spawning bed造句
例句与造句
- For every female on the spawning bed, there is a minimum of 2 males that are used to successfully reproduce.
- Unlike last year, however, Canada is not talking about taking fish, but how to get more Canadian salmon to their spawning beds.
- In the inland waters of North America, a typical spawning bed will consist of a series of concrete boxes filled with aggregate gravel.
- Claiming damage to salmon spawning beds, environmental and native groups are suing Cominco, a major mining company, for using hovercraft on the Stikine River.
- In addition, pesticides and fertilizers can be expected to make their way into the plant and animal food chain and the salmon spawning beds.
- It's difficult to find spawning bed in a sentence. 用spawning bed造句挺难的
- Located near the primary trout spawning bed for western Lake Superior, Brule is a destination for serious fly fishermen from the around the world.
- Many could be harmed in years ahead as denuded streams overheat and fire-scorched slopes dump sediment and mudslides onto gravel spawning beds, suffocating fish eggs.
- In fishery management, a spawning bed is an artificial bed constructed by wildlife professionals in order to improve the ability of desired game fish to reproduce.
- In one of nature's classic " Mr . Mom " scenarios, it tends to the spawning bed and protects the fry for their first month of life.
- It also has blocked steelhead from returning upriver to spawning beds, dropping the population from 2, 000 a year before the dam was built to about 100 today.
- Robust redhorses, which belong to the sucker fish family, vanished from Georgia rivers in the mid-1800s, most likely because silty runoff from cotton plantations buried their gravel spawning beds.
- Fish stocks have slumped from a variety of causes, from unusually warm water from El Nino disrupting the Pacific food chain to erosion on logged slopes choking salmon spawning beds inland.
- But his government has created 161 provincial parks, and has lately scrambled to protect grizzly bear habitat in northern B . C . and salmon spawning beds of the Cowichan River on Vancouver Island.
- "The other half of the equation is to get adult salmon back from the Pacific Ocean to their spawning beds, " said Anderson, a longtime conservationist who represents Victoria in Canada's House of Commons.
- The single most effective step to restore depleted Northwest salmon runs is to tear down two dams that block spawning beds on the Elwha River on Washington state's Olympic Peninsula, Interior Secretary Bruce Babbitt says.