Toxic marine microalgae

Daranas, Antonio Hernández; Norte, Manuel; Fernández, José J.

doi:10.1016/s0041-0101(00)00255-5

Cited by 189 publications

(94 citation statements)

References 108 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Lipophilic biotoxins are toxic compounds mainly produced by species of the genera Dinophysis, Prorocentrum, Protoceratium, Gonyaulax, Lingulodinium, Protoperidinium and Azadinium (Daranas et al 2001, Paz et al 2004, Tillmann et al 2009). The main toxin groups included are okadaic acid (OA) and dinophysistoxins (DTX), pectenotoxins (PTX), yessotoxins (YTX) and azaspiracids (AZA).…”

Section: Introductionmentioning

confidence: 99%

Climate influence on Dinophysis spp. spatial and temporal distributions in Greek coastal water

Vlamis¹,

Katikou²

2014

Plankton Benthos Res

View full text Add to dashboard Cite

Presence of Dinophysis spp., the main phytoplankton genus responsible for the occurrence of lipophilic biotoxins of the okadaic acid group (Diarrhetic Shellfish Poisoning; DSP) in Greek mussels, was recorded in the period 2003-2008 in five major mussel culture areas of Greece. Dinophysis spp. abundances were simultaneously studied with climatological parameters (air temperature, rainfall, wind direction and velocity) and the occurrence of DSP toxic episodes in mussels. Dinophysis spp. blooms occurred with a seasonal periodicity. Highest cell abundances of the bloom appeared steadily between late winter and spring, whereas occurrence of DSP toxicity in mussels followed a similar time pattern, with mouse bioassay-positive samples ranging between 10.2-28.1% of the total samples analysed. Maximum mean Dinophysis spp. counts coincided with air temperatures in the range of 10-20°C; abundances higher than 1,000 cells L 1 were more frequently recorded at air temperatures in the range of 4-20°C in combination with low rainfall and low velocity winds (

show abstract

Section: Introductionmentioning

confidence: 99%

Climate influence on Dinophysis spp. spatial and temporal distributions in Greek coastal water

Vlamis¹,

Katikou²

2014

Plankton Benthos Res

View full text Add to dashboard Cite

show abstract

“…DSTs are potent protein phosphatase inhibitors, subsequently causing a dramatic increase in phosphorylation of numerous proteins resulting in diarrhoeic effects, as well as being potent tumour promoters (e.g. Fujiki et al 1988, Daranas et al 2001.…”

Section: Introductionmentioning

confidence: 99%

Oceanographic settings explain fluctuations in Dinophysis spp. and concentrations of diarrhetic shellfish toxin in the plankton community within a mussel farm area on the Swedish west coast

Godhe¹,

Svensson²,

Rehnstam-Holm³

2002

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

The influence of hydrographic, biological and meteorological variables on the abundance of Dinophysis spp. and the concentration of diarrhetic shellfish toxin (DST) in the plankton population were investigated in a mussel (Mytilus edulis) farm area on the Swedish west coast. This location provided an opportunity to simultaneously compare Dinophysis spp. cell numbers, concentration of DST in natural phytoplankton assemblages and toxicity of mussel tissues. Sampling was performed every other day from October 10 to November 5, 2000, and on each occasion, 5 randomly selected sites were sampled. During this period, 3 distinct water masses passed through the vicinity of the mussel farm. The second water mass, characterized by low salinity and nitrogen concentration, was probably advected into the area from surface waters in the nearby Skagerrak. This low salinity water also contained a high abundance of Dinophysis spp., and high concentrations of DST were recorded in the phytoplankton population. Multivariate analysis (projection to latent structures by means of partial least squares, PLS) determined that the principal variables influencing the concentration of DST in the plankton assemblage were the causative species (D. acuminata, D. acuta and D. norvegica) and salinity. The abundance of the 3 Dinophysis spp. was inversely correlated to salinity. A rapid increase in the toxicity of mussels in response to the high levels of DST was observed. The concentration of DST had doubled within 2 d of the appearance of Dinophysis spp. After 8 d, the water mass containing Dinophysis spp. was replaced and cell numbers again returned to low levels. The concentration of DST in the phytoplankton samples remained high for another 2 d after the number of Dinophysis spp. had declined and the toxicity of mussels continued to be high for the remainder of the study. Causes of the rapid intoxication versus slow detoxification of mussels are discussed. These results suggest that present monitoring programs are insufficient to provide early warning of toxic blooms to aquaculturists on the Swedish west coast.

