Download or read book An Investigation Into the Prevalence of Alexandrium Derived Toxins in Marine Food Webs written by Rozalind Jewel Jester and published by . This book was released on 2008 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Trophic Interactions and PSP Toxin Transport in Marine Food Chains During Harmful Algal Blooms of the Dinoflagellate Alexandrium Fundyense written by Christian Marie Petitpas and published by . This book was released on 2015 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Harmful algal blooms (HABs) caused by the toxic dinoflagellate Alexandrium fundyense are a recurrent and widespread problem in both coastal and offshore waters of the northeastern United States. A. fundyense produces a suite of potent neurotoxins, collectively known as saxitoxins, that threaten public health with illness called paralytic shellfish poisoning (PSP). The adverse effects of A. fundyense blooms on public health, marine ecosystems, and local economies have focused much attention on defining the factors that determine the abundance and distribution of this toxic dinoflagellate, and also those that characterize toxin movement in marine food webs. PSP toxins can become concentrated in marine consumers through feeding interactions in both benthic and pelagic food webs. Included are bivalves that directly ingest toxic algae through suspension feeding, as well as pelagic consumers such as fish, marine mammals and birds, which accumulate algal toxins through consumption of contaminated prey. Various forms of zooplankton that feed directly upon toxic algae play two pivotal roles in HAB dynamics : (1) zooplankton grazing on harmful algae represents an important loss factor that can influence bloom development and termination and (2) zooplankton provide the first link in moving algal toxins to higher trophic levels in marine food webs. However, the role of zooplankton grazing remains one of the most poorly understood of the biological controls on A. fundyense blooms. This dissertation had two major goals : (1) to further our understanding of and characterize the role of zooplankton grazing as a loss factor in the ecology of A. fundyense blooms, and (2) to elucidate trophic pathways of PSP toxin transfer in marine planktonic food webs by identifying the community of consumers that are toxin vectors. In order to assess the role of zooplankton grazing on net growth rates of natural A. fundyense populations, incubation experiments were conducted on seawater samples during a natural bloom in spring of 2012 within the Nauset Marsh System (NMS) on Cape Cod, Massachusetts. Abundances of both microzooplankton and mesozooplankton grazers were determined in addition to A. fundyense abundances. This study documented net growth rates that were highly variable throughout the bloom. Microzooplankton appeared to exert greater grazing pressure than mesozooplankton. Microzooplankters observed with ingested A. fundyense cells included polychaete larvae, rotifers, tintinnids, and heterotrophic dinoflagellates of the genera Polykrikos and Gymnodinium. This study also highlighted the difficulty in separating the overlapping variability and uncertainties in A. fundyense growth, grazing pressure, germination and encystment even when physical advection minimally impacts the populations. PSP toxin accumulation in the planktonic food web was also examined. During three A. fundyense bloom seasons (2007, 2008, and 2010) the regional A. fundyense bloom in the coastal Gulf of Maine and on Georges Bank was sampled in order to measure PSP toxins in the planktonic food web and identify potential PSP toxin vectors. A fundyense cells and zooplankton were collected by quantitatively pumping seawater from known depths through plankton sieves of various mesh sizes - using half of each sample for toxin analyses and the other half for microscopically counting and identifying A. fundyense and the zooplankton community. Size-fractionated toxin measurements revealed that PSP toxins were widespread throughout all size classes of zooplankton. Diverse assemblages of zooplankton grazers were identified as PSP toxin vectors, including microzooplankton such as tintinnids, heterotrophic dinoflagellates such as Protoperidinium spp., and mesozooplankton grazers such as barnacle nauplii, harpacticoid and calanoid copepods, the marine cladoceran Evadne nordmanni, and hydroids of the genus Clytia. PSP toxin composition in most samples remained fairly consistent during the study, with gonyautoxins (1,2,3, & 4) dominating (>90%) the profile. A fundyense cellular toxin content estimated from field samples was significantly higher in the coastal Gulf of Maine than on Georges Bank, and differences in PSP toxin profiles were also observed - mainly within the composition of the gonyautoxin and carbamate toxin components. This suggests that A. fundyense in the coastal Gulf of Maine and those offshore on Georges Bank are distinct populations.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Pacific Arctic Region written by Jacqueline M. Grebmeier and published by Springer. This book was released on 2014-06-10 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Pacific Arctic region is experiencing rapid sea ice retreat, seawater warming, ocean acidification and biological response. Physical and biogeochemical modeling indicates the potential for step-function changes to the overall marine ecosystem. This synthesis book was coordinated within the Pacific Arctic Group, a network of international partners working in the Pacific Arctic. Chapter topics range from atmospheric and physical sciences to chemical processing and biological response to changing environmental conditions. Physical and biogeochemical modeling results highlight the need for data collection and interdisciplinary modeling activities to track and forecast the changing ecosystem of the Pacific Arctic with climate change.
