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Found 2 translations.
| Name | Current message text |
|---|---|
| h English (en) | Beluga calves do not begin life with the adult repertoire fully formed. A longitudinal study of one captive male recorded low-energy broadband pulse trains within his first hour after birth. Rudimentary whistles appeared at about two weeks, whistle production increased substantially in the second month, and mixed tonal–pulsed calls became consistent at about four months. The calf's calls gradually became more stereotyped over months and years.<ref name="development">Vergara, V., and Barrett-Lennard, L. G. (2008). [https://doi.org/10.1578/AM.34.1.2008.123 Vocal development in a beluga calf (''Delphinapterus leucas'')]. ''Aquatic Mammals'' 34(1): 123–143.</ref> |
| h Japanese (ja) | シロイルカの子は、成体の発声レパートリーを完成した状態で生まれるわけではない。飼育下の雄1頭を縦断的に調べた研究では、出生後1時間以内に低エネルギーの広帯域パルス列が記録された。原始的なホイッスルは約2週齢で現れ、生後2か月目にはホイッスルの産出が大幅に増え、約4か月齢ではトーナル成分とパルス成分が混在するコールが安定して現れた。子のコールは数か月から数年をかけて、徐々に定型性を増した。<ref name="development">Vergara, V., and Barrett-Lennard, L. G. (2008). [https://doi.org/10.1578/AM.34.1.2008.123 Vocal development in a beluga calf (''Delphinapterus leucas'')]. ''Aquatic Mammals'' 34(1): 123–143.</ref> |