First Look at Mote scientists to join OCEARCH on shark research expedition March 15 – April 2

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Written by: Pam Sherrod
Additional Notes for review by: Janis Noland

Sarasota, the home of one of the country’s most desirable beaches and tourist attractions, hosts the country’s most renowned marine biology lab at the Mote Marine Aquarium, from which three scientists will participate in a voyage this month to research and tag great white sharks.

Dr. Robert Hueter, Mote Senior Scientist, and Dr. Heather Marshall, Mote Postdoctoral Research Fellow, will join the shark research expedition aboard M/V OCEARCH, which launches from Jacksonville, Florida on March 15th.

Dr. Marshall, who credits her passion for the research from an early, childhood fear of sharks, continues her ground breaking study to help dispel similar fears which she feels are attributed to a misunderstanding of shark behavior and their migration patterns. Like Dr. Marshall, Dr. Hueter has been involved in research for many years, and has yielded significant data and insight into the behavior of sharks, particularly great white sharks, which is the focus of their research.

Dr. Marshall stressed that, unlike the prevailing images and fears about the proximity of sharks to swimmers, sharks have considerably less interest in interacting with humans than in following their migration patterns. Learning about these patterns is key to educating the public and ensuring practical and efficient safety measures.

One of the most interesting discoveries has been the re population of sharks, which they believe will contribute to improving the ocean’s ecosystem. Their population had declined significantly over the past few decades, so researchers consider this a good trend and hope that it will continue.

Having participated in previous voyages, both scientists look forward to the Jacksonville Expedition as a means of building on their past accomplishments. They have accumulated extensive research from five female sharks that were tagged on prior expeditions. While they hope to tag a male shark this time, they credit the females for providing great insight into the nature of shark reproduction.  When tracked, one shark, in particular, named Lydia, had made the transatlantic migration from east to west, providing stunning new insights. The tracking devices offer a wonderful opportunity to view their migration, not only for scientists, but for the general public. By downloading the Global Shark Tracker app, visitors can view and study the route of these sharks.

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Mote scientists to join OCEARCH on shark research expedition March 15 – April 2

 

Dr. Heather Marshall taking blood samples from great white shark Katharine in 2013. The public can watch Katharine’s movement, along with other tagged great white sharks, on the OCEARCH Global Shark Tracker: www.ocearch.org. Photo credit: R. Snow/OCEARCH,

Mote scientists to join OCEARCH on shark research expedition March 15 – April 2

Building on data and findings from previously tagged great white sharks, three Mote Marine Laboratory scientists and eight other researchers will embark on another major shark research expedition aboard M/V OCEARCH in the Atlantic Ocean.

Expedition Jacksonville will launch on March 15 and return on April 2. It will start from Jacksonville, Fla., proceed off Florida’s northeastern coast, and for the first time in an OCEARCH shark expedition, will reach waters off the southern coast of Georgia.

During these two weeks, scientists from 10 institutions plan to tag, sample and release white sharks with a purpose of gathering data to further understand the ecology, natural history, physiology and behavior of white sharks in the Atlantic Ocean.

Three years ago, on March 3, 2013, another OCEARCH expedition tagged white shark Lydia in Jacksonville. Since then, she has traveled over 35,000 miles and was the first documented white shark to cross the Mid-Atlantic Ridge, demonstrating the connectivity of Florida waters with northeastern Atlantic waters off Europe. The M/V OCEARCH is now returning for its 24th expedition to generate scientific data critical to ocean conservation. These expeditions allows researchers to study shark migration patterns in different parts of the world and helps them uncover areas in need of protection.

To build upon previous findings, Expedition Jacksonville will bring together 11 scientists from multiple institutions. Lead scientists include Dr. Bob Hueter, Director of the Center for Shark Research at Mote Marine Laboratory, Dr. Gregory Skomal, Senior Scientist at MA Marine Fisheries, and Dr. James Gelsleichter, Director of the University of North Florida’s Shark Biology Program.

Participating Mote scientists will include Drs. Robert Hueter, Heather Marshall and Kim Ritchie.

Hueter will serve as a principal investigator on the expedition, helping to oversee the dozen or so procedures that are performed on captured white sharks during the 15 minutes that the scientists have access to the animals on the ship. His primary research interest is in the use of satellite tags, devices that are attached to the sharks to track their long-term movements for up to five years. This, he says, helps reveal what habitats and space these animals need to thrive.

“Previous research has indicated that northern Florida and southern Georgia provide important habitat for white sharks, especially in winter months,” Hueter said. “As top predators, sharks play an important role in preserving the balance of ocean ecosystems, but habitat  loss and climate change are two of the issues these animals face today. We hope to learn more about the suitability of shark habitat in northern Florida and southern Georgia.”

Dr. Heather Marshall will take blood samples from the sharks to study the physiological effects of capture stress in the white shark. Because incidental fishing capture of sharks is a worldwide problem, it is critical to understand how capture and handling affects the physiology of these fish, and how such stress carries over to the ability of these animals to recover.  Such data are vital for management of sharks vulnerable to being overfished and/or becoming accidental bycatch.

