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Leptodiaptomus Sicilis
''Leptodiaptomus sicilis'' is a calanoid copepod native to the Laurentian Great Lakes and its basin. Distribution The species is found all over North America, north of Missouri, in fresh and saline waters. It is found in all the Great Lakes but is most abundant in Lake Superior. Morphology ''Leptodiaptomus sicilis'' adult females are distinguished by their three-segmented urosome; pointed, triangular metasomal wings with minute sensilla; and the genital segment without obvious lateral projections. In the mature male, the right exopod lateral spine of leg 5 is located in the middle of the segment, is quite long, and projects almost perpendicularly to the segment. In addition, the projections on the left exopod terminal segment are short, blunt, and well-separated. The right antennule on the male has a long, slender process coming off the terminal end of the third segment from the distal end and the metasomal wings are expanded and triangular in shape. These species are physic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stephen Alfred Forbes
Stephen Alfred Forbes (May 29, 1844 – March 13, 1930) was the first chief of the Illinois Natural History Survey, a founder of aquatic ecosystem science and a dominant figure in the rise of American ecology. His publications are striking for their merger of extensive field observations with conceptual insights. Forbes believed that ecological knowledge was fundamental for human well being. Forbes was important to the development of ecological theory. He was acknowledged by the National Academy of Sciences as "the founder of the science of ecology in the United States". While already famous as an economic entomologist, Forbes undertook studies of massive fish mortality in Lake Mendota, Wisconsin. He showed the connection of algae blooms and lake physics to fish kills, and embarked on a remarkable research program into lake ecology and river ecology. Many of his insights about lake ecology were collected in an influential paper, "The Lake as a Microcosm". Notable for both conc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calanoid
Calanoida is an order of copepods, a group of arthropods commonly found as zooplankton. The order includes around 46 families with about 1800 species of both marine and freshwater copepods between them. Description Calanoids can be distinguished from other planktonic copepods by having first antennae at least half the length of the body and biramous second antennae. However, their most distinctive anatomical trait is the presence of a joint between the fifth and sixth body segments. The largest specimens reach long, but most do not exceed long. Classification Calanoida contains the following families, as well as the genus '' Microdisseta'' (which is currently ''incertae sedis''); * Acartiidae * Aetideidae * Arctokonstantinidae * Arietellidae * Augaptilidae * Bathypontiidae * Calanidae * Calocalanidae * Candaciidae * Centropagidae * Clausocalanidae * Diaixidae * Diaptomidae * Discoidae * Epacteriscidae * Eucalanidae * Euchaetidae * Fosshageniidae * Heterorhabdidae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copepod
Copepods (; meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat (ecology), habitat. Some species are planktonic (inhabiting sea waters), some are benthos, benthic (living on the ocean floor), a number of species have parasitic phases, and some continental species may live in limnoterrestrial habitats and other wet terrestrial places, such as swamps, under leaf fall in wet forests, bogs, springs, ephemeral ponds, and puddles, damp moss, or water-filled recesses (phytotelmata) of plants such as bromeliads and pitcher plants. Many live underground in marine and freshwater caves, sinkholes, or stream beds. Copepods are sometimes used as Ecological indicator, biodiversity indicators. As with other crustaceans, copepods have a larval form. For copepods, the egg hatches into a Crustacean larvae#Nauplius, nauplius form, with a head and a tail but no true thorax or abdomen. The larva molts several times until it resembles the adult an ... [...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 in the mid-east region of North America that connect to the Atlantic Ocean via the Saint Lawrence River. There are five lakes, which are Superior, Michigan, Huron, Erie, and Ontario and are in general on or near the Canada–United States border. Hydrologically, lakes Michigan and Huron are a single body joined at the Straits of Mackinac. The Great Lakes Waterway enables modern travel and shipping by water among the lakes. The Great Lakes are the largest group of freshwater lakes on Earth by total area and are second-largest by total volume, containing 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 winds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptodiaptomus Ashlandi
