Fattening Performance and Carcass Characteristics of Akkaraman and Asaf x Akkaraman F1 Crossbred Lambs

Öz

The objective of study was to determine the fattening performance and carcass characteristics of Akkaraman and Assaf x Akkaraman (ASF x AK) F1 crossbred male lambs obtained by crossing Assaf rams with Akkaraman ewes under breeding conditions. While the initial live weights of Akkaraman and (ASF x AK) F1 crossbred lambs were 23.89 kg and 23.77 kg, their final live weights were 41.02 kg and 44.03 kg (p<0.01), respectively. In 70 days of intensive fattening, purebred and crossbred lambs gained 17.14 kg and 20.26 kg total live weight, respectively. The feed intake of both groups for 1 kg live weight gain was 4.70 kg and 4.15 kg, respectively. Crossbred F1 lambs had significantly greater withers height (p<0.01) and body length (p<0.01) than Akkaraman lambs at all stages of fattening. At finishing, (ASF x AK) F1 lambs had the highest body length, larger chest, and leg circumferences than Akkaraman lambs. Among the slaughter and carcass characteristics of Akkaraman and (ASF x AK) F1 lambs, slaughter weight, cold carcass weight, untailed cold carcass weight, left half carcass weight, dressing percentage and the area of Musculus longissimus dorsi were determined to be 39.22 kg and 44.34 kg (p<0.05), 19.60 kg and 21.40 kg (p<0.05), 15.86 kg and 19.22 kg (p<0.01), 7.20 kg and 9.41 kg (p<0.001), 50.04% and 48.28%, 12.49 cm2 and 14.24 cm2, respectively. Crossbred F1 lambs had statistically significantly higher values for head, foot, skin, testes and kidney+pelvic fat weights than pure lambs. The tail weights of purebred and crossbred F1 lambs were determined to be 3.74 and 2.18 kg, respectively (p<0.001). The crossbred F1 lambs were found to have a higher leg weight (3.48 kg vs. 2.92 kg, p<0.01), forearm weight (1.80 kg vs. 1.44 kg, p<0.01), and flank-chest weight (1.39 kg vs. 0.92 kg, p<0.01) compared to Akkaraman lambs. As a result, (ASF x AK) F1 crossbred lambs were found to have better fattening performance, slaughter and carcass characteristics than Akkaraman lambs.

Anahtar Kelimeler

• Crossbreeding
• Intensive fattening
• Lamb
• Slaughter
• Body measurement
• Carcass

Destekleyen Kurum

Van Yüzüncü Yıl Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Birimi

Etik Beyan

This research and all experimental procedures were carried out in accordance with ethical standards approved by Van Yüzüncü Yil University Animal Experiments Local Ethics Committee (Approval no: 2022/08/19).

Teşekkür

This project was supported by Van Yüzüncü Yil University Scientific Research Projects Coordination Unit with the project number of FDK-2022-10334.

Akkaraman ve Asaf x Akkaraman Melezi F1 Kuzularının Besi Performansı ve Karkas Özellikleri

Öz

Çalışmanın amacı, Asaf koçları ile Akkaraman koyunlarının yetiştirici koşullarında melezlenmesi ile elde edilen Akkaraman ve Asaf x Akkaraman (ASF x AK) F1 melezi erkek kuzuların besi performansı ve karkas özelliklerini belirlemektir. Akkaraman ve (ASF x AK) F1 melez kuzuların besi başı canlı ağırlıkları sırasıyla 23.89 kg ve 23.77 kg, besi sonu canlı ağırlıkları ise sırasıyla 41.02 kg ve 44.03 kg olarak bulunmuştur (p<0.01). Yetmiş günlük entansif besi sonunda saf ve melez kuzular sırasıyla 17.14 kg ve 20.26 kg toplam canlı ağırlık kazanmışlardır. Her iki grubun 1 kg canlı ağırlık artışı için yem tüketimi sırasıyla 4.70 kg ve 4.15 kg olarak belirlenmiştir. Melez F1 kuzuların, besi döneminin tüm aşamalarında cidago yüksekliği (p<0.01) ve vücut uzunluğu (p<0.01), Akkaraman kuzularına kıyasla önemli derecede daha yüksek bulunmuştur. Besi sonunda (ASF x AK) F1 kuzuları, Akkaraman kuzulara göre daha yüksek vücut uzunluğuna, daha büyük göğüs ve but çevrelerine sahip olmuştur. Akkaraman ve (ASF x AK) F1 kuzuların kesim ve karkas özelliklerinden kesimhane ağırlığı, soğuk karkas ağırlığı, kuyruksuz soğuk karkas ağırlığı, sol yarım karkas ağırlığı, karkas randımanı ve Musculus longissimus dorsi alanı sırasıyla 39.22 kg ve 44.34 kg (p<0.05), 19.60 kg ve 21.40 kg (p<0.05), 15.86 kg ve 19.22 kg (p<0.01), 7.20 kg ve 9.41 kg (p<0.001), %50.04 ve %48.28, 12.49 cm2 ve 14.24 cm2 olarak belirlenmiştir. Melez F1 kuzular, baş, ayak, post, testis ve böbrek+leğen yağ ağırlıkları bakımından Akkaraman kuzulardan istatistiksel olarak önemli derecede daha yüksek değerlere sahip olmuştur. Saf ve melez F1 kuzuların kuyruk ağırlığı sırasıyla 3.74 ve 2.18 kg olarak belirlenmiştir (p<0.001). Melez F1 kuzular, Akkaraman kuzulara kıyasla daha yüksek but ağırlığına (3.48 kg ve 2.92 kg, p<0.01), ön kol ağırlığına (1.80 kg ve 1.44 kg, p<0.01) ve etek ağırlığına (1.39 kg ve 0.92 kg, p<0.01) sahip olmuştur. Sonuç olarak, (ASF x AK) F1 melezi kuzuların Akkaraman kuzulara göre daha iyi besi performansı, kesim ve karkas özelliklerine sahip olduğu tespit edilmiştir.

Anahtar Kelimeler

• Melezleme
• Entansif besi
• Kuzu
• Kesim

Destekleyen Kurum

Van Yüzüncü Yıl Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Birimi

Etik Beyan

Bu araştırma ve tüm deneysel işlemler Van Yüzüncü Yıl Üniversitesi Hayvan Deneyleri Yerel Etik Kurulu’nun (Onay no: 2022/08/19) onayladığı etik standartlara uygun olarak yürütülmüştür.

Teşekkür

Projeye verdiği destekten dolayı Van Yüzüncü Yıl Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Birimi'ne teşekkür ederiz.

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