth of Black Bengal goat for winter, summer and rainy season were 0.92±0.01, 0.99±0.1 and 0.97±0.01 kg respectively. Season of birth has significant (p<0.05) effect on the birth weight. Non-significant effect of parity of dam on body weight at weaning age of Black Bengal goat. The body weight of Black Bengal goat at weaning period were 5.12±0.06, 5.03±0.05 and 4.97±0.06 kg respectively at 1 ii

st , 2 nd and 3 rd parity. The body weight at weaning were 4.89±0.05, 5.27±0.05 and 4.93±0.09 kg respectively at winter, summer and rainy season. There are significant (p<0.05) effect of season on body weight at weaning of black Bengal goat. Parity of dam has highly significant (p<0.01) effect on litter size at birth of Black Bengal goat. The litter size of Black Bengal goat at birth were 1.21±0.06, 2.07±0.08 and 2.43±0.12 respectively at 1 st , 2 nd and 3 rd parity. The litter size of Black Bengal goat at birth were 1.83±0.09, 1.80±0.09 and 1.75±0.14 respectively at winter, summer and rainy season. Although there is significant effect of parity on litter size but there is no significant effect of season on litter size at birth. Highly significant effect (p<0.01) of parity on litter size at weaning of Black Bengal goat. The litter size at weaning were 1.18±0.05, 1.56±0.06 and 1.91±0.12 respectively at 1 st , 2 nd and 3 rd parity. Season at birth of Black Bengal goat has significant (p<0.05) effect on litter size at weaning. The litter size at weaning were 1.60±0.08, 1.40±0.07 and 1.30±0.08 respectively at winter, summer and rainy season. Non-significant effect of parity of dam and season of birth on gestation period of Black Bengal goat. The gestation period of black Bengal goat at 1 st , 2 nd and 3 parity were 144.1±0.43. 143.5±0.40 and 144.1±0.48 days respectively and at winter, summer and rainy season were 143.9±0.37, 143.9±0.41 and 143.6±0.59 days respectively. It is concluded that third parity and summer season was better performance under extensive rearing system in village condition.