Giant Tortoises Have Good Memories

December 4, 2019

Color discrimination: Female Galapagos tortoise performing correct trial. Note the visual barrier in the background

Tamar Gutnick, Anton Weissenbacher, Michael J. Kuba

Aldabra (Geochelone gigantea) and Galapagos (Chelonoidis sp.) tortoises are trainable in certain respects and have long memories, according to new research from Okinawa Institute of Science and Technology and the Hebrew University and Tiergarten Schönbrunn, Maxingstrasse.

Researchers Tamar Gutnick, Anton Weissenbacher and Michael Kuba initially believed that the tortoises retained good memory because of the long distances that they traveled on the Galapagos and Aldabra islands. They figured that the tortoises had to remember the paths that they traveled. So, the researchers conducted training exercises with both species of tortoises living in zoos, teaching them to bite on the same colored ball that was attached to a stick.

New Galapagos Tortoise Species Discovered And Described

When they bit the correct colored ball, they received a reward, but when the wrong ball was bit, they did not. 

More than three months after the initial exposure to the colored balls, the tortoises were then presented with the same balls and sticks. The tortoises remembered the training and picked the correct ball. Nine years later, the researchers went back to see the tortoises at the zoos and exposed them to the balls, and each of the tortoises picked the correct ball without having to remind them in any way. 

The researchers also noted that the tortoises seemed to learn faster in groups, suggesting that the tortoises learned from their fellow chelonians.

An astract of the paper "The underestimated giants: operant conditioning, visual discrimination and long-term memory in giant tortoises," can be read on the Animal Congition/Springer website. 

Related Articles

Earliest Reptile Footprints

The earliest evidence for the existence of reptiles has been found in Canada.

How Tadpoles Optimize Their Buoyancy

Tadpoles are well-equipped to adjust their buoyancy in the water.

Blood and Short-tailed Python Care Sheet

The best blood and short-tailed python care and information.

Add your comment:
Edit ModuleShow Tags
Edit ModuleShow Tags Edit ModuleShow Tags
Edit Module

Cast Your Vote

Do you plan on any additions to your collection?


Edit ModuleShow Tags Edit ModuleEdit Module

Find Us On facebook

Edit ModuleShow Tags