Fish passes

Definition (http://en.wikipedia.org/wiki/Fish_pass)

A fish pass is a structure on or around artificial barriers (such as dams and locks) to facilitate diadromous fishes' natural migration. Most fish passes enable fish to pass around the barriers by swimming and leaping up a series of relatively low steps (hence the term ladder) into the waters on the other side. The velocity of water falling over the steps has to be great enough to attract the fish to the ladder, but it cannot be so great that it washes fish back downstream or exhausts them to the point of inability to continue their journey upriver. (Wikipedia)

Preferred Units: N/A

Scope Note:
N/A

This term is used for the following terms: 
Fish ladder
Fish pass
Fishways

Approved Date
18-Jan-2013

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