Fig. 4. Concentration of glyceraldehyde 3-phosphate and lactate in embryos during normoxic development and after exposure to anoxia in developing and diapause II embryos. Open squares represent the normal pattern of metabolite concentration during normoxic development. Colored symbols represent embryos exposed to anoxia. 1 and 2 d.p.f. embryos were sampled at 0.5 and 1 day of anoxia. 4 d.p.f. embryos were sampled after 7, and 21 days of anoxia. 8, 16 and 32 d.p.f. embryos were sampled after 21 and 60 days of anoxia. Values are means ± s.e.m. (N=3).