Press Release: A Software to See How Fish See
Software for behavioral studies in fish made freely available by Tübingen neuroscientists
At a glance, it would seem that the glassily-transparent, millimeter-long larva of a popular ornamental fish from South Asia has very little in common with a human being. Nevertheless, in recent years zebrafish have risen to popularity as one of the most widely used object of study with researchers interested in the basic mechanisms of perception. One example among many is eye motor control: when they move their eyes to follow mobile visual stimuli, zebrafish employ mechanisms very similar to those in the human visual system.
But in order to see how a fish sees, researchers must invest in extremely elaborate laboratory equipment – a fact of life in much of life science. One important component of this equipment is the software solutions to obtain and measure the numerous parameters the researchers are looking for. Quite often, they face a sort of agony of choice here: on one hand, they could use commercially available software, which rarely does precisely what a given research group needs for their specific angle of investigation. Moreover, such commercial solutions for tracking eye movements in fish are available only at great expense. On the other hand, the lab group could program their own applications ‒ besides requiring good programming skills, this often takes years of dedicated work.
When neurobiologist Aristides Arrenberg faced this dilemma during his years as a doctoral student, he decided to develop his own software suited to his project’s needs. Today he heads a research group at the CIN in Tübingen, which still uses a version of this software, retooled and expanded over the years. By now it has picked up a lot of additional functionality, being able to control individually tailored light stimuli presented to fish larvae, and to automatically register, track and record their eye movements, even perform real-time analyses. On top of that, there are plugins for laser and microscope usage, as well as a graphical user interface optimized for ease of use. The researchers have decided to make their software – which they call ‘ZebEyeTrack’ – freely available to all laboratories studying the visual system of zebrafish.
"Naturally, researchers worldwide have very specific requirements for their software solutions. For this reason we are sharing the source code, so that anybody with a little programming skill can adapt it to their individual needs", explains Florian Dehmelt, who programmed the (for now) final version. Research group leader Arrenberg adds: "With ZebEyeTrack, we are part of the Open Source movement. We could probably have filed for a patent and sold ZebEyeTrack commercially. But we are not interested in doing so – after all, we would be continuing the very same problem that got us started in the first place.
- Werner Reichardt Centre for Integrative Neuroscience