. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RESPIRATORY RHYTHMS IN SINGLE EGGS 375 fertilization membrane, was removed shortly after the fertilization using a narrow pipette. From the lot first fertilized, 92 eggs in the 2-cell stage were selected, 44 without membrane and 48 with. From the second lot 92 eggs were isolated in the 2-cell stage, all without membrane. All 184 eggs were thoroughly mixed to- gether and introduced into a diver (gas space: ^1). The resulting respiration curve (7/7) is indicative of simple interference between two groups of eggs, each of w
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RESPIRATORY RHYTHMS IN SINGLE EGGS 375 fertilization membrane, was removed shortly after the fertilization using a narrow pipette. From the lot first fertilized, 92 eggs in the 2-cell stage were selected, 44 without membrane and 48 with. From the second lot 92 eggs were isolated in the 2-cell stage, all without membrane. All 184 eggs were thoroughly mixed to- gether and introduced into a diver (gas space: ^1). The resulting respiration curve (7/7) is indicative of simple interference between two groups of eggs, each of which shows respiratory cycling of about the magnitude shown in the typical curves of Figure 4. Thus, this experiment supplied no evidence of physiological ' 0. 0-0 2 0 0 hours FIGURE 5. Two deviating experiments (20/6, 24/6) on single Psammechinus miliaris eggs. One experiment (7/7) with 184 eggs fertilized in two separate lots (92 + 92 eggs) showing absence of physiological interaction between the two groups. interactions between two groups of cells which are much out of phase. In Figure 5 single and double arrows indicate the approximate division times of control eggs belonging to the two separate lots. The absolute respiration rates measured two hours 15 minutes after fertiliza- tion are given in Table I. The experiment 4/7 serves as base line for the experi- ments on 20/6 and 24/6. The base line for the experiment 7/7 is the 0-line. B. Ciona intestinalis. The diver used for these experiments looked much the same as the one used in A; however, all dimensions were slightly larger. VD. 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 Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl R
Size: 1735px × 1439px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
