Summary
The spectrum of water-turbulence generated by Euphausia is dominated by the beat frequency (modulation 2–10 Hz) of pleopods. Records from sensory axons of the antennule nerve revealed a uniform value of particle velocity (0.006 cm/s) effective at threshold of sensory cell activity correlated to the vibratory stimulus(0.5–50 Hz). The characteristic floating posture behavior was calibrated by focussing water vibration onto the animals carapace. Water vibrations (70–150Hz) justabout eliciting the behavior showed a uniform value of particle acceleration (40 cm/s). A potential role of the two systems monitoring water displacement in intraspecific communication during schooling is discussed.
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Wiese, K., Marschall, H.P. (1990). Sensitivity to Vibration and Turbulence of Water in Context with Schooling in Antarctic Krill Euphausia Superba . In: Wiese, K., Krenz, WD., Tautz, J., Reichert, H., Mulloney, B. (eds) Frontiers in Crustacean Neurobiology. Advances in Life Sciences. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-5689-8_13
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