The Lotek JSATS AMT – Juvenile Salmon Acoustic Telemetry System Acoustic Micro Transmitter – was developed to satisfy the research and regulatory requirements for monitoring juvenile salmon in the Columbia River Basin.
The transmitter’s small size and relatively long operational life permits tracking of sub-yearlings throughout their natural environment while minimizing impact upon them.
The Lotek JSATS AMT acoustic tag is compatible with JSATS receiving systems and utilizes a Binary Phase-Shift Keying (BPSK) coding system that allows for tens of thousands of unique IDs on a single acoustic frequency. Each transmission consists of an ID and check sum delivered in less than one millisecond, thereby minimizing the probability of mis-identification or interference from code collision.
Juvenile fish survival studies through hydro-electric projects, juvenile fish behavior in the vicinity of guidance structures, fish behavior in reaction to anthropogenic disturbance.
Getting ready for our reality mining experiment with @enekoasp in Mallorca with @RArlinghausFish @LeibnizIGB to track a full coastal food-web (350 individuals: invertebrates to big rays) at unprecedented spatial(m.)/temporal(s.) resolution with @LotekWireless positioning system pic.twitter.com/H7g2AxNfUO
— Josep Alos (@josep_alos) March 21, 2019
After 6 months, we have retrieved half of our telemetry @lotek array (+35 moorings anchors 30 kg each😂). No problems so far besides de hard work!💪300 fish HD positioning!🐟🐡The supercomputing center can not wait to touch to the data!😊@fishecology_ & @RArlinghausFish pic.twitter.com/quCuoTsK9E
— Josep Alos (@josep_alos) September 30, 2019
|Model||Weight (g)||Size (LxWxH)
|Expected life  (days)|
|2s interval||5s interval||10s interval||20s interval|
|L-AMT-1.416||0.28||10.7 x 5.4 x 3.1||10||25||48||87|
|L-AMT-1.421||0.32||11.1 x 5.5 x 3.7||15||38||72||131|
|L-AMT-1.527||0.47||12 x 6.5 x 3.7||27||66||126||229|
|L-AMT-5.1 B||0.6||13 x 7 x 5||39||95||180||327|
|L-AMT-5.2||1.1||16 x 7 x 7||81||189||341||568|
|L-AMT-8.2||3.5||23 x 9 x 9||218||508||914||1522|
|L-AMT-14-12||8.0||45 x 14 x 14||429||1009||1837||3114|
1. Calculated life represents expected or average life
Stated specifications may vary by +/- 5%
Prior to delivery, 100% of all transmitters are tested for adherence to dimensional and dry weight specifications.
Transmitter frequency: 416.7 kHz ± 0.05%
Transmitter power: +158 dB (re: 1 uPa @ 1 meter)
Pulse Repitition Interval (PRI): Factory configurable
– 1 second minimum / 1 second increment
Transmitter Label: Discernable 4-character code
representing the 16-bit tag ID code (0xFFFF)
ID Message encoding: 31-bits, BPSK, with format as follows:
1. 7-bit Barker code (ox72)
2. 16-bit tag ID code (0x0000 – 0xFFFF)
3. 8-bit cyclic redundancy check (CRC), (oxFF)
ID Message length: 744 microseconds
Number of possible tag ID codes: 65,536