Scientists have taught a goldfish to drive a robotic car in an experiment to assess its innate navigational abilities and further explore animal behaviour.
The robotic driving setup built by scientists from Ben-Gurion University in Israel consists of a set of wheels under a goldfish tank with a camera system to record and translate the fish’s movements into forward, back and side-to-side directions to the wheels.
In the study, published last month in the journal Behavioural Brain Research, they tested whether the fish could navigate by placing a clearly visible target on the wall opposite the tank.
Since navigation plays an important role in the animal kingdom, the scientists wanted to explore if there are universal properties independent of species, ecology and brain structures.
They sought to understand if a species embedded in the environment of another one could cope with an otherwise familiar navigation task.
“For this purpose, we trained goldfish to use a fish operated vehicle (FOV), a wheeled terrestrial platform that reacts to the fish’s movement characteristics, location and orientation in its water tank to change the vehicle’s position in the arena,” they wrote in the study.
After a few days of training they found that the fish could successfully drive the vehicle towards the target, hinting that its navigational ability supersedes its aqueous environment.
The scientists reported that the trained goldfish could “operate the vehicle, explore the new environment, and reach the target regardless of the starting point, all while avoiding dead-ends and correcting location inaccuracies”.
“The study hints that navigational ability is universal rather than specific to the environment,” Shachar Givon, a PhD student in the Life Sciences Department in the Faculty of Natural Sciences, said in a statement.
“Second, it shows that goldfish have the cognitive ability to learn a complex task in an environment completely unlike the one they evolved in,” Ms Givon added.
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