anadromous

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anadromous

[ə′na·drə·məs]
(vertebrate zoology)
Said of a fish, such as the salmon and shad, that ascends fresh-water streams from the sea to spawn.
References in periodicals archive ?
One of these projects is construction of a fish ladder to restore fish migration up the river.
toxicus growth (8) and are likely to alter fish migration patterns.
The environmental considerations were significant as works could only be carried out between May and September when river levels are lower; fish migration dictated that the fish pass over the weir could only be blocked during July -the River Severn is a Site of Special Scientific Interest.
Because of [that threat], we will continue to explore alternatives that may be used in the future to prevent fish migration up Quartz Creek without destroying the wilderness qualities of the area.
Research institutes in Japan, Canada, Russia and the United States will study plankton, ocean streams and fish migration in the Bering Sea during the five-year study, they said.
During the low flow period, a sand bar forms at the mouth of the Santa Clara River estuary forming an intermittent barrier to fish migration to or from the ocean.
Also, researchers should first determine if there are definite barriers to fish migration and a river's navigability before using radio telemetry to locate cool-water refuges.
But Rindge said the dam's removal would give the steelhead only an additional 200 to 300 yards of unfettered stream, since a steep waterfall above the dam precludes farther fish migration.
The fish migration and temperature data allowed us to test the hypothesis that sockeye salmon and American shad would respond differently to environmental change in a manner predicted by their life history patterns.