Harmful Algal Information System: Event CA-94-007

General Information

Event name:	CA-94-007
Country:	CANADA
Nature of the harmful event:	Seafood toxins
Event directly affected:
Toxicity detected:	Yes (Approximate range: 420 痢 STXeq / 100 g.)
Associated syndrome:	PSP
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:	PARANJAPE, Madhu A. , POWELL, J. Conrad

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Notre Dame Bay, Newfoundland Region HAB Area code(s): CA-27
Additional location information:	Various sites in Notre Dame Bay.
Bloom event dates (yyyy/mm/dd):	Event Date:2000-07-14
Quarantine levels dates (yyyy/mm/dd):	First detection: 2000-07-14, End: 2000-10-15
Additional date-related information:	August -October. closure Middle Arm Green Bay

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Alexandrium fundyense ( cells/L) Implicated. Prorocentrum sp. ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:	Alexandrium fundyense implicated. Other potentially toxic species of dinoflagellate Prorocentrum sp. were also present in small numbers.
Event-related bibliography:

Environmental Conditions

Weather:		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:

Growth:

Growth Comments

Unknown. There are several sites on the south and east coast of Newfoundland where hypnozygote of Alexandrium fundyense have been found in the sediment. Resuspension and ingestion of these cysts by mussels may also be one of the causes of toxicity.

Additional Environmental information:

Environment: NA.

Toxin Assay Information

Species containing the toxin	Toxin type	Toxin details	Max. concentration	Assay type
Shellfish meat	Saxitoxins	STX eq	Trace to 420	Bioassay-Mouse

Kit used:

Type of kit used:

Additional information:

Economic losses:

Management decision:

Entire Bay closed for all shellfish harvesting in August 1994 and reopened for harvesting in October 1994.NTN 2000 -01 and NTN 2000 -02

Additional harmful effect information:

Effects: NA.

Updated at 06:22 on 21 Sep 2018