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Villosa Arkansasensis
''Obovaria arkansasensis'', the Ouachita creekshell, is a species of freshwater mussel, an aquatic bivalve mollusc in the family Unionidae, the river mussels. It is endemic to certain rivers and streams in the Ouachita Mountains, Arkansas, and has a complex life history including its larvae being parasitic on a fish host. Description The Ouachita creekshell grows to about in length. The shell is thin but has robust hinge teeth, especially at the anterior end. There are sometimes a few fine ribs on the posterior end of the shell. The periostracum is olive or yellowish-brown. This species is dimorphic with the males being ovate and the females being less compressed laterally and with the posterior end truncated and sometimes with a notch on the posterior margin. ''Obovaria arkansasensis'' shows great similarity in general appearance to '' Obovaria jacksoniana''. However, its shell morphology and life cycle are different, as are the species of host fish with which it is assoc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isaac Lea
Isaac; grc, Ἰσαάκ, Isaák; ar, إسحٰق/إسحاق, Isḥāq; am, ይስሐቅ is one of the three patriarchs of the Israelites and an important figure in the Abrahamic religions, including Judaism, Christianity, and Islam. He was the son of Abraham and Sarah, the father of Jacob and Esau, and the grandfather of the twelve tribes of Israel. Isaac's name means "he will laugh", reflecting the laughter, in disbelief, of Abraham and Sarah, when told by God that they would have a child., He is the only patriarch whose name was not changed, and the only one who did not move out of Canaan. According to the narrative, he died aged 180, the longest-lived of the three patriarchs. Etymology The anglicized name "Isaac" is a transliteration of the Hebrew name () which literally means "He laughs/will laugh." Ugaritic texts dating from the 13th century BCE refer to the benevolent smile of the Canaanite deity El. Genesis, however, ascribes the laughter to Isaac's parents, Abraha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saline River (Ouachita River)
The Saline River, also known as Saline Creek, is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed June 3, 2011 tributary of the Ouachita River in the south central portion of the U.S. state of Arkansas. It is the longest river that flows entirely within the state of Arkansas. The Saline River begins in the eastern foothills of the Ouachita Mountains in Saline and Garland counties. The river has four headwater tributaries, the South Fork, the Middle Fork, the Alum Fork, and the North Fork, which merge northwest of the city of Benton. The upper section of the Saline is a clear, cold-water stream with a series of fast running shoals interspersed with quiet pools. The central section of the river has clear to murky water with long slower moving pools interrupted by short stretches of fast water. The lower section is sluggish with murky water. The L'Aigle Creek (Saline River of the Ouachita River) connects to the Saline ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molluscs Of The United States
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant taxon, extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. The proportion of undescribed species is very high. Many taxa remain poorly studied. Molluscs are the largest marine biology, marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater mollusc, freshwater and Terrestrial molluscs, terrestrial habitats. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat. The phylum is typically divided into 7 or 8 Taxonomy (biology), taxonomic class (biology), classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurobiology, neurologically advanced of all inve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Animals 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 water is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Obovaria
''Obovaria'' is a genus of freshwater mussels, aquatic bivalve mollusks in the family Unionidae, the river mussels. There are at least six described species in ''Obovaria'' at present, all of which are found in the United States. ''Obovaria subrotunda'' is found in Canada as well. Species * ''Obovaria arkansasensis'' (I. Lea, 1862) * '' Obovaria haddletoni'' (Athearn, 1964) (Haddleton lampmussel), ( Critically Endangered) * '' Obovaria jacksoniana'' (Frierson, 1912) (Southern hickorynut) * ''Obovaria olivaria'' (Rafinesque, 1820) (Hickorynut) * '' Obovaria retusa'' (Lamarck, 1819) (Golf stick pearly mussel or ring pink mussel), ( Critically Endangered) * ''Obovaria subrotunda ''Obovaria subrotunda'', common name the round hickorynut, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. Distribution and conservation status This species is native to eastern No ...'' (Rafinesque, 1820) (Round hickorynut) * '' Obovar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corbicula Fluminea
''Corbicula fluminea'' is a species of freshwater clam native to eastern Asia which has become a successful invasive species throughout North America, South America, and Europe. ''Corbicula fluminea'' is commonly known in the west as the Asian clam or Asiatic clam. In Southeast Asia, ''C. fluminea'' is known as the golden clam, prosperity clam, pygmy clam, or good luck clam. Overview ''Corbicula'' have had global success as an Invasive species, aquatic invasive species, having been introduced to a novel range including South America, North America and Europe. Human industrial activity, such as transport of larvae via ballast water in container ships, has been noted in the literature as a chief invasion vector. A market exists for Asian clams for human consumption in Japan, China, and other countries in the region. According to the United States Geological Survey, ''C. fluminea'' is likely to continue to expand its North American range until it reaches the maximum extent of its l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepomis Cyanellus
