|
Vernon Lake
Vernon Lake is a man-made lake in Vernon Parish, Louisiana. In 1963, Vernon Lake was created by the impounding of Anacoco Creek (Anacoco Bayou), creating a lake for the purpose of water supply and recreation. The lake is west of Leesville, and north of Anacoco Lake. History The Louisiana Legislature passed La. Act 277 of 1948 creating the Anacoco-Prairie State Game and Fish Preserve, setting aside of land, money for the purchase of wild game and fish, and for restocking purposes, as well as for the building and maintenance of a dam. A second dam was authorized but no money provided. Construction was completed in 1951. Lake authority Act 858 of the 1981 Legislature abolished the Anacoco Prairie Game and Fish Commission and transferred authority to the Louisiana Department of Wildlife and Fisheries. The law provided for a panel of citizens to be appointed to an advisory board. The Vernon Parish Police Jury established the Vernon Parish Game and Fish Commission composed of nin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vernon, Louisiana
Vernon Parish (French: ''Paroisse de Vernon'') is a parish located in the U.S. state of Louisiana. As of the 2020 census, the population was 48,750. The parish seat and most populous municipality is Leesville. Bordered on the west by the Sabine River, the parish was founded in 1871 during the Reconstruction era. It was long a center of the timber industry, which harvested pine in the hills and bottomland hardwoods. Construction of a railway to the area in 1897 stimulated the marketing of lumber and businesses in the area. Since World War II, Fort Johnson, formerly Fort Polk, has been most important to the parish economy. The population of the Leesville area rapidly increased fivefold after the fort was opened. Vernon Parish is part of the Fort Johnson South, LA Micropolitan Statistical Area, which is also included in the DeRidder-Fort Johnson South, LA Combined Statistical Area. History The area comprising Vernon was a part of a tract of land whose control was disputed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mercury (element)
Mercury is a chemical element; it has Symbol (chemistry), symbol Hg and atomic number 80. It is commonly known as quicksilver. A Heavy metal element, heavy, silvery d-block element, mercury is the only metallic element that is known to be liquid at standard temperature and pressure; the only other element that is liquid under these conditions is the halogen bromine, though metals such as caesium, gallium, and rubidium melt just above room temperature. Mercury occurs in deposits throughout the world mostly as cinnabar (mercuric sulfide). The red pigment vermilion is obtained by Mill (grinding), grinding natural cinnabar or synthetic mercuric sulfide. Exposure to mercury and mercury-containing organic compounds is toxic to the nervous system, immune system and kidneys of humans and other animals; mercury poisoning can result from exposure to water-soluble forms of mercury (such as mercuric chloride or methylmercury) either directly or through mechanisms of biomagnification. Mercu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ramsar Sites In The United States
Ramsar may refer to: * Places so named: ** Ramsar, Mazandaran, city in Iran ** Ramsar, Rajasthan, village in India * Eponyms of the Iranian city: ** Ramsar Convention, concerning wetlands, signed in Ramsar, Iran ** Ramsar site, wetland listed in accord with the Ramsar Convention * Others ** Ramsar Palace The Ramsar Palace or Marmar Palace is a historic royal residence in Iran. The palace is in Ramsar, Mazandaran, Ramsar, a city on the coast of the Caspian Sea. History The Ramsar Palace was established on a land of 60,000 square meters in 1937. T ..., a palace in Ramsar, Mazandaran See also * :Ramsar sites {{Disambig, geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reservoirs In Louisiana
A reservoir (; ) is an enlarged lake behind a dam, usually built to store fresh water, often doubling for hydroelectric power generation. Reservoirs are created by controlling a watercourse that drains an existing body of water, interrupting a watercourse to form an embayment within it, excavating, or building any number of retaining walls or levees to enclose any area to store water. Types Dammed valleys Dammed reservoirs are artificial lakes created and controlled by a dam constructed across a valley and rely on the natural topography to provide most of the basin of the reservoir. These reservoirs can either be ''on-stream reservoirs'', which are located on the original streambed of the downstream river and are filled by stream, creeks, rivers or rainwater that surface runoff, runs off the surrounding forested catchments, or ''off-stream reservoirs'', which receive water diversion, diverted water from a nearby stream or aqueduct (water supply), aqueduct or pipeline ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bream
Bream (, ) are species of freshwater fish belonging to a variety of genera including '' Abramis'' (e.g., ''A. brama'', the common bream), '' Ballerus'', '' Blicca'', '' Brama'', '' Chilotilapia'', '' Etelis'', '' Lepomis'', '' Gymnocranius'', '' Lethrinus'', '' Nemipterus'', '' Pharyngochromis'', '' Rhabdosargus'', '' Scolopsis'', or '' Serranochromis''. Although species from all of these genera are called "bream", the term does not imply a degree of relatedness between them. Fish termed "bream" tend to be narrow, deep-bodied species. The name is a derivation of the Middle English word ''breme'', of Old French origin. Marine species The term sea bream is sometimes used for fish of the family (biology)">family Sparidae including ''Acanthopagrus'' (Australia), ''Argyrops spinifer, Argyrops'', gilt-head bream ''Sparus aurata'' (''orata'' in Italy, ''dorada'' in Spain), black seabream ''Spondyliosoma cantharus'' and red seabream '' Pagrus'' or '' Pagellus'' species; or pomfre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bluegill
