Monitoring the Three-Dimensional Movement of Multi-Species Fish Assemblages in a Modeled Environment...

© 2012 Hydroacoustic Technology, Inc.

Tracey W. SteigHydroacoustic Technology, Inc.715 N.E. Northlake WaySeattle, WA 98105(206) [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

T. Steig AFS 2012 Presentation August 22, 2012

Acoustic Tag Study Location Steinhart Aquarium in San Francisco in 2007 Seattle Aquarium in Seattle in 2011

Acoustic Tag System HTI Model 290 Acoustic Tag Receiver HTI Model 795 Acoustic Tags

Study Results 3D Tracks and Position Densities Simultaneous Monitoring of Multi-Species Comparison of Species-Specific Behaviors

Presentation Outline

In 2007, at the Steinhart Aquarium in San Francisco, HTI

demonstrated real-time acoustic tag tracking of alligator gar.

The gar were fed herring which were implanted with acoustic

tags.

The 3D gar positions were shown in real-time on projected

screens near the tank. Animations were created of the 3D

results. For more information regarding this study, see this link:

http://www.htisonar.com/case-studies-alligator-gar.htm

Live Telemetry Demo at AFS 2007

http://www.htisonar.com/case-studies-alligator-gar.htm

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)


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.


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.


Summary Results


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.

Conclusions

Final Conclusion:

Science + Fish + Beer = 1 Fun Night in Seattle

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AFS 2012 Presentation by Tracey W. [email protected](206) 633-3383

Monitoring the Three-Dimensional Movement of Multi-Species Fish Assemblages in a Modeled Environment...

Technology

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