Sea turtles

Sea turtles are iconic marine reptiles that date back to the dinosaurs and an important attractor for dive tourism. They are also keystone species with a vital role in the health of the oceans, linking various ecosystems from beaches to seagrass beds and coral reefs. Sea turtles use beaches and the lower dunes to nest and lay their eggs. Before they were protected the turtles and the eggs were a valuable food source.
Turtle population is monitored by nesting surveys, foraging ground surveys and sightings during tourist dives (more). The nesting season for sea turtles in the Dutch Caribbean roughly lasts from May to January. 


Bonaire

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Data provided by: Sea Turtle Conservation Bonaire (STCB)

Data analysis by: Wageningen University and Research

 


St. Eustatius

Sea turtles have existed for around 150 million years and are vitally important for healthy beaches, seagrass beds and coral reefs. While globally threatened with extinction, sea turtles are protected on St.Eustatius.  The total number of turtle nests have been fluctuating over the past two decades. The leatherback has become an infrequent visitor in the last 5 years.

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Data provided by: J. Berkel, STENAPA

Data analysis by: Wageningen University and Research


St. Maarten

Total number of turtle nests (2005-2018; Green turtle, Hawksbill, Leatherback)

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Data provided by: Nature Foundation St Maarten in collaboration with Dive adventures, Ocean Explorer, Scuba Fun, Dive Safaris, Dive Sint Maarten

Data analysis by: Wageningen University and Research


Saba

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Data provided by: Sea Saba

Data analysis by: Wageningen University and Research


Sea turtles monitoring methods

Nesting surveys: Bonaire and St. Eustatius

In the nesting season the beaches most used by turtles are patrolled by monitoring staff and volunteers. Signs of nesting and hatching are recorded. Moreover, nests are excavated and detailed information is gathered on the number of eggs laid and the hatching and emergence success.

Foraging ground surveys: Bonaire

Around March-April snorkel surveys are swum for about one hour and the number turtle  individuals are counted per species.

Sightings during tourist dives: Saba

All year round tourists dive together with a guide trained in species recognition. The guides registers the species and number of individuals sighted per dive.