The EMG Series Electromyogram Transmitters
- Overview
- Features
- Specifications
- Applications
Lotek's electromyogram
(EMG) transmitter represents one of the components of a field-proven
system which enables researchers to record physiological data from free-swimming
fish. Designed to be mounted either externally or internally, EMG transmitters
measure muscle activity using probes inserted into the musculature of
the fish. The EMG Series provides you with a powerful quantitative estimate
of the energetic costs associated with physical activity. It is the
only transmitter that truly indicates mortality.
- investigate the metabolic costs associated with such activities as tail-beat frequency
- calibrate to oxygen consumption through a series of measurements taken during periods of controlled activity
- calculate and compare the energetic costs of various activities
- transmit temperature data
| Dimensions (mm) |
Weight
in Air (g) |
Weight
in Water (g) |
Typical
Operational Life (months) |
| 16.2 x 53.0 | 18.3 | 8.0 | 3-4 |
Transmitter operational life varies based in part, upon environmental conditions to which they are subjected. For this reason, typical values for operational life may be specified, with guaranteed operational life defined as 90% of the typical value. All transmitters are guaranteed to meet stated specifications upon shipment. Any Lotek transmitter found to be defective, with respect to material, workmanship or guaranteed operational life, effective from date of receipt, will be repaired or replaced. Owing to variable beat rate characteristics, operational life of temperature and other sensor transmitters is limited to typical values.
Radio telemetry has been used to obtain relative or qualitative estimates of fish activity, for the most part, through the use of mercury switches. The EMG transmitter, in conjunction with the SRX_400 receiver/datalogger and peripherals, offers an incomparable means of quantitatively addressing activity and energy budget issues both in the lab and in the field, without the need for mercury switches.
Applications include:
- assessing velocity barriers such as those presented in natural points of difficult passage, or man made barriers including culverts, bridges, dams, etc.
- assessing the effect of temperature or chemical plumes
- designing bypass structures by examining in-situ energy expenditures of fish in response to flow rate changes and structural design changes in ladders, weirs, etc., and
- effectively monitoring and assessing entrainment in-situ through use of the EMG/SRX_400 system on a continuous basis.
