. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CHEMORECEPTION IN NASSARIUS 119 and 40%, respectively, whereas at concentrations of only 25, 50, and 100 ml., Solution A-lactate induced responses of 42%, 60%, and 55%-, respectively, and Solution A-betaine induced responses of 20%, 43%, and 47%, respectively. The Solution A-lactate combination was seemingly more effective than the Solution A-betaine combination; however, a Potency Probit Analysis showed that neither of the latter combinations was significantly less effective than the Solution A- 90 80- LU co Q. CO 60
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CHEMORECEPTION IN NASSARIUS 119 and 40%, respectively, whereas at concentrations of only 25, 50, and 100 ml., Solution A-lactate induced responses of 42%, 60%, and 55%-, respectively, and Solution A-betaine induced responses of 20%, 43%, and 47%, respectively. The Solution A-lactate combination was seemingly more effective than the Solution A-betaine combination; however, a Potency Probit Analysis showed that neither of the latter combinations was significantly less effective than the Solution A- 90 80- LU co Q. CO 60 LU * 50H Z 4CH UJ 030^ UJ 10-. -60 UJ to z o CL CO -50 CO O Q: Q_ -40 10 50 100 200 500 DOSE (Ml/40ml test solution) IOOO 20OO FIGURE 3. Results of bioassays of certain compounds identified in shrimp extracts. Per cent response (left ordinate) and probit response (right ordinate) are plotted as a function of dose (abscissa-log™ scale). The experimental dosage-response values are indicated by symbols; numbers next to symbols indicate numbers of snails tested. Regression lines were drawn from computed effective dose values obtained by Potency Probit Analysis. No regression line was computed for results obtained with betaine. The potencies (and 95% confid. lims.) given below were computed with respect to the potency of Solution A-betaine-lactate: Upper lim. Glycine-betaine-lactate Potency Lower lim. Lactate Glycine Betaine Upper lim. Potency Lower lim. Upper lim. Potency Lower lim. Not computed betaine-lactate combination. Nevertheless, the difference in the calculated potencies of Solution A-betaine-lactate and Solution A-betaine (no lactate) was nearly sig- nificant; the upper and lower 95% confidence limits were and , respec- tively (see Table VII). During the bioassays this difference seemed very real and it was felt that the combination which excluded lactate was less effective than either So
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