show abstract

“…has grown substantially in recent years (BALDAN; BENDHACK, 2009). The dependence of traditional communities on fishery products as well as an increase in the consumption of bivalve mollusks from this bay raises a concern about human poisoning due to the consumption of products contaminated with algal toxins (PERL et al, 1990;CARVALHO et al, 1998;DARANAS et al, 2001;REIZOPOULOU et al, 2008;ETHERIDGE, 2010). The fear that such events could occur in Guaratuba Bay is reinforced by the presence of toxin-producing microalgae in nearby locations, including that of species that cause diarrhetic shellfish poisoning (DSP) and amnesic shellfish poisoning (ASP) (MAFRA Jr. et al, 2006;ODEBRECHT et al, 2002;PROCOPIAK et al, 2006;PROENÇA, 2006;BRANDINI, 2010;FERNANDES et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…The main toxins responsible for DSPokadaic acid (OA) and its analogs, the dinophysistoxins (DTXs) -are produced by dinoflagellates of the genera Dinophysis and Prorocentrum (DARANAS et al, 2001;TOYOFUKU, 2006;GERSSEN et al, 2010). These toxins affect humans through the consumption of bivalve mollusks, which accumulate the toxic compounds in their tissues (REIZOPOULOU et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

SEASONAL AND SPATIAL PATTERNS OF TOXIGENIC SPECIES OF Dinophysis AND Pseudo-nitzschia IN A SUBTROPICAL BRAZILIAN ESTUARY

2015

View full text Add to dashboard Cite

in Guaratuba Bay, Paraná state, Brazil, where aquaculture has been intensified in recent years. The highest abundances of Pseudo-nitzschia calliantha and P. pungens (up to 7.3 x 104 cells L -1 ), diatoms which cause amnesic shellfish poisoning (ASP), were correlated with higher values of temperature (from December to April, salinity (>20) and silicate concentrations (ranging from 6.0 to 90.0 µm). The occurrence of these harmful diatoms in the bay also appeared to depend upon the development of seeding mechanisms in the adjacent coastal water and its subsequent advection by tidal currents to the interior of the estuary. During the study period, Pseudo-nitzschia cell abundance remained low to moderate probably as a result of growth limitation by phosphate shortage, especially in the outer area of the estuary. In addition, harmful species of Dinophysis, dinoflagellates responsible for diarrhetic shellfish poisoning (DSP) events, were recorded in every sampling campaign. The highest abundances of D. acuminata, D. caudata and D. tripos were associated with the upper halocline layer in regions of the bay where water column stratification was more frequent. On some occasions, cell abundances of D. acuminata (up to 3.2 x 10³ cells L -1 ) exceeded levels considered harmful in areas used to cultivate bivalve mollusks for human consumption. These novel results strongly indicate the necessity of implementing a monitoring program for harmful microalgae in Guaratuba Bay. R E S U M OEste estudo investigou a distribuição espacial e temporal de espécies toxigênicas de fitoplâncton entre outubro de 2010 e abril de 2012 na Baía de Guaratuba, Estado do Paraná, Brasil, onde as atividades de maricultura têm se intensificado nos últimos anos. As maiores abundâncias de Pseudo-nitzschia calliantha e P. pungens (até 7,3 x 104 células L -1 ), diatomáceas causadoras do envenenamento amnésico por consumo de molusco (ASP), foram correlacionadas com valores mais elevados de temperatura (de dezembro a abril), salinidade (>20) e concentrações de silicato (variando de 6,0 a 90,0 µM). A ocorrência destas diatomáceas na baía aparentemente depende do desenvolvimento de mecanismo de inoculação na água costeira adjacente e de seu subsequente transporte pelas correntes de maré para o interior do estuário. Durante o período de estudo, no entanto, a abundância celular de Pseudo-nitzschia permaneceu baixa, provavelmente devido à limitação do crescimento por falta de fosfato, especialmente na área externa. Além disso, espécies nocivas de Dinophysis, um dinoflagelado responsável pela produção de toxinas diarreicas (DSP), foram registradas em todas as campanhas mensais de amostragem. As maiores abundâncias de D. acuminata, D. caudata e D. tripos foram associadas com a camada logo acima da haloclina, nas regiões da baía onde a estratificação da coluna de água foi mais frequente. Em algumas ocasiões, a abundância de células de D. acuminata (até 3,2 x 10³ células L -1 ) em áreas utilizadas para cultivo de moluscos bivalves para consumo humano, superou níveis c...

show abstract

Toxic marine microalgae

Cited by 189 publications

References 108 publications

Climate influence on Dinophysis spp. spatial and temporal distributions in Greek coastal water

Climate influence on Dinophysis spp. spatial and temporal distributions in Greek coastal water

Oceanographic settings explain fluctuations in Dinophysis spp. and concentrations of diarrhetic shellfish toxin in the plankton community within a mussel farm area on the Swedish west coast

SEASONAL AND SPATIAL PATTERNS OF TOXIGENIC SPECIES OF Dinophysis AND Pseudo-nitzschia IN A SUBTROPICAL BRAZILIAN ESTUARY

Contact Info

Product

Resources

About