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Öğe Effect of clutch size on egg production in Japanese quails(Eugen Ulmer Gmbh Co, 2003) Erensayin, C; Camci, ÖIn the present experiment the effects of clutch size on egg production in Japanese quail (Coturnix coturnix japonica) was investigated. In total, 131 six weeks old female quails were kept in individual cages and daily egg productions and egg weights were recorded over a period of six months. At the end of the production period the analyzed phenotypic correlations between clutch numbers, clutch size, pause numbers, pause size, hen-day egg production and egg weight were calculated. The average age at first egg laid and the age at 50% egg production were determined as 45.2 +/- 0.64 and 74.5 +/- 0.89 days, respectively. Clutch lengths ranged between I and 34 days and percentage of clutches consisting of only one egg was 10.3% of whole clutches. In addition, clutch lengths with 1-5 eggs, 6-10 eggs, 11-15 eggs and >16 eggs amounted to 44.4%, 33.1%, 16.4% and 6.09%, respectively. During egg production it was observed that the majority of intervals between clutches (pauses) were one-day periods (70.4%). At the end of the experiment the mean numbers of clutches per hen were determined as 18.8 +/- 0.33 and the mean clutch length was determined as 7.69 +/- 0.17 days. The mean number of laying pauses was 18.4 +/- 0.38 and the mean pause length was 1.40 +/- 0.04 days. A significant negative correlation was determined between numbers of clutches and hen-day egg production of -0.438 (P < 0.01). This indicates that hen-day egg production is higher for lower numbers of clutches. Further significant correlations were calculated for egg weight and numbers of clutches (0.254; P < 0.01), clutch length (-0.303; P < 0.01), number of pauses (0.236; P < 0.01), hen-day egg production (-0.172; P < 0.05).Öğe Effect of stocking density during the early growth phase on fattening performance of Japanese quails (Coturnix coturnix japonica)(Eugen Ulmer Gmbh Co, 2004) Camci, Ö; Erensayin, CThis study was carried out in order to investigate the effect of three stocking density rates during the growth stage of Japanese quails on fattening performance. The experiment consisted of 2 phases, early growth stage (0-3 week) and fattening stage (4-6 week). After hatching, 540 chicks were subjected to three stocking densities (45, 60 and 90 cm 2 per chick) with there replications for 3 weeks. The experimental birds were fed with broiler starter crumbs during growth phase and broiler grower mash during fattening phase. Body weights and food intakes were recorded weekly. Mortality was recorded daily. At the end of experiment the following results were achieved: 1) mortality was not affected by stocking densities, 2) the increased stocking density per bird decreased body weight in either early growth or fattening phase, 3) the stocking density did not affect feed conversion ratio.Öğe Effects of the oviposition time on egg quality in quails(Eugen Ulmer Gmbh Co, 2002) Erensayin, C; Camci, ÖIn this experiment the effects of oviposition time on egg quality characteristics in Japanese quails were investigated (Coturnix coturnix japonica). The eggs collected at 8: 30, 12: 00 and 15: 00 were compared for egg weight, shape index, shell thickness, albumen index, yolk index, Haugh Unit and IQU (Internal Quality Unit). In conclusion, it was determined that oviposition time had no significant effect on egg quality characteristics.Öğe Relations between age at sexual maturity and some production characteristics in quails(Eugen Ulmer Gmbh Co, 2002) Camci, Ö; Erensayin, C; Aktan, SIn this research it was investigated relations between age at sexual maturity and some production characteristics in Japanese Quails (Coturnix coturnix japonica). Totally 14 female quails were randomly distributed into individual cages and were determined age at sexual maturity, weight at sexual maturity, hen-day egg production and total egg mass production at 24 weeks old, and egg weights. It was also investigated correlations between determined characteristics. In conclusion late sexual maturity caused high sexual maturity weight and lower total hen-day egg production; on the other hand early sexual maturity resulted with increased egg production without any change for egg weight.
