Harmful Algal Information System: Event PT-93-003

General Information

Event name:	PT-93-003
Country:	PORTUGAL
Nature of the harmful event:	Seafood toxins
Event directly affected:
Toxicity detected:	Yes (Approximate range: 1,185 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 (Since 1986 and until 1990 Gymnodinium catenatum was responsible for PSP occurrences at the portuguese coast north from Roca cap. In 1991 the problem did not occur and in 1992 it appeared again but displaced from the usual area, now at the south coast of Lisbon and at the Algarve coast.)
Individuals to contact:	SAMPAYO, Mª Antonia , VILARINHO, Mª da Graça

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Setúbal coast., HAB Area code(s): PT-05
Additional location information:
Bloom event dates (yyyy/mm/dd):	Event Date:1993-03-12
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:	January-May.

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Gymnodinium catenatum (26,200 cells/L) July 20th.
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: 14 °C

Salinity Range During Event:

Max: 36, Min: 20

Bloom location in the water column:

Growth:

Advected
In situ

Growth Comments

Most probably a combination of both.

Additional Environmental information:

Toxin Assay Information

Species containing the toxin

Toxin type

Toxin details

Max. concentration

Assay type

Kit used: No

Type of kit used:

Additional information:

Accumulated in Callista chione, Ensis siliqua, Donax trunculus, Chamalea striatula and Venus verrucosa.

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. - Setúbal coast: Ensis siliqua, Callista chione, Donax trunculus, Chamalea striata and Venus verrucosa.

Checked at 05:36 on 22 Feb 2018