Sentence examples for blocked fish from inspiring English sources

However, operation of the dams has led to environmental problems in both rivers because they have caused unnatural flow fluctuations, blocked fish migration, flooded fertile agricultural land, and forced over 2,000 people to relocate.

For Upper Bonnington, the first dam built on the river, the original goal was to improve navigation between Kootenay Lake and the Kootenay's mouth on the Columbia by drowning the dangerous Bonnigton Falls rapids that also blocked fish migration, and hopefully introducing fish to the upper river by constructing a fish ladder.

This change in early survival rate 'rescued' the Open system except in the most extreme case of blocking access to both tributaries and removing the blocked fish (Table S3).

Landsburg Diversion Dam, at river km 35.1, blocked fish migration from 1901 to fall 2003, when modifications to the dam enabled salmon to recolonize approximately 33 km of habitat above the dam on their own volition.

These conduits block fish migration to and from the Willamette River except on Miller Creek, where the conduits are short and have been modified to assist the fish.

- S 982 (a.k.a. the Freedom to Fish Act) stops the Army Corps of Engineers from blocking fishing access on part of the Cumberland River in Tennessee and Kentucky.

Salmon habitat has long been in decline because of logging, mining and development along salmon bearing waters; hydropower, in the form of vast dams, has commonly blocked the fish's passage to spawning grounds upriver; and aggressive harvest, or fishing, decimated salmon runs.

If ion exchange is blocked in fish, he says, "eventually they're just as dead as if they didn't have oxygen".

With the completion of the Gezhouba Dam in 1981, the migration route of A. sinensis to the historic spawning areas in the upper Yangtze River and lower Jinsha River was blocked, and fish were restricted to the middle and lower reaches of the Yangtze River (approximately 1,675 km river length, rkm 0 is at the estuary) (Figure 2) ([Wei et al. 1997]).

By 1940, the dam had deteriorated to the point that it no longer blocked migratory fish.

Native fish species include chinook and coho salmon, steelhead, coastal cutthroat trout, Pacific lamprey, and rainbow trout, but since 1922 the headworks dam or its successor, Dam 2, have blocked anadromous fish passage to the upper river and its tributaries.