Browsing by Author "Gökdal, Ö"

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    Fattening performance, carcass and meat quality characteristics of Kivircik male lambs
    Gökdal, Ö; Atay, O; Eren, V; Demircioglu, SK
    The objective of this study was to determine the fattening performance and carcass and meat quality characteristics of Kivircik twin male lambs. Twelve lambs at approximately 5 months of age were subjected to a finishing diet for 60 days. Average live weight of lambs at the beginning and the end of the fattening were 23.14 +/- 0.84 and 39.0 +/- 1.01 kg, respectively. Daily live weight gain and feed conversion efficiency were found as 0.265 +/- 0.007 and 6.14 kg, respectively. Hot carcass weight, cold carcass weight, and dressing percentage were 19.6 +/- 0.6 and 18.9 +/- 0.6 kg and 48.1 +/- 0.3%, respectively. Kidney-pelvic fat weight, internal fat weight, and m. longissimus dorsi area were 0.117 +/- 0.023 and 0.364 +/- 0.041 kg and 15.26 +/- 0.70 cm(2), respectively. The percentages of leg, back loin, forearm, shoulder, neck, flank-chest, kidney-pelvic fat, and internal fat in carcasses of the lambs were found as 34.1 +/- 0.4%, 19.6 +/- 0.3%, 21.0 +/- 0.2%, 7.0 +/- 0.3%, 10.5 +/- 0.3%, 7.2 +/- 0.2%, 1.3 +/- 0.1%, and 1.8 +/- 0.1%, respectively. Averages water content, ash, protein content, and fat content of meat samples were 73.4%, 1.0%, 19.5% and 3.6%, respectively. pH and thiobarbituric acid reactive substances values of meat samples were 5.55 and 0.056 +/- 0.017. L*(lightness), a*(redness), and b*(yellowness) values were recorded as 43.87, 12.69, and 10.22, respectively. Thus, we conclude that fattening performance, carcass, and meat quality of Kivircik lambs are satisfactory levels than that of other native breeds.
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    The effects of immunological castration against GnRH with recombinant OL protein (Ovalbumin-LHRH-7) on carcass and meat quality characteristics, histological appearance of testes and pituitary gland in Kivircik male lambs
    Gökdal, Ö; Atay, O; Ülker, H; Kayaardi, S; Kanter, M; DeAvila, MD; Reeves, JJ
    The aims of the study were to investigate the effects of immunization against GnRH using OL protein (Ovalbumin-LHRH-7) on feedlot performance, carcass, meat quality and some reproductive traits in Kivircik ram lambs. Ram lambs in the immunization (I, n = 7) group were immunized against GnRH using OL protein and boosted 2 weeks later. Control (C, n = 7) group was not treated. The animals were kept at pasture for 6 weeks after the first immunization, subjected to a 70 day fattening program, and then slaughtered. Growth performance, various carcass and meat quality characteristics were not affected from the immunization. GnRH immunization induced GnRH antibody production, suppressed testosterone production and testicular growth (P<0.01). Testicular structure was negatively affected from the immunization, but not pituitary. These results suggest that immunization against GnRH with OL could be an alternative castration technique in ram lambs without negatively affecting carcass and meat quality characteristics. (C) 2010 The American Meat Science Association. Published by Elsevier Ltd. All rights reserved.