Electromagnetic Fields in the Ocean and Electroreceptive Fish
Abstract
This report considers the possibility of the detection of dipole fields by electrosensing fish. In particular, a skate(Raja clavata) which is sensitive to threshold electric fields of 1 microvolt/meter has been examined. The results indicate that skates detect electric dipole fields at short distances (approximately 100 m at f=0, 1, or 10 Hz and for dipole source current moments on the order of 60 A-m). A comparison between the electric dipole sensing capabilities of skates and artificial systems is also made. In general, it appears that the optimum single-element manmade sensing system is superior to the skate for purposes of long-range detection of narrowband, extremely low-frequency signals.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1976
- Accession Number
- ADA028927
Entities
People
- E. H. Satorius