fish ladder

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fish ladder

A series of artificial pools arranged like ascending steps, enabling migrating fish to swim upstream around a dam or other obstruction.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

fish ladder

(Fishing) a row of ascending pools or weirs connected by short falls to allow fish to pass barrages or dams

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

fish′ lad`der

a series of ascending pools constructed to enable salmon or other fish to swim upstream around or over a dam.

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Noun

fish 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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References in periodicals archive ?

Gone could be the tiresome days of negotiating fish ladders like the one at the Pitlochry Dam on the River Tummel in Perthshire.

THE FISH FLINGER; YANKS TRIAL WATER 'CANNON' TO PROPEL SPAWNING SALMON OVER OBSTACLES Invention offers 'stress-free' way to get upstream

15 so federal contractors can repair two fish ladders. In May, the BLM had announced that the area would be closed beginning July 1.

Buzzworthy

Mohammad Azam further said new barrage would have two abutments, 62 piers and a new head regulator, one road bridge and two divide wall alongwith fish ladders for fish migration.

New Khanki Barrage's construction to be completed by June 2017

International Development Association (IDA) will lend $ 191 million for rehabilitation of Guddu Barrage, whose total cost is approximately $ 209 million.Guddu Barrage irrigates over a million hectares in Jacobabad, Larkana, Sukkur and Naseerabad districts through Ghotki Feeder and Rainee canals on left and Begari Sindh Feeder and Desert Pat Feeder canals on right side of the river.The barrage incorporates two fish ladders and is also used for flood management.

IDA to lend $191m

Those two rivers were chosen because of constructing dams ceasing migration routes for migrating salmonids, however, later constructed fish ladders in both rivers benefited for the partial reoccupation of upstream spawning grounds.

Impact of small hydro-power plants on salmonid fishes spawning migrations/Mazuju hidroelektriniu itaka lasisiniu zuvu nersto migracijai

Those factors include diseases, fisheries and man-made structures such as dams and fish ladders.

Scientists establish formula for predicting climate change impact on salmon stocks

In response to this problem, Bonneville and some of the other Columbia dams have installed fish ladders so spawning salmon can swim past the man-made obstructions.

Sacrificing sea lions for salmon

Whereas many hydroelectric plants feature fish ladders that allow spawning salmon to cross over the dam, the four Klamath dams up for relicensing lack even this dubiously effective technology.

Restoring salmon nation: demolishing dams on the Klamath River

Dams are being removed in the Acushnet River, and several existing fish ladders throughout the state are being improved.

Herring runs good way to connect with nature

At this site, the 511th cleaned gate seals, installed water-level gauges for the fish ladders, and removed debris from the upriver trash racks (a cagelike attachment that collects large debris).