''Leptodiaptomus ashlandi'' is a calanoid copepod zooplankton native to the Laurentian Great Lakes and their basin. Distribution ''Leptodiaptomus ashlandi'' is a zooplankton species widely distributed across Canada and the northern half of the United States in large deep lakes. It occurs in all the Great Lakes. Morphology Adult females of ''L. ashlandi'' can be distinguished by their two-segmented urosome and asymmetrical, rounded metasomal wings. Males are characterized by a large lateral spine on leg 5, located in the proximal third of the terminal segment, and by the presence of a slender process on the third segment from the distal end of the right antennule. This species is morphologically similar to other leptodiaptomids ('' Leptodiaptomus minutus'', '' L. sicilis'') and skistodiaptomids ('' Skistodiaptomus oregonensis''). Ecology ''Leptodiaptomus ashlandi'' are known prey items for a number of native and non-native Great Lakes fishes. They are also prey items for other ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptodiaptomus Minutus
''Leptodiaptomus ashlandi'' is a calanoid copepod Copepods (; meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat (ecology), habitat. Some species are planktonic (inhabiting sea waters), some are benthos, benthic (living on the ocean floor) ... zooplankton. Distribution ''Leptodiaptomus minutus'' is found over most of North America north of the 40th parallel and in Greenland and Iceland. It may extend further south in mountainous areas of the East, but appears to be absent from the far western United States. It is found in all the Great Lakes and is particularly abundant in Lake Huron and Lake Michigan Morphology ''Leptodiaptomus minutus'' adult females are characterized by a two-segmented urosome, metasomal wings that are nearly symmetrical and rounded, and endopods of leg 5 are greatly reduced in size. In adult males, the small lateral spine on the terminal segment of leg 5 is located in the proximal third of the se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skistodiaptomus Oregonensis
''Skistodiaptomus'' is a genus of freshwater copepods in the family Diaptomidae, found across North America. The genus contains eight species, three of which are endemic to the United States and are listed on the IUCN Red List as vulnerable species (VU) or Data Deficient A data deficient (DD) species is one which has been categorized by the International Union for Conservation of Nature (IUCN) as offering insufficient information for a proper assessment of conservation status to be made. This does not necessaril ... (DD). *'' Skistodiaptomus bogalusensis'' (M. S. Wilson & Moore, 1953) *'' Skistodiaptomus carolinensis'' Yeatman, 1986 *'' Skistodiaptomus mississippiensis'' (Marsh, 1894) *'' Skistodiaptomus oregonensis'' (Lilljeborg, 1889) *'' Skistodiaptomus pallidus'' (Herrick, 1879) *'' Skistodiaptomus pygmaeus'' (Pearse, 1906) *'' Skistodiaptomus reighardi'' (Marsh, 1895) *'' Skistodiaptomus sinuatus'' (Kincaid, 1953) References Diaptomidae Freshwater crustaceans of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diaptomidae
Diaptomidae is a family of freshwater pelagic copepods. It includes around 50 genera: *''Acanthodiaptomus'' Kiefer, 1932 *''Aglaodiaptomus'' Light, 1938 *''Allodiaptomus'' Kiefer, 1936 *''Arctodiaptomus'' Kiefer, 1932 *''Argyrodiaptomus'' Brehm, 1933 *'' Aspinus'' Brandorff, 1973 *'' Austrinodiaptomus'' Reid, 1997 *''Calchas'' Brehm, 1949 *'' Calodiaptomus'' Kiefer, 1936 *'' Camerundiaptomus'' Dumont & Chiambeng, 2002 *'' Colombodiaptomus'' Gaviria, 1989 *'' Copidodiaptomus'' Kiefer, 1968 *'' Dactylodiaptomus'' Kiefer, 1936 *'' Dasydiaptomus'' Defaye & Dussart, 1993 *'' Dentodiaptomus'' Shen & Tai, 1964 *''Diaptomus'' Westwood, 1836 *'' Dolodiaptomus'' Shen & Tai, 1964 *''Dussartius'' Kiefer, 1978 *''Eodiaptomus'' Kiefer, 1932 *''Eudiaptomus'' Kiefer, 1932 *'' Filipinodiaptomus'' Mamaril & Fernando, 1978 *'' Gigantodiaptomus'' Kiefer, 1932 *'' Hadodiaptomus'' Brancelj, 2005 *''Heliodiaptomus'' Kiefer, 1932 *''Hemidiaptomus'' G. O. Sars, 1903 *''Hesperodiaptomus ''Hesperodiaptom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Crustaceans Of North America
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include non- salty mineral-rich waters such as chalybeate springs. Fresh water may encompass frozen and meltwater in ice sheets, ice caps, glaciers, snowfields and icebergs, natural precipitations such as rainfall, snowfall, hail/ sleet and graupel, and surface runoffs that form inland bodies of water such as wetlands, ponds, lakes, rivers, streams, as well as groundwater contained in aquifers, subterranean rivers and lakes. Fresh water is the water resource that is of the most and immediate use to humans. Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of higher plants and most insects, amphibians, reptiles, mammals and birds need fresh water to survive. Fresh wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustaceans Described In 1882
Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans (Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
