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fish ladder
(redirected from Fish ladders)

    Also found in: Wikipedia 0.15 sec.
fish ladder
n.
A series of pools arranged like ascending steps at the side of a stream, enabling migrating fish to swim upstream around a dam or other obstruction.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.fish ladderfish ladder - a series of ascending pools providing a passage for salmon to swim upstream past a dam
passage - a way through or along which someone or something may pass


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Despite special fish ladders and other bypass devices, dams alter the habitat, impede fish migrations, kill many young, seaward-migrating fish in hydroelectric turbines, and expose species to predation that they wouldn't typically encounter in a free-flowing river.
Tales of the undammed: removing barriers doesn't automatically ... by Francisco, Edna / Science News
Mostly, fish ladders have proved successful in allowing adult salmon to migrate past dams, but don't provide a downstream path for migrating juveniles.
Saving salmon why care? Dams serve vital human needs but may harm ... by Hamel, Owen Sprague / Science World
Within the city limits, Longfellow, Thornton, Taylor, and Piper creeks are slated for restoration, and in the Cedar River watershed Mayor Schell is calling for both a halt to logging and reforms such as closure of logging roads, construction of fish ladders, and guaranteed in-stream flows.
Emerald cities by Dietrich, William / American Forests
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