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A chemoreceptive function for the anterior dorsal fin in rocklings (Gaidropsarus and Ciliata: Teleostei: Gadidae): electrophysiological evidence

  • R. C. Peters (a1), G. W. Van Steenderen (a1) and K. Kotrschal (a2)
Extract

Gross activity recordings from the recurrent facial nerve were made in unrestrained specimens of Gaidropsarus and Ciliata by means of implanted silver-wire electrodes. Responses to tactile stimuli could be evoked almost anywhere on the skin. Application of the contents of the urinary bladders of other rocklings, water in which other rocklings were kept, and (diluted) human saliva to the anterior dorsal fin evoked strong responses. Responses to more elementary chemical stimuli like amino acids, salts, aldehydes, and acids, were much weaker or absent. The results favour a special chemoreceptive function of the vibratile anterior dorsal fin.

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References
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Bardach, J. E. & Atema, J., 1971. The sense of taste in fishes. In Handbook of Sensory Physiology, vol. 4, part 1 (ed. Beidler, L. M.), pp. 293336. Berlin: Springer.
Kotrschal, K., Whitear, M. & Adam, H., 1984. Morphology and histology of the anterior dorsal fin of Gaidropsarus mediterraneus (Pisces: Teleostei), a specialized sensory organ. Zoomorphology, 104, 365372.
Peters, R. C. & Evers, H. P., 1985. Frequency selectivity in the ampullary system of an elasmobranch fish (Scyliorhinus canicula). Journal of Experimental Biology, 118, 99109.
Thompson, R. F. & Patterson, M. M., 1973. Bioelectric Recording Techniques, part A. New York: Academic Press.
Whitear, M., 1971. Cell specialization and sensory function in fish epidermis. Journal of Zoology, 163, 237264.
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Journal of the Marine Biological Association of the United Kingdom
  • ISSN: 0025-3154
  • EISSN: 1469-7769
  • URL: /core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom
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