Marine and Fresh-Water Harmful Algae
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Microorganisms
microorganisms Review The Genetic Basis of Toxin Biosynthesis in Dinoflagellates Arjun Verma 1,* , Abanti Barua 1,2, Rendy Ruvindy 1, Henna Savela 3, Penelope A. Ajani 1 and Shauna A. Murray 1 1 Climate Change Cluster, University of Technology Sydney, Sydney 2007, Australia 2 Department of Microbiology, Noakhali Science and Technology University, Chittagong 3814, Bangladesh 3 Finnish Environment Institute, Marine Research Centre, 00790 Helsinki, Finland * Correspondence: [email protected] Received: 22 June 2019; Accepted: 27 July 2019; Published: 29 July 2019 Abstract: In marine ecosystems, dinoflagellates can become highly abundant and even dominant at times, despite their comparatively slow growth rates. One factor that may play a role in their ecological success is the production of complex secondary metabolite compounds that can have anti-predator, allelopathic, or other toxic effects on marine organisms, and also cause seafood poisoning in humans. Our knowledge about the genes involved in toxin biosynthesis in dinoflagellates is currently limited due to the complex genomic features of these organisms. Most recently, the sequencing of dinoflagellate transcriptomes has provided us with valuable insights into the biosynthesis of polyketide and alkaloid-based toxin molecules in dinoflagellate species. This review synthesizes the recent progress that has been made in understanding the evolution, biosynthetic pathways, and gene regulation in dinoflagellates with the aid of transcriptomic and other molecular genetic tools, and provides a pathway for future studies of dinoflagellates in this exciting omics era. Keywords: dinoflagellates; toxins; transcriptomics; polyketides; alkaloids 1. Introduction Marine microbial eukaryotes are a diverse group of organisms comprising lineages that differ widely in their evolutionary histories, ecological niches, growth requirements, and nutritional strategies [1–5]. -
Influence of Environmental Parameters on Karenia Selliformis Toxin Content in Culture
Cah. Biol. Mar. (2009) 50 : 333-342 Influence of environmental parameters on Karenia selliformis toxin content in culture Amel MEDHIOUB1, Walid MEDHIOUB3,2, Zouher AMZIL2, Manoella SIBAT2, Michèle BARDOUIL2, Idriss BEN NEILA3, Salah MEZGHANI3, Asma HAMZA1 and Patrick LASSUS2 (1) INSTM, Institut National des Sciences et Technologies de la Mer. Laboratoire d'Aquaculture, 28, rue 2 Mars 1934, 2025 Salammbo, Tunisie. E-mail: [email protected] (2) IFREMER, Département Environnement, Microbiologie et Phycotoxines, BP 21105, 44311 Nantes, France. (3) IRVT, Institut de la Recherche Vétérinaire de Tunisie, centre régional de Sfax. Route de l'aéroport, km 1, 3003 Sfax, Tunisie Abstract: Karenia selliformis strain GM94GAB was isolated in 1994 from the north of Sfax, Gabès gulf, Tunisia. This species, which produces gymnodimine (GYM) a cyclic imine, has since been responsible for chronic contamination of Tunisian clams. A study was made by culturing the microalgae on enriched Guillard f/2 medium. The influence of growing conditions on toxin content was studied, examining the effects of (i) different culture volumes (0.25 to 40 litre flasks), (ii) two temperature ranges (17-15°C et 20-21°C) and (iii) two salinities (36 and 44). Chemical analyses were made by mass spectrometry coupled with liquid chromatography (LC-MS/MS). Results showed that (i) the highest growth rate (0.34 ± 0.14 div d-1) was obtained at 20°C and a salinity of 36, (ii) GYM content expressed as pg eq GYM cell-1 increased with culture time. The neurotoxicity of K. selliformis extracts was confirmed by mouse bioassay. This study allowed us to cal- culate the minimal lethal dose (MLD) of gymnodimine (GYM) that kills a mouse, as a function of the number of K. -
Certified Calibration Solution for Yessotoxin
