Electronic Devices for the Capture of Aquatic Invertebrates.

摘要

The commonly used equipment for collection of aquatic invertebrates leaves much to be desired with respect to the labor and time involved in its use. This study was directed toward the development of field samplers that would be simple to operate,take no extraneous material,and produce large quantities of organisms in a relatively short period of time. The basic principle of operation of these devices was the application of a stimulus that would affect a movement of a given organism or group or organisms to an area where they might be confined and brought to the surface. Light and electrical stimuli were chosen for the field study because of their versatility and relative effectiveness in evoking reactions from almost all aquatic organisms. The various light traps constructed proved to be very effective for the capture of many different aquatic organisms. Electrical stimulation was used to drive benthic organisms up into the water. Shocking pulses were also used to paralyze organisms attracted by light stimuli.