The recent invasion of Indo-Pacific lionfish into Atlantic waters has been causing great concern among researchers, marine park and fisheries managers, and divers. REEF, in partnership with Bahamian dive operators Stuart Cove and Bruce Purdy, NOAA, the United States Geological Service (USGS), the National Aquarium in Washington DC, the Bahamian Government and university groups, has spearheaded the field research for this rapidly expanding problem. As part of REEF’s Lionfish Research Program, over the last two years REEF has coordinated 12 research projects that have involved over 175 REEF volunteers. This research has generated a wealth of in-situ observations and over 1,000 lionfish specimens, which have led to great advances in the understanding of the biology and potential impacts of this most unwanted invader.
REEF’s most recent field project at Stuart Cove’s Dive Bahamas in May 2008, involving over 20 volunteers and researchers, found that the problem continues to get worse. The team gathered data on nearly 200 specimens of lionfish to determine relative abundance, size increases, reproductive status, growth rates, predator prey relationships and movement. Findings included:
Lionfish continue to grow in size: Tagging data show growth rates exceeding 190mm/year, far larger than necessary to reach sexual maturity.
Site Fidelity: All 12 previously-tagged specimens that have been recaptured indicate strong site fidelity even after 6 months.
Prey: Lionfish continue to amaze us during stomach content studies. The recent effort turned up new records including two entire spotted goatfish, a large brown chromis, a small reef octopus, and even a small mollusk in its shell. Lionfishare eating nearly anything that will fit into their mouths.
Reproduction: Lionfish reproduction occurs throughout the year – many gravid females and a small recently settled juveniles have been found.
REEF’s future fieldwork will concentrate on lionfish movement, trap design, habitat preference, and local control measures. Our next project is scheduled to take place at Stuart Cove’s Dive Bahamas in Nassau from September 14-20. If you would like to help with our ongoing work please consider joining us as a field volunteer and/or making a contribution to REEF’s Exotic Species Program.
For more information on REEF’s Exotic Species Program, to volunteer on a future research project or to discuss funding opportunities, contact REEF Director of Special Projects, Lad Akins, Lad@reef.org.
The USS Hoyt Vandenberg is the most recent ship to be placed as an artificial reef in the waters off Key West, Florida. The ship was sunk on May 27, 2009, but three weeks prior to the sinking the REEF team was in action conducting surveys of the sinking site and 7 other adjacent sites for comparison. The data will be used by the State of Florida to document fish recruitment onto the wreck and response of nearby reef sites to the new structure. In addition to regular REEF fish surveys, the team is also gathering important fish biomass data at two sites and recording any observations of non-native titan acorn barnacles, orange cup corals or non-native fish including lionfish.
The pre-deployment surveys at the sinking site did not document any fish present at the sandy bottom site though one barracuda was seen swimming through the area shortly after. Combined data from the 7 reference sites documented 159 species including rare sightings of pugjaw wormfish and cherubfish (rare for the Keys). The summary of data can be found here.
REEF will continue regular monitoring of the Vandenberg and reference sites through next summer, with a final report due by the end of 2010. A huge thank you to all of the REEF experts joining in on the effort including Rob McCall, Tracy Harris, Dave Grenda, Brenda Hitt, Jamie Giganti, Lisa Canty and Pat Zuloaga.
Earlier this month, on World Oceans Day, we kicked off REEF's Summer Fundraising Campaign with a goal of raising $60,000 by July 31. Thanks to the Curtis and Edith Munson Foundation, who has generously offered to match your donations, we are over one-third of the way to our goal with $10,345 donated and matched so far. To all of our members who have already donated, we extend our sincere gratitude. If you haven't yet had a chance, please contribute today. You can double your donation in the upcoming month by contributing online, https://www.REEF.org/contribute, through our secure web form. Or you can print the donation form and mail or fax your donation, or call our staff at REEF headquarters (305-852-0030).
Your donation will help support REEF services, which are increasingly in high demand. As the lionfish invasion continues to grow, so does our research and response. Legislation to ensure long-term protections of Nassau Grouper spawning aggregations are set to expire in 2011. And after the devastation in the Gulf, REEF’s Volunteer Fish Survey Program data can be invaluable in evaluating the impact of the oil spill to fish populations. Twenty years of support from members like you has made it possible for REEF to build and maintain this valuable history of fish populations throughout our program regions. We could not do this vitally important work without you. We are doubling our efforts now, and we hope you will double your contribution this summer.
