Hydroacoustic Technology, Inc. Tracey W. Steig Hydroacoustic Technology, Inc. 715 N.E. Northlake Way Seattle, WA 98105 (206) 633-3383 [email protected]Monitoring The Three-Dimensional Movement of Multi- Species Assemblages in a Modeled Environment Using Acoustic Tag Technology: Results from HTI’s 2011 at the Seattle Aquarium
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Monitoring the Three-Dimensional Movement of Multi-Species Fish Assemblages in a Modeled Environment Using Acoustic Tag Technology
Talk by senior fisheries scientist, Tracey Steig given at the 2012 American Fisheries Society (AFS) Annual Meeting in Minneapolis, MN. Acoustic telemetry data acquired and compiled from Fish Fest! 2011. In September 2011, HTI and the AFS Student Subchapter co-hosted Fish Fest! at the Seattle Aquarium in conjunction with the American Fisheries Society (AFS) Annual Conference in 2011. In addition to breaking attendance records, HTI acoustically tagged and 3D tracked coho salmon (Oncorhynchus kisutch), canary rockfish (Sebastes pinniger) and yellowtail rockfish (S. flavidus) with the Seattle Aquarium team. Together, they tracked fish behavior in real-time as they traveled throughout the mammoth 120,000 gallon Window on Washington Waters (WOWW) tank.
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The Seattle Aquarium Window on Washington Waters (WOWW) Tank includes large rock formations which serve as habitat for anemones, sea stars, urchins and coral.
This marine aquarium has inverted glass planes for viewing at two different locations and incorporates complex rock structures that made positioning acoustically-tagged fish in 3D challenging.
Aquatic EnvironmentWOWW Tank – Designed to replicate the seascape around Neah Bay on the NW tip of Washington State.
Capacity120,000 gallons
Size Roughly 20 ft by 40 ft by 20 ftNon symmetrical dimensions, complex monitoring environment
Species Tracked with Acoustic TagsCanary Rockfish (Sebastes pinniger)Yellowtail Rockfish (S. flavidus)Coho Salmon (Oncorhynchus kisutch)
Tag Parameters & Monitoring Duration~ 3 pulses/sec, 3 msec Encoded PW~ 3 hours of data collection (& partying)
T. Steig AFS 2012 Presentation August 22, 2012
Model 290 Acoustic Tag Receiver9 of 16 Channels Used
for Real-Time 3D Tracking Study
Acoustic Telemetry System
Hydrophonex 9
• Real-time 3D tracking, positioning and displaying.• No problems associated with tag signal collisions.• No problems associated with false positive ID tag codes.
T. Steig AFS 2012 Presentation August 22, 2012
Tags operate at 307 kHz and are fully programmable for pulse width, period, and activation.
Model 795 & 800 Acoustic Tags
0.5 gm, 15-20 d life
0.67 gm, 20-35 d life
1.4 gm, 40-50 d life
3.1 gm, 45-65 d life
13 gm, > 6 mo life
23 gm, > 3 yr life
3D positioning requires receiving the same transmitted signal on at least 4 hydrophones
Ideal hydrophone geometry has equal separation in X, Y, and Z planes (i.e. cube shaped hydrophone array)
Accurate hydrophone positions are required for accurate tag position estimate
Signal arrival time differencesare used to calculate the 3D position of the acoustic tag relative to the hydrophones
Z
Y
X
Standard 3-D Hydrophone Geometry
Ehrenberg, J.E. and T.W. Steig. 2003. Improved techniques for studying the temporal and spatial behavior of fish in a fixed location. ICES J of Mar. Sci, 60: 700-706.
Canary Rockfish – Seattle Aquarium
Yellowtail Rockfish – Seattle Aquarium
Coho Salmon – Seattle Aquarium
The Aquarium’s Wi-Fi was used to transmit the acoustic tag data. This provided real-time 3D fish positions which were displayed on screens, monitors, laptops and smart phones throughout the Aquarium.
T. Steig AFS 2012 Presentation August 22, 2012
Summary Results
T. Steig AFS 2012 Presentation August 22, 2012
Over 3,100 people came to HTI and AFS Student’s Fish Fest! event at the Seattle Aquarium in 2011.
Three species of fish were acoustically tagged and monitored in 3D in the 120,000 gallon marine WOWW Tank with the 3D position estimates displayed in real-time.
Examples of study results presented included: 3D Tracks and Position Densities Simultaneous Monitoring of Multi-Species Comparison of Species-Specific Behaviors
3D acoustic tag techniques are ideal for: Home Range Determinations Predator-Prey Interactions Bioenergetics Studies
Real-time acoustic tag studies provide a broad range of information in both marine and freshwater environments across large and small spatial scales.