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Scientists Witness Rare Sperm Whale Birth in Caribbean

Scientists from Project CETI observed a rare sperm whale birth near Dominica on July 8, 2023. The event involved the mother 'Rounder' and her social group, Unit A, with coordinated support from both related and non-kin whales. The 33-minute birth included lifting the newborn and extensive vocal communication, documented via drones and acoustics. Published in March 2024, the study combines new footage with long-term data to reveal collective birthing behaviors. Experts highlight this as evidence of advanced social cooperation in sperm whales, enhancing understanding of marine mammal societies. The findings also complement Indigenous whale knowledge and underscore interspecies social parallels.

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Scientists Witness Rare Sperm Whale Birth in Caribbean

On July 8, 2023, a research team from Project CETI documented the rare live birth of a sperm whale near Dominica, revealing complex social cooperation among the marine mammals.

The Observation

  • The event took place in the eastern Caribbean waters off Dominica.
  • Marine biologist Shane Gero and the Project CETI team were studying Group A, a pod of primarily female sperm whales with long-term monitoring data.
  • A blood plume initially concerned researchers, but it signaled the birth as a newborn's head emerged.

The Birth Process

  • The birth spanned 33 minutes, from 11:12 a.m. to 11:45 a.m. local time.
  • The mother, identified as "Rounder" (at least 19 years old), was supported by other Unit A whales.
  • Whales nuzzled, rolled, and repeatedly lifted the newborn to the surface for breathing, with the umbilical cord severed within minutes.
  • The calf began swimming shortly after, though lifting behavior continued for hours.
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Social Dynamics

  • Multiple females, including non-kin such as juvenile "Ariel," actively participated in assisting the newborn.
  • A young male, "Allan," who was transitioning out of the all-female group, was present but largely ignored by others.
  • Whales emitted 31,364 clicks over four hours, with coda patterns associated with social identity and bonding, particularly during and after the birth.

Scientific Findings

  • The observation was published in two papers on March 26, 2024, in Science and Scientific Reports.
  • Researchers used drone footage and acoustic recordings, analyzed with machine learning to track whale identities and interactions.
  • This marks the first study to integrate audio-video data with decades of social relationship records for sperm whales.

Expert Reactions

  • Giovanni Petri of Project CETI stated that birth coordination details were previously unknown.
  • Mauricio Cantor, an unaffiliated behavioral ecologist, emphasized that sperm whale birth is a collective group effort, not solely a mother-calf event.
  • Christine Clarke noted Allan's behavior provided insights into the complex social transitions of young males.

Significance

  • The rare sighting offers unprecedented data on cetacean social structure, communication, and cooperative behavior.
  • It bridges Western scientific research with Indigenous knowledge of whales.
  • Ongoing studies aim to further understand sperm whale societies and their implications for broader biological and social sciences.
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