. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CRUSTACEAN PIGMENTARY EFFECTORS 279 dealing with a mixture of antagonistically-acting substances. Simply comparing SIR's or DPI's does not reveal relative concentrations. For example, an SIR of "4" does not necessarily mean there is twice as much hormone present in one fraction as in a second which evoked an SIR of "; Each of these experiments was performed twice. Assays for chromatophore activators were performed on three animals each, those for distal retinal pigment. 6 10 14 18 FRACTION NUMBER FIGURE
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CRUSTACEAN PIGMENTARY EFFECTORS 279 dealing with a mixture of antagonistically-acting substances. Simply comparing SIR's or DPI's does not reveal relative concentrations. For example, an SIR of "4" does not necessarily mean there is twice as much hormone present in one fraction as in a second which evoked an SIR of "; Each of these experiments was performed twice. Assays for chromatophore activators were performed on three animals each, those for distal retinal pigment. 6 10 14 18 FRACTION NUMBER FIGURE 1. The Standard Integrated Responses (SIR) of the melanophores of fiddler crabs and the erythrophores and leticophores of prawns evoked by the fractions obtained by passing extracts of prawn eyestalks through a column of Bio-Gel P-6; dots, melanin-dispersing responses; circles, red pigment-dispersing responses; circles half-filled on top, white pigment- dispersing responses; circles half-filled on left, red pigment-concentrating responses; circles half-filled on right, white pigment-concentrating responses. light adaptation on seven prawns each. Therefore, the averaged results in the fol- lowing figures for chromatophoric responses represent the mean for six specimens and for distal retinal pigment light adaptation a mean of 14 specimens. EXPERIMENTS AND RESULTS The object of the first set of experiments was to determine the elution profiles of chromatophorotropins from prawn eyestalks and abdominal nerve cords which had been passed through a column of Bio-Gel P-6 and to compare the responses obtained from assays of these partially purified substances with the chromatophoric. 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 (Wood
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
