. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 542 L. G. WILLIAMS ET AL. 50 40 V) c o a V) 0) DC 30 20 10 0 L O 5% Balanus eburneus odor • 1% Balanus eburneus odor. % Mytilus edulis odor 10 FIGURE 2. Response of Urosalpinx cinerea to a mixture of Balanus ehurneus and Mynlus edulis odors, and plotted as a function of M. edulis stimulus dilution. Inverted triangles and dotted lines show the % response (± 1 standard deviation) predicted from the control experiment shown in Figure 1. Negative slope of lines fitted to data indicate that M. edulis inhibits chemotaxis t
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 542 L. G. WILLIAMS ET AL. 50 40 V) c o a V) 0) DC 30 20 10 0 L O 5% Balanus eburneus odor • 1% Balanus eburneus odor. % Mytilus edulis odor 10 FIGURE 2. Response of Urosalpinx cinerea to a mixture of Balanus ehurneus and Mynlus edulis odors, and plotted as a function of M. edulis stimulus dilution. Inverted triangles and dotted lines show the % response (± 1 standard deviation) predicted from the control experiment shown in Figure 1. Negative slope of lines fitted to data indicate that M. edulis inhibits chemotaxis to B eburneus. Sample size at each dilution of M. edulis odor ranged from n = 67 to n = 81. Adaptation experiment Chemotaxis of Urosalpinx cinerea was significantly associated with dilution of Semibalanus balanoides odor (P < ) as well as with prior exposure to barnacle odor (P < ). As hypothesized, pre-exposure to barnacle stimulus decreased the response of the snails, but only at the lower concentrations of barnacle odor (Fig. 4). Pre-exposure to 10% barnacle odor did not significantly affect response of the snails to either 10% barnacle odor or filtered sea water (, rheotaxis). Cross-adaptation experiments There was a highly significant (P < ), concentration dependent association between chemotaxis of snails to barnacle odor and their prior exposure to filtered sea water, or oyster, mussel, and barnacle odors. As anticipated in the foregoing adaptation experiments, chemotaxis to barnacle odor was least for snails exposed to filtered sea water. This generalization is true for snails responding to either 10% or 1% barnacle odor, the only difference being in magnitude of response (Fig. 5).. 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,
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
