Abstract
The turning responses of clawed toads (Xenopus laevis) to surface waves were examined in animals with an intact lateral line or with different combinations of lateral lines reversibly inactivated by CoCl2. The responses were characterized with respect to response frequency, turning accuracy, turning side, response time, and swim distance. After the inactivation most animals still responded to surface waves but the responses were different from those of animals with an intact lateral line. They also differed according to the combination of inactivated lines. In all experiments the responses for stimuli in some sectors of the surface did not differ from controls. The location of these sectors co-varied with the position of the intact lines, i.e., normal responses were found for frontal stimulus directions when head lines were intact and for caudolateral stimulus directions when trunk lines were intact. Their size was larger when lines on both sides of the body were intact and smaller when only lines on one side were intact. When the number of functional lines was reduced to one or two on one side of the body the turning angles shown within the sector of normal responses were maintained for stimulus directions outside these sectors. These results can be interpreted as indicating that head and trunk lines represent different “position values”. When only a single line was functional the toads still turned towards the stimulus source more often than by chance.
It is hypothesized that Xenopus uses two mechanisms to determine the direction of surface waves. One uses the position values of head and trunk lines; this mechanism is comparable to the “place value” postulated for individual head neuromasts of surface feeding fish. The other uses the information encoded in the activity pattern that is elicited in one line when the surface wave travels over the line. This second mechanism yields information about stimulus side but not about stimulus angle.
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References
Bleckmann H (1980) Reaction time and stimulus frequency in prey localization in the surface-feeding fish Aplocheilus lineatus. J Comp Physiol 140: 163–172
Bleckmann H, Tittel G, Blühbaum-Gronau E (1989) The lateral line system in surface feeding fish: anatomy, physiology and behavior. In: Coombs S, Görner P, Münz H (eds) The mechanosensory lateral line. Springer, New York Berlin Heidelberg, pp 501–526
Buschmann HP (1984) Untersuchungen zur Entfernungslokalisation beim Krallenfrosch Xenopus laevis D. Thesis, Universität Bielefeld
Carr C, Konishi M (1988) Axonal delay lines for time measurement in the owl's brainstem. Proc Natl Acad Sci, USA 85: 8311–8315
Claas B (1993) Wie analysiert das Seitenliniensystem die Laufrichtung von Oberflächenwellen? Habil Thesis, Universität Bielefeld
Claas B, Münz H, Görner P (1993) Reaction to surface waves by Xenopus laevis Daudin. Are sensory systems other than the lateral line involved? J Comp Physiol A 172: 759–765
Elepfandt A (1982) Accuracy of taxis response to water wave localization in the clawed toad (Xenopus laevis) with intact or with lesioned lateral line system. J Comp Physiol 148: 535–545
Elepfandt A (1984) The role of the ventral lateral line organs in water wave localization in the clawed toad (Xenopus laevis). J Comp Physiol A 154: 773–780
Elepfandt A (1989) Wave analysis by amphibians. In: Coombs S, Görner P, Münz H (eds) The mechanosensory lateral line. Springer, New York Berlin Heidelberg, pp 527–541
Frigge M, Hoagland DC, Iglewicz B (1989) Some implementations of the boxplot. Am Statist 43: 50–54
Görner P (1973) The importance of the lateral line system for the perception of surface waves in the claw toad Xenopus laevis Daudin. Experientia 29: 295–296
Görner P (1976) Source localization with labyrinth and lateral line in the clawed toad (Xenopus laevis). In: Schuijf A, Hawkins AD (eds) Sound reception in fish. Elsevier, New York, pp 171–183
Görner P, Mohr C (1989) Stimulus localization in Xenopus: Role of directional sensitivity of lateral line stitches. In: Coombs S, Görner P, Münz H (eds) The mechanosensory lateral line. Springer, New York Berlin Heidelberg, pp 543–560
Görner P, Moller P, Weber W (1984) Lateral-line input and stimulus localization in the African clawed toad Xenopus sp. J Exp Biol 108: 315–328
Hubel DH, Wiesel TN (1962) Receptive fields, binocular interaction and functional architecture in the cat's visual cortex. J Physiol (Lond) 160: 106–154
Karlsen HE, Sand O (1987) Selective and reversible blocking of the lateral line in freshwater fish. J Exp Biol 133: 249–262
Kramer G (1933) Untersuchungen über die Sinnesleistungen und das Orientierungsverhalten von Xenopus laevis Daud. Zool Jb Physiol 52: 629–676
Manley GA, Köppl C, Konishi M (1988) A neural map of interaural intensity differences in the brain stem of the barn owl. J Neurosci 8: 2665–2676
Mohr C (1993) Innervationsmuster des Seitenliniensystems des Krallenfrosches Xenopus laevis und die funktionelle Bedeutung der Neuromastenanzahl in einer physiologischen Einheit. Thesis, Universität Bielefeld
Müller U, Schwartz E (1982) Influence of single neuromasts in prey localizing behavior of surface feeding fish, Aplocheilus lineatus. J Comp Physiol 149: 399–408
Münz H (1985) Die Epidermal- und Kanalneuromasten des Seitenliniensystems der Knochenfische. Eine vergleichende Betrachtung. Habil Thesis, Universität Bielefeld
Nieuwkoop PD, Faber J (1967) Normal table of Xenopus laevis (Daudin). North Holland Publ Company, Amsterdam
Rudolph P (1967) Zum Ortungsverhalten von Gyrinus substraticus Steph. (Taumelkäfer). Z Vergl Physiol 50: 341–361
Sachs L (1972) Statistische Auswertmethoden. 3rd ed. Springer, New York Berlin Heidelberg
Shelton DMJ (1970) The lateral line system at metamorphosis in Xenopus laevis (Daudin). J Embryol Exp Morphol 24: 511–534
STATGRAPHICS (1991) Reference Manual Vers. 5. STSC Inc. Rockville Maryland
Tittel G, Müller U, Schwartz E (1984) Determination of stimulus direction by the topminnow Aplocheilus lineatus. In: Varju D, Schnitzler HU (eds) Localization and Orientation in biology and engineering. Springer, New York Berlin Heidelberg, pp 69–72
Will U, Luhede G, Görner P (1985) The octavo-lateralis area in Xenopus laevis. I. The afferent projections. Cell Tissue Res 239: 147–161
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Claas, B., Münz, H. Analysis of surface wave direction by the lateral line system of Xenopus: Source localization before and after inactivation of different parts of the lateral line. J Comp Physiol A 178, 253–268 (1996). https://doi.org/10.1007/BF00188167
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DOI: https://doi.org/10.1007/BF00188167