|
Acoustic Tag
Acoustic tags, also known as acoustic transmitters, are small sound-emitting devices that allow the detection and/or remote tracking of organisms in aquatic ecosystems such as lakes, rivers, tributaries, estuaries, or sea. Acoustic tags are commonly used to monitor behavior and movements of fish by sending information to data-logging computers known as ''acoustic receivers''. Acoustic tags allow researchers to obtain locational data of tagged fish through acoustic telemetry. Depending on tag and receiver array configurations, researchers can receive simple presence/absence data, 2D positional data, or even 3D fish tracks in real-time with sub-meter resolutions. Acoustic tags have been used to: * Conduct survival studies and estimate mortalityPeterson, L. K., Jones, M. L., Brenden, T. O., Vandergoot, C. S., & Krueger, C. C. 2021. Evaluating methods for estimating mortality from acoustic telemetry data. Canadian Journal of Fisheries and Aquatic Sciences, 78(10), 1444-1454.Block, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake
A lake is often a naturally occurring, relatively large and fixed body of water on or near the Earth's surface. It is localized in a basin or interconnected basins surrounded by dry land. Lakes lie completely on land and are separate from the ocean, although they may be connected with the ocean by rivers. Lakes, as with other bodies of water, are part of the water cycle, the processes by which water moves around the Earth. Most lakes are fresh water and account for almost all the world's surface freshwater, but some are salt lakes with salinities even higher than that of seawater. Lakes vary significantly in surface area and volume of water. Lakes are typically larger and deeper than ponds, which are also water-filled basins on land, although there are no official definitions or scientific criteria distinguishing the two. Lakes are also distinct from lagoons, which are generally shallow tidal pools dammed by sandbars or other material at coastal regions of ocean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electro-immobilization
Electro-immobilisation is a form of restraint used on livestock as part of animal husbandry. It involves applying an electric current to the animal to interfere with normal nervous activity. The electric current may either be applied via external electrodes, or via an electrode inserted into the anus. The mechanism of immobilisation is by general spastic paralysis resulting from the electric current, and does not have electroanalgesic or anesthesic effects; the animal remains aware while paralysed, and can experience pain. Numerous researchers have found electro-immobilisation to be highly aversive to animals. Electro-immobilisation is banned in several countries and disapproved of by numerous animal welfare organizations. See also * Electrofishing * Electronarcosis Electronarcosis, also called electric stunning or electrostunning, is a profound stupor produced by passing an electric current through the brain. Electronarcosis may be used as a form of electrotherapy in treati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Judas Iscariot
Judas Iscariot (; ; died AD) was, according to Christianity's four canonical gospels, one of the original Twelve Apostles of Jesus Christ. Judas betrayed Jesus to the Sanhedrin in the Garden of Gethsemane, in exchange for thirty pieces of silver, by kiss of Judas, kissing him on the cheek and addressing him as "names and titles of Jesus in the New Testament#Master, master" to reveal his identity in the darkness to the crowd who had come to arrest him. In modern times, his name is often used synonymously with betrayal or treason. The Gospel of Mark gives no motive for Judas's betrayal but does present Jesus predicts his betrayal, Jesus predicting it at the Last Supper, an event also described in all the other gospels. The Gospel of Matthew states that Judas committed the betrayal in exchange for thirty pieces of silver. The Gospel of Luke and the Gospel of John suggest that he was Spirit possession, possessed by Satan. According to , after learning that Jesus Crucifixion of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Invasive Species
An invasive species is an introduced species that harms its new environment. Invasive species adversely affect habitats and bioregions, causing ecological, environmental, and/or economic damage. The term can also be used for native species that become harmful to their native environment after human alterations to its food web. Since the 20th century, invasive species have become serious economic, social, and environmental threats worldwide. Invasion of long-established ecosystems by organisms is a natural phenomenon, but human-facilitated introductions have greatly increased the rate, scale, and geographic range of invasion. For millennia, humans have served as both accidental and deliberate dispersal agents, beginning with their earliest migrations, accelerating in the Age of Discovery, and accelerating again with the spread of international trade. Notable invasive plant species include the kudzu vine, giant hogweed (''Heracleum mantegazzianum''), Japanese knotw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walleye
The walleye (''Sander vitreus'', Synonym (taxonomy), synonym ''Stizostedion vitreum''), also called the walleyed pike, yellow pike, yellow pikeperch or yellow pickerel, is a freshwater perciform fish native to most of Canada and to the Northern United States. It is a North American close relative of the European zander, also known as the pikeperch. The walleye is sometimes called the yellow walleye to distinguish it from the blue walleye, which is a color morph that was once found in the southern Ontario and Quebec regions, but is now presumed extinct. However, recent genetic analysis of a preserved (frozen) 'blue walleye' sample suggests that the blue and yellow walleye were simply phenotypes within the same species and do not merit separate taxonomic classification. In parts of its range in English-speaking Canada, the walleye is known as a pickerel, though the fish is not related to the true Esox, pickerels, which are members of the family ''Esocidae''. It is also sometimes c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Trout
