Browsing by Author "Denk, H."

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Effects of Lambing Season, Sex and Birth Type on Growth Performance in Norduz Lambs
(Elsevier Science Bv, 2007) Yilmaz, O.; Denk, H.; Bayram, D.
The aim of this study was to evaluate effects of two production systems (spring and winter), sex and birth type on growth performance in Norduz lambs. Data were collected using 103 and 140 lambs born during the winter and spring, respectively. Lambs born in the winter were heavier (P < 0.01) than those born in the spring at birth, 90 and 180 days of age by 0.5, 1.6 and 1.7 kg, respectively. Ram lambs were heavier (P < 0.01) than ewe lambs at birth, 90 and 180 days of age by 0.5, 1.0 and 2.3 kg, respectively, while lambs born as singles were heavier (P < 0.01) than lambs born as twins at birth, 90 and 180 days of age by 0.9, 1.6 and 2.3 kg, respectively. Lambs born in the winter recorded a higher (P < 0.01) pre-weaning ADG (15 g/day) than spring-bom lambs, while ram lambs recorded a higher (P < 0.01) pre-weaning ADG (11g/day) than ewe lambs. The effect of birth type was not significant on pre-weaning ADG. The influence of lambing season and sex were also not significant on post-weaning ADG. Lambs born as singles recorded a higher (P < 0.01) post-weaning ADG (16 g/day) than lambs born as twins. Results suggest the winter season to give rise to heavier lambs at weaning and post-weaning and suggest lambs born in different seasons to have distinctly different growth patterns. The data also confirm that the influence of sex and type of birth on growth to be very important and to be take into account sheep production. (c) 2005 Elsevier B.V. All rights reserved.
Growth Performance and Mortality in Hybrid Converter Turkeys Reared at High Altitude Region
(Scientific Issues Natl Centre Agrarian Sciences, 2011) Yilmaz, O.; Denk, H.; Kucuk, M.
This study was to evaluate growth performance and mortality in Hybrid Converter turkeys reared under intensive conditions at high altitude region. The present study was carried out at an altitude about 1725 metres above sea level. 5040 (mixed gender) for determination of survival rate and 340 (170 per gender) Hybrid Converter poults for growth performance were utilized in the study. The experiment was terminated at 105 day of age in female and 120 day of age in male poults. Hybrid Converter poults exhibit fast-growing traits, as was observed with the body weights of 9.644 and 12.7 kg at 105 d of age for female and male birds, respectively. Body weight of male poults was 16.094 kg at 120 d of age. The weights of the female and male turkeys did differ significantly (P<0.001). The highest coefficients of variation (CV) for body weight in female poults (9.50% at 75 d of age) and male poults (10.96 % at 15 d of age) were observed. In general, CV of body weights at growth period ranged from 8.12 to 16.69 %. The average mortality for Hybrid Converter poults was 4.25% at 120 d of age. The highest mortality (2.46%) was observed at 10-13 wk of age, while the lowest mortality (0.51%) was observed at 0-4 wk of age. The results of the experiment that growth performance of Hybrid Converter poults reared under intensive conditions at high altitude were within commercial standards. The highest mortality was observed at 10-13 wk of age, in which growth rate was also the highest, while the lowest mortality was observed at 0-4 wk of age, in which growth rate was the lowest.
Slaughter and Carcass Traits of Young Brown Swiss Bulls Raised in Semi-Intensive System
(Medwell online, 2009) Yilmaz, O.; Denk, H.
The study was carried out to investigate some slaughter and carcass traits of young Brown Swiss bulls raised under semi-intensive system. Young Brown Swiss bulls were slaughtered at 24 months of age. The average slaughter weight, hot carcass weight, chilling carcass weight, hot dressing percentage and chilling dressing percentage were 328.40, 183.44, 181.64 kg, 55.99 and 55.11%, respectively. Carcass length, chest depth, rump length, rump circumference, ann length and ann circumference were 151.52, 63.70, 70.22, 70.37, 59.80 cm and 52.57%, respectively. Correlation coefficients for slaughter characteristics and carcass measurements of young Brown Swiss bulls were obtained. In general, positive correlation coefficients were observed for slaughter characteristics. Positive correlation coefficients for slaughter characteristic were high and significant. Only correlations between heart weight with spleen weight and all slaughter traits with internal fat weight were negative and not significant. Significant negative correlation coefficients were found between rump length with chest depth, arm length with rump circumference, ann circumference with rump circumference, arm length with arm circumference from carcass measurements. Overall, the results of the present study suggest that young Brown Swiss bulls can be used in beef production in semi-intensive system and carcass evaluation on different slaughtering weights in different breeding systems can be recommend.