Neuronal feedback between brain and inner ear for growth of otoliths in fish. |
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| Authors: | R H Anken E Edelmann H Rahmann |
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| Affiliation: | Zoological Institute, University of Stuttgart-Hohenheim, Stuttgart, Germany. |
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| Abstract: | Previous investigations revealed that fish inner ear otolith growth (concerning otolith size and calcium-incorporation) depends on the amplitude and the direction of gravity, suggesting the existence of a (negative) feedback mechanism. In search for the regulating unit, the vestibular nerve was unilaterally transected in neonate swordtail fish (Xiphophorus helleri) which were subsequently incubated in the calcium-tracer alizarin-complexone. Calcium incorporation ceased on the transected head sides, indicating that calcium uptake is neurally regulated. |
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