Advertisement

Follow Mint Lounge

Latest Issue

| Log In / Register

Home > Smart Living> Environment > Faint to ferocious: The suction power of an elephant's trunk

Faint to ferocious: The suction power of an elephant's trunk

Elephants are known for their versatile trunks. Now, a new study reveals how they can also switch to vacuum mode to eat

Georgia Tech mechanical engineering Ph.D. student Andrew Schulz. A team from the Georgia Institute of Technology observed the world's largest land mammal suck up rutabaga, draw chia seeds out of water, and pick up large tortilla chips without breaking them.
Georgia Tech mechanical engineering Ph.D. student Andrew Schulz. A team from the Georgia Institute of Technology observed the world's largest land mammal suck up rutabaga, draw chia seeds out of water, and pick up large tortilla chips without breaking them. (Andrew Schultz, Georgia Tech)

Elephants are known to use versatile trunks to grab objects big and small, drink great draughts, and sniff out water kilometres away.

ADVERTISEMENT

ADVERTISEMENT

But a tusker's proboscis can also switch to vacuum mode to eat, with suction power ranging from faint to ferocious, researchers said in a new study on Wednesday.

MORE FROM THIS SECTION

view all

A team from the Georgia Institute of Technology observed the world's largest land mammal suck up rutabaga, draw chia seeds out of water, and pick up large tortilla chips without breaking them. The scientists reported their findings in the Journal of the Royal Society Interface. Up to now, it was thought that only fish exhibited this kind of suction prowess.

Also read: A south Indian wildlife safari beyond tigers and leopards

ADVERTISEMENT

ADVERTISEMENT

Experiments were carried out with the help of a 34-year-old female African elephant from Zoo Atlanta, including tests to see how she would deal with rutabaga chunks of varying size and number.

They observed that while the elephant used its sensitive prehensile tip to grab on to big chunks, she preferred suction to consume larger quantities of smaller pieces.

"A loud vacuuming sound accompanies the suction as food is quickly drawn onto the tip of the trunk," a team led by David Hu, Georgia Tech wrote. "An elephant uses its trunk like a Swiss Army Knife," said Hu, in a news release. "It can detect scents and grab things. Other times it blows objects away like a leaf blower or sniffs them in like a vacuum."

ADVERTISEMENT

ADVERTISEMENT

The elephant chose not to use vacuum power, however, when offered grains of bran measuring about 1 millimetre, "presumably to avoid getting the grains lodged in its trunk," the study noted.

"Instead, the trunk tip squeezed the bran together to pick them up."

Young African elephants roam in the Africam Safari Zoo in Puebla, Mexico, June 5, 2012. Experiments for this study were carried out with the help of a 34-year-old female African elephant from Zoo Atlanta.
Young African elephants roam in the Africam Safari Zoo in Puebla, Mexico, June 5, 2012. Experiments for this study were carried out with the help of a 34-year-old female African elephant from Zoo Atlanta. (REUTERS)

Precision and power

The study found that elephants generate suction force not only by using their huge lungs, but also by increasing the diameter of their nasal passages.

Using ultrasound imaging, the scientists watched the elephant use muscle contractions to dilate its nostrils up to 30 percent, increasing trunk capacity more than 60 percent.

By observing the elephant drinking water from a container with chia seeds at the bottom, they were able to calculate that she sucked in the fluid at a flow rate equivalent to 24 shower heads at once.

ADVERTISEMENT

ADVERTISEMENT

The elephant inhaled at speeds nearly 30 times faster than a human sneeze. The suction ability displayed was not just powerful, but precise.

In one test, researchers placed a tortilla chip on the flat surface of a force plate, which measures movement strength. Weighing in at about 100 kg (220 pounds), the elephant's trunk could smash the chip with very little pressure. But instead of grabbing it, the elephant applied suction near to or directly on the chip to guide it into its sensitive prehensile "fingers".

Recently born elephant calf 'Jack' walks near his mother 'Nina' in their enclosure at the animal park 'Le PAL' at Dompierre-sur-Besbre, central France on May 22, 2021. The study notes how elephant trunk mechanics have already influenced existing technologies, citing robots that refuel ships or deliver air or water to victims trapped under debris.
Recently born elephant calf 'Jack' walks near his mother 'Nina' in their enclosure at the animal park 'Le PAL' at Dompierre-sur-Besbre, central France on May 22, 2021. The study notes how elephant trunk mechanics have already influenced existing technologies, citing robots that refuel ships or deliver air or water to victims trapped under debris. (AFP)

Despite the chip's hard-to-grab thinness and fragility, the elephant "could usually pick it up without breaking it". "An elephant eats about 400 pounds of food a day, but very little is known about how they use their trunks to pick up lightweight food and water for 18 hours, every day," said Georgia Tech mechanical engineering Ph.D. student Andrew Schulz. "It turns out their trunks act like suitcases, capable of expanding when necessary," Schulz adds in the release.

ADVERTISEMENT

ADVERTISEMENT

The laboratory that conducted the study specialises in biomechanics, with particular interest in how animal behaviours can influence the development of robot technology.

The study notes how elephant trunk mechanics have already influenced existing technologies, citing robots that refuel ships or deliver air or water to victims trapped under debris.

Also read: Drones come to the rescue of wildlife species

(With inputs from AFP)

LATEST ISSUES

ADVERTISEMENT