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Graham Lake (Maine)
Graham Lake in Hancock County, Maine is a eutrophic reservoir formed by the construction of a hydro-electric power dam in 1922 four miles (6 km) upstream from Ellsworth, Maine. The first dam was a hastily built earthen dam built by the Bangor Hydro Electric Company. It failed in 1923, flooding downtown Ellsworth and doing almost $8 million in property damage. The dam was rebuilt and operated by Bangor Hydro until its sale in 1999. The dam has since been acquired by PPL Corporation, which continues to use it to generate electricity. Water clarity in the lake is low, with secchi disk measurements averaging less than 3 meters. Fish in the lake that are of interest to anglers include smallmouth bass, white perch, chain pickerel, landlocked salmon The Atlantic salmon (''Salmo salar'') is a species of ray-finned fish in the family Salmonidae. It is the third largest of the Salmonidae, behind Siberian taimen and Pacific Chinook salmon, growing up to a meter in length. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hancock County, Maine
Hancock County is a county located in the U.S. state of Maine. As of the 2020 census, the population was 55,478. Its county seat is Ellsworth. The county was incorporated on June 25, 1789, and named for John Hancock, the first governor of the Commonwealth of Massachusetts. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (32%) is water. The county high point is Cadillac Mountain, 1527 feet, the highest summit on the U.S. Atlantic seaboard. Adjacent counties * Penobscot County — north * Washington County — northeast *Waldo County — west * Knox County — southwest Demographics 2000 census As of the census of 2000, there were 51,791 people, 21,864 households, and 14,233 families living in the county. The population density was 33 people per square mile (13/km2). There were 33,945 housing units at an average density of 21 per square mile (8/km2). The racial makeup of the county was 97.61% White, 0.25% Bla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Clarity
Water clarity is a descriptive term for how deeply visible light penetrates through water. In addition to light penetration, the term water clarity is also often used to describe underwater visibility. Water clarity is one way that humans measure water quality, along with oxygen concentration and the presence or absence of pollutants and algal blooms. Water clarity governs the health of underwater ecosystems because it impacts the amount of light reaching the plants and animals living underwater. For plants, light is needed for photosynthesis. The clarity of the underwater environment determines the depth ranges where aquatic plants can live. Water clarity also impacts how well visual animals like fish can see their prey. Clarity affects the aquatic plants and animals living in all kinds of water bodies, including rivers, ponds, lakes, reservoirs, estuaries, coastal lagoons, and the open ocean. Water clarity also affects how humans interact with water, from recreation and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Maine
The University of Maine (UMaine or UMO) is a Public university, public Land-grant university, land-grant research university in Orono, Maine. It was established in 1865 as the land-grant college of Maine and is the Flagship universities, flagship university of the University of Maine System. It is Carnegie Classification of Institutions of Higher Education, classified by Carnegie as among "R1: Doctoral Universities – Very high research activity". With an enrollment of approximately 11,500 students, UMaine is the state's largest college or university. The University of Maine's athletic teams, nicknamed the Maine Black Bears, Black Bears, are Maine's only NCAA Division I, Division I athletics program. Maine Black Bears men's ice hockey, Maine's men's ice hockey team has won two national championships. History The University of Maine was founded in 1862 as a function of the Morrill Land-Grant Colleges Act, Morrill Act, signed by President Abraham Lincoln. Established in 1865 as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brook Trout
The brook trout (''Salvelinus fontinalis'') is a species of freshwater fish in the char genus ''Salvelinus'' of the salmon family Salmonidae. It is native to Eastern North America in the United States and Canada, but has been introduced elsewhere in North America, as well as to Iceland, Europe, and Asia. In parts of its range, it is also known as the eastern brook trout, speckled trout, brook charr, squaretail, brookie or mud trout, among others. A potamodromous population in Lake Superior, as well as an anadromous population in Maine, is known as coaster trout or, simply, as coasters. The brook trout is the state fish of nine U.S. states: Michigan, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Vermont, Virginia, and West Virginia, and the Provincial Fish of Nova Scotia in Canada. Systematics and taxonomy The brook trout was first scientifically described as ''Salmo fontinalis'' by the naturalist Samuel Latham Mitchill in 1814. The specific epithet "''fontina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salmo Salar Sebago
The Atlantic salmon (''Salmo salar'') is a species of ray-finned fish in the family Salmonidae. It is the third largest of the Salmonidae, behind Siberian taimen and Pacific Chinook salmon, growing up to a meter in length. Atlantic salmon are found in the northern Atlantic Ocean and in rivers that flow into it. Most populations are anadromous, hatching in streams and rivers but moving out to sea as they grow where they mature, after which the adults seasonally move upstream again to spawn. When the mature fish re-enter rivers to spawn, they change in colour and appearance. Some populations of this fish only migrate to large lakes, and are "landlocked", spending their entire lives in freshwater. Such populations are found throughout the range of the species. Unlike Pacific species of salmon, ''S. salar'' is iteroparous, which means it can survive spawning and return to sea to repeat the process again in another year. Such individuals can grow to extremely large sizes, althoug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chain Pickerel
