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Ambloplites Cavifrons
The Roanoke bass (''Ambloplites cavifrons'') is a species of freshwater fish in the sunfish family (Centrarchidae) of order Centrarchiformes. This species is endemic to rivers in the eastern United States of America, where it is native only to the states of Virginia and North Carolina. Description Roanoke bass have a robust, compressed body with a large, terminal mouth and a nearly scaleless cheek. The anal fin has a dark margin, the pectoral fin is rounded and the caudal fin is emarginate. The eye is large and red contrasting with the dark brown or olive colour of the body. The Roanoke bass closely resembles the rock bass (''Ambloplites rupestris'') and the two are easily and often confused notwithstanding different colouring. The Roanoke bass is dark, olive green to olive brown on the back, fading to grayish on the flanks and white on the underside. The spots on its scales are smaller than those of rock bass and they have paler small whitish or yellowish spots on the upper bod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edward Drinker Cope
Edward Drinker Cope (July 28, 1840 – April 12, 1897) was an American zoologist, paleontology, paleontologist, comparative anatomy, comparative anatomist, herpetology, herpetologist, and ichthyology, ichthyologist. Born to a wealthy Quaker family, he distinguished himself as a child prodigy interested in science, publishing his first scientific paper at the age of 19. Though his father tried to raise Cope as a gentleman farmer, he eventually acquiesced to his son's scientific aspirations. Cope had little formal scientific training, and he eschewed a teaching position for field work. He made regular trips to the Western United States, American West, prospecting in the 1870s and 1880s, often as a member of United States Geological Survey, U.S. Geological Survey teams. A personal feud between Cope and paleontologist Othniel Charles Marsh led to a period of intense fossil-finding competition now known as the Bone Wars. Cope's financial fortunes soured after failed mining ventures i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roanoke River
The Roanoke River ( ) runs long through southern Virginia and northeastern North Carolina in the United States. A major river of the southeastern United States, it drains a largely rural area of the coastal plain from the eastern edge of the Appalachian Mountains southeast across the Piedmont to Albemarle Sound. An important river throughout the history of the United States, it was the site of early settlement in the Virginia Colony and the Carolina Colony. An section of its lower course in Virginia between the Leesville Lake and Kerr Lake is known as the Staunton River, pronounced , as is the Shenandoah Valley city of that name. It is impounded along much of its middle course to form a chain of reservoirs. Staunton River is also the name of the northern political district of Pittsylvania County, Virginia, where a large section of the river serves as the boundary between Campbell County, Virginia (to the north) and Pittsylvania County (to the south). The Roanoke Riv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Gizzard Shad
The American gizzard shad (''Dorosoma cepedianum''), also known as the mud shad, is a member of the Clupeidae, herring family of fish and is native to large swaths of fresh and brackish waters in the United States of America, as well as portions of Quebec, Canada, and Mexico. The adult has a deep body, with a silvery-green coloration above fading to plain silver below. The gizzard shad commonly resides in freshwater lakes, reservoirs, rivers, and streams but can also reside in brackish waters, as it does on the Atlantic coast of the United States. Their range is across most of the continental United States, although they typically go no further north than New York and no further west than New Mexico. They are a large part of many of the ecosystems they inhabit and can drive changes in Phytoplankton, phyto- and zooplankton, thereby indirectly affecting other planktivorous fishes. The gizzard shad has been widely used as a food source for game fish, with varied success in managemen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golden Shiner
The golden shiner (''Notemigonus crysoleucas'') is a species of freshwater ray-finned fish belonging to the family Leuciscidae. This fish occurs in Eastern North America. It is the sole member of its genus. Commonly used as a bait fish, it is probably the most widely pond-cultured fish in the United States. It can be found in Quebec, and its French name is "Mené jaune" or "Chatte de l'Est". Taxonomy It is the only North American member of the subfamily Leuciscinae, within which it occupies a relatively basal position, though still rather derived. All other members of this subfamily are found in Eurasia. Fossil remains of ''Notemigonus'' sp. have been recovered from the Late Miocene-aged Montbrook fossil site of Florida, US. Description Though it has been known to reach lengths of , in the wild the golden shiner is usually between long. The body is laterally compressed (deep-bodied). The back is dark green or olive, and the belly is a silvery white. The sides are silver ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fathead Minnow
Fathead minnow (''Pimephales promelas''), also known as fathead or tuffy, is a species of freshwater Actinopterygii, ray-finned fish belonging to the Family (biology), family Leuciscidae, the shiners, daces and minnows. The natural geographic range extends throughout much of North America, from central Canada south along the Rocky Mountains, Rockies to Texas, and east to Virginia and the Northeastern United States.Page, Lawrence M. and Brooks M. Burr (1991), ''Freshwater Fishes'', p. 129–130, Houghton Mifflin, New York, NY. This minnow has also been introduced to many other areas via bait bucket releases. Its golden, or Xanthochromism, xanthic, strain, known as the rosy-red minnow, is a very common feeder fish sold in the United States and Canada. This fish is also known for producing Schreckstoff (a distress signal). Physical description The fathead minnow in its wild form is generally dull olive-grey in appearance, with a dusky stripe extending along the back and side, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crayfish
