Harmful Algal Information System: Event NO-91-003

General Information

Event name:	NO-91-003
Country:	NORWAY
Nature of the harmful event:	High Phyto concentration , 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 (Same area and same time in 1989 and 1990.)
Individuals to contact:	AKSNES, Dag L.

Location:	Latitude: , Longitude:
General location information:	Ryfylkefjordene., SOUTHWESTERN COAST. HAB Area code(s): NO-09
Additional location information:
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	July-August 91.

Causative organism known:	Yes
Causative Species/Genus:	Prymnesium parvum (100,000,00 cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:	Gobiusculus flavescens died in less than one hour when exposed to concentrations of 4-6 mill cells/L.
Event-related bibliography:

Nutrient information:

PHOSPHATE: weak enrichment in early bloom

Temperature Range During Event:

Max: °C, Min: °C

Salinity Range During Event:

Bloom location in the water column:

Growth:

In situ

Growth Comments

Bloom was extremely local. Some advection within the fjord-system was observed.

Additional Environmental information:

Water exchange was restricted, weak phosphate enrichment was observed during early bloom, extreme P-limitation was observed during late bloom.

Species containing the toxin

Toxin type

Toxin details

Max. concentration

Assay type

Kit used:

Type of kit used:

Additional information:

Economic losses:

Management decision:

Bloom was expected, and both monitoring and research were conducted before, during and after the bloom.

Additional harmful effect information:

Updated at 02:31 on 5 Mar 2018