The chain pickerel (''Esox niger'') is a species of freshwater fish in the pike family (family Esocidae) of order Esociformes. The chain pickerel and the American pickerel (''E. americanus'') belong to the ''Esox'' genus of pike. Taxonomy French naturalist Charles Alexandre Lesueur described the chain pickerel in 1818. Its species name is the Latin word ''niger'' "black". Nicknames in the southeastern United States are the "southern pike", "grass pike", "jack", "jack fish", and "eastern pickerel". Description The chain pickerel has a distinctive, dark, chain-like pattern on its greenish sides. There is a vertical dark marking underneath the eye, which helps to distinguish the chain pickerel from redfin pickerel (''Esox americanus americanus'') and grass pickerel (''E. americanus vermiculatus''), in which the mark curves posteriorly. Its body outline resembles that of the northern pike (''E. lucius''). Unlike northern pike, however, the opercles and cheeks of chain pickerel are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Perch
The white perch (''Morone americana'') is not a true perch but is a fish of the temperate bass family, Moronidae, notable as a food and game fish in eastern North America. In some places it is referred to as "Silver Bass". The name "White perch" is sometimes applied to the white crappie. Generally silvery-white in color, hence the name, depending upon habitat and size specimens have begun to develop a darker shade near the dorsal fin and along the top of the fish. This sometimes earns them the nickname "black-back". White perch have been reported up to in length and weighing . Although favoring brackish waters, it is also found in fresh water and coastal areas from the St. Lawrence River and Lake Ontario south to the Pee Dee River in South Carolina, and as far east as Nova Scotia. They are also found in the lower Great Lakes, Finger Lakes, Long Island Sound and nearby coastal areas, Hudson and Mohawk River system, Delaware Bay and Chesapeake Bay. It is also found occasionall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secchi Disk
The Secchi disk (or Secchi disc), as created in 1865 by Angelo Secchi, is a plain white, circular disk in diameter used to measure water transparency or turbidity in bodies of water. The disc is mounted on a pole or line, and lowered slowly down in the water. The depth at which the disk is no longer visible is taken as a measure of the transparency of the water. This measure is known as the Secchi depth and is related to water turbidity. Since its invention, the disk has also been used in a modified, smaller diameter, black and white design to measure freshwater transparency. Similar disks, with a black-and-yellow pattern, are used as fiducial markers on vehicles in crash tests, crash-test dummies, and other kinetic experiments. History The original Secchi disk was a plain white disk and was used in the Mediterranean Sea. Today, a plain white, diameter Secchi disk remains the standard design used in marine studies. In 1899 George C. Whipple modified the original all-white Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PPL Corporation
PPL Corporation is an energy company headquartered in Allentown, Pennsylvania in the Lehigh Valley region of eastern Pennsylvania. The company is publicly traded on the New York Stock Exchange. History Pennsylvania Power & Light was founded in 1920 out of a merger of eight smaller Pennsylvania utilities. It gradually extended its service territory to a crescent-shaped region of central and northeastern Pennsylvania stretching from Lancaster through the Lehigh Valley into Scranton and Wilkes-Barre. In 1995, it reorganized as a holding company, PP&L Resources, which changed its name to its current name, PPL Corporation, in 2000. The company limited its activities to Pennsylvania until deregulation of electrical utilities in the 1990s encouraged PPL to purchase assets in other states. The largest of these transactions was PPL's 1998 purchase of 13 plants from Montana Power (leaving NorthWestern Energy – the buyer of the former Montana Power transmission and distribution system ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eutrophic
Eutrophication is the process by which an entire body of water, or parts of it, becomes progressively enriched with minerals and nutrients, particularly nitrogen and phosphorus. It has also been defined as "nutrient-induced increase in phytoplankton productivity". Water bodies with very low nutrient levels are termed oligotrophic and those with moderate nutrient levels are termed mesotrophic. Advanced eutrophication may also be referred to as dystrophic and hypertrophic conditions. Eutrophication can affect freshwater or salt water systems. In freshwater ecosystems it is almost always caused by excess phosphorus. In coastal waters on the other hand, the main contributing nutrient is more likely to be nitrogen, or nitrogen and phosphorus together. This depends on the location and other factors. When occurring naturally, eutrophication is a very slow process in which nutrients, especially phosphorus compounds and organic matter, accumulate in water bodies. These nutrients derive f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydro-electric
Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power). Hydropower supplies one sixth of the world's electricity, almost 4500 TWh in 2020, which is more than all other renewable sources combined and also more than nuclear power. Hydropower can provide large amounts of low-carbon electricity on demand, making it a key element for creating secure and clean electricity supply systems. A hydroelectric power station that has a dam and reservoir is a flexible source, since the amount of electricity produced can be increased or decreased in seconds or minutes in response to varying electricity demand. Once a hydroelectric complex is constructed, it produces no direct waste, and almost always emits considerably less greenhouse gas than fossil fuel-powered energy plants. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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