This study presents, for the first time, a comprehensive dataset that documents the range of inter- and intraspecific otolith variation in aplocheiloid killifish, based on a total of 86 individuals representing five extant species of Nothobranchius PETERS, 1868, from East Africa: the sympatric pairs N. rubripinnis SEEGERS, 1986 and N. ruudwildekampi COSTA, 2009 (Eastern Tanzania), and N. orthon...

The information coming from the vestibular otolith organs is important for the brain when reflexively making appropriate visual and spinal corrections to maintain balance. Symptoms related to failed balance control and navigation are commonly observed in astronauts returning from space. To investigate the effect of microgravity exposure on the otoliths, we studied the otolith-mediated responses...

..................................................................................................... 1 1.0 Introduction .................................................................................................... 2 2.0 Collection of otoliths ........................................................................................ 3 3.0 Otolith preparation and sectioning ...................

Otoliths are paired calcified structures in the inner ear of teleosts that function hearing and balance. In this study, use otolith morphometrics shape analysis were explored to delineate redfin species under genus Decapterus from Sulu Sea, Philippines, namely, kurroides, D. smithvanizi, tabl. Results showed mean shapes unique within (p < 0.001). The size-related (OW—otolith weight, OL—otoli...

The ability to keep track of where we are going as we navigate through our environment requires knowledge of our ongoing location and orientation. In response to passively applied motion, the otolith organs of the vestibular system encode changes in the velocity and direction of linear self-motion (i.e., heading). When self-motion is voluntarily generated, proprioceptive and motor efference cop...

Otolith shape analysis of Atlantic herring (Clupea harengus) in Norwegian waters shows significant differentiation among fjords and a latitudinal gradient along the coast where neighbouring populations are more similar to each other than to those sampled at larger distances. The otolith shape was obtained using quantitative shape analysis, the outlines were transformed with Wavelet and analysed...

The purpose of this study was to determine whether scale or otolith microstructures were more strongly related to fish growth. Scales and otoliths were sampled from 231 juvenile pink salmon (Oncorhynchus gorbuscha) collected from the marine waters of Southeast Alaska during two periods in 1993 and 1994. A computerized image analysis system was used to measure several periodic and non-periodic s...

Analysis of otolith strontium (Sr) or strontium-to-calcium (Sr:Ca) ratios provides a powerful tool to reconstruct the chronology of migration among salinity environments for diadromous salmonids. Although use of this method has been validated by examination of known individuals and translocation experiments, it has never been validated under controlled experimental conditions. In this study, in...

Wann-Nian Tzeng, Chou-En Wu and Yu-Tzu Wang (1998) Age of Pacific tarpon, Megalops cyprinoides, at estuarine arrival and growth during metamorphosis. Zoological Studies 37(3): 177-183. The age of Pacific tarpon, Megalops cyprinoides (Broussonet), at estuarine arrival was estimated by counting otolith growth increments from specimens collected in the Gongshytyan Brook estuary of northern Taiwan ...

The purpose of this study was to determine the effects of the semicircular canals and otolith organs on respiration in humans. On the basis of animal studies, we hypothesized that vestibular activation would elicit a vestibulorespiratory reflex. To test this hypothesis, respiratory measures, arterial blood pressure, and heart rate were measured during engagement of semicircular canals and/or ot...