Fisheries Acoustics Quarterly  A look at current fisheries technologies and their applications.
 In This Issue
From the President

New MobileTag Exclusively for Mobile Telemetry Studies

Mobile Hydroacoustic Survey Workshop Announced

SE Acoustics Consortium & FM Slide Demystified

Meet Cherylyn “Chez” Tunnicliffe

Recommended Publications

 Calendar of Events

The 6th World Fisheries Congress
7-11 May

Beyond Borders 2012 AFS WA-BC & SER NW/BC
15-18 May
Victoria BC

IAGLR 2012 – International Association for Great Lakes Research
13-17 May

Canada's 1st National Fish and Wildlife Conservation Congress
27-31 May

HydroVision International
17-20 July
Louisville, KY

2012 Mobile Hydroacoustic Survey Workshop
Co-Hosted by HTI & Utah DNR
26-28 June
Flaming Gorge, Dutch John, UT

142nd Annual Mtg of the AFS
19-23 August
Minneapolis, MN



Spring Greetings

From the President

Dr. John Ehrenberg, President
Dr. John Ehrenberg

Is it spring? Here in Seattle it’s hard to tell one season from the next; 40˚F and rain pretty much sums up three out of four seasons. But the Seattle drizzle provides a good backdrop for focusing on new product development, and the engineering group has much to show for it.

We start with the release of HTI’s newest software designed specifically for collecting and analyzing mobile biotelemetry data. In May, MobileTag launches as the only software application in the world that simultaneously detects and identifies tagged fish in near real-time while recording the boat's GPS positions. Researchers can view tag signals and GPS positions on a geo-referenced map or remotely configure and control any deployed HTI acoustic tag data logger unit from virtually anywhere. Aside from viewing real-time data at any time, results from a mobile survey can be quickly displayed and reviewed within the MobileTag application.

Also, expect to see new hardware arriving later this summer. Driven by requests from USGS, the new Model 300 Micro Data Logger is designed to assess fisheries presence/absence in one simplified application. Multiple units are able provide 2D and 3D tracking. It is proving to be an efficient tool for both fixed and mobile surveys with built-in WiFi and cell modem options for immediate data access.

We value our users group for their input and ideas and consider them all virtual members of our product development team. Together we will continue to provide innovation and improved tools for fisheries research. Thank you for your contributions and best of luck with your spring studies.


  New MobileTag: Exclusively for Mobile Telemetry Studies
MobileTag Acoustic Telemetry Software

MobileTag, HTI’s latest acoustic tag software, arrives this May. Designed entirely for mobile surveys, this unique software detects presence/absence while simultaneously identifying tagged fish. Using an omni or directional hydrophone, users can collect all their data signals without tag collisions. MobileTag works with all HTI Acoustic Tag Data Loggers. Beyond its mobile focus, MobileTag also includes time-saving advances such as recording GPS information that can be reviewed later within the application.

In addition to presence/absence detection, mobile surveys are commonly used to determine fish presence beyond and between wide-spread fixed station arrays. They are also used to identify locations where motionless transmitters have accumulated (e.g., predated or defecated). With the rise of mobile acoustic telemetry surveys around the world, HTI has continued to develop more efficient tools for mobile studies. 

MobileTag Software Features:

  • Provides presence/absence while simultaneously identifying tagged fish.
  • Immune to data collisions and false-positives.
  • Communicates directly with all HTI data loggers via WiFi or cell modem.
    (No need to wait until the end of the season to see your data.)
  • Ideal for complementing fixed-station telemetry and evaluating mortality between fixed arrays.
Additional details are at



  Mobile Hydroacoustic Survey Workshop Announced
Mobile Hydroacoustic Workshop in Dutch John, Utah

The biennial Hydroacoustic Survey Workshop, a forum to discuss and exchange ideas for monitoring fish populations using mobile survey hydroacoustic techniques, is now scheduled for June 26-28. This workshop focuses on challenges and advancements in the application of hydroacoustic mobile survey data collection and analysis techniques. In 2001 the workshop started as an informal user-community for HTI Model 241/244 Split-Beam System users, however, over the years its scope has broadened to include a number of other scientific echo sounding technologies. Anyone with an interest in active fisheries acoustics is welcome to attend.

Co-hosted by Pat Nealson of HTI and Ryan Mosley of the Utah Division of Wildlife Resources, the 2012 Workshop is the 6th in a continuing series of “Advanced Mobile Survey Hydroacoustic Techniques” gatherings. These workshops provide an informal 3 day forum to present research, discuss challenges, and brainstorm solutions. We will also conduct a few hands-on trials with equipment in the water, as well as do a little kokanee fishing and maybe even a little kokanee eating (for dinner the second evening after the workshop).

For more info, visit the website at or click for the official invite below.

Workshop Invitation



SE Acoustics Consortium & FM Slide Demystified

Improving Signal-to-Noise Performance in Hydroacoustic Monitoring Systems through the use of FM Slide (chirp) Signals

The first workshop for the Southeast Regional Acoustics Consortium (SEAC) kicked-off at Florida International University last month. Discussions covered active acoustics in US coastal environments from North Carolina to Texas and the US Caribbean. Topics included the latest tools for research organized around high-priority objectives and management drivers. HTI's Pat Nealson was honored to be a contributor. He conducted a live demo using a Model 241 Echo Sounder in the bay and presented details FM Slide for fisheries assessments.

