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Wild dolphins in Florida use unique signature whistles like names, especially when alone or in murky water, a study shows.
A long-running study of bottlenose dolphins in Sarasota, Florida, has found that wild dolphins use unique signature whistles—similar to names—to identify themselves, especially in isolation or low-visibility conditions.
Researchers recorded nearly 1,000 whistle sessions from over 300 individuals using hydrophones attached during health checks, confirming that about 85% of whistles in isolation are signature whistles.
Dolphins modify their whistles when speaking to calves, a behavior akin to human "motherese," and may copy others’ whistles to initiate contact.
Females tend to keep stable whistles over time, while males may change theirs, especially during long-term male bonds.
The study also revealed shared non-signature whistles used by multiple dolphins, suggesting complex social communication.
The research, ongoing since 1970, remains the world’s longest study of wild cetaceans.
Los delfines salvajes en Florida usan silbidos únicos como nombres, especialmente cuando están solos o en aguas turbias, muestra un estudio.