The green sunfish (''Lepomis cyanellus'') is a species of freshwater fish in the sunfish family (Centrarchidae) of order Perciformes. A panfish popular with anglers, the green sunfish is also kept as an aquarium fish by hobbyists. They are usually caught by accident, while fishing for other game fish. Green sunfish can be caught with live bait such as nightcrawlers, waxworms, mealworms, and blood worms. Grocery store baits such as pieces of hot dog or corn kernels can even catch fish. Green sunfish are aggressive and will hit small lures. They can be caught with fly fishing tackle. Geographic distribution The green sunfish is native to a wide area of North America, from the Rocky Mountains in the west to the Appalachian Mountains in the east and from the Hudson Bay basin in Canada to the Gulf Coast in the United States and northern Mexico. They are specifically indigenous to a number of lakes and rivers such as the Great Lakes The Great Lakes, also called the Great L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Etheostoma Blennioides
The greenside darter (''Etheostoma blennioides'') is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It inhabits swift riffles in the eastern United States and southern Ontario. Biology Greenside darters typically live for three to five years, grow to a maximum of 5.2 inches (132 mm) standard length and sexually mature at one to two years of age. Greenside darters are reproductively active from February to April in the Midwest and Southeastern United States. Spawning occurs over algae- or moss-covered rocks in deep, swift riffles that are guarded by males that vigorously defended against intruders. Females linger in pools below the riffle and move into a male's territory when ready to spawn. Eggs are viscous and stick together in small clumps on green algae (''Cladophora''), moss (''Fontinalis''), and riverweed (Podostemaceae). ''E. blennioides'' is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Etheostoma Collettei
The Creole darter (''Etheostoma collettei'') is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to the Eastern United States, where it occurs in the Ouachita, Red, Calcasieu and Sabine River drainages in Arkansas and Louisiana. It inhabits gravel riffles, current-swept vegetation and debris in creeks and small to medium rivers. This species can reach a length of . The creole darter was first formally described in 1969 by Ray S. Bridsong and Leslie William Knapp with the type locality given as the Dugdemona River, Jackson Parish, Louisiana''. Etymology The specific name honours of the American American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ambloplites Ariommus
The shadow bass (''Ambloplites ariommus'') is a species of freshwater fish in the sunfish family (Centrarchidae) of order Perciformes. It is endemic to southeastern United States of America. Description The shadow bass, has a lateral line containing 36 to 42 scales. There are 11 spines and 11-12 soft rays in the dorsal fin while the anal fin contains 6-7 spines and 10-11 soft rays. It has a large mouth with the maxilla at the level of the centre of its eye. They are olive to light brown in color and there are frequently 2-4 dark brown vertical bands and blotches along their flanks. The dorsal, anal and caudal fins are usually transparent to light yellow and are mottled with black and gray. The iris is reddish, and the pupil is deep blue. There is a black band which runs from beneath the eye onto the gill cover. The spots on the scales of the shadow bass are triangular while the similar rock bass has rectangular spots on its scales. The shadow bass is a medium sized sunfish which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gill
A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are kept moist. The microscopic structure of a gill presents a large surface area to the external environment. Branchia (pl. branchiae) is the zoologists' name for gills (from Ancient Greek ). With the exception of some aquatic insects, the filaments and lamellae (folds) contain blood or coelomic fluid, from which gases are exchanged through the thin walls. The blood carries oxygen to other parts of the body. Carbon dioxide passes from the blood through the thin gill tissue into the water. Gills or gill-like organs, located in different parts of the body, are found in various groups of aquatic animals, including mollusks, crustaceans, insects, fish, and amphibians. Semiterrestrial marine animals such as crabs and mudskippers have gill cham ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glochidium
The glochidium (plural glochidia) is a microscopic larval stage of some freshwater mussels, aquatic bivalve mollusks in the families Unionidae and Margaritiferidae, the river mussels and European freshwater pearl mussels. These larvae are tiny and are typically between 100 and 200 micrometers, or approximately a third of the size of a grain of salt. They can be round or have hooks, attaching to the gills, fins and scales of fish (for example to the gills of a fish host species) for a period before it detaches and falls to the substrate and takes on the typical form of a juvenile mussel. Since a fish is active and free-swimming, this process helps distribute the mussel species to potential areas of habitat that it could not reach any other way. Before the origin of this larval form was understood, it was described as "parasitic worms" on the fish host, although under normal circumstances, glochidia do not harm fish. Overexposure or heavy infections of glochidia may however g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
