Southern baleen whale moms steer their calves to shallow waters, wherever newborns square measure less probably to be picked off by associate degree sea wolf. There, unmitigated waves mask the occasional quiet calls that the pairs build. which will facilitate the whales remain while not broadcasting their location to predators, researchers report Gregorian calendar month eleven within the Journal of Experimental Biology.
While most whale calls square measure meant to be long-range, “this shows U.S. that whales have a kind of intimate communication furthermore,” says Mia Nielsen, a activity life scientist at city University in Scandinavian nation. “It’s solely meant for the whale right next to you.”
Nielsen and colleagues labeled 9 mater whales with audio recorders and sensors to live motion and water pressure, and additionally recorded close noise within the nearshore setting. once the whales were submerged, below the buzzing waves, the scientists might acquire the quiet calls, soft enough to fade into the background roughly two hundred meters away.