Performance of Pre-weaning Javanese Thin-Tail Lambs under Semi-Intensive Management at Different Age and Sex

Abstract

The study was conducted to determine growth traits of thin tail pre-weaning lambs that produced in semi intensive management system. 61 animals (30 ewes and 31 lambs) were used in this study that located at Jonggol Animal Science Teaching and Research, Faculty of Animal Science, Bogor Agricultural University. Birth weights (BW), average daily gain (ADG) and weaning weight (WW) of lambs were affected by sex and ewes age. The highest of BW lambs was obtained from 2-year-age ewes (2,316±349 g), but ADG and WW of lambs from 3-year-age of ewes were highest than others (85.1±32 g/day and 7,385±2,351 g, respectively). BW of female was higher than male lambs (2,264±438 g and 2,149±716 g) but ADG and WW of male (80±24 g/day and 6,969±2,078 g) was higher than female lambs (69±26 g and 6,469±1,788 g). The WW was significantly (P<0,01) correlated by BW and ADG with r value were 0.67 and 0,96 respectively.