Harmful Algal Information System: Event PT-92-001

General Information

Event name:	PT-92-001
Country:	PORTUGAL
Nature of the harmful event:	Seafood toxins
Event directly affected:
Toxicity detected:	Yes (Approximate range: 500 µg 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:	Yes (At this southern part of the country this year was the first with values of PSP over 80 µg/100g in bivalves.)
Individuals to contact:	SAMPAYO, Mª Antonia , VILARINHO, Mª da Graça

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Algarve coast., Algarve. HAB Area code(s): PT-06 PT-07
Additional location information:
Bloom event dates (yyyy/mm/dd):	Event Date:1992-07-21
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	June-July.

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Gymnodinium catenatum (13,600 cells/L) Off Algarve July 21.
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known:	µg/l
Additional bloom information:
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: 20 °C, Min: 15 °C

Salinity Range During Event:

Max: 36, Min: 34

Bloom location in the water column:

Growth:

Advected
In situ

Growth Comments

Most probably a combination fo both.

Additional Environmental information:

Toxin Assay Information

Species containing the toxin	Toxin type	Toxin details	Max. concentration	Assay type
Spisula solida	Saxitoxins	STX eq		Bioassay-Mouse
Venus gallina	Saxitoxins	STX eq		LC
Mytilus edulis	Saxitoxins	STX eq		LC
Ostrea edulis	Saxitoxins	STX eq		LC

Kit used: No

Type of kit used:

Additional information:

Economic losses:

Management decision:

Bivalve species with PSP values over 80 µg/100g closed to harvest.

Additional harmful effect information:

Most of the bivalve molluscs from these regions presented PSP toxins however some of them did not reach the 80 µg/100 g threshold, the most affected were: - Algarve coast: Spisula solida, Venus gallina, Mytilus edulis and Ostrea edulis

Checked at 05:37 on 22 Feb 2018