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Carnivorous Algae
Predatory dinoflagellates are predatory heterotrophic or mixotrophic alveolates that derive some or most of their nutrients from digesting other organisms. About one half of dinoflagellates lack photosynthetic pigments and specialize in consuming other eukaryotic cells, and even photosynthetic forms are often predatory. Organisms that derive their nutrition in this manner include '' Oxyrrhis marina'', which feeds phagocytically on phytoplankton, '' Polykrikos kofoidii'', which feeds on several species of red-tide and/or toxic dinoflagellates, '' Ceratium furca'', which is primarily photosynthetic but also capable of ingesting other protists such as ciliates, '' Cochlodinium polykrikoides'', which feeds on phytoplankton, ''Gambierdiscus toxicus'', which feeds on algae and produces a toxin that causes ciguatera fish poisoning when ingested, and ''Pfiesteria'' and related species such as '' Luciella masanensis'', which feed on diverse prey including fish skin and human blood cells. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tilapia Pfiesteriosis
Tilapia ( ) is the common name#Biological common names, common name for nearly a hundred species of cichlid fish from the Coelotilapia joka, coelotilapine, coptodonine, Heterotilapia, heterotilapine, Oreochromini, oreochromine, Pelmatolapia, pelmatolapiine, and Tilapiine cichlid, tilapiine tribe (biology), tribes (formerly all were "Tilapiini"), with the economically most important species placed in the Coptodonini and Oreochromini. Tilapia are mainly freshwater fish inhabiting shallow streams, ponds, rivers, and lakes, and less commonly found living in brackish water. Historically, they have been of major importance in artisanal fishing in Africa, and they are of increasing aquaculture of tilapia, importance in aquaculture and aquaponics. Tilapia can become a problematic invasive species in new warm-water habitats such as Australia, whether deliberately or accidentally introduced species, introduced, but generally not in temperate climates due to their inability to survive in col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pfiesteria Shumwayae
''Pseudopfiesteria shumwayae'' (formerly placed in the genus ''Pfiesteria''; see 'Taxonomy' section below) is a species of heterotrophic dinoflagellates in the genus '' Pseudopfiesteria.'' It was first characterized in North Carolina in 2000. It can acquire the ability for photosynthesis through eating green algae and retaining their chloroplasts. It can also turn predatory and toxic. Strains of ''Pseudopfiesteria shumwayae'' have been implicated in fish kills around the US east coast. ''Pseudopfiesteria shumwayae'' has been described as having a less complex life cycle than ''Pfiesteria piscicida''. Toxicity While toxic strains of ''Pseudopfiesteria shumwayae'' have been implicated in fish kills, its ability to secrete an exotoxin to kill its prey has been subject to controversy. A study published in 2002 has shown that it is capable of killing fish by direct contact and feeding on their skin through micropredation. Toxicity levels appear to depend on the strains and assays use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skin Lesion
A skin condition, also known as cutaneous condition, is any medical condition that affects the integumentary system—the organ system that encloses the body and includes skin, nails, and related muscle and glands. The major function of this system is as a barrier against the external environment. Conditions of the human integumentary system constitute a broad spectrum of diseases, also known as dermatoses, as well as many nonpathologic states (like, in certain circumstances, melanonychia and racquet nails). While only a small number of skin diseases account for most visits to the physician, thousands of skin conditions have been described. Classification of these conditions often presents many nosological challenges, since underlying causes and pathogenetics are often not known. Therefore, most current textbooks present a classification based on location (for example, conditions of the mucous membrane), morphology ( chronic blistering conditions), cause (skin conditions resul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Carolina
North Carolina () is a state in the Southeastern region of the United States. The state is the 28th largest and 9th-most populous of the United States. It is bordered by Virginia to the north, the Atlantic Ocean to the east, Georgia and South Carolina to the south, and Tennessee to the west. In the 2020 census, the state had a population of 10,439,388. Raleigh is the state's capital and Charlotte is its largest city. The Charlotte metropolitan area, with a population of 2,595,027 in 2020, is the most-populous metropolitan area in North Carolina, the 21st-most populous in the United States, and the largest banking center in the nation after New York City. The Raleigh-Durham-Cary combined statistical area is the second-largest metropolitan area in the state and 32nd-most populous in the United States, with a population of 2,043,867 in 2020, and is home to the largest research park in the United States, Research Triangle Park. The earliest evidence of human occupation i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Estuary
An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environments and are an example of an ecotone. Estuaries are subject both to marine influences such as tides, waves, and the influx of saline water, and to fluvial influences such as flows of freshwater and sediment. The mixing of seawater and freshwater provides high levels of nutrients both in the water column and in sediment, making estuaries among the most productive natural habitats in the world. Most existing estuaries formed during the Holocene epoch with the flooding of river-eroded or glacially scoured valleys when the sea level began to rise about 10,000–12,000 years ago. Estuaries are typically classified according to their geomorphological features or to water-circulation patterns. They can have many different names, such as bays, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pamlico River
The Pamlico , from the North Carolina Collection's website at the . Retrieved 2013-02-05. River is a that flows into , in in the United States. It is formed by the confluence of the |