The lake trout (''Salvelinus namaycush'') is a freshwater Salvelinus, char living mainly in lakes in Northern North America. Other names for it include mackinaw, namaycush, lake char (or charr), touladi, togue, laker, and grey trout. In Lake Superior, it can also be variously known as siscowet, paperbelly and lean. The lake trout is prized both as a game fish and as a Fish as food, food fish. Those caught with dark coloration may be called ''mud hens''. Taxonomy and etymology It is the only member of the subgenus ''Cristovomer'', which is more derived than the subgenus ''Salvelinus#Taxonomy, Baione'' (the most Basal (phylogenetics), basal clade of ''Salvelinus'', containing the brook trout (''S. fontinalis'') and silver trout (''S. agasizii'')) but still basal to the other members of ''Salvelinus''. The binominal nomenclature, specific epithet ''namaycush'' derives from ''namekush'', a form of the word used in some inland Southern East Cree language, Southern East Cree commun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laurentian Great Lakes
The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Superior, Michigan, Huron, Erie, and Ontario (though hydrologically, Michigan and Huron are a single body of water, joined at the Straits of Mackinac). The Great Lakes Waterway enables modern travel and shipping by water among the lakes. The lakes connect to the Atlantic Ocean via the Saint Lawrence River, and to the Mississippi River basin through the Illinois Waterway. The Great Lakes are the largest group of freshwater lakes on Earth by total area and the second-largest by total volume. They contain 21% of the world's surface fresh water by volume. The total surface is , and the total volume (measured at the low water datum) is , slightly less than the volume of Lake Baikal (, 22–23% of the world's surface fresh water). Because of their sea-like characteristics, such as rolling waves, sustained ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smolts
Fish go through various life stages between fertilization and adulthood. The life of fish start as spawned eggs which hatch into immotile larvae. These larval hatchlings are not yet capable of feeding themselves and carry a yolk sac which provides stored nutrition. Before the yolk sac completely disappears, the young fish must mature enough to be able to forage independently. When they have developed to the point where they are capable of feeding by themselves, the fish are called fry. When, in addition, they have developed scales and working fins, the transition to a juvenile fish is complete and it is called a fingerling, so called as they are typically about the size of human fingers. The juvenile stage lasts until the fish is fully grown, sexually mature and interacting with other adult fish. Growth stages Ichthyoplankton ''(planktonic or drifting fish)'' are the eggs and larvae of fish. They are usually found in the sunlit zone of the water column, less than 200 me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salmon
Salmon (; : salmon) are any of several list of commercially important fish species, commercially important species of euryhaline ray-finned fish from the genera ''Salmo'' and ''Oncorhynchus'' of the family (biology), family Salmonidae, native to tributary, tributaries of the North Atlantic (''Salmo'') and North Pacific (''Oncorhynchus'') basins. ''Salmon'' is a colloquial or common name used for fish in this group, but is not a scientific name. Other closely related fish in the same family include trout, Salvelinus, char, Thymallus, grayling, Freshwater whitefish, whitefish, lenok and Hucho, taimen, all coldwater fish of the subarctic and cooler temperate regions with some sporadic endorheic populations in Central Asia. Salmon are typically fish migration, anadromous: they hatch in the shallow gravel stream bed, beds of freshwater headstreams and spend their juvenile fish, juvenile years in rivers, lakes and freshwater wetlands, migrate to the ocean as adults and live like sea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydropower
Hydropower (from Ancient Greek -, "water"), also known as water power or water energy, is the use of falling or fast-running water to Electricity generation, produce electricity or to power machines. This is achieved by energy transformation, converting the Potential energy, gravitational potential or kinetic energy of a water source to produce power. Hydropower is a method of sustainable energy production. Hydropower is now used principally for Hydroelectricity, hydroelectric power generation, and is also applied as one half of an energy storage system known as pumped-storage hydroelectricity. Hydropower is an attractive alternative to fossil fuels as it does not directly produce Carbon dioxide in Earth's atmosphere, carbon dioxide or other Air pollution, atmospheric pollutants and it provides a relatively consistent source of power. Nonetheless, it has economic, sociological, and environmental downsides and requires a sufficiently energetic source of water, such as a river or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data
Data ( , ) are a collection of discrete or continuous values that convey information, describing the quantity, quality, fact, statistics, other basic units of meaning, or simply sequences of symbols that may be further interpreted formally. A datum is an individual value in a collection of data. Data are usually organized into structures such as tables that provide additional context and meaning, and may themselves be used as data in larger structures. Data may be used as variables in a computational process. Data may represent abstract ideas or concrete measurements. Data are commonly used in scientific research, economics, and virtually every other form of human organizational activity. Examples of data sets include price indices (such as the consumer price index), unemployment rates, literacy rates, and census data. In this context, data represent the raw facts and figures from which useful information can be extracted. Data are collected using technique ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AT Screen
AT or at may refer to: Geography Austria * Austria (ISO 2-letter country code) * .at, Internet country code top-level domain United States * Atchison County, Kansas (county code) * The Appalachian Trail (A.T.), a 2,180+ mile long mountainous trail in the Eastern United States Elsewhere * Antigua and Barbuda, World Meteorological Organization country code * Ashmore and Cartier Islands (FIPS 10-4 territory code, and obsolete NATO country code) * At, Bihar, village in Aurangabad district of Bihar, India * Province of Asti, Italy (ISO 3166-2:IT code) * Australia, LOC MARC code Politics * Awami Tahreek a left-wing Pakistani political party Science and technology Computing * @ (or "at sign"), the punctuation symbol now typically used in e-mail addresses and tweets) * at (command), used to schedule tasks or other commands to be performed or run at a certain time * IBM Personal Computer/AT ** AT (form factor) for motherboards and computer cases ** AT connector, a five-pin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
