In the spring, fish like perch travel through the rivers in the Netherlands to find places to spawn. They used to get stuck behind Weerdsluis lock: waiting for it to open. But not anymore! A virtual doorbell was created to help let the lock keeper know they're there. Hot tip, starting March 3, 2025, you can go to their website to hit the doorbell!!!!
Show Notes:
Youtube: Dutch Wall Fish
Scientific American article: Ring the Dam Doorbell
McGill Office of Science and Safety: Do Fish Drink
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