1. Bleckmann, H.: J. Comp. Physiol. 140, 163 (1980)
2. Bleckmann, H., Waldner, L., Schwartz, E.: ibid. 143, 485 (1981)
3. Flock, A.: Acta Otolaryngol. (Stockh) 199, 1 (1965); Görner, P., in: Sound Reception in Fish, p. 171 (Schuijf, A., Hawkins, A.D., eds.). Amsterdam: Elsevier 1976; Kroese, A.B.A., Zalm. J.M. van der, Bercken, J. van den: Pflügers Arch. 375, 167 (1978)
4. Lang, H.H.: Behav. Ecol. Sociobiol. 6, 233 (1980)
5. McGlone, F.P., Russell, I.J., Sand, O.: J. Exp. Biol. 83, 123 (1979); Russell, I.J., Sellick, P.M.: J. Physiol. 257, 245 (1976); Sand, O.: J. Comp. Physiol. 102, 27 (1975)