At just around 20 years old, Diana, a loggerhead turtle, has already made a remarkable journey. She traveled over 6,400 kilometers from Ceuta to the Caribbean, one of her nesting spots. Rescued in June of last year, Diana was drawn to fishermen’s nets, searching for food. Little did anyone know that this encounter would lead her on an extraordinary adventure across the Atlantic.
Diana was released after a month in a recovery center. She spent the summer in the Alboran Sea, along with five other turtles marked for research by the Oceanographic Institute of Spain. Each turtle was fitted with a GPS tracker to study the impact of climate change on their migration patterns.
On September 18, she entered the Strait of Gibraltar and made her way towards the American coast, reaching it by February. Along the way, she came close to the mouth of the Amazon but didn’t go in. She made several stops, likely to lay eggs in Suriname and Trinidad and Tobago. Female turtles only come ashore for this purpose, while males remain in the ocean their entire lives.
Interestingly, not all marked turtles took the same route. Some stayed in Cape Verde while others remained in the Mediterranean. According to researcher José Carlos Báez, this indicates that the waters around Spain feature a mix of different populations of loggerhead turtles.
Diana’s journey began after she recovered from being trapped. She had difficulty diving, a sign of her earlier struggles. Once back in the water, she swiftly navigated towards the Atlantic, seeking the right temperatures for her voyage.
By February 6 of the current year, Diana appeared near the Amazon again, making her way north towards South America. Scientists are curious about the migration of both male and female turtles. Rising temperatures threaten the turtle population; their sex is determined by the temperature of the sand where eggs are laid. Cooler sand produces more males, while warmer sand leads to more females. Of the six turtles tracked, only one is male.
Alma, another turtle that started her journey with Diana, mysteriously stopped sending signals while in the ocean. This mystery highlights the challenges faced by scientists trying to monitor these creatures.
Each GPS transmitter captures valuable data, including the turtle’s depth and water temperature. Diana has dived to depths of 100 meters. Scientists rely on these signals to track her movements, anxiously watching for her to resurface.
The future of loggerhead turtles is uncertain as climate change alters their habits. They are now nesting in areas of Spain that were once not traditional breeding grounds. Regions in Almeria, Valencia, and Catalonia have seen a rise in nesting activities.
Historically, Greece and the sandy beaches of Libya and Turkey were significant nesting sites in the Mediterranean. Spain is becoming a new area of interest for these turtles as they adapt to changing conditions. Though they’ve survived numerous extinctions over the past 150 million years, ongoing climate shifts may force them to evolve once again.
In conclusion, Diana’s journey illustrates not just the resilience of loggerhead turtles but also the intricate web of migration patterns that connect continents. Scientists’ ongoing research plays a crucial role in understanding and protecting these magnificent creatures as they navigate a changing world.
For more detailed insights on loggerhead turtles and their conservation, visit Oceanographic Institute of Spain.
