General Information

Event name: DK-94-001
Country: DENMARK
Nature of the harmful event:
High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected: Yes
Associated syndrome: DSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: No
Individuals to contact: ANDERSEN, Per

Location & Date

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Location: Latitude: , Longitude:
General location information: ,
HAB Area code(s): DK-04
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Pseudo-nitzschia delicatissima ( cells/L)
Low concentration.
Gyrodinium sp. ( cells/L)
Gyrodinium cf. Aureolum. Low concentration
Dinophysis rotundata ( cells/L)
Low concentration
Dinophysis acuta ( cells/L)
Low concentration
Dinophysis norvegica ( cells/L)
Low concentration
Alexandrium tamarense ( cells/L)
Low concentration
Alexandrium ostenfeldii ( cells/L)
Low concentration
Noctiluca scintillans ( cells/L)
High concentration.
Gymnodinium sanguineum ( cells/L)
High concentration
Prorocentrum micans ( cells/L)
High concentration.
Prorocentrum minimum ( cells/L)
High concentration.
Dinophysis acuminata ( cells/L)
High concentration
Pseudo-nitzschia seriata ( cells/L)
Low concentration.
Chrysochromulina spp. ( cells/L)
Low concentration
Phaeocystis pouchetii ( cells/L)
Low concentration
Nodularia spumigena ( cells/L)
Low concentration
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: The phytoplakton situation during 1994 was characterized by high concentrations and biomasses in the summerperiod, dominated by diatoms e.g. Rhizosolenia fragilissima and Skeletonema costatum and dinoflagellates Prorocentrum minimum and Prorocentrum mican
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information: The high biomasses were the result of high external input from run-off from land during the winter and spring period, followed by high internal input of inorganic nutrients from the sediments as a result of oxygen deficiency in the exceptieonally calm and

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: Harvesting for mussels were closed or restricted in most areas on the east coast of Jutland and in Isefjorden from May to September, and in one area in the Limfjord in mostof june as well in two areas in the period from October to November because of high
Additional harmful effect information: DSP toxins were registered at the east coast of Jutland (August), possibly in the Isefjorden (July) as well as in two areas in the Danish Waddensea region (August) (Figures 3 and 4). PSP and ASP were not registered in 1994.
Updated at 05:05 on 8 Sep 2019