12th International Conference on Harmful Algae

INTERNATIONAL SOCIETY FOR THE STUDY OF HARMFUL ALGAE12 th <strong>International</strong> <strong>Conference</strong> on Harmful Algae, Copenhagen, Denmark, 4-8 September 2006CFP as illustrated by theepidemiological data provided bythe Public Health Directory of Tahiti,as well as fish toxicity data obtainedin our laboratory from 2000 to 2004.Although probably underestimated,an average of 600 cases of CFP isrecorded each year within the fivearchipelagos composing FrenchPolynesia (i.e. Society, Tuamotu,Gambier, Autrales and Marquesas).In 2004, 42% of the cases occurredin the Tuamotu Archipelago.Data obtained from epidemiologicalforms completed by health agentsregarding the symptomsexperienced by the patients and thefish species implicated in CFPcases are compared between allfive archipelagos.Among the 50 fish speciesidentified, the most oftenincriminated species belong tolongface emperor, leopard coralgrouper, humpback red and twospotsnappers, striated surgeonfishand boomerang triggerfish.Toxicity data obtained via theReceptor Binding Assay for variousspecimens of fish collected fromthese five archipelagos areconsistent with these data.PO.10-30Fibrocapsa japonica: apotentially harmful raphidophytein Dutch coastal watersSession: PO.10 - Ecophysiology &autecologyM. K. de Boer 1 , M van Rijssel 1 , EGVrieling 1 , L Peperzak 2 , LPMJ Wetsteyn 3AGJ Buma 11 University of Groningen, HAREN(GRONINGEN), The Netherlands2 Royal NIOZ, DEN BURG, Texel, TheNetherlands3 RIKZ, MIDDELBURG, The NetherlandsEcophysiological studies on a WestEuropean strain of Fibrocapsajaponica indicate that thisraphidophyte must be able tomaintain itself in Dutch coastalwaters. The experimental data havenow been correlated to extensivephytoplankton field data of theDutch coastal waters over theperiod 1990-2003. The Dutchcoastal zone clearly meets theecophysiological requirements of F.japonica; the area possibly belongsto its northern biogeographicboundary, explaining whyvegetative cells have never beenobserved at higher latitudes.Moreover, the field data stronglysuggest that besides F. japonicaother raphidophytes such asChattonella spp. and Heterosigmaakashiwo have establishedthemselves in this region. In thesurface water samples, F. japonicaand Chattonella spp. have beenobserved almost the year round,even at low temperatures just above4 °C. Fibrocapa japonica candominate the phytoplanktoncommunity in Dutch coastal watersduring short term blooms, not onlyin summer but also at lowertemperatures (< 15 °C) duringspring. Despite the presence ofhaemolytic and toxic components inthis raphidophyte, harmful eventshave not been observed.PO.05-43Application of capillaryelectrophoresis-massspectrometry to thedetermination of lipophilic marinetoxinsSession: PO.05 - Toxin analysisPablo de la Iglesia 1 , A Gago-Martinez 1 ,T Yasumoto 21 University of Vigo, VIGO, Spain159