CRM-YTX-c (Lot # 20151125) Certified Calibration Solution for Yessotoxin The yessotoxins (YTXs) are a group of polycyclic ether compounds produced by various dinoflagellate algae including Protoceratium reticulatum, Lingulodinium polyedrum and Gonyaulax spinifera [1]. The maximum allowable levels of certain YTXs in shellfish for human consumption is regulated [2]. CRM-YTX-c is a certified calibration solution of YTX in methanol and is a replacement for CRM-YTX-b, which was released in 2012. Table 1: Certified concentration value for CRM-YTX-c Compound µmol/L (at +20 °C) Yessotoxin (protonated form) 4.3 ± 0.2 NaO3SO HO H O H H O NaO3SO H H O H H O O H H O H H H H H O O H O O H OH H H O Yessotoxin (protonated form) CAS registry No.: 112514-54-2 Molecular formula: C55H82O21S2 Molecular weight: 1143.4 g/mol [M-H]- : m/z 1141.4717 [M-2H]2- : m/z 570.2322 Yessotoxin (sodium salt form) Molecular formula: C55H80O21S2Na2 Molecular weight: 1187.3 g/mol Period of validity: 1 year from date of sale Storage conditions: -12 °C or below Biotoxin CRMs CRM-YTX-c 2/8 Intended Use CRM-YTX-c is a certified calibration solution designed for analytical method development and accurate quantitation of YTX. The concentration of CRM-YTX-c makes it suitable for preparing a dilution series for calibration of liquid chromatography (LC) and liquid chromatography-mass spectrometry (LC-MS) instrumentation, as well as for spiking shellfish control samples for recovery experiments. Instructions for Storage and Use To ensure the stability of CRM-YTX-c, ampoules should be stored at -12 °C or below. -
Effects of Marine Harmful Algal Blooms on Bivalve Cellular Immunity and Infectious Diseases: a Review
Effects of marine Harmful Algal Blooms on bivalve cellular immunity and infectious diseases: a review Malwenn Lassudrie, Helene Hegaret, Gary Wikfors, Patricia Mirella da Silva To cite this version: Malwenn Lassudrie, Helene Hegaret, Gary Wikfors, Patricia Mirella da Silva. Effects of marine Harm- ful Algal Blooms on bivalve cellular immunity and infectious diseases: a review. Developmental and Comparative Immunology, Elsevier, 2020, 108, pp.103660. 10.1016/j.dci.2020.103660. hal-02880026 HAL Id: hal-02880026 https://hal.archives-ouvertes.fr/hal-02880026 Submitted on 24 Jun 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Effects of marine Harmful Algal Blooms on bivalve cellular immunity and infectious diseases: a review Malwenn Lassudrie1, Hélène Hégaret2, Gary H. Wikfors3, Patricia Mirella da Silva4 1 Ifremer, LER-BO, F- 29900 Concarneau, France. 2 CNRS, Univ Brest, IRD, Ifremer, LEMAR, F-29280, Plouzané, France. 3 NOAA Fisheries Service, Northeast Fisheries Science Center, Milford, CT 0640 USA. 4 Laboratory of Immunology and Pathology of Invertebrates, Department of Molecular Biology, Federal University of Paraíba (UFPB), Paraíba, Brazil. Abstract Bivalves were long thought to be “symptomless carriers” of marine microalgal toxins to human seafood consumers. -
Combined Oral Toxicity of Azaspiracid-1 and Yessotoxin in Female NMRI Mice
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Marine Institute Open Access Repository (OAR) Combined oral toxicity of azaspiracid-1 and yessotoxin in female NMRI mice John A. B. Aasen*1, Arild Espenes2, Christopher O. Miles3,4, Ingunn A. Samdal3, Philipp Hess5,6, Tore Aune1 1Norwegian School of Veterinary Science, Department of Food Safety and Infection Biology, P.O. Box 8146 Dep., 0033 Oslo, Norway. 2Norwegian School of Veterinary Science, Department of Basic Sciences and Aquatic Medicine, P.O. Box 8146 Dep., 0033 Oslo, Norway. 3Norwegian Veterinary Institute, P.O. Box 750 Sentrum, NO-0106 Oslo, Norway. 4AgResearch Ltd, Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand. 5Marine Institute, Renville, Oranmore, Co. Galway, Ireland. 6 IFREMER, Department of Environment, Microbiology & Phycotoxins, Rue de l’Île d’Yeu, 44311 Nantes Cedex 03, France. 1 Abstract For many years, the presence of yessotoxins (YTXs) in shellfish has contributed to the outcome of the traditional mouse bioassay and has on many occasions caused closure of shellfisheries. Since YTXs do not appear to cause diarrhoea in man and exert low oral toxicity in animal experiments, it has been suggested that they should be removed from regulation. Before doing so, it is important to determine whether the oral toxicity of YTXs is enhanced when present together with shellfish toxins known to cause damage to the gastrointestinal tract. Consequently, mice were given high doses of YTX, at 1 or 5 mg/kg body weight, either alone or together with azaspiracid-1 (AZA1) at 200 µg/kg. -
Protist Phylogeny and the High-Level Classification of Protozoa
Europ. J. Protistol. 39, 338–348 (2003) © Urban & Fischer Verlag http://www.urbanfischer.de/journals/ejp Protist phylogeny and the high-level classification of Protozoa Thomas Cavalier-Smith Department of Zoology, University of Oxford, South Parks Road, Oxford, OX1 3PS, UK; E-mail: [email protected] Received 1 September 2003; 29 September 2003. Accepted: 29 September 2003 Protist large-scale phylogeny is briefly reviewed and a revised higher classification of the kingdom Pro- tozoa into 11 phyla presented. Complementary gene fusions reveal a fundamental bifurcation among eu- karyotes between two major clades: the ancestrally uniciliate (often unicentriolar) unikonts and the an- cestrally biciliate bikonts, which undergo ciliary transformation by converting a younger anterior cilium into a dissimilar older posterior cilium. Unikonts comprise the ancestrally unikont protozoan phylum Amoebozoa and the opisthokonts (kingdom Animalia, phylum Choanozoa, their sisters or ancestors; and kingdom Fungi). They share a derived triple-gene fusion, absent from bikonts. Bikonts contrastingly share a derived gene fusion between dihydrofolate reductase and thymidylate synthase and include plants and all other protists, comprising the protozoan infrakingdoms Rhizaria [phyla Cercozoa and Re- taria (Radiozoa, Foraminifera)] and Excavata (phyla Loukozoa, Metamonada, Euglenozoa, Percolozoa), plus the kingdom Plantae [Viridaeplantae, Rhodophyta (sisters); Glaucophyta], the chromalveolate clade, and the protozoan phylum Apusozoa (Thecomonadea, Diphylleida). Chromalveolates comprise kingdom Chromista (Cryptista, Heterokonta, Haptophyta) and the protozoan infrakingdom Alveolata [phyla Cilio- phora and Miozoa (= Protalveolata, Dinozoa, Apicomplexa)], which diverged from a common ancestor that enslaved a red alga and evolved novel plastid protein-targeting machinery via the host rough ER and the enslaved algal plasma membrane (periplastid membrane). -
Book of Abstracts
PICES Seventeenth Annual Meeting Beyond observations to achieving understanding and forecasting in a changing North Pacific: Forward to the FUTURE North Pacific Marine Science Organization October 24 – November 2, 2008 Dalian, People’s Republic of China Contents Notes for Guidance ...................................................................................................................................... v Floor Plan for the Kempinski Hotel......................................................................................................... vi Keynote Lecture.........................................................................................................................................vii Schedules and Abstracts S1 Science Board Symposium Beyond observations to achieving understanding and forecasting in a changing North Pacific: Forward to the FUTURE......................................................................................................................... 1 S2 MONITOR/TCODE/BIO Topic Session Linking biology, chemistry, and physics in our observational systems – Present status and FUTURE needs .............................................................................................................................. 15 S3 MEQ Topic Session Species succession and long-term data set analysis pertaining to harmful algal blooms...................... 33 S4 FIS Topic Session Institutions and ecosystem-based approaches for sustainable fisheries under fluctuating marine resources .............................................................................................................................................. -
Report on Analysis of Shellfish Samples for the Presence of Yessotoxins (YTX)
Report on Analysis of Shellfish Samples for the Presence of Yessotoxins (YTX) Marine Institute February 2001 Report on Analysis of Shellfish Samples for the Presence of Yessotoxins (YTX) Marine Institute February 2001 - ) 0 C> <./-11 ' {~ b~ IJ\llwt~ o~ w_ <b 9? lt-1112-'D ~,{r\l lflL(fo\ OO L/-lf2'bq O 52-S:TS 4 "------ . --- marine Institute Foras na Mara To: Minister of State Hugh Byrne T.D. Molluscan Shellfish Safety Committee S. White, Department of the Marine and Natural Resources 31/01/01 Re: Analysis of shellfish samples for the presence of Yessotoxins and other marine biotoxins I. Sample Tests. In order to determine the cause of the positive mouse bioassay results obtained in mussel samples from several shellfish production areas (including Bantry Bay, Kenmare Bay, Cromane and Lough Foyle), samples were sent in December 2000 and January 2001 for analysis to the laboratories listed below. • EU Reference Laboratory on Marine Biotoxins, Vigo, Spain • UK Reference Laboratory on Marine Biotoxins, Aberdeen, Scotland • Italian Reference Laboratory on Marine Biotoxins, Cessnatico, Italy • Japan Food Research Laboratories, Tokyo, Japan • ESR, Porirua, New Zealand. The following analyses were carried out: • DSP Mouse Bioassay - EU Reference Laboratory, Italian Reference Laboratory • Okadaic acid, DTXs - EU Reference Laboratory and UK Reference Laboratory • Azaspiracid - UK Reference Laboratory • ASP toxins (Domoic acid) - EU Reference Laboratory • Y essotoxins - EU Reference Laboratory, Italian Reference Laboratory and Japan Food Research Laboratories II. Results: Positive mouse bioassay results were obtained, using the Yasumoto (1978) assay, in the EU Reference Laboratory and using the Yasumoto (l 984) assay in the Italian Reference Laboratory. -
Lc Qqq Marine Biotoxins
LC QQQ MARINE BIOTOXINS Dr. Jerry Zweigenbaum Agilent Technologies Agilent Americas Food Group Breaking News...... Recently, legislation in the EU introduced liquid chromatography coupled to tandem mass spectrometry (LC-MS-MS) as the soon to be, reference method for the detection of lipophilic marine biotoxins in live bivalve molluscs, tunicates and echinoderms. Annex 1, SCoFCAH, 18-11-2010, SANCO/6831/2009 rev 7 amending EU Regulation 2074/2005. This change in legislation allows for significant developments in the area of mass spectrometric detection for phycotoxins. Marine Biotoxins: Why analyse for them? Marine biotoxin related illness can range from headaches, vomiting and diarrhoea to neurological problems, and in extreme cases can lead to death. Is it really an issue? Agilent FC 24 Website RASFF Alert notifications are sent when a food or feed presenting a serious health risk is on the market and when rapid action is required. The RASFF member that identifies the problem and takes the relevant actions (e.g. withdrawal of the product) triggers the alert and allows other countries to search there own outlets. Responsibilities for Producers of shell fish They must ensure their product must not contain marine biotoxins in quantities that exceed.... •800 micrograms per kilogram for paralytic shellfish poison (PSP), • 20 milligrams of domoic acid per kilogram for amnesic shellfish poison (ASP) •160 micrograms of okadaic acid equivalents per kilogram for okadaic acid, dinophysistoxins and pectenotoxins in combination, •1 milligram of yessotoxin equivalents per kilogram for yessotoxins, •160 micrograms of azaspiracid equivalents per kilogram for azaspiracids. The picture beforeSite Closuresharvesting 2005 – Ireland (locality) Assessment of Irish beds in 2005 Yellow: ASP Red: DSP Blue: AZP Green: DSP+AZP Courtesy of Dr. -
Catalogue of Protozoan Parasites Recorded in Australia Peter J. O
1 CATALOGUE OF PROTOZOAN PARASITES RECORDED IN AUSTRALIA PETER J. O’DONOGHUE & ROBERT D. ADLARD O’Donoghue, P.J. & Adlard, R.D. 2000 02 29: Catalogue of protozoan parasites recorded in Australia. Memoirs of the Queensland Museum 45(1):1-164. Brisbane. ISSN 0079-8835. Published reports of protozoan species from Australian animals have been compiled into a host- parasite checklist, a parasite-host checklist and a cross-referenced bibliography. Protozoa listed include parasites, commensals and symbionts but free-living species have been excluded. Over 590 protozoan species are listed including amoebae, flagellates, ciliates and ‘sporozoa’ (the latter comprising apicomplexans, microsporans, myxozoans, haplosporidians and paramyxeans). Organisms are recorded in association with some 520 hosts including mammals, marsupials, birds, reptiles, amphibians, fish and invertebrates. Information has been abstracted from over 1,270 scientific publications predating 1999 and all records include taxonomic authorities, synonyms, common names, sites of infection within hosts and geographic locations. Protozoa, parasite checklist, host checklist, bibliography, Australia. Peter J. O’Donoghue, Department of Microbiology and Parasitology, The University of Queensland, St Lucia 4072, Australia; Robert D. Adlard, Protozoa Section, Queensland Museum, PO Box 3300, South Brisbane 4101, Australia; 31 January 2000. CONTENTS the literature for reports relevant to contemporary studies. Such problems could be avoided if all previous HOST-PARASITE CHECKLIST 5 records were consolidated into a single database. Most Mammals 5 researchers currently avail themselves of various Reptiles 21 electronic database and abstracting services but none Amphibians 26 include literature published earlier than 1985 and not all Birds 34 journal titles are covered in their databases. Fish 44 Invertebrates 54 Several catalogues of parasites in Australian PARASITE-HOST CHECKLIST 63 hosts have previously been published. -
As a Novel Vector of Ciguatera Poisoning: Detection of Pacific Ciguatoxins in Toxic Samples from Nuku Hiva Island (French Polynesia)
toxins Article Tectus niloticus (Tegulidae, Gastropod) as a Novel Vector of Ciguatera Poisoning: Detection of Pacific Ciguatoxins in Toxic Samples from Nuku Hiva Island (French Polynesia) Hélène Taiana Darius 1,*,† ID ,Mélanie Roué 2,† ID , Manoella Sibat 3 ID ,Jérôme Viallon 1, Clémence Mahana iti Gatti 1, Mark W. Vandersea 4, Patricia A. Tester 5, R. Wayne Litaker 4, Zouher Amzil 3 ID , Philipp Hess 3 ID and Mireille Chinain 1 1 Institut Louis Malardé (ILM), Laboratory of Toxic Microalgae—UMR 241-EIO, P.O. Box 30, 98713 Papeete, Tahiti, French Polynesia; [email protected] (J.V.); [email protected] (C.M.i.G.); [email protected] (M.C.) 2 Institut de Recherche pour le Développement (IRD)—UMR 241-EIO, P.O. Box 529, 98713 Papeete, Tahiti, French Polynesia; [email protected] 3 IFREMER, Phycotoxins Laboratory, F-44311 Nantes, France; [email protected] (M.S.); [email protected] (Z.A.); [email protected] (P.H.) 4 National Oceanic and Atmospheric Administration, National Ocean Service, Centers for Coastal Ocean Science, Beaufort Laboratory, Beaufort, NC 28516, USA; [email protected] (M.W.V.); [email protected] (R.W.L.) 5 Ocean Tester, LLC, Beaufort, NC 28516, USA; [email protected] * Correspondence: [email protected]; Tel.: +689-40-416-484 † These authors contributed equally to this work. Received: 25 November 2017; Accepted: 18 December 2017; Published: 21 December 2017 Abstract: Ciguatera fish poisoning (CFP) is a foodborne disease caused by the consumption of seafood (fish and marine invertebrates) contaminated with ciguatoxins (CTXs) produced by dinoflagellates in the genus Gambierdiscus. -
Toxicity and Nutritional Inadequacy of Karenia Brevis: Synergistic Mechanisms Disrupt Top-Down Grazer Control
Vol. 444: 15–30, 2012 MARINE ECOLOGY PROGRESS SERIES Published January 10 doi: 10.3354/meps09401 Mar Ecol Prog Ser OPEN ACCESS Toxicity and nutritional inadequacy of Karenia brevis: synergistic mechanisms disrupt top-down grazer control Rebecca J. Waggett1,2,*, D. Ransom Hardison1, Patricia A. Tester1 1National Ocean Service, National Oceanic and Atmospheric Administration, 101 Pivers Island Road, Beaufort, North Carolina 28516-9722, USA 2Present address: The University of Tampa, 401 W. Kennedy Blvd., Tampa, Florida 33606, USA ABSTRACT: Zooplankton grazers are capable of influencing food-web dynamics by exerting top- down control over phytoplankton prey populations. Certain toxic or unpalatable algal species have evolved mechanisms to disrupt grazer control, thereby facilitating the formation of massive, monospecific blooms. The harmful algal bloom (HAB)-forming dinoflagellate Karenia brevis has been associated with lethal and sublethal effects on zooplankton that may offer both direct and indirect support of bloom formation and maintenance. Reductions in copepod grazing on K. brevis have been attributed to acute physiological incapacitation and nutritional inadequacy. To evalu- ate the potential toxicity or nutritional inadequacy of K. brevis, food removal and egg production experiments were conducted using the copepod Acartia tonsa and K. brevis strains CCMP 2228, Wilson, and SP-1, characterized using liquid chromatography-mass spectrometry (LC-MS) as hav- ing high, low, and no brevetoxin levels, respectively. Variable grazing rates were found in exper- iments involving mixtures of toxic CCMP 2228 and Wilson strains. However, in experiments with toxic CCMP 2228 and non-toxic SP-1 strains, A. tonsa grazed SP-1 at significantly higher rates than the toxic alternative.