Harmful Algal Information System: Event NO-93-002

General Information

Event name:	NO-93-002
Country:	NORWAY
Nature of the harmful event:	Mass mortalities
Event directly affected:
Toxicity detected:	Yes
Associated syndrome:	OTHER
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:	DAHL, Einar , MARTINUSSEN, Ingrid

Location & Date

[View larger map]

Location:	Latitude: , Longitude:
General location information:	Byfjorden Bergen., West Coast. HAB Area code(s): NO-08
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	May.

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Chrysochromulina sp. ( cells/L) Identified in EM by Wenche Eikrem, Oslo Univ.
Co-Ocurring Species/Genus:	Skeletonema costatum ( cells/L) Emiliania huxleyi ( cells/L)
Chlorophyll concentration, if known:	µg/l
Additional bloom information:	Chrysochromulina sp. was mixed up with Chaetoceros wighamii and Skeletonema costatum. A mixed bloom of Emiliana huxleyi and diatoms was going on in adjacent fjords, which were under the influence of the Norwegian coastal current.
Event-related bibliography:

Environmental Conditions

Weather:		Turbidity (NTU):	3	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: 13 °C, Min: 12 °C

Salinity Range During Event:

Max: 18, Min: 15

Bloom location in the water column:

Growth:

In situ

Growth Comments

The bloom probably started in a cove with some advection into the fjord.

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:

The water showed positive synaptosome test when tested for toxicity. Anne Sophie Meldahl, Norwegian Defence Research Establishment, division for Environmental Toxicology.

Economic losses:

Management decision:

Additional harmful effect information:

Updated at 02:35 on 5 Mar 2018