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Der Bau des Lautapparates vom Knurrenden Gurami (Trichopsis vittatus Cuvier & Valenciennes) (Anabantidae, Belontiidae)

Structure of the sound producing organ of the croaking Gourami (Trichopsis vittatus Cuvier & Valenciennes) (Anabantidae, Belontiidae)

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Summary

The sound producing organ ofTrichopsis vittatus consists of a very enlarged part of the M. adducor superficialis. It is found at the inside of the cleithrum, which is attached to the fourth and fifth pectoral fin ray by two tendons, thickened to elastic pads. These pads are situated above an elevation formed by the base of the second and third fin rays. In experiments it is demonstrated how the double-pulsed tone bursts are generated by the pads snapping over this elevation during the contraction of the sonic muscle. If the sonic muscle is cut, the sound production ceases. If one of the two tendons is cut, the former double-pulsed tone burst turns into a single-pulsed burst.

Zusammenfassung

Das lautbildende Organ vonTrichopsis vittatus besteht aus einem mächtig entwickelten Anteil des M. adductor superficialis an der Innenseite des Cleithrum, der mit zwei Sehnen am 5. und 6. Brustflossenstrahl ansetzt, welche zu elastischen Polstern verdickt sind. Diese Sehnenpolster liegen über einer Erhebung, welche durch die Basis des 2. und 3. Flossenstrahles gebildet wird. Ausschaltungsexperimente zeigen, daß die Sehnenpolster während der Kontraktion des Tonmuskels über die Erhebung schnellen. Schneidet man den Tonmuskel durch, so hört die Tonbildung auf. Schneidet man eine der beiden Sehnen durch, so wird der doppelimpulsige Tonstoß einimpulsig.

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Kratochvil, H. Der Bau des Lautapparates vom Knurrenden Gurami (Trichopsis vittatus Cuvier & Valenciennes) (Anabantidae, Belontiidae). Zoomorphologie 91, 91–99 (1978). https://doi.org/10.1007/BF00994156

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  • DOI: https://doi.org/10.1007/BF00994156

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