If you missed the workshop, you're invited to watch Pat’s presentation below. To learn more about the SEAC, go to


Meet Cherylyn “Chez” Tunnicliffe  

HTI is proud to introduce you to Cherylyn, or
Tunnicliffe, fisheries biologist and overall
go-to-to-get-it-done team player.

Since 2004, Cherylyn (or Chez) has been involved in fish passage studies, toxicology, and habitat evaluation throughout the Pacific Northwest. She’s been a go-to fisheries biologist across the globe with experience conducting studies in the Irish Sea and Yangtze River. Her responsibilities at HTI include all aspects of acoustic tag and hydroacoustic evaluations of fish distributions, bypass effectiveness, behavior, and migrational characteristics at dams and in open rivers. Chez graduated in 2004 from the University of Wales, Aberystwyth with a Bsc(Hons) in Marine and Freshwater Biology. Here in the U.S., Chez has worked for Pacific Northwest National Laboratory and Washington Dept. of Fish and Wildlife. Since then, she’s been all over the U.S. conducting fisheries research with HTI, and can now be found spending her time split between eastern Washington and central California.

When not tracking fish, Chez might be found playing for and managing a hockey team, diving in different marine environments around the world, and many other adventure-seeking activities too numerous to note.

Chez in a helicopter.

Chez hiking a mountain.

Hi Chez!  Thanks for taking time to answer a couple questions – we know you are getting ready to head to a project and we appreciate your time.  So where are you from originally and where are you now?
I grew up in Warwickshire, England, famous for being Shakespeare's birthplace.  From there I went to the coastal town of Aberystwyth, Wales for university. These days, I officially live in Richland, WA, although with all the exciting field work we have going on this time of year, trying to pinpoint where I am can be a challenge.

What do you love about your work?

I love that we are working in a fast paced, diverse field. There are some constants from one project to the next, but you never know what environments you’ll be working in, the type of people you’ll meet, or the challenges you’ll be faced with. With each project, I have the opportunity to learn, push myself, and grow as a scientist. Working for a company that is always moving forward to develop new tools allows the biologists to provide answers to real world problems by revealing behaviours and trends in a unique way. It certainly keeps me on my toes and I couldn’t ask for anything better in a career.

Deep sea diving Chez.
What is something people would never guess is a part of life as a fisheries biologist?
I think that people are often surprised at how tech savvy we need to be in this field. There is an image people have when we say “fisheries biologist” and it usually involves waders. We certainly do our share of field work, but most of our time is actually spent with computers. We use a variety of software programs to process our raw data into meaningful results, and as computing evolves, we find ways to utilise what’s available by increasing efficiency and displaying data using advanced visualisation software.

What is your favorite fish and why?
This is a tough question for me – I have a confession: in my early career, I was focused on marine mammals, and didn’t really have a passion for a particular fish species. When I started working with fish, it was at a disease and diagnosis lab, so the focus was on samples, rather than a whole fish. The more I worked with fish, the more interested I became, especially with salmonids, but I mostly fell in love with the science of fisheries. Just over a year ago, off the coast of Kona, Hawai’i, I went on a night dive and encountered some manta rays. When they came within arm’s reach I got the exact same feeling I had the very first time I saw a dolphin. They are magical and I hope that one day I’ll have the opportunity to work with them, so I guess they are my new found favorite fish.

You never stay still for long! Time moves all too quickly at this time of the year as a fisheries biologists working with migrating smolts. Thanks for taking the time to introduce yourself, Chez.


Recommended Publications

Effectiveness of a Non-Physical Barrier on Route Entrainment of Migrating Juvenile Salmonids in the Sacramento-San Joaquin River Delta
Romine, J. G., USGS Columbia River Research Laboratory, Cook, USA
Perry, R. W., USGS Columbia River Research Laboratory, Cook, USA
Blake, A., USGS Pacific Southwest Area, Sacramento, USA
Johnston, S., Hydroacoustic Technology, Inc., Seattle, USA

Development of a Method for Estimating the Probability of Detecting Fish Through a Hydroacoustic Beam
T. W. Steig, P.A. Nealson, C.M. Sullivan, and J.E. Ehrenberg, Hydroacoustic Technology, Inc., Seattle, USA

Behavioral Results from Acoustically Tagged Fish Using Innovative Techniques for Analyzing Three-Dimensional Data
T.W. Steig and S. Johnston, Hydroacoustic Technology, Inc., Seattle, USA

Email the Editor for more information.


HTI on YouTube Connect on LinkedIn Fishy Tweets HTI on YouTube Connect on LinkedIn Fishy Tweets ~ All the best from all of us at HTI ~
Let's connect! Connect on LinkedIn Fishy Tweets HTI on YouTube Connect on LinkedIn Fishy Tweets


Advanced Tools for Fisheries Research