Assertion: dolphin's signature whistle | /r/CapableOf | remain throughout its life
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text: It has been determined that individuals develop a specific “signature whistle” within the first few months of life and that this signature whistle remains the same throughout its life.
text: Animal Fact It has been determined that dolphins develop a specific "signature whistle" within the first few months of life and that this signature whistle remains the same throughout their life.