. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 262 J. R. GREGG, J. J. MAcISAAC AND M. A. PARKER 40 80 120 160 FIGURE 6. Rates of lactic acid production by anaerobic homogenates. Clutch Solid line, R. pipicns, broken line, hybrids. Substrate, glycogen. Abscissa, standard age in hours, 18° C. Ordinate, lactic acid per embryo per hour, 24° C. explicitly by Figure 9, and is implicit in the data of Figure 8 and Figure 11. Simi- lar results were reported by A. I. Cohen (1954). Glycogen A total of six clutches of homogenized R. pipicus embryos have
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 262 J. R. GREGG, J. J. MAcISAAC AND M. A. PARKER 40 80 120 160 FIGURE 6. Rates of lactic acid production by anaerobic homogenates. Clutch Solid line, R. pipicns, broken line, hybrids. Substrate, glycogen. Abscissa, standard age in hours, 18° C. Ordinate, lactic acid per embryo per hour, 24° C. explicitly by Figure 9, and is implicit in the data of Figure 8 and Figure 11. Simi- lar results were reported by A. I. Cohen (1954). Glycogen A total of six clutches of homogenized R. pipicus embryos have been system- atically assayed to establish the relation between age and glycolytic activity in the presence of exogenous glycogen. The results are collected in Figure 4. The de- velopmental patterns of glycolysis exhibited are variable, especially those of homoge- nates from embryos younger than 80 to 90 hours (standard age). Perhaps the best generalization that the data will support is that the glycolytic rate falls off dur- ing the transition from fertilized egg to tailbud embryo, and then rises again during the remainder of pre-hatching development. The variability exhibited probably is not an artifact of the experimental procedures to which the homogenates were subjected, but more likely is due to uncontrollable non-uniformity in the prepara- tion of homogenates or to intrinsic variability in the clutches themselves. Embryos of two of these clutches were controls for hybrid embryos, with which they are compared in Figures 5 and 6. Clearly, the subnormal glycolytic rates of intact hybrids (L. G. Earth, 1946; Gregg, 1962) are not characteristic of their ho- mogenates. It appears, therefore, that they have a normal complement of the en-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological La
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
