What toxin does Dinophysis produce?
okadaic acid
Dinophysis have cryptophyte-like pigments and at least seven species of Dinophysis contain diarrheic shellfish toxins. Toxic Dinophysis produce okadaic acid, dinophysistoxins, and pectenotoxins, which inhibit protein phosphatase and produce diarrhea.
What is Dinophysis spp?
Species Distribution: Dinophysis species are dinoflagellates that produce the toxin okadiac acid and dinophysis toxins. These species are generally found worldwide, including populations in North America and along the northeast coast of the United States and the Gulf of Mexico.
What is Dinophysis caudata?
Dinophysis caudata is an armoured, marine, planktonic dinoflagellate species. It is a bloom-forming species associated with massive fish kills. It is commonly found world-wide in subtropical and tropical neritic waters.
What does Dinophysis eat?
Dinophysis acuminata is basically a heterotroph feeding on the ciliate Mesodinium rubrum. M. rubrum in turn feeds on green algae that contain plastids.
Why is Dinophysis harmful?
The toxic dinoflagellate alga Dinophysis threatens human health and coastal economies through the production of toxins which cause diarrhetic shellfish poisoning (DSP) in humans. Blooms of Dinophysis and associated DSP poisoning events are a challenge for shellfish fisheries and aquaculture.
What organisms are affected by DSP?
Although DSP is reported worldwide, the most highly affected areas appear to be Europe and Japan (Aune & Yndstad 1993). The causative organisms are the marine dinoflagellates Dinophysis, although there is an uneven distribution among species and location of toxin production.
What does prorocentrum Lima do?
Prorocentrum lima is a toxic dinoflagellate species known to produce a number of toxic substances: fast-acting toxin (FAT) (Tindall et al., 1989); prorocentrolide (Torigoe et al., 1988); and DSP-toxins (Yasumoto et al., 1987): okadaic acid (OA) (Murakami et al., 1982, Lee et al., 1989, Marr et al., 1992); …
What is domoic acid poisoning?
Domoic acid (DA) is a kainic acid-type neurotoxin that causes amnesic shellfish poisoning (ASP). It is produced by algae and accumulates in shellfish, sardines, and anchovies. When sea lions, otters, cetaceans, humans, and other predators eat contaminated animals, poisoning may result.
What toxin causes DSP?
Diarrhetic Shellfish Poison (DSP) is a marine biotoxin toxin produced by the dinoflagellate Dinophysis, which is a type of naturally occurring microscopic algae. Shellfish eat these algae and can retain the toxin. People can become ill from eating shellfish contaminated with Diarrhetic Shellfish Poison.
Does Karenia brevis cause red tide?
What is it? In Florida, red tide is caused by the accumulation of Karenia brevis, a type of single-celled organism called a dinoflagellate. Red tides occur around the world and are not all caused by the same species, nor are they always red. In fact, most dinoflagellates are harmless.
What does Karenia brevis look like?
Karenia brevis is a microscopic, single-celled, photosynthetic organism in the genus Karenia. It is a marine dinoflagellate commonly found in the waters of the Gulf of Mexico. K. brevis has been known to travel great lengths around the Florida peninsula and as far north as the Carolinas.