Electronic (fenceless) control of livestock.

During June and August 1992, we tested a new technology designed to exclude cattle from specific areas such as riparian zones. Technology consisted of an eartag worn by the animal that provides an audio warning and electrical stimulus to the ear as the animal approaches the zone of influence of a tr ansmitter. The transmitter emits a signal that narrowly defines the desired area of exclusion. Tests on cattle indicated that the technology is about 90 percent effective at excluding animals. This technology has been patente d, and the Forest Service is pursuing ways to develop the product for marke tability.