Particle-Size Considerations for Magnetite-Based Magnetoreceptors

Abstract

The presence of a magnetic influence upon behavior now appears to be a fairly common trait among a wide variety of organisms, as outlined and discussed elsewhere in this vol- ume. In a broad manner, these behavioral responses can be grouped into two categories, the first of which involves the use of a relatively insensitive "compass" to obtain directional (north/south) information, and a more sensitive system involved in the "map" sense of vertebrates and the time cue of insects.