Identification of Morphometry and Carcass Composition of Local Sheep at Different Growth Rate

Abstract

Sheep fattening farms have been recently growing rapidly to produce better quality of sheep meat and fullfill consumer’s demand. Sheep fattening and breeding farms should be developed proportionally to obtain sustainable sheep flock in the market. Twelve male lambs (less than one year old) were selected based on their average daily gain (ADG), consisting into two groups: 6 fast growing (FG) and 6 slow growing (SG) sheep. Some morphometric parameters in body and head parts of sheep and their carcass production and composition were measured and compared between the groups. The results show that chest circumference, body height, body length, head length and muzzle, top and bottom neck circumferences of FG sheep were significantly higher than in SG sheep (P<0.05). This may indicate that the parameters can be used as sheep selection criteria for growth rate. For carcass study, FG and SG sheep groups produced similar carcass weight and percentage as well carcass composition including meat, bone and fat in weight and percentages (P>0.05). It is concluded that selection of fast growing sheep can be recommended by using some morphometric parameters. The selection would not also negatively affect the weight and percentage of carcass composition.

Usaha penggemukan domba semakin berkembang untuk memenuhi permintaan konsumen ter-hadap daging domba berkualitas. Namun demikian, bakalan domba muda yang akan digemukkan semakin hari semakin menurun kualitasnya dan sulit diperoleh. Kombinasi usaha penggemukan dan pembibitan domba harus dikembangkan secara proporsional agar usaha domba tersebut berja-lan secara berkelanjutan. Dua belas ekor domba lokal muda jantan hasil seleksi dari populasi domba berdasarkan pertambahan bobot badan harian dibagi menjadi dua kelompok yaitu domba tumbuh cepat (TC) dan domba tumbuh lambat (TL). Beberapa ukuran morfometrik bagian tubuh dan kepala serta produksi dan komposisi karkas diukur dan dibandingkan pada dua kelompok domba tersebut. Hasil penelitian menunjukkan bahwa parameter morfometrik berupa lingkar dada, panjang badan, tinggi badan, panjang kepala, lingkar moncong, leher atas dan leher bawah, nyata lebih tinggi pada domba TC daripada domba TL (P<0.05). Parameter tersebut dapat dijadikan indikator seleksi untuk pertumbuhan domba. Domba TC dan TL menghasilkan produksi dan komposisi karkas yang tidak berbeda nyata. Kesimpulan studi ini adalah seleksi domba untuk sifat kecepatan pertumbuhan me-lalui beberapa ukuran morfometrik domba dapat direkomendasikan. Seleksi tersebut tidak berdam-pak negatif terhadap berat dan persentase serta komposisi karkas yang dihasilkan