World-wide declines in shark and ray populations have prompted the need for a better understanding of their patterns of distribution and abundance. While much of the focus has been on the larger species of sharks, little attention had been paid to the most frequently sighted elasmobranch species in the greater-Caribbean, the yellow stingray (Urobatis jamaicensis). Despite being relatively common and listed as Least Concern on the IUCN Red List, little was known about the status of this species. Unfortunately, it has been quietly declining. Dr. Christine Ward-Paige and her colleagues at Dalhousie University worked with REEF's Director of Science, Dr. Christy Pattengill-Semmens, to examine the status of yellow stingray. The results of this study were recently published in the scientific journal, Environmental Biology of Fishes. Click here to read the paper.
The study used 83,940 surveys collected by REEF surveyors in the western Atlantic. In total, yellow stingrays were observed on 5,658 surveys (6.7% sighting frequency) with the highest occurrence in the regions surrounding Cuba. Overall, sighting frequency declined from 20.5% in 1994 to 4.7% in 2007. However, these trends were not consistent in all regions. The strongest decline occurred in the Florida Keys, the most sampled region, where trends were similar among all areas, habitats and depths. Possible explanations for these changes include habitat degradation, exploitation (this species is collected for medical research and the aquarium trade), and changes in trophic interactions. The results of the study suggest large-scale changes in yellow stingray abundance that have been unnoticed by the scientific community. This study also highlights the value of non-scientific divers for collecting data that can be used to understand population trends of otherwise poorly studied species.
To see this and other scientific papers that have been published using REEF data, check out the Publications page on the REEF.org website here.
Changing Seas, an original production of Miami’s public television station WPBT2, will host a live online screening event of Alien Invaders, the series’ latest episode focusing on the lionfish invasion in the Caribbean and Western Atlantic. Alien Invaders will be screened live on the Changing Seas website (www.changingseas.tv/webcast) on Thursday, June 2nd at 7:30 p.m. EST. During the screening, dive enthusiasts will have the opportunity to join an online chat with producers and the experts featured in the program. REEF's Lad Akins and researcher Stephanie Green will be be online to answer questions live during the event.
REEF members are at the heart of our grassroots marine conservation programs. Over 43,000 divers, snorkelers, students, and armchair naturalists stand behind our mission.
This month we feature Patricia Broom (REEF member since 2004). Pat is a member of REEF's Advanced Assessment Team in the Tropical Western Atlantic and has conducted 277 surveys in three of REEF's regions, including some of the first in our newest region, the South Pacific. Here's what Pat had to say about REEF:
When and how did you first volunteer with REEF or become a REEF member?
About ten years ago while reading a favorite dive magazine I noticed an announcement about an introductory fish identification trip sponsored by REEF and led by Paul Humann. The love of REEF was born!! I responded to the advertisement, encouraged my brother to join me and attended that Field Survey trip. We joined a group of equally dedicated divers eager as we to learn about fish and how to identify them. Paul was a great teacher, very patient and concerned that we not only learn about fish but care about them and the ocean we love.
If you have been on a REEF Field Survey, where and what was a trip highlight?
One of my most memorable surveying moments occurred that week on Paul's trip. On a night dive of a very old wreck with exposed wooden beams I saw my first queen parrotfish in their nighttime cocoons. Each parrot fish occupied a space between two beams framed by basket stars in full bloom. It was a magical sight. I try to take two or three REEF trips a year, they are a great way to learn more and dive with great people. In addition to the regular ID trips, I have really enjoyed the REEF Behavior Trips that are led by Ned and Anna DeLoach. It really completes the learning experience! It is a beautiful sight to watch damselfish guard their algae gardens from predation, observe cooperative hunting, or watch a three foot Midnight Parrotfish at a cleaning station with open mouth and flared gills.
What inspires you to complete REEF surveys?
Prior to that introductory course, I had been diving the Caribbean for twenty plus years. I witnessed the decline in fish numbers and species as well as reef degradation and wondered how many more years I could dive before there was nothing to see! REEF offered me a reason to continue diving, now there was opportunity to give back and enjoy diving again.
Do you have a favorite local (or not) REEF field station or dive shop?
