What is a 'fish doorbell' that solves the problem of floodgates that hinder the movement of fish?
In a canal in the Netherlands, at the turn of the season, fish move through the canal for breeding and other purposes. However, the locks installed there obstruct the traffic of fish, so the lock manager had to visually check each time a fish visited and open and close the lock on a regular basis. To improve this situation, biologists have devised a 'doorbell for fish' system.
About the fish doorbell --visdeurbel
Utrecht krijgt de eerste visdeurbel ter wereld (en dit is geen 1 aprilgrap):'Bij de sluis ontstaat een vissenfile' | Utrecht | AD.nl
https://www.ad.nl/utrecht/utrecht-krijgt-de-eerste-visdeurbel-ter-wereld-en-dit-is-geen-1-aprilgrap-bij-de-sluis-ontstaat-een-vissenfile~ adfd2019 /
The doorbell for fish is located at the lock on the Vecht Canal in the Dutch city of Utrecht. This lock is normally closed, but it is necessary to open and close the lock several times a day because fish come and go at the turn of the season.
However, the lock manager cannot keep an eye on the situation. So Utrecht biologists Mark van Heukelum and Anne Nijs have devised a unique system to inform lockgate managers that fish have arrived.
The system is to install an underwater camera at the floodgate and open the live video to the public online, and the person who confirms the appearance of the fish in the video notifies the manager of the floodgate of the arrival of the fish.
To use this system, first visit the live camera page. The page shows live footage underwater and a red 'doorbell' button.
If you see a fish in the video, stop the video and press the doorbell button.
Then, a list of fish that live in the Fecht Canal this season will be displayed below the video, so click the fish that you think 'this is the fish in the video' and click 'Versturen' on the right. To do.
If the words 'Bend ankt voor je inzending! (Thank you for submitting!)' Appear, it is successful and the image is reported to the floodgate administrator. If a sufficient number of reports are made, the floodgate will be opened.
Heukelum and colleagues have long been working on a project to make the fish in the canal known to the Utrecht population. Heukelum said he wanted to see what kind of fish were swimming in the canal while talking to the lock manager. Heukelum says that the reason why we decided to use this kind of labor-intensive system instead of an automatic sensor is 'because it is a way for Utrecht residents to have fun and learn about fish.'
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