The Influence of Artificially Removed Albumen of Egg on Hatching, Body Weight, and Internal Components Weight of Chick.
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概要
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The objective of this study was to examine the relation of egg components to hatching, body, and its components weight of chicks. Two strains, which were selected to high and low yolk-albumen ratio, were used in this study. The hen of each strain was classified into two groups according to the largest and smallest albumen weight. In each group, eight hens were sampled and 9-12 fertiled eggs per hen were collected. About 30% or 35% of predicted albumen weight of egg of the former group (experiment I) and about 20% or 25% of the latter group (experiment II) were removed from two-third of collected egg before incubation. Hatching time was observed from 20th day of incubation, and was represented a difference from 21th day (0-hour). The day-old chicks were weighed, slaughtered and some intra-peritoneal organs were also weighed. The egg component weights of fertiled egg were estimated from its egg weight and its hen's values. In both experiments, egg weight and ablumen weight of the low line were significantly larger than that of the high line, but the mean of yolk weight was smaller. The differences between controll and treated groups were not significant. The similar values of hatchability were obtained from the control groups of both lines and experiments. But, the hatchabilities of the treated groups were significantly decreased, and this trend was clearly for the high line. Moreover, it was observed that the more amount of removed albumen from egg was more declining tendency in both lines. Hatching time of the treated groups in the high line was slightly reduced, while the opposite trend was obseved in the low line. The chicks in treated groups of both lines and experiments were smaller than in control groups. The means of body weight at hatching were significantly different (6 to 12g in high line, 7 to 8 g in low line). These loss in weight was approximated to removed albumen weight.The measured organ weights were paralleled with body weight. The yolk sack weight of treated group in high line was not significantly decreased.
- 日本家禽学会の論文
日本家禽学会 | 論文
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