Main Article Content


This study was conducted to investigate the effect of testosterone enanthate injection on some carcass traits and chemical characteristics of Karadi castrated lambs meat. Twenty seven male Karadi lambs (3-4 months of age) with an average live weight of (28.7±3.8 kg) were reared in sheep farm, research station, Faculty of Agriculture Sciences, University of Sulaimania and allocated randomly by weight to three groups (treatments) by the dosage of testosterone enanthate (6 lambs for each treatment): G1 were not injected (control), G2 were injected by 200 mg and G3 were injected by 400 mg (IM weekly). All groups animals were fed with the same concentrate diet (3% of body weight), barley straw provided ad libitum and water was free, all group lambs were castrated by rubber band two weeks before experiment begins. There were three periods of slaughter: 60 days from the beginning of the experiment, 90 days and 120 days, at the end of each period three lambs from each treatment were randomly chosen and weighted, then humanly slaughtered. Many measurements were taken such as hot and cold carcass weight, carcass length, carcass thorax circumference, rib eye area and fat thickness ,carcass cuts weight, non-carcass adipose tissue weight, edible organs and offal weight, also the chemical composition of Longissimus Dorsi muscle meat. From the results, it could be concluded that there were positive effects of testosterone enanthate injection, which was increasing of living body weight reflecting on hot and cold carcass weight increase with increasing age and period of treating with enanthate, that increase in carcass weight was related with increasing in weight of whole carcass cuts which was clearly noticed on second and third slaughtering period, and also that increase can be correlated with rib eye area which increase during the same periods , that means the gain in weight is a result of body lean gain due to testosterone enanthate injection. In addition, fat tail weight decrease may be explain as body energy turned to producing or synthesis lean instead of fat.


Karadi Lambs Meat Testosterone Enanthate Injection castration

Article Details

How to Cite
Mahmood, A. B., & Al-Obaidi, A. S. (2017). Effect of Testosterone Enanthate Injection on Some Carcass Traits and Chemical Characteristics of Castrated Karadi Lambs Meat. Basrah Journal of Agricultural Sciences, 30(1), 38–45.


  1. A.O.A.C. (1990). Official method of analysis.15th ed. Helrich, K. (Ed.) Pub. by Association of Official Analytical Chemists. Washington, D.C. 1230pp.
  2. Bartle, S.J.; Preston, R.L.; Brown, R.E. and Grant, R.J. (1992). Trenbolone acetate/estradiol combinations in feedlot steers: Dose–response and implant carrier effects. J. Anim. Sci., 70: 1326-1332.
  3. Duckett, S.K. and Andrae, J.G. (2001). Implant strategies in an integrated beef production system. J. Anim. Sci., 79(E. Suppl.): 110-117.
  4. Duncan, D.D. (1955). Multiple range and multiple F-test. Biometrics, 11: 1-42.
  5. Dunshea, F.R.; D’Souza, D.N., Pethick, D.W.; Harper, G.S. and Warner, R.D. (2005). Effects of dietary factors and other metabolic modifiers on quality and nutritional value of meat. Meat Sci.,71: 8- 38.
  6. Forrest, J.C.; Aberle, E.D.; Hedrick, H.B.; Judge, M.D. and Merkel, P.A. (1975). Principles of meat science. Freeman, W.H. and Company. San Francisco. 556pp.
  7. Giorgi, A.; Weatherby, R. and Murphy, P. (1999). Muscular strength, body composition and health responses to the use of testosterone enanthate: a double lind study. J. Sci. Med. Sports Medicine Australia, 2(4): 341-355.
  8. Grunfeld, C.; Kotler, D.; Dobs, A.; Glesby, M. and Bhasin, S.(2006). Oxandrolone in the treatment of HIV-associated weight loss in men: a randomized, double-blind, placebo-controlled study. J. Acquir. Immune. Defic. Syndr., 41(3): 304-314.
  9. Hassan, K.M. (2009). The effect of some feed additives on performance and some blood parameters of Karadi lambs. Ph. D. Thesis. Coll. Agriculture Univ. Sulaimania.156pp.
  10. Juma, K.H. and Alkass, J.E. (2000). Sheep in Iraq. ACSAD, Damascus, Syria. 232pp.
  11. MacVinish, L.J. and Galbraith, H. (1988). The effect of implantation of trenbolone acetate and oestradiol-17? in wether lambs at two initial live weights on concentrations of steroidal residues and blood glucose, urea and thyroid hormones. Anim. Prod., 47: 75-85.
  12. Mohammed, S.; Razzaque, M.; Malik, R. and Al-Khozam, N. (2009). Carcass composition of crossbred and straight bred lambs finished on a high concentrate diet. J. Nutr., 8(4): 345-348.
  13. Nazli, B.; Olak, H.; Aydin, A. and Hampikyan, H. (2005). The presence of some anabolic residues in meat and meat products sold in Üstanbul. Turk. J. Vet. Anim. Sci., 29: 691-699.
  14. Perry, T.C.; Fox, D.G. and Beermann, D. H. (1991). Effect of an implant of trenbolone acetate and estradiol on growth, feed efficiency, and carcass composition of Holstein and beef steers. J. Anim. Sci., 69: 4696-4702.
  15. Roeber, D.L.; Cannell, R.C.; Belk, K. E.; Miller, R.K.; Tatum, J. D. and Smith, G.C. (2000). Implant strategies during feeding: Impacton carcass grades and consumer acceptability. J. Anim. Sci., 78: 1867-1874.
  16. Sadek, A.I.; Ismail, H.M.; Sallam, H.N. and Salem, M. (1998). Survey of hormonal levels in meat and poultry sold in Alexandria, Egypt. Eastern. Mediterranean Health, 4(2): 234-239.
  17. SAS. (2004). Statistical analysis system, User's Guide. Statistical. Version 7th ed. SAS. Inst. Inc. Cary. N.C. USA. 73pp.
  18. Schroeder, E.; Vallejo, A. and Zheng, L., (2005). Six-week improvements in muscle mass and strength during androgen therapy in older men. J. Gerontola. Biol. Sci. Med. Sci., 60(12): 1586-1592.