Harmful Algal Information System: Event NO-92-002

General Information

Event name:	NO-92-002
Country:	NORWAY
Nature of the harmful event:	Mass mortalities
Event directly affected:
Toxicity detected:	No
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:	Yes (Gyrodinium bloomed in the area in 1966, 1976, 1981, 1982, 1985, 1988, 1990, 1991.)
Individuals to contact:	DAHL, Einar

Location:	Latitude: , Longitude:
General location information:	, SOUTHERN AND SOUTHWESTERN COAST HAB Area code(s): NO-09 NO-10 NO-11
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	September.

Causative organism known:	Yes
Causative Species/Genus:	Gyrodinium sp. (10,000,000 cells/L) Gyrodinium cf. Aureolum.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:	Gyrodinium cf. aureolum, up to 10-20 million Cells/L were recorded in small patches in the Flekkefjord area, but normally the recording were from some hundred thousands to a few million cells per litre.
Event-related bibliography:

Nutrient information:

Temperature Range During Event:

Max: 15 °C, Min: 13 °C

Salinity Range During Event:

Bloom location in the water column:

Growth:

Advected
In situ

Growth Comments

Bloom due to a combination of advected and in situ growth.

Additional Environmental information:

The temperature was mainly within 13-15� C in waterbodies with high concentrations of Gyrodinium.

Species containing the toxin

Toxin type

Toxin details

Max. concentration

Assay type

Kit used:

Type of kit used:

Additional information:

Economic losses:

Management decision:

Intensified local algae monitoring. Deep cages did probably save most of the farms in the area from large losses.

Additional harmful effect information:

Updated at 04:06 on 2 Dec 2019