Acoustic tagging is one of the most powerful marine conservation technologies currently available. REEF uses this technology in both the Grouper Moon Project and the Invasive Lionfish Program to help determine movement, ranges, behavior, and more. But tags and receivers are expensive! We need your help in furthering REEF's valuable marine conservation initiatives by supporting the purchase and implementation of these valuable tools. You can donate securely online at www.REEF.org/contribute. Read on to learn more about these high-tech tools.
What is an acoustic tag, hydrophone, and array? Acoustic tags are small electronic devices that, once secured to a fish, broadcast their identification by ultrasonic sound. Hydrophones that can detect these ultrasonic sounds are placed underwater via a buoy to record the presence or absence of fish. A group of hydrophones strategically placed in an area is called an array. Data from the array are periodically downloaded and analyzed to determine fish movement, residency, behavior, and more.
How do tagging studies make a difference for marine conservation?
- Allows researchers to determine home ranges of fish to better inform management strategies including sizes and locations of protected areas
- Documents behavioral activities, such as spawning or seasonal movement, to help researchers and managers better understand the biology and ecology of key species
- Facilitates collaborative marine research through sharing of hydrophone data and array setups
- Contributes to inspiring visualizations of fish movements for scientists, policymakers, and marine life enthusiasts
REEF's Grouper Moon Project has relied heavily on this technology to help answer questions necessary to hep conserve Nassau Grouper spawning aggregations. Populations of this iconic species have declined dramatically over the past half-century due to overfishing during winter months as they aggregate to reproduce. To find out more about this activity, REEF researchers and our partners at Cayman Islands Department of Environment set up an array of acoustic receivers and started tagging Nassau Grouper in 2005. Using data from this technology, REEF created a video that shows the remarkable migrations Nassau Grouper undertake during the spawning season. This visualization tool played a critical role in the creation of proposed legislation aimed at species conservation in the Cayman Islands. To watch this movie and read more about it, please click here.
Please make a donation at www.REEF.org/contribute so REEF can continue using acoustic tagging in projects and programs. This valuable tool helps ensure that we can protect iconic species like Nassau Grouper in the most effective manner. Thank you for your support.
REEF members are at the heart of our grassroots marine conservation programs. Over 50,000 divers, snorkelers, students, and armchair naturalists stand behind our mission.
This month we highlight Peyton Williams, a REEF member since 2012. An active member based in Hawaii, Peyton teaches SCUBA and passes on the fun of doing REEF surveys to others. Here's what he had to say about REEF:
How did you become involved with REEF?
I had been diving for about 30 years when I decided to become an instructor. With my increase in diving on trips, I grew bored with blowing bubbles, and decided it was time to learn more of the ecology of the dive sites (mostly in the Caribbean) I visited. My mentor was Marty Rayman, who had worked as a volunteer at the National Aquarium. Marty offered an outstanding Fish ID course that was based on the REEF program. I have been teaching Fish ID for both the TWA and Hawaii ever since using the REEF program, requiring my students to perform at least the two survey dives to become a Level 2 surveyor. Unfortunately, as an instructor, I do not get to do as many surveys as I would like, but I do get to point out many interesting critters to students and others as we dive that I would not have learned as easily without the REEF programs.
What is your favorite part about being a REEF member?
Being able to learn more about the ecology of areas I am diving in. I am a regular with the Fishinars, even for regions I do not survey in regularly. It also gives purpose to my observing fish by completing the surveys and entering them into the database.
What is the most memorable fish encounter you’ve experienced?
While taking a Venturing scout on her 4th open water dive while on a live-aboard in Bimini, I saw a large hammerhead come up on our left. I decided not to tell her, but when the hammerhead passed us and curved about 20 feet in front, I changed my mind and pointed him out. Her excitement was palpable. And she had no fear. When we returned to the boat she yelled, “I saw a hammerhead!” My wife, helping at the ladder, said, “You saw what! He never takes me where I see the big fish.” Oh, well.
Do you have any surveying, fishwatching, or identification tips for REEF members?
I always try to carry at least a small camera when doing surveys. On a recent trip to St. Lucia where I was teaching fish ID, I saw several fish that I had not known which I photographed and identified at leisure and added to my surveys.
What is your favorite fish?
In Hawaii, it is the Bird Wrasse. It is a very interesting fish. My favorite invertebrate (other than the blue crab that I love to eat) is the banded shrimp. They are fun to play with.
