Salmon - 14 of 20
Salmon FAQs - 20 Found
Many man-made objects hurt salmon by blocking their migration route or making migration much more difficult. Dams on rivers are the main obstacle to salmon migration. Other man-made objects are designed to help salmon, like fish ladders. Fish ladders help the adult salmon migrate up a river and usually work very well. Dams are more of a problem for small salmon migrating downstream because they end up going through the turbines if they can't find the passages placed in the dam to help them. Roads across and alongside streams can be a problem if dirt from the road clogs up the gravel in the stream.