ショウジンガニ触角の化学受容

概要

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Frequency of beating of the antennual sense organ of the marine decapod crustacean Plagusia dentipes DE HAAN was found to change in response to food stimulations applied directly to it or to the dactylopodite of the second walking leg. The first antenna bifurcates into inner and outer flagella having long sensory hairs (800-1000μ) near the ends. On the outer flagellum the small intermediate segments have short (500-800μ), thickly grown sensory hairs. The long sensory hairs responded to mechanical stimulition such as water currents in deodorized perfusion solutions with high frequency impulses (time course: 2-3msec, amplitude: 100-200μV, maximum frequency: 45Hz). The short hairs responded to chemosensory stimulation by food extracts (from Caranx, Scomber, Solea and Venerups) or chemical substances (Isobutyl aldehyde, Trimethylamine Oxide, Eugenol, Glycine and Betaine). The response to chemosensory stimulation appeared as high frequency spikes (80-120Hz) with a smaller amplitude (40-60μV) than the spikes of the mechanoreceptor hairs. The chemosensory hairs of the antennal sense organ may be the first to receive chemical information determining feeding behavior in water.
1973-03-15