Fattening Performance, Slaughterig and Carcass Charactenstics of Karayaka and Border Leicester x Karayaka (Fı) Crossbred Male Lambs
2 A Ü. Ziraat Fakültesi, Zootekni Bölümü, ANKARA - In this study 7 Karayaka (KY) and 7 Border Leicester (BL) x Karayaka (KY) (F1) single male lambs weaned at 45 days of age were fed on concentrates ad libitum in order to determine their fattening performance and carcass characteristics. The animal material of the investigation was obtained from Gökhöyük state Farm (in Amasya). The experiment was conducted for 84 days.
Liveweights at the beginning and 84 th days of fattening period and average daily liveweight gain during whole fattening period for KY's were 16.63; 33.10 kg and 196.10 g; for BL X KY (F1) crosses' 20.04; 39.11 kg and 227.03 g respectively .There were statistically significant differences between groups at the beginning of the fattening (P<0.01) and 84 th day weights (P<0.05). Average daily concentrate intake and concentrate consumptions for per 1 kg liveweight gain of KY and BL X KY (F1 ) lambs were determined as 1.007 , 1.231 kg and 5.135, 5.422 kg respectively.
At the end of the fattening period, the slaughtering and carcass characteristics of the groups were determined as follows: Slaughter weights 33.30 and 39.58 kg; warm carcass weights 15.41 and 19.19 kg; cold carcass weights 14.95 and 18.63 kg; dressing percantages 44.95 and 46.97 %. There were statistically significant differences between groups for slaughter weights (P< 0.01). Warm and cold carcass weights (P< 0.05).
By the cutlet region analyses Iean, bone, subcutansous fat, inuamuscular fat and the remaining parts ratios of KY and BL X KY (F1) crosses were found as follows: 43.28, 50.00; 23.29, 20.04; 20.43, 18.21; 9.30, 8.16 and 3.70, 3.59 % respectively. The difference between groups for lean ratios was found statistically significant (P<0.05).
The results of this investigation indicated that BL X KY (F1) lambs were superior to KY lambs in fattening, slaughtering and carcass characteristics.
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