Summary
Electron microscopy shows that the electroreceptors of Protopterus dolloi (Dipnoi) and Calamoichthys calabaricus (Brachiopterygii) are very similar to the known ampullary electroreceptors of other primitive fish groups. With Protopterus, however, there is one difference: at the apical surface of the receptor cells, instead of a kinocilium, a club-shaped protrusion is found. The club-shaped protrusion has no fixed number nor a fixed arrangement of microtubules (Fig. 4).
The presynaptic ribbons are in direct contact with the presynaptic membrane, and may be invaginations of the presynaptic membrane (Fig. 3).
The functional significance of the kinocilium and of the club-shaped protrusion is discussed. Furthermore, a possible biological role of the ampullary electroreceptors in fish coming into frequent contact with the water surface (Dipnoi, Brachiopterygii) is considered.
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References
Barets, A., Szabo, T.: Appareil synaptic des cellules sensorielles de l'ampoule de Lorenzini chez la Torpille (Torpedo marmorata). J. Microscopie 1, 47–54 (1962)
Bennett, M.V.L.: Mechanisms of electroreception. In: Lateral line detectors (P. Cahn, ed.). Bloomington: Indiana Univ. Press 1967
Bennett, M.V.L.: Electroreception. In: Fish physiology, Vol. V, Sensory systems and electric organs. New York-London: Academic Press 1971
Cordier, R.: Les organes sensoriels cutanés du Protoptère. Bull. Acad. roy. Méd. Belg., Cl. d. Sci., V. ser. 22, 474–483 (1936)
Derbin, C.: Effets de la section du nerf latéral sur les jonctions sensorineurales des ampoules de Lorenzini de la Torpille, Torpedo marmorata. J. Microscopie 9, 119–126 (1970)
Derbin, C., Denizot, J.-P., Szabo, T.: Ultrastructure of the type B sense organ of the specific lateral line system of Gymnarchus niloticus. Z. Zellforsch. 98, 262–276 (1969)
Derbin, C., Szabo, T.: Ultrastructure de l'organe sensoriel de type A du système spécifique de la ligne latérale chez Gymnarchus niloticus, poisson électric à faible décharge. Micron 5, 57–77 (1974)
De Robertis, E.: Histophysiology of Synapses and Neurosecretion. In: International Series of monographs on pure and applied biology. Division: Modem trends in physiological sciences (P. Alexander and Z.M. Bacq, eds.), Vol. 20. London: Pergamon Press 1964
De Robertis, E., Franchi, C.M.: Electron microscope observations on synaptic vesicles in synapses of the retinal rods and cones. J. biophys. biochem. Cytol. 2, 307–318 (1956)
Dijkgraaf, S., Kalmijn, A.J.: Versuche zur biologischen Bedeutung der Lorenzinischen Ampullen bei den Elasmobranchiern. Z. vergl. Physiol. 53, 187–194 (1966)
Eakin, R.M., Westfall, J.A.: The development of photoreceptors in the stirnorgan of the treefrog, Hyla regilla. Embryologia (Nagoya) 6, 84–98 (1961)
Fahrenholz, C.: Über die „Drüsen” und die Sinnesorgane in der Haut des Lungenfisches. Z. mikr.anat. Forsch. 16, 55–74 (1929)
Flock, Å.: Electron microscopic and electrophysiological studies on the lateral line canal organ. Acta oto-laryng. (Stockh.), Suppl. 199 (1965)
Flock, Å.: Sensory transduction in hair cells. In: Handbook of sensory physiology, Vol. 1, pp. 397–441. Berlin-Heidelberg-New York: Springer 1971
Heiligenberg, W.: Electrolocation of objects in the electric fish Eigenmannia (Rhamphichthyidae, Gymnotoidei). J. comp. Physiol. 87, 137–164 (1973)
Jørgensen, J.M., Flock, Å., Wersäll, J.: The Lorenzinian ampullae of Polyodon spathula. Z. Zellforsch. 130, 362–377 (1972)
