[Changes in body weight and respiration rate in loach embryos]

Changes in the raw and dry weight of the intact eggs and isolated embryos of the loach, as well as in the respiration rate have been followed from 3.5 (64 blastomeres) till 46 hrs of development (prior to hatching). The raw weight of the intact eggs was shown to decrease somewhat. The dry weight of the isolated embryos increases twice. The respiration rate of the embryos increases 6.3 times. The intensity of respiration translated per dry and raw weight of the embryos increases as well. The protein content increases more than thrice.