Browsing by Author "Temur, C"

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The Effect of Immunization Against Lhrh on Body Growth and Carcass Characteristics in Karakas Ram Lambs
(Elsevier, 2002) Ülker, H; Gökdal, Ö; Temur, C; Budag, C; Oto, M; deAvila, DM; Reeves, JJ
The effects of immunization against luteinizing hormone releasing hormone (LHRH) on body growth and carcass characteristics in Karaka ram lambs were investigated using recombinant LHRH fusion proteins. Recombinant fusion proteins, ovalbumin-LHRH-7 and thioredoxin-LHRH-7, were produced using recombinant DNA technology and expressed in E. coli. The control group (C, n = 5) was injected with ovalbumin and thioredoxin recombinant protein mixture, the immunization group (1, n = 6) was injected with a ovalbumin-LHRH-7 and thioredoxin-LHRH-7 recombinant fusion protein mixture (anti-LHRH vaccine) and, ram lambs in the elastrator group (E, n = 5) were castrated using elastrator bands. Animals in each group were weaned at 17 weeks of age and injected (primary immunization) with either mixture at 18 weeks of age or castrated. The C and I groups received a booster immunization 8 weeks later (26 weeks of age). Animals were housed in groups, weighed every 2 weeks and slaughtered at 36 weeks of age. Carcass of slaughtered lambs were chilled for 24 h at +4 degreesC and evaluated for carcass characteristics. Immunization did not reduce growth rate and live body weights. Immunization and castration had no effect on carcass measurements and loin eye muscle area, hot and cold carcass weights, dressing percentage and wholesale cuts. Immunization against LHRH reduced testis weight and immunized animals had leaner carcasses than castrates. It was concluded that immunizing ram lambs against LHRH using new recombinant LHRH fusion proteins could be an alternative to physical castration to improve carcass quality in ram lamb production; however, further research is required to determine the effective immunization and slaughter age to improve carcass traits. Published by Elsevier Science B.V.
Growth, Feedlot Performance and Carcass Characteristics of Karakas and Crossbred Lambs (F1) (Ile De France X Akkaraman (G1) X Karakas) Under Rural Farm Conditions in Turkey
(South African Journal of Animal Sciences, 2004) Gökdal, Ö; Ülker, H; Karakus, F; Cengiz, F; Temur, C; Handil, H
In this study the possibilities of using the Ile de France x Akkaraman (G(1)) genotype (IDFAG(1)) in improving the growth performance and carcass characteristics of fat-tailed Karakas sheep raised in rural farm conditions in the Van Region of Eastern Anatolia, Turkey, were investigated. The aim was to obtain some preliminary results for future studies which will be designed to develop a genotype which has the ability to adapt to the region's conditions, has a high yield and quality meat, grows fast, has a high feed conversion ability and a thin fat tail. Growth and feedlot performances and carcass characteristics of Karakas (KAR) and crossbred (IDFAK) lambs obtained from the mating of IDFAG(1) rains with Karakas ewes were evaluated. A total of 97 KAR and IDFAK lambs reared under farm conditions was evaluated for growth characteristics. For the evaluation of feedlot performance and carcass characteristics, 10 KAR and seven IDFAK single-born male lambs wearied at two months of age were subjected to a finishing diet for 70 days and slaughtered. Least squares means of the weights of KAR and IDFAK lambs at birth and at six months were 3.2 +/- 0.08 and 3.5 +/- 0.08 kg and 29.6 +/- 1.24 and 30.2 +/- 1.41 kg, respectively. The means of untailed cold carcass weight and untailed dressing percentage of KAR and IDFAK lambs were 13.2 +/- 0.39 and 14.3 +/- 1.10 kg and 39.7 +/- 0.42 and 44.3 +/- 1.10%, respectively. Although feed efficiency and many carcass characteristics did not differ between groups, the carcasses of the IDFAK lambs contained a higher percentage of intramuscular fat that is desirable for consumers in Eastern Anatolia. Encouraging results have been obtained to suggest that IDFAG1 rams could be used to improve the productivity of Karakas sheep. Nevertheless, more detailed and larger scale experiments are needed to confirm the results on growth and carcass characteristics of crossbred lambs under different farm conditions.