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Vacuum tube shoots salmon over dams


Vacuum tube shoots salmon over dams

Biologists in central Washington were concerned about humanmade dams blocking salmon and other fish from their natural habitats. So Whooshh Innovations adapted a vacuum-pressurized tube system for fish travel, using the pressure difference created when the tube’s flexible membrane molds to the fish. With the fish’s body acting as a seal, the fish zips from an area of high pressure behind it into the low-pressure area ahead. Yakama Nation Fisheries staff members tested the system in early June by safely transporting 90 fish from a collection area inside a building to a tanker truck outside, High Country News reports.

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