The great ocean is the scene of many mysteries and one of them has been animating scientific discussions for some time: how do cetaceans-barrels and dolphins-interact with each other? As reported by an article by the National Geographic monthly, a recent study offers a new look at marine social life and the relationships between these animals, acts of play, curiosity and complicity.
After having collected and analyzing 199 interactions between dolphins and whales, involving nineteen different species, researchers believe that many of these meetings would be marked by a positive attitude, a possible sign of play or mutual interest. Observations also reveal that in 80% of cases, dolphins evolve near the heads of whales, as if to attract their attention or start a silent dialogue.
Dolphins employ various strategies to interact, sometimes surfing on the wave generated by the displacement of whales, rubbing their bodies or looking for direct contact. The whales, in response, do not always remain passive: some roll on themselves, exhibit their belly or deploy their fins in the direction of the dolphins-which is assimilated to socialization or parade.
The humpback whales are distinguished: they are among the most inclined to respond, even to meet the dolphins. Scientists have even observed whales delicately raising dolphins with their rostrum (name given to the muzzle of certain cetaceans), in a gesture that intrigues as much as it fascinates. Nevertheless, not all species participate with the same enthusiasm: the case of blue whales (or Norroises), which remain more indifferent, is notably indicated.
When the game becomes rivalry
But this sweetness is not the only face of relationships between cetaceans. In England, dolphins have already been observed killing porpoises before abandoning the carcasses – a behavior perceived as a game but revealing a very strong share of aggressiveness. These interactions demonstrate the ambiguity of the social relationships maintained by these cetaceans.
The game promotes cognitive and social development of dolphins as whales. In dolphins, it strengthens links and facilitates hunting, food and reproduction. As for the observation of the playful and social behavior of whales, it could help to better understand their distribution in order to carry out effective preservation campaigns.
In the 1970s, the discovery of whale songs moved the public and strengthened the protection of cetaceans. Minder that they play very regularly, in the same way as humans, could create a new form of connection and empathy towards these giants of the seas.