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Modification of predatory snail chemotaxis by substances in bivalve prey odors


, : Modification of predatory snail chemotaxis by substances in bivalve prey odors. Malacologia 27(2): 281-290

Effects of bivalve odors were tested on chemotactically stimulated movements in newly hatched predatory marine gastropods (Urosalpinx cinerea). Odors from Mytilus edulis (shown previously to contain chemosuppressant activity, Williams et al., 1983) go well as odors from Geukensia demissa, Mercenaria mercenaria, Mulinia lateralis, and Tagelus plebeius contained substances that suppress chemotactic responses of newly hatched snails to purified barnacle odors. In addition we: 1) demonstrated that mussel suppressants are molecules of less than 1000 Daltons, 2) showed suppression is by a non-competitive mechanism, 3) used laboratory chemicals identified as components of mussel odors and determined that ammonium ion enhances chemotactic responses to barnacle odor. The other components of mussel odor that could be identified with certainty did not affect snail responses to barnacle odor.

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