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Benthic species can remain stationary for days, making it difficult to deduce mortality from our typical data sets—depth, temperature, and light. The Benthic sPAT adds tilt to help measure activity (or inactivity) in order to help determine mortality. Like Wildlife Computers other pop-up satellite tags, sensors collect data during deployment and archive it onboard the tag. Then, on a pre-set date, the tag releases from its host animal, surfaces, and uploads a summary of the archived data to the Argos satellites. The Wildlife Computers Benthic sPAT tags work on species like halibut, sole, flounder, turbot, and rays.
Cost range
- Price available on request
Where to buy
Website
External Resources
Conservation Challenges
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Specifications
The Benthic sPAT is attached using a single-point tether that allows it to tilt over (knockdown) when the animal swims in a burst. While stationary, the tag is vertical and the accelerometer is reporting “upright” but when the animal swims, there is a change in acceleration that causes the tag to “knock down.” This
creates a very noticeable signal in just the Az accelerometer channel.
The user selects the threshold that qualifies a change in acceleration as a knockdown event. The user also selects a threshold definition of upright to determine the amount of time a tag spends upright versus tilted.
For each UTC day, one orientation message is generated that contains two-hour summary periods with the following information:
- Time upright
- Number of times the tag was knocked down
- Wet/dry summary
- Benthic sPATs can release on a date, interval, or if the tag detects it is at the surface and reading dry, indicating the tether has broken or has become detached from the fish.
AVAILABLE DATA PRODUCTS
- Wet (0-1) Archive
- Acceleration 3-Axis Archive
- Knockdowns Archive
- Argos Locations
- Orientation
| Dimensions | 118 mm (length) x 38 mm (diameter) |
| Weight in Air | 60 grams |
| Pressure Rating | 2000 m |
| Memory | 64 MB |
| Operating Frequency | 401.678 MHz |
| Operating Life | Up to 96 days |
| Sensors | Wet/Dry, Acceleration |
| Accelerometer Range | ± 2 g |
| Accelerometer Resolution | 4 mg |
| Accelerometer Accuracy | ± 0.15 g |
| Conductivity Operational Limits | 0.1 to 5 S/m |
| Optimal Storage Temperature Range (°C) | 0° C to 5° C |
| Communication | Via USB port using Wildlife Computers USB communications cable |
All text and specifications sourced from - https://wildlifecomputers.com/