Kalmijn, A.J.: The detection of electric fields from inanimate and animate sources other that electric organs. Handbbok of sensory physiology, Vol. III, 3, pp. 147–200 (A. Fessard, ed.). Berlin-Heidelberg-New York: Springer 1974
Lissmann, H.W., Machin, K.E.: The mechanism of object location in Gymnarchus niloticus and similar fish. J. exp. Biol. 35, 451–486 (1958)
Mullinger, A.M.: The fine structure of ampullary electric receptors in Amiurus. Proc. roy. Soc. B 160, 345–359 (1964)
Murray, R.W.: The ampullae of Lorenzini. In: Handbook of sensory physiology, Vol. III, 3, pp. 125–146 (A. Fessard ed.). Berlin-Heidelberg-New York: Springer 1974
Nickel, E., Fuchs, S.: Organisation and ultrastructure of mechanoreceptors (Savi vesicles) in the elasmobranch Torpedo. J. Neurocytol. 3, 161–177 (1974)
Obara, S., Bennett, M.V.L.: Mode of operation of ampullae of Lorenzini of the skate, Raja. J. gen. Physiol. 60, 534–557 (1972)
Peters, R.C., Bretschneider, F.: Electric phenomena in the habitat of the catfish Ictalurus nebulosus, LeS. J. comp. Physiol. 81, 345–362 (1972)
Peters, R.C., Buwalda, R.J.A.: Frequency response of the electroreceptors (“small pit organs”) of the catfish, Ictalurus nebulosus, LeS. J. comp. Physiol. 79, 29–38 (1972)
Pfeiffer, W.: Die Fahrenholzschen Organe der Dipnoi und Brachiopterygii. Z. Zellforsch. 90, 127–147 (1968)
Roth, A.: Propriétés fonctionelles et morphologiques des différents organes de la ligne latérale des Mormyridés. J. Physiol. (Paris) 59, 486 (1967)
Roth, A.: Elektrische Sinnesorgane beim Zwergwels Ictalurus nebulosus (Amiurus nebulosus). Z. vergl. Physiol. 65, 368–388 (1969)
Roth, A.: Wozu dienen die Elektrorezeptoren der Welse? J. comp. Physiol. 79, 113–135 (1972)
Roth, A.: Electroreceptors in Brachiopterygii and Dipnoi. Naturwissenschaften 60, 106 (1973a)
Roth, A.: Ampullary electroreceptors in catfish: afferent fiber activity before and after removal of the sensory cells. J. comp. Physiol. 87, 259–275 (1973b)
Suga, N.: Electrosensitivity of specialized and ordinary lateral line organs of the electric fish Gymnotus carapo. In: Lateral line detectors (P. Cahn, ed.). Bloomington: Indiana Univ. Press 1967
Szabo, T.: Sense organs of the lateral line system in some electric fish of the Gymnotidae, Mormyridae and Gymnarchidae. J. Morph. 117, 229–249 (1965)
Szabo, T.: Ultrastructural evidence of a mechanoreceptor function of the ampullae of Lorenzini. J. Microscopie 14, 343–350 (1972)
Szabo, T.: Anatomy of the specialized lateral line organs of electroreception. In: Handbook of sensory physiology, Vol. III, 3, pp. 13–58 (A. Fessard, ed.). Berlin-Heidelberg-New York: Springer 1974
Szabo, T., Wersäll, J.: Ultrastructure of an electroreceptor (Mormyromast) in a morrayrid fish, Gnathonemus petersii. II. J. Ultrastruct. Res. 30, 473–490 (1970)
Wachtel, A.W., Szamier, R.B.: Special cutaneous receptor organs of fish. IV. Ampullary organs of the nonelectric catfish Kryptopterus. J. Morph. 128, 291–308 (1969)
Waltman, B.: Electrical properties and fine structure of the ampullary canals of Lorenzini. Acta physiol. scand. 66, Suppl. 264, 1–60 (1966)
Zimmermann, H., Altner, H.: Zur Charakterisierung neuronaler und gliöser Elemente im Epithel des Saccus vasculosus von Knochenfischen. Z. Zellforsch. 111, 106–126 (1970)
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Roth, A., Tscharntke, H. Ultrastructure of the ampullary electroreceptors in lungfish and brachiopterygii. Cell Tissue Res. 173, 95–108 (1976). https://doi.org/10.1007/BF00219268
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DOI: https://doi.org/10.1007/BF00219268