A couple of months ago, we wrote about a remarkable online “fish doorbell” or visdeurbel that allows spawning fish to swim through the canals of Utrecht in the Netherlands unobstructed by the Weerdsluis lock. The system is comprised of an internet-connected underwater camera … [Read more...] about Update: Holland’s fish doorbell is a worldwide hit!
Every year, thousands of spawning fish swim through the canals of Utrecht in the Netherlands. When they reach the Weerdsluis lock though, they often cannot travel further because the barrier — which acts as a dam — is rarely open. A new initiative, however, is now allowing … [Read more...] about Dutch citizens are using a “doorbell” to help fish pass this canal gate