“By taking blood samples from these white sharks, we’re able to learn more about how these sharks react after they are caught, handled and released,” Marshall said. “Data collected from this trip, not just for my research, but for others as well, will lend valuable insight into how to better preserve this species, and that is critical.”

Dr. Kim Ritchie aims to build upon Mote’s unique research project studying antibiotic-producing bacteria from stingrays with the dual goals of understanding shark immunity and discovering novel sources of antibiotics.

During this expedition, Ritchie will collect bacterial samples from the shark’s epidermis (outermost layer of skin) to study the antibiotic-producing bacteria associated with white sharks, which can help explain the animal’s natural resistance to disease and injury. Bacteria will be cultured, purified and screened against eight human and three marine pathogens for possible new sources of antibiotics that could fight antibiotic-resistant bacteria.

“Researchers at Mote are trying to understand the rapid wound healing that is a characteristic of sharks, skates and rays,” Ritchie said. “We’ve discovered that skates and rays harbor numerous bacteria that produce antibiotics — many against some terrible antibiotic-resistant, infectious bacteria strains that are huge problems in hospitals. We’re interested in understanding elasmobranch (sharks, rays and skates) immunity by studying their beneficial microbes. As an added benefit, elasmobranchs, including white sharks, may be a novel source of antibiotics.”

Mote scientists have partnered in multiple expeditions led by OCEARCH, a nonprofit organization dedicated to gathering scientific data for tracking (telemetry) and biological studies of keystone marine species such as great white sharks.

The ship M/V OCEARCH, which will be their at-sea laboratory, has a 75,000-pound-capacity hydraulic platform designed to safely lift mature sharks out of the ocean. This allows multi-disciplinary research teams to work with the sharks and then return them to sea.

Sharks play important roles as top predators that help preserve the balance of ocean ecosystems, but they face pressures such as overfishing and habitat loss, and much more research is needed to fully understand threats to their populations and to inform fisheries management.

During the expedition, sharks will be tagged with satellite transmitters, allowing scientists to monitor their travels and the public to follow along via OCEARCH’s global shark tracker at www.ocearch.org.

Mote Marine Laboratory is an independent, nonprofit marine science institution dedicated to today’s research for tomorrow’s oceans. Mote has 25 diverse research programs that work in oceans around all seven continents, and it has the only Center for Shark Research designated by U.S. Congress.

How you can follow the progress of Expedition Jacksonville:

OCEARCH’s hashtag for this expedition: #ExpeditionJax
Mote’s hashtag: #MoteMarineLab

  • Mote will offer a live Google Hangout with the scientists aboard M/V OCEARCH from 11:30 a.m. -12:30 p.m. ET on Wednesday, March 23, 2016. This live program is focused on shark behavior research. This Google Hangout is a free video chat service that enables interaction between participants and Mote scientists. Participants will learn and discuss how and why Mote studies these animals, why sharks are important to the ocean ecosystem and what humans can do to help conserve and protect sharks. Participants will have the opportunity to ask questions with Mote ocean experts, Dr. Bob Hueter, Associate Vice President for Research at Mote, and Dr. Heather Marshall, a Staff Scientist in Mote’s Behavioral Ecology & Physiology program.

Watch for FREE live on YouTube or live and interact on the Google Hangout. For more info: seatrek.tv/live.

Enhanced access for education groups. Schools and other education-focused groups are invited to make a Google Hangout session an interactive experience with the ability to ask questions via chat or video. Recommended for ages 11-18 or grades 6-12. For more information contact Kasey Gaylord-Opalewski, Digital Learning Coordinator, at [email protected] or 941-388-4441, ext. 263.

Founded in 1955, Mote Marine Laboratory & Aquarium celebrated its 60th year as an independent, nonprofit 501(c)3 research organization in 2015. Mote’s beginnings date back six decades to the passion of a single researcher, Dr. Eugenie Clark, her partnership with the community and philanthropic support, first of the Vanderbilt family and later of the William R. Mote family.
Today, Mote is based in Sarasota, Fla. with field stations in eastern Sarasota County and the Florida Keys and Mote scientists conduct research on the oceans surrounding all seven of the Earth’s continents.
Mote’s 25 research programs are dedicated to today’s research for tomorrow’s oceans, with an emphasis on world-class research relevant to the conservation and sustainability of our marine resources. Mote’s vision also includes positively impacting public policy through science-based outreach and education. Showcasing this research is Mote Aquarium, open from 10 a.m. to 5 p.m. 365 days a year.
Learn more at mote.org.Contact Us:
Mote Marine Laboratory and Aquarium, 1600 Ken Thompson Parkway, Sarasota, Fla., 34236. 941.388.4441
Copyright©2016 Mote Marine Laboratory and Aquarium, All rights reserved.

 

 

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