Rare Footage Captures Whales Supporting Mother During Birth
In a groundbreaking scientific discovery, researchers have documented a sperm whale giving birth while other female whales collaborated to assist the mother and her newborn. This rare event, filmed off the coast of Dominica in the Caribbean, offers unprecedented insights into whale behavior and social structures.
Unprecedented Observation in the Wild
On July 8, 2023, a team from Project Ceti, an international initiative focused on decoding whale communication, encountered a pod of 11 whales near Dominica. Among them was a 19-year-old female named Rounder, who was surrounded by family members and other whales as she prepared to give birth to her second calf. Over nearly five and a half hours, the scientists meticulously observed the group, using boats, drones, and underwater audio recordings to capture every detail.
The data, published in the journals Scientific Reports and Science, highlights the exceptional rarity of this event. Out of 93 cetacean species, which include whales, dolphins, and porpoises, only nine have been observed giving birth in the wild. Even more remarkable was the involvement of unrelated whales in the birth process, a behavior previously undocumented in non-primates.
Birth Assistance and Social Coordination
Shane Gero, a member of the Project Ceti team, emphasized the significance of this finding, stating, "This is the first evidence of birth assistance in non-primates. It is fascinating to see the intergenerational support from the grandmother to her labouring daughter, and the support from the other, unrelated females." The birth itself lasted 34 minutes, from the initial emergence of the calf's tail to its full delivery.
During labor, adult females positioned themselves under Rounder's dorsal fin, often on their backs with heads directed toward her genital slit. Immediately after the birth, the pod's behavior shifted dramatically, with all adults actively engaging with the newborn. They squeezed the calf between their bodies, touched it with their heads, and used their noses to push it around, both underwater and above the surface.
Evolutionary Adaptations and Survival Strategies
This cooperative behavior, dating back over 36 million years, is linked to the unique evolutionary history of cetaceans. As the only mammals to have returned to the ocean after adapting to land life, whales developed specific traits to ensure newborn survival. For instance, whale calves are born tail-first to prevent drowning, but newborn sperm whales still sink initially. The assisting whales lift the calf to facilitate its first breaths and prevent sinking, a critical intervention for survival.
Primates, including humans, are the only other mammals known to assist during birth, making this discovery a significant parallel in animal behavior. The researchers also noted changes in vocalizations among the whales during key events, such as when pilot whales approached the pod post-birth. These vocal shifts suggest coordinated efforts to support the birth and protect the newborn.
Long-Term Implications and Future Observations
Sperm whales have one of the longest pregnancies in the animal kingdom, lasting up to 16 months, with calves born measuring about 4 meters (13 feet) long. They rely on their mother's milk for at least two years and become central figures in their pod's social unit, often receiving babysitting support from others while the mother forages for food.
After the 2023 filming, the pod was not seen for over a year until the newborn was spotted with other young members, Accra and Aurora, on July 25 last year. Surviving the first year is a positive indicator for reaching adulthood, according to the Project Ceti team. This observation not only enriches our understanding of marine life but also underscores the importance of continued research into whale communication and social dynamics in the wild.
