. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SNAIL CHEMOTAXIS TO COMPETING ODORS 543 TABLE I Contingency table summarizing the effects o^Crassostrea virginica odor (CVO) on chemotaxis of Urosalpinx cinerea to each of 4 concentrations o^Balanus eburneus odor (BEO) Exp. BEO (%) CVO (%) Response N % Response Overall-G 1 1 1 1 95 10 95 10 29 37 63 44 66 61 94 66 44 61 67 67 71 43 45 44 < 2 2 2 2 30 27 40 28 42 63 88 63 4 4 4 4 21 25 18 9 49 71 74 62 43 35 24 15 < Stimulu
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SNAIL CHEMOTAXIS TO COMPETING ODORS 543 TABLE I Contingency table summarizing the effects o^Crassostrea virginica odor (CVO) on chemotaxis of Urosalpinx cinerea to each of 4 concentrations o^Balanus eburneus odor (BEO) Exp. BEO (%) CVO (%) Response N % Response Overall-G 1 1 1 1 95 10 95 10 29 37 63 44 66 61 94 66 44 61 67 67 71 43 45 44 < 2 2 2 2 30 27 40 28 42 63 88 63 4 4 4 4 21 25 18 9 49 71 74 62 43 35 24 15 < Stimulus strength is expressed as a percentage of the volume of stimulus water in the total volume of stimulus solution. Tests for significance of association between chemotaxis and strength of oyster odor are summarized as Overall-G for each concentration of barnacle odor. Snails pre-exposed to oyster or mussel odors showed greater response to barnacle odor than those pre-exposed to barnacle odor, but showed a lower response than those pre-exposed to filtered sea water. 0) <n o 0) tr 100 80 60 40 20 O Semibalanus balanoides odor D Semibalanus balanoides & Crassostrea virginica odors V Crassostrea virginica odor D LV i_. 0. 10 % Stimulus Dilution 100 FIGURE 3. Response of Urosalpinx cinerea to dilutions of mussel or oyster odor, or to a mixture of the two. Lines fitted by least squares regression of % response on log of stimulus dilution. Zero (, control) values were omitted from the regression because such values are incompatible with the loga- rithmic transformation. Sample size for the various data points ranged from n = 61 to n = 71 (Semibalanus balanoides), n = 67 to n = 73 (Crassostrea virginica), and n = 55 to n = 68 (S. balanoides + C. virginica).. 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 wor
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
