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Context
Warming oceans and disruptions in the food chain are not only altering the marine ecosystem but are also launching an 'invisible strike' on the biological structure and reproductive cycles of ancient marine travelers—the Loggerhead turtles. This crisis serves as a warning for the survival of the species, where their ability to adapt to nature is now crossing its limits.
Key News Points
According to a 17-year long-term study (Cabo Verde, West Africa) recently published in the journal 'Animals', climate change has impacted Loggerhead turtles in the following four ways:
- Pre-mature Changes in Breeding Season: Due to rising ocean temperatures, turtles have started nesting and laying eggs much earlier than the usual time of the year.
- Decline in Reproductive Capacity: A continuous decrease is being observed in the total number of eggs laid by female turtles (clutch size).
- Reduction in Breeding Frequency: Turtles are now breeding less frequently than before, which is concerning for the stability of their population.
- Shrinking Physical Size: Due to the scarcity of food resources and changing environmental conditions, the physical size of these turtles is getting smaller, which is affecting their biological efficiency.
Loggerhead Turtle: Ecological Status and Conservation
- The Loggerhead turtle is known for its exceptionally large head and powerful jaws.
- These marine reptiles are omnivorous and play a vital role in maintaining the health of the marine ecosystem by consuming invertebrates living on the ocean floor.
Environmental and Conservation Status:
- IUCN Red List: Loggerhead turtles are listed in the 'Vulnerable' category by the International Union for Conservation of Nature (IUCN).
- CITES: This species falls under Appendix-I of the 'Convention on International Trade in Endangered Species of Wild Fauna and Flora' (CITES), which imposes a complete ban on their commercial trade.
- Major Habitats: These turtles are found in the Atlantic, Pacific, and Indian Oceans, as well as the Mediterranean Sea.
- Main Threats: In addition to climate change, these turtles face threats such as marine pollution (plastic), accidental entanglement in fishing nets (by-catch), and habitat destruction due to coastal development.
Conclusion
These changes in the behavior and physical structure of Loggerhead turtles are not just a crisis for a single species, but a reflection of the deteriorating health of the oceans. If global temperatures and marine pollution are not controlled in time, we may permanently lose these invaluable evidences of evolutionary history.