I have found great enjoyment in Cozumel at the REEF Field Station at Aqua Safari, led by Sheryl Shea. She is a gifted teacher determined to make advanced assessment divers of all of us! It just so happens a few of my favorite fish are in Cozumel, the Splendid Toadfish, Sargassum Triggerfish, and Cherubfish, to name a few.
If you haven't had a chance to attend one of our Fishinars yet, you should! New sessions are always being added, so check out the Webinar Training page (www.REEF.org/resources/webinars) to see the current schedule and to register for one or more sessions. These popular online training sessions (webinars) provide fishie fun in the comfort of your own home. Fishinars are free, and open to all REEF members. You need to register for each session you want to attend. No special software is required, just a web browser. You don't need a microphone or a webcam to be able to participate. Great for first-timers or those wanting a review. Upcoming sessions include:
The Wrasse Class: The Top 12 Wrasse of the Greater Caribbean - Need help with those rascally wrasse? Come to this class and get the ID tips you seek! Learn tips from REEF Expert and fish geek, Jonathan Lavan. Thursday, Jun 21st at 8pm EDT. REGISTER
Sculpins Under Scrutiny - Sculpins have been called some pretty bad names through the years, because it's so difficult to tell them apart. Well, it's time to master the art of identifying the little buggers and Sculpin Master Guru, Dr. Greg Jensen, will be the one to help you along your journey to loving sculpins. Greg will cover some of the lesser-known and lookalike sculpins. Thursday, July 19th at 7pm PDT. REGISTER
The Blennywatcher!- Oooh, this is gonna be a good one! Videographer and blenny expert Anna DeLoach will walk us through some of her favorite Blennies and how to tell them apart. Tuesday, July 31st at 8pm EDT. REGISTER
REEF is once again partnering with CEDAM International to support an educator to participate in one of our REEF Trips. The selected Lloyd Bridges Scholar will join Paul Humann on the Little Cayman Field Survey in July 2013. The goal of the scholarship program is two-fold: One, to have educators experience the wonders of the underwater world and then be able to share these wonders with his or her students or constituents. Two, to have these inspired individuals go out and do what they can to help protect one of the world’s most fragile ecosystems. To be eligible, applicants must be a certified scuba diver, a teacher (elementary or secondary level), or actively engaged in an education program at an institution or environmental organization, such as an aquarium, science center, or relevant non-profit organization. More information and application information is posted on the CEDAM website.
The 2013 REEF Trips Schedule includes destinations in the Caribbean, Canada, and tropical Pacific. These trips offer a great introduction to fish identification for novice fishwatchers, and are a fun way for experienced surveyors to build their life list while interacting with fellow fishwatchers. Each trip features daily classroom seminars and a full diving schedule. Complete package details and prices can be found online at www.REEF.org/trips.
2013 dates and destinations with space --
May 11 - 21, 2013 Fiji, aboard the Nai'a, Led by Paul Humann FULL, waiting list available
May 18-25, 2013 Southern Bahamas, Lionfish Research Cruise aboard Explorer II, led by Lad Akins, REEF Director of Special Projects, and Peter Hughes
July 13-20, 2013 Little Cayman, Southern Cross Club, led by Paul Humann, REEF Co-Founder and Renowned Underwater Photographer and Marine Life Author
July 20-27, 2013 Utila, Deep Blue Utila, led by Ned and Anna DeLoach, REEF Board Members and World-Famous Marine Life Authors and Photographer/Videographers FULL, waiting list available
August 31-September 7, 2013 Curacao, with GO WEST Diving and Sandton Kura Hulanda Lodge, Lionfish Research Trip, led by Lad Akins, REEF Director of Special Projects, and Peter Hughes
September 25-28, 2013 Barkley Sound, British Columbia with Rendezvous Dive Adventures. Led by Janna Nichols, REEF Outreach Coordinator
September 28-October 1, 2013 Barkley Sound, British Columbia with Rendezvous Dive Adventures. Led by Janna Nichols, REEF Outreach Coordinator
October 5-12, 2013 Grenada, with True Blue Bay Resort and Aquanauts Diving. Led by Dr. Christy Pattengill-Semmens, REEF Director of Science
December 3-12, 2013 Socorro Islands, aboard Rocio del Mar, led by Andy Dehart and Marty Snyderman, Shark Experts, Photographers, and REEF Board Members
December 7-14, 2013 Cozumel, Aqua Safari, led by Tracey Griffin and Sheryl Shea, REEF Fish Experts and Cozumel Naturalists