Mangaluru Proposes Systematic Turtle Tagging Initiative for Olive Ridley Conservation
The Arabian Sea Fisheries Management Coordination Committee (Sea-MC²), in partnership with the forest department and the College of Fisheries, has announced plans to implement a systematic turtle tagging programme. This initiative is scheduled to commence with the next Olive Ridley turtle nesting season, marking a significant step forward in marine conservation efforts along the Mangaluru coast.
Scientific Method for Tracking and Identification
Dr Shivakumar Magada, director general of Sea-MC², explained that tagging represents a globally recognized scientific approach for identifying and monitoring sea turtles over extended periods. "The process involves attaching a small, uniquely coded tag—such as flipper tags or passive integrated transponder (PIT) tags—in a manner that is both safe and non-invasive for the animals," he stated. This methodology allows researchers to gather precise data without harming the delicate marine creatures.
Objectives and Expected Outcomes of the Tagging Program
The primary goals of the tagging initiative include:
- Generating crucial data on migratory routes and nesting site fidelity
- Monitoring growth rates, survival patterns, and population dynamics
- Studying early survival, movement patterns, and feeding behavior through limited 'nano-tagging' of hatchlings under controlled conditions
Dr Magada emphasized that "the collected data will enable the design of more evidence-based conservation strategies, help identify critical habitats, and strengthen both regional and national turtle protection efforts." While hatchlings are typically not tagged due to their fragile nature, the controlled nano-tagging experiments could provide valuable insights into their developmental stages.
Recent Nesting Activity and Hatchling Success
In related developments, hatchlings from the fourth Olive Ridley nest along the Mangaluru coast successfully made their journey to the sea on Tuesday night. At Sasihithlu, 84 hatchlings emerged from a total of 129 eggs, demonstrating encouraging survival rates. This season has seen eight nests recorded so far, with notable activity in Idya, Bengre, and Sasihithlu areas.
Forest department officials, including DCF Antony Mariyappa who oversees coastal conservation efforts, have been actively monitoring these events. Other officials present during the hatchlings' seaward journey included ACF Mangaluru sub-division Shashikanth S Vibhute, range forest officer Manoj Sona from the coastal and marine ecosystem cell, Mangaluru city police commissioner Sudheer Kumar Reddy CH, and Dr Shivakumar Magada.
Conservation Challenges and Environmental Factors
A senior forest department officer noted that while 24 nesting sites were recorded last season, numbers have declined this year, potentially due to climate-related factors. Despite this decrease, the hatching success rate has remained encouraging at approximately 65–70%.
Forest officials have stressed the importance of maintaining clean beaches for successful nesting and hatching. Proper waste segregation at source is essential to prevent plastic from entering the sea, as many stormwater drains are currently clogged with plastic waste. Experts have also highlighted the threat posed by ghost nets, which endanger marine life through entanglement.
Turtle nesting serves as an important indicator of a healthy marine ecosystem and is believed to contribute to improved fish catches, underscoring the broader ecological significance of these conservation efforts.
