red tide


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red tide

natural (and common) phenomenon causing massive extermination of fish and other marine life; caused by algae Karenis brevis or efflorescence of Pfeisteria piscicida.
[in high concentrations of organism, water turns reddish-brown]

red tide

n.
A bloom of plankton, especially dinoflagellates, that causes a usually reddish discoloration of coastal ocean waters. Certain dinoflagellates produce toxins that contaminate shellfish, making them unsafe to eat, and can kill fish.

red tide

Environment Harmful algal bloom A body of sea water with high concentrations of dinoflagellates, in which massive algal proliferation imparts a reddish colour to the surface, first described in the Gulf of Maine—US
Management Supportive
Under optimal salinity, temperature and nutrient conditions, marine algae, Gonyaulax catanella and G tamarensis proliferate, producing saxitoxin—a potent neuromuscular toxin that blocks voltage-dependent sodium channels in neurons; not all red tides are toxic and some outbreaks of ‘red tide disease’ occur without the red tide; Gymnodinium breve causes red tide off Florida and in the Gulf of Mexico, but evokes milder neurotoxic reactions—e.g., paraesthesias, abnormal temperature sensation, ataxia, nausea, vomiting and diarrhoea. Saxitoxin concentrates in clams and shellfish—but not in lobster or finned fish; birds, mammals, humans feeding on the shellfish rapidly develop neuromuscular blockade with intense centripetal paresthesias, nausea, vomiting, diarrhea, later vertigo, numbness of face and scalp, sensory loss, dysphagia, dysarthria, intention tremor; if severe, intoxication may cause flaccid quadriplegia or respiratory paralysis and death
Infectious disease A popular phrase from the 1950s that died in the 1960s, for the increased prominence of gram-negative—i.e., ‘red’—bacterial infections, attributed to the indiscriminate use of the first antibiotic, penicillin—which is most effective against gram-positive cocci for most infections—resulting in a relative increase in incidence of gram-negative bacterial infections, causing a ‘red’ shift

red tide

(red tīd)
A natural phenomenon resulting from higher than normal concentrations of the microscopic algae Gymnodinium breve in seawater. When the causative organism is extremely concentrated, seawater can turn a reddish-brown color.

red tide

a bloom of DINOFLAGELLATES which literally turns the sea red. The toxins produced by them, concentrated in shell-fish which may feed upon them, can be fatal to humans.
References in periodicals archive ?
There is a certain regularity between the occurrence of red tide and the changes of environmental factors, such as meteorological conditions, oceanographic processes, and ecological factors.
Red tides happen every year, but no one knows why the one in 2012 was so bad.
Red tide then can affect an entire industry harvesting blue mussels, surf clams, snails, scallops, oysters and soft-shelled clams.
brevis (> 1,000 to <5,000 cells/L) and "present" levels ([less than or equal to] 1,000 cells/L), indicating that the storm likely contributed to dissipation of the red tide (Table 2).
Commonly called red tides regardless of their color, toxic algal blooms frequently occur in the shallow waters off Florida's west-central coast.
As the name suggests, red tide is characterized by an explosive growth of microscopic plant-like cells along the Florida coast that often turns the water a reddish-brown color.
In May 2004, a particularly severe red tide swept 8,000 square km of the East China Sea near Zhejiang Province because of pollution from the nearby Yangtze River.
The red tide can be turned, but to do it, the California Democratic Party needs to embrace its own base and grow outward - and it needs to do it now.
Thus, there is a high possibility that bivalve larvae frequently encounter red tide dinoflagellates.
From 1976 until 1994 there was an hiatus of red tide blooms.
The same red tide swells near the end of the exhibition in Deluge II, 1975, which shows the recumbent painter sticking his brush up Into a red sea of heads, bottles, shoes, legs, frames, and books.
Schaeffer's S&P 500 Index Hot Stocks for Friday, August 11, 2006: PMC-Sierra Manages to Ride Above Fed's Red Tide