Browsing by Author "Ipek, Aydın"

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    The effect of live weight, male to female ratio and breeder age on reproduction performance in Japanese quails (Coturnix coturnix japonica)
    (South African Journal of Animal Sciences, 2004) Ipek, Aydın; Sahan, Ümran; Yılmaz, Bestami; Uludağ Üniversitesi/Ziraat Fakültesi/Zootekni Bölümü.; AAH-2966-2021; AAH-2551-2021; 56208332300; 6602128089; 57205611181
    This study was carried out to determine the effect of live weight, male to female ratio and breeder age on egg weight and the hatching characteristics in Japanese quails (Coturnix coturnix japonica). Female quails at the age of six weeks, were weighed individually and separated into three weight groups depending on their live weights. The groups were classified as light (170-200 g), medium (201-230 g) and heavy (> 230 g). The male quails to be mated with these groups were selected from the individuals with mean live weight of 200-220 g. Groups were placed in the pens at male : female ratios of 1: 1, 1:2, 1:3, 1:4 and 1:5. Egg weight was significantly lower in the light group compared with the eggs obtained from the females with medium and heavy live weight. Egg weight increased in accordance with increasing breeder age. Live weight, male to female ratio and breeder age had a significant effect on fertility and hatchability. Fertility increased with an increase in live weight. The highest fertility was found in the group with male to female ratios of 1:2 and 1:3. Fertility at the ages of 11-14 and 15-18 weeks was higher than those of 7-10 and 19-22 weeks of age.
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    Effects of egg weight on chick and organ development, growth and slaughter traits in pekin ducks
    (Uludağ Üniversitesi, 2017-08-11) Sözcü, Arda; Ipek, Aydın; Uludağ Üniversitesi/Veteriner Fakültesi.
    This study was carried out to determine the effects of increased egg weight of pekin ducks on organ development, chick quality, growth traits, slaughter and carcass yield. A total of 405 one day old Pekin ducklings that have been hatched from light, medium and heavy hatching eggs, were used in the experiment. Egg weight were classified as “light” (<75 g), “medium” (76-82 g) and “heavy” (>83 g) by weighing with ±0.1 precision one by one. The chick hatching weight and leg length were found to be the highest in chicks hatched from heavy eggs, with values of 47.4 g and 227.8 mm compared to the chicks hatched from light and medium eggs (P<0.05). At 42 d of age, the body weight of ducks hatched from heavy eggs was 3195.0 g, compared to the ducks hatched from light and medium eggs (2879.6 and 2897.9 g, P=0.001). Any significant differences observed for feed conversion rate and mortality among the experimental groups (P>0.05). Slaughter weight, carcass weight were also the highest for ducks hatched from heavy eggs (P=0.004). In conclusion, increased egg weight affected chick hatching weight and growing performance in Pekin ducks.