Neuse River
The Neuse River ( , Tuscarora: Neyuherú·kęʔkì·nęʔ) is a river rising in the Piedmont of North Carolina and emptying into Pamlico Sound below New Bern. Its total length is approximately , making it the longest river entirely contained in North Carolina. The Trent River joins the Neuse at New Bern. Its drainage basin, measuring in area, also lies entirely inside North Carolina. It is formed by the confluence of the Flat and Eno rivers prior to entering the Falls Lake reservoir in northern Wake County. Its fall line shoals, known as the ''Falls of the Neuse'', lie submerged under the waters of Falls Lake. This River also creates the beauty of the Neuse River Trail, a long greenway that stretches from Falls Lake Dam, Raleigh, North Carolina to Legend Park, Clayton, North Carolina. Geography The Neuse begins at the confluence of the Flat and Eno rivers near Durham, North Carolina. The river enters Pamlico Sound just east of Maw Point Shoal near Hobucken, North Carolina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suffocation
Asphyxia or asphyxiation is a condition of deficient supply of oxygen to the body which arises from abnormal breathing. Asphyxia causes generalized hypoxia, which affects primarily the tissues and organs. There are many circumstances that can induce asphyxia, all of which are characterized by the inability of a person to acquire sufficient oxygen through breathing for an extended period of time. Asphyxia can cause coma or death. In 2015, about 9.8 million cases of unintentional suffocation occurred which resulted in 35,600 deaths. The word asphyxia is from Ancient Greek "without" and , "squeeze" (throb of heart). Causes Situations that can cause asphyxia include but are not limited to: airway obstruction, the constriction or obstruction of airways, such as from asthma, laryngospasm, or simple blockage from the presence of foreign materials; from being in environments where oxygen is not readily accessible: such as underwater, in a low oxygen atmosphere, or in a vacuum; envir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Menhaden
Menhaden, also known as mossbunker and bunker and "the most important fish in the sea", are forage fish of the genera ''Brevoortia'' and ''Ethmidium'', two genera of marine fish in the family Clupeidae. ''Menhaden'' is a blend of ''poghaden'' (''pogy'' for short) and an Algonquian word akin to Narragansett ''munnawhatteaûg'', derived from ''munnohquohteau'' ("he fertilizes"), referring to their use of the fish as fertilizer. It is generally thought that Pilgrims were advised by Tisquantum (also known as Squanto) to plant menhaden with their crops. Description Menhaden are flat and have soft flesh and a deeply forked tail. They rarely exceed in length, and have a varied weight range. Gulf menhaden and Atlantic menhaden are small oily-fleshed fish, bright silver, and characterized by a series of smaller spots behind the main humeral spot. They tend to have larger scales than yellowfin menhaden and finescale menhaden. In addition, yellowfin menhaden tail rays are a bright ye ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ambush Predator
Ambush predators or sit-and-wait predators are carnivorous animals that capture or trap prey via stealth, luring or by (typically instinctive) strategies utilizing an element of surprise. Unlike pursuit predators, who chase to capture prey using sheer speed or endurance, ambush predators avoid fatigue by staying in concealment, waiting patiently for the prey to get near, before launching a sudden overwhelming attack that quickly incapacitates and captures the prey. The ambush is often opportunistic, and may be set by hiding in a burrow, by camouflage, by aggressive mimicry, or by the use of a trap (e.g. a web). The predator then uses a combination of senses to detect and assess the prey, and to time the strike. Nocturnal ambush predators such as cats and snakes have vertical slit pupils helping them to judge the distance to prey in dim light. Different ambush predators use a variety of means to capture their prey, from the long sticky tongues of chameleons to the expandin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lois Ann Pfiester
Lois Ann Pfiester (November 20, 1936 – September 28, 1992) was an American phycologist and protistologist, specializing in freshwater dinoflagellate species. Biography Pfiester received in 1965 her A.B. from Spalding University, in 1970 her M.A. from Murray State University, and in 1974 her Ph.D. in botany from Ohio State University. She joined in 1974 the faculty of the botany department of the University of Oklahoma as an assistant professor and was a full professor there in 1992 at the time of her death. She directed 4 doctoral dissertations and was the author or coauthor of over 75 journal articles. In 1978 she went to Prague for four weeks to work with the protistologist Jiří Popovský. The two colleagues identified more than 30 different stages to the life cycle of dinoflagellates of the genus ''Cystodinedria''. Pfiester was an associate editor for the ''Journal of Phycology'' from 1980 to 1988. In 1990 she was the president of the Phycological Society of America. Sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Kill
The term fish kill, known also as fish die-off, refers to a localized die-off of fish populations which may also be associated with more generalized mortality of aquatic life.University of Florida. Gainesville, FL (2005) ''Plant Management in Florida's Waters.'' The most common cause is reduced oxygen in the water, which in turn may be due to factors such as drought, algae bloom, overpopulation, or a sustained increase in water temperature. Infectious diseases and parasites can also lead to fish kill. Toxicity is a real but far less common cause of fish kill. Fish kills are often the first visible signs of environmental stress and are usually investigated as a matter of urgency by environmental agencies to determine the cause of the kill. Many fish species have a relatively low tolerance of variations in environmental conditions and their death is often a potent indicator of problems in their environment that may be affecting other animals and plants and may have a direct impact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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