1. Inhalt
  2. Navigation
  3. Weitere Inhalte
  4. Metanavigation
  5. Suche
  6. Choose from 30 Languages

Environment

Why fish need ladders

Upstream and downstream - some fish need to migrate over long distances. But weirs, dams, locks and other manmade obstacles block their way. Monorails, ladders and even elevators help fish get where they need to go.