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Russian Journal of Marine Biology

, Volume 31, Issue 1, pp 28–35 | Cite as

Directional sensitivity of the Japanese scallop Mizuhopecten yessoensis and Swift scallop Chlamys swifti to water-borne vibrations

  • P. M. Zhadan
Physiological Ecology

Abstract

Behavioral experiments were conducted on two bivalve species—the Japanese scallop Mizuhopecten yessoensis and the Swift scallop Chlamys swifti—to elucidate the role of their abdominal sense organ (ASO) in directional sensitivity to water-borne vibrations. The thresholds were determined at 140 Hz. Both species displayed the highest sensitivity to vibrations, the source of which was placed above the animal (opposite to the left valve), rostro-dorsally to its vertical axis. Removal of the ASO led to loss of directional sensitivity and a considerable increase in the sound reaction threshold. Both species were sensitive to modulated ultrasonic vibrations in the range of 30–1000 Hz. This is proposed to be caused by modulated ultrasound effects, provoking weak oscillations of the shell valves at a modulation frequency.

Key words

behavior mollusks directional sensitivity mechanoreception abdominal sense organ 

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Copyright information

© MAIK “Nauka/Interperiodica” 2005

Authors and Affiliations

  • P. M. Zhadan
    • 1
  1. 1.Pacific Oceanological Institute, Far East DivisionRussian Academy of SciencesVladivostokRussia

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