The bluegill (''Lepomis macrochirus''), sometimes referred to as "bream", "brim", "sunny", or, in Texas, "copper nose", is a species of North American freshwater fish, native to and commonly found in streams, rivers, lakes, ponds and wetlands east of the Rocky Mountains. It is the type species of the genus ''Lepomis'' (true sunfish), from the family (biology), family Centrarchidae (sunfishes, crappies and black basses) in the order (biology), order Centrarchiformes. Bluegills can grow up to long and about . While their color can vary from population to population, they typically have a very distinctive coloring, with deep blue and purple on the face and gill cover, dark olive-colored bands down the side, and a fiery orange to yellow belly. They are omnivorous and will consume anything they can fit in their mouth, but mostly feed on small aquatic insects and baitfishes. The fish are important prey for bass (fish), bass, other larger Centrarchidae, sunfish, northern pike and musk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Redear Sunfish
The redear sunfish (''Lepomis microlophus''), also known as the shellcracker, Georgia bream, cherry gill, chinquapin, improved bream, and sun perch, is a freshwater fish in the family Centrarchidae and is native to the southeastern United States. Due to its popularity as a sport fish, it has been widely introduced across North America. Description Redear sunfish generally resemble bluegill except for coloration and somewhat larger maximum size. The redear sunfish also has faint vertical bars traveling downwards from its dorsal. It is dark-colored dorsally and yellow-green ventrally. Unlike bluegill, the male has a cherry-red edge on its operculum; females have orange coloration in this area. The adult fish are between in length. Max length is , compared to a maximum of about for the bluegill. Redear sunfish on average reach about , also larger than the average bluegill. Habitat and range Redear sunfish are native to the southeastern United States. They range from North ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flathead Catfish
The flathead catfish (''Pylodictis olivaris''), also called by several common names including mudcat or shovelhead cat, is a large species of North American freshwater catfish in the family Ictaluridae. It is the only species of the genus ''Pylodictis''. Ranging from the lower Great Lakes region to northern Mexico, it has been widely introduced and is an invasive species in some areas. The closest living relative of the flathead catfish is the much smaller widemouth blindcat, ''Satan eurystomus'', a cavefish. Evolution Fossil remains of the flathead catfish become abundant in geological formations of the central United States from the Middle Miocene onwards. This suggests that it has existed as a distinct species for nearly 20 million years. Common names The flathead catfish is also known as the yellow cat, mud cat, Johnnie cat, ''goujon'', ''appaluchion'', ''opelousas'', pied cat and Mississippi cat. In the dialect of the Ozark mountains it may be referred to as a "gran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bio-accumulation
Bioaccumulation is the gradual accumulation of substances, such as pesticides or other chemicals, in an organism. Bioaccumulation occurs when an organism absorbs a substance faster than it can be lost or eliminated by catabolism and excretion. Thus, the longer the biological half-life of a Toxin, toxic substance, the greater the risk of chronic poisoning, even if Measured environmental concentration, environmental levels of the toxin are not very high. Bioaccumulation, for example in fish, can be predicted by models. Hypothesis for molecular size cutoff criteria for use as bioaccumulation potential indicators are not supported by data. Biotransformation can strongly modify bioaccumulation of chemicals in an organism. Toxicity induced by metals is associated with bioaccumulation and biomagnification. Storage or uptake of a metal faster than it is metabolized and excreted leads to the accumulation of that metal. The presence of various chemicals and harmful substances in the environ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mercury Poisoning
Mercury poisoning is a type of metal poisoning due to exposure to mercury. Symptoms depend upon the type, dose, method, and duration of exposure. They may include muscle weakness, poor coordination, numbness in the hands and feet, skin rashes, anxiety, memory problems, trouble speaking, trouble hearing, or trouble seeing. High-level exposure to methylmercury is known as Minamata disease. Methylmercury exposure in children may result in acrodynia (pink disease) in which the skin becomes pink and peels. Long-term complications may include kidney problems and decreased intelligence. The effects of long-term low-dose exposure to methylmercury are unclear. Forms of mercury exposure include metal, vapor, salt, and organic compound. Most exposure is from eating fish, amalgam-based dental fillings, or exposure at a workplace. In fish, those higher up in the food chain generally have higher levels of mercury, a process known as biomagnification. Less commonly, poisoning may occu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methylmercury
Methylmercury is an organometallic cation with the formula . It is the simplest organomercury compound. Methylmercury is extremely toxic, and its derivatives are the major source of organic mercury for humans. It is a bioaccumulative environmental toxicant with a 50-day half-life. Methylmercury (derived biologically from dimethylmercury) is the causative agent of the infamous Minamata disease. Methylmercury is designated as a "priority hazardous substance" according to the Directive on Environmental Quality Standards (Directive 2013/39/EU). Structure and chemistry "Methylmercury" is a shorthand for the hypothetical "methylmercury cation", sometimes written ''methylmercury(1+) cation'' or ''methylmercury(II) cation''. This functional group is composed of a methyl group Chemical bond, bonded to an atom of Mercury (element), mercury. Its chemical formula is (sometimes written as ). The Methylmercury compound has an overall charge of +1, with Hg in the +2 oxidation state. Methylmer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
