Harmful Algal Information System: Event NL-94-001

General Information

Event name:	NL-94-001
Country:	NETHERLANDS
Nature of the harmful event:	Seafood toxins
Event directly affected:	Humans
Toxicity detected:	Yes
Associated syndrome:	DSP
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):	Mussels (Mytilus edulis).
Report the outcome of a monitoring programme:	Yes (RIVO-DLO Early Warning System. DLO Netherlands Institute for Fishery Research.)
Event occurred before in this location:	No
Individuals to contact:	PEPERZAK, Louis

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Lake Grevelingen., HAB Area code(s): NL-03
Additional location information:	Western part of the lake.
Bloom event dates (yyyy/mm/dd):	Event Date:1994-07-20
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	July- October.

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Dinophysis acuminata (4,000 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:	D. acuminata counts reverted to nil by the first week of September.
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: 18 °C, Min: °C

Salinity Range During Event:

Bloom location in the water column:

Growth:

Growth Comments

Additional Environmental information:

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:

The opening of the oyster harvesting season was delayed until October.

Additional harmful effect information:

No toxicity was found in oysters (Ostrea edulis). As the monitoring program for toxicity is restricted to the oyster harvesting starting in September, toxicity was only detected after a number of people became intoxicated after aeating mussels, hand-colle

Updated at 04:10 on 28 Feb 2018