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fish ladder

   Also found in: Encyclopedia, Wikipedia 0.03 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.
fish ladder
n
(Life Sciences & Allied Applications / Fishing) a row of ascending pools or weirs connected by short falls to allow fish to pass barrages or dams
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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The area had been blocked for the past 50 years to steelhead migration, but was reopened in December 2004 with the help of a massive concrete fish ladder that allows the fish to swim higher up the river west of Ojai.
BRIEFLY by Daily News (Los Angeles, CA)
As well, a fish ladder was constructed, similar in nature to an underwater flight of stairs, connecting the lake to the downstream creek.
Moving a lake no easy task for miner by Larmour, Adelle / Northern Ontario Business
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
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