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Reefs Go Live 2021 launches with special Quiet Oceans event

Caribbean DTA Team

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The Central Caribbean Marine Institute are launching their Reefs Go Live 2021 series with two special events discussing how the COVID19 pandemic has affected the reefs of the Cayman Islands.

The oceans have been quiet in the Cayman Islands, due to the border closures resulting from the Covid-19 pandemic. Dr Gretchen Goodbody-Gringley and the CCMI team have been studying how the quiet oceans have impacted fish populations, creating important insight into how we can manage coral ecosystem health.

Join the CCMI team to learn more at these two online events:

Quiet Oceans Reef Lecture and Webinar

Thursday 25th March, 12pm – 1pm (EST)

National Gallery of the Cayman Islands

Register for online webinar or get tickets by clicking here.

Reefs Go Live

Friday 26th March, 10am (EST)

Register here

For details on future Reef Go Lives events and to learn more about the work of the CCMI visit their website by clicking here.

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Missing Shark Week?

Nick and Caroline Robertson-Brown

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Get your fix in The Out Islands of The Bahamas!

A designated shark sanctuary since 2011, The Bahamas boasts some 40 species of sharks, and dozens of dive operators ready to help you live your own Shark Week adventure. Best of all, for US and Canadian citizens, when you book one of 35 participating Out Islands hotels, they’ll treat you to free round-trip flights or ferry tickets from Nassau! For European residents, there is a similar offer up for grabs – click here to find out more!

Shark highlights include:

Andros

On just about every dive in Andros, you will see a shark. The puppy dog-like Caribbean Reef Shark is the most prominent.

Bimini

Just a half-mile off Bimini, you’ll find endangered great Hammerhead Sharks and the occasional Bull Shark and Lemon Shark on shallow dives in Bimini’s warm waters.

Cat Island

Discover the world’s largest concentration of Oceanic Whitetip Sharks in the deep, protected waters around Cat Island.

The Exumas

Meet abundant (and mostly friendly) Nurse Sharks around the Exumas’ colorful reefs or resting under a dock.

Long Island

Visit the world’s first developed and still naturally unchanged Stella Maris Shark Reef. Dive and see the Bahama Grey Tip Reef Sharks (usually a dozen or more), an occasional Bull Shark, Nurse Shark, or Hammerheads.

For more information visit The Out Islands website by clicking here.

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Sharks move to deeper water as they mature

Nick and Caroline Robertson-Brown

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A new study from Wageningen University & Research (WUR) showed that reef sharks utilize different areas of the reef throughout their lifetime.  Using baited video cameras, six different species of reef sharks were recorded around the northern Dutch Caribbean islands. These results will impact the design and implementation of shark conservation strategies for years to come.

Reef Sharks

Reef sharks play a critical role within the ocean. As a top predator, reef sharks help maintain the delicate balance within (coral) reef environments. In fact, research has found that reefs with healthy shark populations are more resilient and capable of withstanding the pressures of climate change, pollution, overfishing and diseases.

Juvenile Sharks

Understanding the dynamics of habitat use of local shark populations is critical when designing effective marine conservation strategies. This is exactly what the latest reef shark study from WUR hoped to achieve. Using baited remote underwater video cameras at 376 locations around the reefs of Saba, Saba Bank and St. Eustatius, fish ecologist Twan Stoffers and his colleagues recorded 126 different shark sightings.

Of the six different species recorded in this study, juvenile Caribbean reef sharks (Carcharhinus perezi) and nurse sharks (Ginglymostoma cirratum) were most commonly recorded.  Overall, they observed young sharks in shallow, more complex areas of the reef, whereas the larger, more mature, sharks were observed further away from the reef in deeper habitats up to 65 meter depth. Larger nurse sharks were frequently recorded in seagrass beds. The researchers were surprised that hardly any adults were observed over the course of the entire study.

Implications

This knowledge could have an important impact on conservation strategies for reef sharks and other endangered shark species. Since reef sharks use a variety of different habitats (both shallow and deeper water areas), creating an interconnected conservation network is vital for ensuring full protection throughout their life cycle.  Sanctuaries such as the Yarari Sanctuary (which includes the marine area around the Caribbean Netherlands) are an important step in creating a network of protected areas.  In addition, efforts such as the Caribbean Shark Coalition are important as well, because they work to build capacity for shark and ray research, policy and conservation within the Wider Caribbean Region.

Report your sightings

You can help contribute to the overall understanding of sharks and other species by reporting your nature sightings on sightings and photos on DutchCaribbean.Observation.org or download the free apps (iPhone (iObs) & Android (ObsMapp)).

Species reports by local communities and tourists are invaluable for nature conservation efforts to help increase public awareness and overall species protection.

DCNA, Observation International and Naturalis Biodiversity Center are working together to develop on automated species identification app for your phone for all species on land and in sea. Your uploaded photos are of great value to make this possible. For questions, please contact research@DCNAnature.org

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