Hearing Thresholds, Frequency Discrimination, and Acoustic Orientation in the Lemon Shark, Negaprion Brevirostris (Poey)
Abstract:Laboratory experiments are described in which the hearing of young lemon sharks was investigated using several conditioning methods. Hearing-threshold curves were obtained by approach, arousal, and escape conditioning, and are presented in absolute decibels and in decibels relative to ambient noise. Limits of frequency discrimination are given which were based on experiments utilizing approach-avoidance and escape conditioning. Acoustic orientation in an approach-conditioned shark is described and mean orientation errors for several frequencies are given. Theories of hearing in fish are reviewed and comparisons are drawn between present results and those of previous studies. The significance of these results is discussed in the light of present acoustical concepts, such as pressure and displacement, and the near and far fields.
Document Type: Research Article
Publication date: 1967-09-01
More about this publication?
- The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- Ingenta Connect is not responsible for the content or availability of external websites