. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PIGMENT ACTIVATORS IN BARNACLES 199 UJ o or 3 o J Q I LJ 0- OC O O ir i o. B 0 5 10 15 20 25 05 10 15 20 25 30 TIME IN MINUTES FIGURE 3. The relationship between the average stage of the red chromatophores of eyestalkless Palaemonetes and the time in minutes following the injection of (open circles) extract of nervous system of Balanus eburneus; (closed circles) extract of muscle of Balanus cburncns; and (open triangles) extract of eyestalks of Palaemonetes. To test for the presence of Palaemonetes red-dispersing substance f
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PIGMENT ACTIVATORS IN BARNACLES 199 UJ o or 3 o J Q I LJ 0- OC O O ir i o. B 0 5 10 15 20 25 05 10 15 20 25 30 TIME IN MINUTES FIGURE 3. The relationship between the average stage of the red chromatophores of eyestalkless Palaemonetes and the time in minutes following the injection of (open circles) extract of nervous system of Balanus eburneus; (closed circles) extract of muscle of Balanus cburncns; and (open triangles) extract of eyestalks of Palaemonetes. To test for the presence of Palaemonetes red-dispersing substance four experi- ments were conducted. For the first three experiments nervous system extracts of barnacles were prepared in the usual manner. Two types of control solutions were used; one was sea water and the other, an extract of supraesophageal ganglia of Palaemonetes, ten ganglia in cc. of sea water. The extract of supra- esophageal ganglia of Palaemonetes is known to produce dispersion of the red pigment of one-eyed Palaemonetes (Brown, Webb and Sandeen, 1952). In the fourth experiment three separate extracts of muscle of Balanus were used. Each of these extracts was assayed on a group of ten one-eyed Palaemonetes. The chromatophores were staged at 0, 15, 30, 60, 90, and 120 minutes in all except the third experiment in which the zero reading was omitted. Average values for each of the time intervals were determined for each extract. There were, therefore, three experiments of ten animals each, for each kind of extract. Since the results were qualitatively the same for these three trials the averages for the three were calculated. These average values were used to plot the curves which are shown in Figure 4. It can be seen in Figure 4 that UJ O i/l UJ <r o Q I bj Q- 0. O O cr I o. 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 r
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
