General Information

Event name: NL-00-001
Nature of the harmful event:
Mass mortalities
Event directly affected:
Natural Fish
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: Yes (Toxins presumably produced by P.parvum.)
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Phytoplankton and nutrients (water wuality) by)
Event occurred before in this location: No
Individuals to contact: PEPERZAK, Louis

Location & Date

[View larger map]
Location: Latitude: 51.483056, Longitude: 4.266667
General location information: Binnenshelde., Netherlands.
HAB Area code(s): NL-03
Additional location information: Brackish water lake of 2.5 km2. ICES fishing area: IV c.
Bloom event dates (yyyy/mm/dd): Start: 2000-04-06, End: 2000-05-08
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: First phytoplankton sample on 6/4/00 when first fish had died; on 8/5/00 Prymnesium concentration had declined with more than 50%.


Causative organism known: Yes
Causative Species/Genus: Prymnesium sp. (100 x (10) cells/L)
Prymnesium cf. Parvum. LM identification
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information: Addiotional species: Cyanobacteria.
Event-related bibliography:

Environmental Conditions

Weather: Sunny. Turbidity (NTU): Wind direction: N
Stratified water: Oxygen content (nL/L): Wind velocity: 5-10
Temperature (°C): 9.0 Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: 1.07 Current Velocity: 0
Nutrient information: AMONIUM: 2 ÁM/L
NITRATE: Below detection limits.
NITRITE: Below detection limits.
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
In situ
Growth Comments
Additional Environmental information: Direction and velocity of the Current were negligable. pH: 9.0. Wind velocity: 5-10 m/s. Location in the water column: Unknown.

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: Shores of lake barred with barbed wire and notice boards placed.
Additional harmful effect information:
Updated at 04:09 on 28 Feb 2018