fish ladder
Upstream migration structure
A fish ladder is a series of ascending pools built alongside a dam or waterfall, allowing fish to bypass the obstacle during migration.
The stepped design lets fish leap from pool to pool, moving upstream to spawning grounds: Salmon use the fish ladder to reach their breeding waters.
Also called a fishway.
Unbroken forward movement
- currentDirected flow of charge
- waterfallDescending river over precipice
- rapidsTurbulent river section
- riverbedFloor beneath flowing water
streambed · watershed · riparian · fluvial · estuary · tributary · freshwater · aquatic
Pink-fleshed migratory fish
- spawningReleasing eggs to reproduce
- upstreamToward a river's origin
- anadromousMigrating upstream to breed
- steelheadAnadromous rainbow trout
shad · herring · lamprey · sturgeon · eel · journey · return · natal
Low river barrier
- damWater-holding barrier
- bypassRoute that skirts obstacles
- stepsSequential actions in process
- poolsBodies of still water
baffles · flume · culvert · spillway · gate · channel · structure · gradient
At risk of extinction
- speciesFinest taxonomic rank
- restorationReturning something to condition
- habitatOrganism's natural environment
- biodiversityRange of life forms
protection · sustainability · wildlife · stewardship · population · recovery · monitoring · preservation
flow
Unbroken forward movement
riverbed · streambed · watershed · riparian · fluvial · estuary · tributary · freshwater · aquatic · barrier
salmon
Pink-fleshed migratory fish
- spawningReleasing eggs to reproduce
- upstreamToward a river's origin
- anadromousMigrating upstream to breed
steelhead · shad · herring · lamprey · sturgeon · eel · journey · return · natal · homeward
weir
Low river barrier
pools · baffles · flume · culvert · spillway · gate · channel · structure · gradient · concrete
endangered
At risk of extinction
- speciesFinest taxonomic rank
- restorationReturning something to condition
- habitatOrganism's natural environment
biodiversity · protection · sustainability · wildlife · stewardship · population · recovery · monitoring · preservation · repopulation
- riverfrontriverbank, dock area, riverboat, boat launch, river walk
- fish migrationupstream migration, migratory routes, seasonal migration, outmigration
- Pacific Fishingsteelhead, chinook, sockeye, coho, king salmon
- salmon fisheriessalmon fishing, chinook salmon, coho salmon, sockeye salmon, pink salmon
- salmon fishingsalmon fishing, salmon, chinook, sockeye, coho
- spawningspawning, spawning season, spawning ground, spawning grounds, spawning bed
fish ladderdam
Water-holding barrier
weir · hydroelectric dam · concrete dam · culvert · spillway