Trincomalee pigeon island reef shark tagging: acoustic telemetry arrays and juvenile dispersal?
What hydrophone tracking networks monitor juvenile blacktip reef shark movement corridors between Pigeon Island and Nilaveli mainland creeks?
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3 Answers from travellers
Acoustic telemetry research in Pigeon Island National Park tracks the residency and juvenile dispersal of Blacktip Reef Sharks (Carcharhinus melanopterus). Marine researchers capture juvenile sharks in shallow nursery bays, surgically implant small acoustic transmitters into the peritoneal cavity, and release them. Underwater acoustic monitoring receivers moored across the 1-kilometer channel between Pigeon Island and Nilaveli record individual tag pings, mapping seasonal home ranges and demonstrating that growing sharks eventually disperse to outer continental shelf reefs.
Receiver batteries and data cards are downloaded by scuba divers every three months to retrieve continuous presence-absence telemetry records.
Telemetry data confirms that seasonal tourist overcrowding in the shallow nursery lagoon causes temporary behavioral displacement among juvenile sharks.
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