Crayfish are freshwater crustaceans belonging to the infraorder Astacidea, which also contains lobsters. Taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea. They breathe through feather-like gills. Some species are found in brooks and streams, where fresh water is running, while others thrive in swamps, ditches, and paddy fields. Most crayfish cannot tolerate polluted water, although some species, such as '' Procambarus clarkii'', are hardier. Crayfish feed on animals and plants, either living or decomposing, and detritus. The term "crayfish" is applied to saltwater species in some countries. Terminology The name "crayfish" comes from the Old French word ' ( Modern French '). The word has been modified to "crayfish" by association with "fish" ( French language">Modern French '). The word has been modified to "crayfish" by association with "fish" ( American variant "crawfish" is similarly derived. Some kinds of crayfish are known lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leech
Leeches are segmented parasitism, parasitic or Predation, predatory worms that comprise the Class (biology), subclass Hirudinea within the phylum Annelida. They are closely related to the Oligochaeta, oligochaetes, which include the earthworm, and like them have soft, muscular segmented bodies that can lengthen and contract. Both groups are hermaphrodites and have a clitellum, but leeches typically differ from the oligochaetes in having suckers at both ends and ring markings that do not correspond with their internal segmentation. The body is muscular and relatively solid; the coelom, the spacious body cavity found in other annelids, is reduced to small channels. The majority of leeches live in freshwater habitats, while some species can be found in terrestrial or marine environments. The best-known species, such as the medicinal leech, ''Hirudo medicinalis'', are hematophagous, attaching themselves to a host with a sucker and feeding on blood, having first secreted the pepti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insects
Insects (from Latin ') are hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of jointed legs, compound eyes, and a pair of antennae. Insects are the most diverse group of animals, with more than a million described species; they represent more than half of all animal species. The insect nervous system consists of a brain and a ventral nerve cord. Most insects reproduce by laying eggs. Insects breathe air through a system of paired openings along their sides, connected to small tubes that take air directly to the tissues. The blood therefore does not carry oxygen; it is only partly contained in vessels, and some circulates in an open hemocoel. Insect vision is mainly through their compound eyes, with additional small ocelli. Many insects can hear, using tympanal organs, which may be on the legs or other parts of the b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackwater River (Virginia)
The Blackwater River of southeastern Virginia flows from its source near the city of Petersburg, Virginia for about through the Inner Coastal Plain region of Virginia (part of the Atlantic Coastal Plain). The Blackwater joins the Nottoway River to form the Chowan River, which empties into Albemarle Sound. The Blackwater and Nottoway river confluence is located at the border between Virginia and North Carolina. Overview The Blackwater River is a true blackwater river. Its water is clear, dark, slightly acidic, and tannin stained. Its drainage basin contains many swamps. The river's flood plain is mostly forested and swampy, including bald cypress and tupelo swamp forests. The upper Blackwater River is called Blackwater Swamp. In this region of Virginia, many streams are called "swamps" but still function like streams in being long and linear, with water moving from one end to the other and laid out in a normal stream tributary network. In contrast, some of the region's wetl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nottoway River
The Nottoway River is a river in the U.S. State of Virginia and northeastern North Carolina that is in length. The river begins in Prince Edward County and merges with the Blackwater River to form the Chowan River in North Carolina. The river is part of the Chowan River system, which empties into the Albemarle Sound in North Carolina. Course The Nottoway River rises in a dense forest outside of Scholfield, an unincorporated community in Prince Edward County. The Nottoway serves as the boundary of Prince Edward and Lunenburg counties, then Nottoway and Lunenburg counties. The river serves as the boundaries for other counties such as Brunswick, Dinwiddie, Sussex, where it makes a northeastern jump, and Greensville County. The river courses southeast into Southampton County. The Nottoway River reaches North Carolina south of Franklin, Virginia. The river briefly enters North Carolina for ending at the confluence of the Blackwater & Nottoway rivers, creating the Chowa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Introduced Species
An introduced species, alien species, exotic species, adventive species, immigrant species, foreign species, non-indigenous species, or non-native species is a species living outside its native distributional range, but which has arrived there by human activity, directly or indirectly, and either deliberately or accidentally. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are considered naturalized. The process of human-caused introduction is distinguished from biological colonization, in which species spread to new areas through "natural" (non-human) means such as storms and rafting. The Latin expression neobiota captures the characteristic that these species are ''new'' biota to their environment in terms of established biological network (e.g. food web) relationships. Neobiota can further be divided into neozoa (also: neozoons, sing. neozoon, i.e. animals) and ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Local Extinction
Local extinction, also extirpation, is the termination of a species (or other taxon) in a chosen geographic area of study, though it still exists elsewhere. Local extinctions are contrasted with extinction, global extinctions. Local extinctions mark a change in the ecology of an area. It has sometimes been followed by a replacement of the species taken from other locations, such as with wolf reintroduction. Discussion Glacial period, Glaciation is one factor that leads to local extinction. This was the case during the Quaternary glaciation, Pleistocene glaciation event in North America. During this period, most of the native North American species of earthworm were killed in places covered by glaciation. This left them open for colonization by European earthworms brought over in soil from Europe. Species naturally become extinct from islands over time; this can be either local extinction if the species also occurs elsewhere, or in cases of endemism, island endemism, outright ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
