General Information

Event name: US-92-018
Nature of the harmful event:
Mass mortalities
Event directly affected:
Aquaculture Fish
Toxicity detected: No
Associated syndrome:
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: CHAPMAN, Pat

Location & Date

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Location: Latitude: , Longitude:
General location information: Glen Ayr Marina, Hoodsport., Washington.
HAB Area code(s): US-23
Additional location information: Glen Ayr Marina, Hoodsport, southern Hood Canal, Washington.
Bloom event dates (yyyy/mm/dd): Event Date:1992-04-29
Start: 1992-04-29,
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: No
Causative Species/Genus:
Co-Ocurring Species/Genus: Pseudo-nitzschia pungens ( cells/L)
Pseudo-nitzschia pungens f. Pungens
Chlorophyll concentration, if known: µg/l
Additional bloom information: Causative specie unknown, but a 28-30 Ám diameter, pigmented, gymnodinium-like dinoflagellate was present. Also Pseudonitzschia pungens f. pungens.
Event-related bibliography:

Environmental Conditions

Weather: Weather had been cluody and rainy for previuos 5 days. Wind the next day and bloom gone. 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: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
In situ
Growth Comments Probably in situ growth; water brown, bloom extended about 1/2 mile from site.
Additional Environmental information: Water conditions were normal.

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Fish were released from net pens; probably few survived.
Additional harmful effect information: