12th International Conference on Harmful Algae

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INTERNATIONAL SOCIETY FOR THE STUDY OF HARMFUL ALGAE12 th <strong>International</strong> <strong>Conference</strong> on Harmful Algae, Copenhagen, Denmark, 4-8 September 2006ports and harbours varied from oneto six, most belonging to the threecommon genera Gonyaulax,Protoperidinium and Scrippsiella.Six species were harmful: four wereparalytic shellfish poison (PSP)-producers, Gymnodiniumcatenatum, Alexandrium tamarense,A. cf. catenella and A. minutum, andtwo potential yessotoxin/yessotoxinlikeproducers, Protoceratiumreticulatum and Lingulodiniumpolyedrum. Cysts of G. catenatumwere most widespread but confinedmainly to the North Island ports andharbours. They coincidedapproximately with the sites ofspread of G. catenatum bloomsduring the 2000 North Island PSPevents. The possible spread of thisspecies to new areas and potentialinvasive species from othercountries are discussed.PO.13-39Domoic acid in Minke whaleSession: PO.13 - Regional eventsL Stobo, A Scott, EA TurrellFisheries Research Services, ABERDEEN,United KingdomJust as human consumers ofseafood contaminated with algaltoxins are at risk of poisoning, otheranimals in marine food webs areimpacted by these toxins.Documented cases of algal toxinsassociated with cetacean mortalitiesare limited; yet, recent research byscientists (USA and Canada)demonstrated that North Atlanticwhales in the Bay of Fundy areexposed to PSP toxins. In MontereyBay, domoic acid (DA), the ASPtoxin, was reported in humpbackand blue whale faeces followingfeeding on toxic planktivorous fish;demonstrating that algal toxins canbe ingested and pass through thedigestive tract of cetaceans.Recently, using HPLC and LC-MS,we detected DA (0.5 μg/g) in skinand blubber from a Minke whalestranded on the west coast ofScotland during a bloom of DAproducingdiatoms (Pseudonitzschiaaustralis and P. seriata).Little is known about how and towhat extent algal toxins affectmarine mammals. Toxin absorptionacross digestive tract membraneswill play a major role in determiningthe dose interacting with thenervous system via the blood.Humans exposed to DAexperienced nausea, vomiting,dizziness and confusion. If Minkewhales are as sensitive as humansthen they may also be likely victims.PO.12-03Diatoms from coastalenvironments of Buenos AiresProvince (Argentina).Taxonomical analysis of generathat include species producingharmful algal bloomsSession: PO.12 - Taxonomy andPhylogenyInés Sunesen, EA Sar, SE SalaUniversidad Nacional de La Plata, LAPLATA, ArgentinaMany diatoms are involved in HABevents. In addition to domoic acidproducingspecies, the literaturereports cases of severe economiclosses to aquaculture, fisheries andtourism by blooms of harmful nontoxicspecies. In the framework of amonitoring project in Buenos Airescoastal waters, we have detectedseveral of these species.Phytoplankton was collectedmonthly at eight stations, with 30-µm net hauls, and examined withlight and scanning electronmicroscopes. The aim of this study285
INTERNATIONAL SOCIETY FOR THE STUDY OF HARMFUL ALGAE12 th <strong>International</strong> <strong>Conference</strong> on Harmful Algae, Copenhagen, Denmark, 4-8 September 2006is to analyze the specific diversity ofCoscinodiscus, Chaetoceros,Rhizosolenia, Thalassiosira,Cerataulina, Cylindrotheca,Leptocylindrus and Asterionellopsis,to determine their temporal andspatial distribution, to solvetaxonomical/nomenclaturalproblems and to detect blooms ofthe species reported as causingharmful events.Seventy four taxa were determined.Thalassiosira fryxelliae is new toscience, Cerataulina dentata,Chaetoceros filiferus andRhizosolenia hyalina are newrecords for Argentina.Among the potentially noxiousspecies we found Asterionellopsisglacialis, Cerataulina pelagica,Chaetoceros socialis, C. debilis,Coscinodiscus wailesii, C.concinnus, Cylindrothecaclosterium, Rhizosolenia setigera,Thalassiosira curviseriata, T. mala,T. minima and T. minuscula. Someof them were occasionallyabundant, but only Asterionellopsisglacialis has been observedproducing blooms that affected thetourism of the area during summermonths.PO.13-85Recent reports on occurrenceand toxin characterization ofMicrocystis aeruginosa – afreshwater toxic algal bloom fromIndiaSession: PO.13 - Regional eventsM R SuseelaNational Botanical Research Institute,LUCKNOW, IndiaIn our routine fresh water algalfloristic surveys, we have comeacross heavy algal water blooms ofMicrocystis aeruginosa inCosmunda Pond, Champa district,and Kurung Tank, Bilaspur district,both in Chattisgarh State, CentralIndia. The Cosmunda pond waterbloom caused severe fish toll andhuman illness. No human deathswere recorded but heavy liverdamage cases were reported. Thepond is polluted by effluents fromnearby cotton and silk textileindustries. Kurung tank water ispolluted with Jute industry effluents.Vishnoi et al. (2005) reported anabundance of M. aeruginosa in awater pond near Jodhpur, Rajastan,Western India, which was isolatedand used for recovery of textileeffluent. Studies related to thehepatotoxicity were associated withMicrocystis blooms in Central Indiaand reported by Ghosh et al.(2006). Jaiswal et al. (2006)reported on Microcystis strains andcharacterization of biocidalsecondary metabolites. Kumar etal. (2006) surveyed several pondsof Varanas, North India, and foundheavy infestation of Microcystis inseveral ponds. The toxin wasidenfied by the mcyA genesegment.PO.13-49Diarrhetic shellfish toxin links todinophysis populations inCalifornia coastal watersSession: PO.13 - Regional eventsCristy M Sutherland, Mary W SilverUniversity of California, Santa Cruz,SANTA CRUZ, United States of AmericaIn Monterey Bay, California,Dinophysis has recently beenimplicated in the production ofDiarrhetic Shellfish Poisoning (DSP)toxins. Our goal was to determinethe annual Dinophysis cycle andpossible relationship to DSP toxinsin mussels. Collecting water and286
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12th International Conference on Harmful Algae

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