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The effects of short-term recombinant bovine somatotropin treatment on fattening performance, carcass composition and visceral organ weights in karayaka lambs in Turkey

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Abstract

Recombinant bovine somatotropin (bST) was administered s.c. to lambs for 6 weeks to evaluate its effects on fattening performance, carcass composition and visceral organ weights. Twenty male Karayaka lambs were injected with 250 mg bST every two weeks. Body weight, live weight gain, feed intake and feed conversion rate were not affected by treatment. Head, feet, skin, liver, spleen, kidneys, filled and empty gastrointestinal tract, penis, testis, pelvic fat and internal fat weights were similar for the two groups. Lung weight increased by 17.4% (P < 0.01) and weight of heart decreased 22.7% (P < 0.05) in bST treated lambs. The only carcass characteristics that were affected by bST administration were limb muscle which increased from 1331 g to 1417 g (P < 0.05), loin fat which decreased from 275 g to 174 g (P < 0.01), shoulder fat which decreased from 26 g to 13 g (P < 0.01) and total fat/final weight percentage which decreased from 9.8% to 7.6% (P < 0.05). The results of this study show that prolonged release formulation of bST treatment reduces fat tissue, but does not significantly affect fattening performance or weights of visceral organs, muscle and bone.

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Authors and Affiliations

  1. Department of Zootechnics, Faculty of Veterinary Medicine, Uludag University, 16059, Gorukle, Bursa, Turkey

    Faruk Balci & Abdülkadir Orman

  2. Uludag Universitesi Veteriner Facultesi, Zootekni Ana Bilim Dali, Gorukle Kampusu, 16059, Nilufer, Bursa, Turkey

    Faruk Balci

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  1. Faruk Balci
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  2. Abdülkadir Orman
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Correspondence to Faruk Balci.

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Balci, F., Orman, A. The effects of short-term recombinant bovine somatotropin treatment on fattening performance, carcass composition and visceral organ weights in karayaka lambs in Turkey. Trop Anim Health Prod 40, 255–260 (2008). https://doi.org/10.1007/s11250-007-9087-0

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  • DOI: https://doi.org/10.1007/s11250-007-9087-0

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