REEF Fest 2015 drew to a close last Sunday in Key Largo, Florida. Thanks to the over 200 members who came to the Keys to help us celebrate. The 4-day event featured diving, seminars, and parties. Seminar topics ranged from fish identification and behavior, to REEF's programs, to underwater encounters with animals big and small. A big thanks goes to all of our event sponsors and auction donors, including Florida Keys dive operators, hotels, and breweries. A special thanks to our platinum sponsors, Atlantis Dumaguete Resort, Explorer Ventures II, and M/V Caribbean Pearl. We especially appreciate Rob and Linda Blesser of Quiesence Diving Services for hosting our Saturday night party and providing lodging for our out-of-town staff.
Mark your calendar for REEF Fest 2016, set for September 29 - October 2, 2016. Watch the event webpage, www.REEF.org/REEFFest2016, for program updates. We hope to see you there!
We are excited to announce two new trips that have been added to the REEF Field Survey schedule -- Micronesia by Land and Sea in October 2016 and the Midriff Islands in the Sea of Cortez in August 2017! Details on these trips are below, and the full schedule of REEF Trips can be found at www.REEF.org/trips. REEF Field Survey trips offer a great introduction to fish identification for novice fishwatchers, and are a fun way for experienced surveyors to build their lifelist while interacting with fellow ocean enthusiasts. Book early - REEF trips often sell out! Also, keep an eye on the REEF Trips webpage and your inbox- we'll be announcing the full 2017 schedule soon.
Micronesia by Land and by Sea - Manta Ray Bay Resort in Yap and Palau Aggressor II Liveaboard, October 4 - 16, 2016. REEF members and enthusiastic fish surveyors will not want to miss our first-ever Field Survey Trip to Micronesia, alongside REEF's Director of Science, Christy Pattengill-Semmens! This exciting 12-day adventure begins land-based at the world-renowned Manta Ray Bay Resort in Yap, featuring three days of diving Yap's rich coral walls, channels, and lagoon sites, all while observing creatures including manta rays, reef sharks, and maybe even mating mandarinfish. After diving Yap, recharge with a night at the Palau Royal Resort, within walking distance of the yacht marina. Then the excursion continues with a 7-night charter aboard the Palau Aggressor II, with the opportunity for up to 5 dives per day in warm, tropical water. Surveyors can look forward to discovering Napoleon wrasses, titan triggerfish, crocodile fish, and many different species of gobies tucked among an abundance of hard and soft corals. Participants will also have the unique chance to snorkel Palau's Jellyfish Lake and then dive the Chandelier Caves. Visit the trip page for all the details.
Midriff Islands in the Sea of Cortez, August aboard the Rocio del Mar Liveaboard, August 19 - 26, 2017. Join Christy and Brice for an unforgettable week of diving and citizen science in the diverse and dynamic Sea of Cortez, home to a wide range of creatures including nudibranchs, blennies, jawfish, rays, guitarfish, sharks, eels, octopuses, seahorses, and much more! In addition to numerous fish and invertebrate families, participants may also get to observe pilot and sperm whales while in transit. The plankton-rich currents of the Pacific along the coast of California and Mexico, along with the sheltered waters of the Sea of Cortez, also create a great opportunity to encounter whale sharks and manta rays. In fact, Jacques Cousteau once called this region, "the aquarium of the world." And top-side scenery is as spectacular as below the water. Participants will spend 7 nights aboard the magnificent Rocio Del Mar liveaboard, a spacious 110-foot vessel complete with a fantastic crew. Visit the trip page for all the details.
As the air turns crisp and the leaves start to turn, we are winding down on our 2015 Fishinar program. You won't want to miss the last two sessions -- Fishes of the Channel Islands of California on October 20th and the Top 25 Fish You Should Know in the Caribbean on November 16th. From the comfort of your own home, or on-the-go on your mobile device, you can join in the camaraderie of your fellow fish-fanatics and learn from experts in our short, free, fun and interactive-styled Fishinars (our version of Webinars). Check out www.REEF.org/fishinars for more information. And keep an eye on the webpage for our 2016 schedule coming soon. If you have a topic that you would like to see covered, drop us a note!
If you haven't checked out REEF's online store recently, now is a perfect time to get a jump on your holiday shopping! We have added several new items, including a newly-designed REEF shirt that features our logo with all your favorite ocean creatures intertwined and a brand new Nudibranchs of the Indo-Pacific book. Visit www.REEF.org/store to check out these items and more.