Residents kept reporting Dolphins. Underwater microphones revealed their visits
Kyoto University researchers used passive acoustic monitoring to track dolphin activity in Japanese coastal bays after local reports of sightings. The study provides much-needed data on the behavior and frequency of dolphin visits in these changing marine environments.
Why it matters
Acoustic monitoring offers a non-invasive way to study marine life, helping scientists understand the impact of environmental changes on coastal ecosystems.
People living along Japan's Sea of Japan coast had been saying for years that they occasionally spotted dolphins close to shore. Local fishers also reported seeing them from time to time. These sightings were interesting, but scientists did not have enough information to understand how often the animals actually visited these coastal waters or what they were doing there.A new study by researchers from Kyoto University has provided some answers. Rather than waiting to spot dolphins at the surface, the team listened for them underwater using special recording devices. Their findings showed that dolphins visit two bays along the Sea of Japan coast only occasionally, with their sounds being detected about once every 10 days, Science X reported.The research, published in the journal Marine Mammal Science, focused on Wakasa Bay near Obama City and Aso Bay near Tsushima City.
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