title: Neuronal feedback between brain and inner ear for growth of otoliths in fish.
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.
authors.affiliation: Zoological Institute, University of Stuttgart-Hohenheim, Stuttgart, Germany.
authors.forename: R H
authors.initials: RH
authors.lastname: Anken
authors.forename: E
authors.initials: E
authors.lastname: Edelmann
authors.forename: H
authors.initials: H
authors.lastname: Rahmann
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D000880:Anthraquinones / Q000493:pharmacokinetics; D001522:Behavior, Animal; D002113:Calcification, Physiologic / Q000502:physiology*; D002118:Calcium / Q000493:pharmacokinetics*; D003532:Cyprinodontiformes / Q000033:anatomy & histology / Q000254:growth & development* / Q000378:metabolism; D010037:Otolithic Membrane / Q000033:anatomy & histology / Q000254:growth & development* / Q000378:metabolism*; D013550:Swimming; D014725:Vestibular Nerve / Q000033:anatomy & histology / Q000378:metabolism* / Q000601:surgery; D014722:Vestibule, Labyrinth / Q000033:anatomy & histology / Q000254:growth & development / Q000378:metabolism
chemical_list: D000880:Anthraquinones; C070804:alizarin complexone; D002118:Calcium