Experimental manipulation of egg quality in chickens: influence of albumen and yolk on the size and body composition of near-term embryos in a precocial bird
Experimental manipulation of egg quality in chickens: influence of albumen and yolk on the size and body composition of near-term embryos in a precocial bird
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DOI：
10.1007/s003600050116
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发表时间：
1998-02-01
影响因子：
2
通讯作者：
Sotherland, PR
中科院分区：
文献类型：
--
作者：
Finkler, MS;Van Orman, JB;Sotherland, PR
禽蛋成分在决定孵化的大小和质量方面的重要性尚未得到充分的评价。在第一个实验中，用20%的蛋白和/或蛋黄来测定鸡蛋中的成分对近期胚胎的代谢和各种大小的测量，结果表明代谢率、干体质量和内脏质量在很大程度上与鸡蛋的组成无关。去除蛋白导致湿体质量减少，与体内和卵黄囊中的水分含量减少相对应，并缩短了胫骨长度。去除卵黄不会导致体重变化，但湿卵黄囊和干卵黄囊质量都会减少。在第二个实验中，去除其中任何一个卵子成分的15%会导致孵化质量的减少，与在整个近期胚胎中观察到的相似。蛋白作为蛋中水分的主要来源，是孵化大小的主要决定因素，并可能通过与大小相关的限制因素影响孵化成功。蛋黄含量的差异可能会影响作为营养补充的新生儿的质量，但似乎不会导致胚胎发育期间更多的组织形成。
The importance of avian egg components in the determination of hatchling size and quality has yet to be fully evaluated. In the first experiment, 20% of the albumen and/or the yolk chicken eggs to determine the component on metabolism and various size measures in near-term embryos, Results show that metabolic rate, dry body mass, and internal organ mass are largely independent of egg composition. Removal of albumen resulted in a decrease in wet body mass corresponding to decreases in water content in the body and the yolk sac, and decreased tibiotarsus length. Removal of yolk resulted in no change in body mass, but decreases in both wet and dry yolk sac mass. In a second experiment, removal of 15% of either egg component led to reductions in hatchling mass similar to those observed in whole near-term embryos. Albumen, as the primary source of water in the egg, is the primary determinant of hatchling size and may influence hatchling success through size-related limiting factors. Differences in yolk content may influence neonatal quality as a nutritional supplement, but seem not to result in greater tissue formation during embryonic development.