Download or read book Marine Biotoxins written by Hans P. Egmond and published by Food & Agriculture Org.. This book was released on 2004 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper provides an extensive review of different aspects of five shellfish-poisoning syndromes (paralytic, diarrhoeic, amnesic, neurologic and azapiracid), as well as one fish-poisoning syndrome (ciguatera fish poisoning), and discusses in detail the causative toxins produced by marine organisms, chemical structures and analytical methods of the toxins, habitat and occurrence of the toxin-producing organisms, case studies and existing regulations. Based on this analysis, risk assessments are carried out for each of the toxins, and recommendations are elaborated to improve the management of these risks in order to reduce the harmful effect of these toxins on public health.
Download or read book Harmful Algal Blooms written by Sandra E. Shumway and published by John Wiley & Sons. This book was released on 2018-08-06 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: Harmful Algal Blooms: A Compendium Desk Reference provides basic information on harmful algal blooms (HAB) and references for individuals in need of technical information when faced with unexpected or unknown harmful algal events. Chapters in this volume will provide readers with information on causes of HAB, successful management and monitoring programs, control, prevention, and mitigation strategies, economic consequences of HAB, associated risks to human health, impacts of HAB on food webs and ecosystems, and detailed information on the most common HAB species. Harmful Algal Blooms: A Compendium Desk Reference will be an invaluable resource to managers, newcomers to the field, those who do not have easy or affordable access to scientific literature, and individuals who simply do not know where to begin searching for the information needed, especially when faced with novel and unexpected HAB events. Edited by three of the world's leading harmful algal bloom researchers and with contributions from leading experts, Harmful Algal Blooms: A Compendium Desk Reference will be a key source of information for this increasingly important topic.
Download or read book Clinical Neurotoxicology E Book written by Michael R. Dobbs and published by Elsevier Health Sciences. This book was released on 2009-07-22 with total page 729 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clinical Neurotoxicology offers accurate, relevant, and comprehensive coverage of a field that has grown tremendously in the last 20 years. You’ll get a current symptomatic approach to treating disorders caused by neurotoxic agents, environmental factors—such as heavy metals and pesticides—and more. Apply discussions of cellular and molecular processes and pathology to clinical neurology. Leading authorities and up-and-coming clinical neurotoxicologists present their expertise on wide-ranging, global subjects and debate controversies in the specialty, including Gulf War Syndrome. Provides a complete listing of neurotoxic agents—from manufactured to environmental—so you get comprehensive, clinical coverage. Covers how toxins manifest themselves according to age and co-morbidity so that you can address the needs of all your patients. Offers broad and in-depth coverage of toxins from all over the world through contributions by leading authorities and up-and-coming clinical neurotoxicologists. Features discussion of controversial and unusual topics such as Gulf War Syndrome, Parkinson’s Disease, motor neuron disease, as well as other issues that are still in question.
Download or read book Journal of Shellfish Research written by and published by . This book was released on 2001 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Real time Coastal Observing Systems for Marine Ecosystem Dynamics and Harmful Algal Blooms written by Babin, Marcel and published by UNESCO. This book was released on 2008-06-05 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proliferation of harmful phytoplankton in marine ecosystems can cause massive fish kills, contaminate seafood with toxins, impact local and regional economies and dramatically affect ecological balance. Real-time observations are essential for effective short-term operational forecasting, but observation and modelling systems are still being developed. This volume provides guidance for developing real-time and near real-time sensing systems for observing and predicting plankton dynamics, including harmful algal blooms, in coastal waters. The underlying theory is explained and current trends in research and monitoring are discussed.Topics covered include: coastal ecosystems and dynamics of harmful algal blooms; theory and practical applications of in situ and remotely sensed optical detection of microalgal distributions and composition; theory and practical applications of in situ biological and chemical sensors for targeted species and toxin detection; integrated observing systems and platforms for detection; diagnostic and predictive modelling of ecosystems and harmful algal blooms, including data assimilation techniques; observational needs for the public and government; and future directions for research and operations.
Download or read book Information Resources in Toxicology Volume 1 Background Resources and Tools written by Steve Gilbert and published by Academic Press. This book was released on 2020-05-16 with total page 1055 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new fifth edition of Information Resources in Toxicology offers a consolidated entry portal for the study, research, and practice of toxicology. Both volumes represents a unique, wide-ranging, curated, international, annotated bibliography, and directory of major resources in toxicology and allied fields such as environmental and occupational health, chemical safety, and risk assessment. The editors and authors are among the leaders of the profession sharing their cumulative wisdom in toxicology’s subdisciplines. This edition keeps pace with the digital world in directing and linking readers to relevant websites and other online tools. Due to the increasing size of the hardcopy publication, the current edition has been divided into two volumes to make it easier to handle and consult. Volume 1: Background, Resources, and Tools, arranged in 5 parts, begins with chapters on the science of toxicology, its history, and informatics framework in Part 1. Part 2 continues with chapters organized by more specific subject such as cancer, clinical toxicology, genetic toxicology, etc. The categorization of chapters by resource format, for example, journals and newsletters, technical reports, organizations constitutes Part 3. Part 4 further considers toxicology’s presence via the Internet, databases, and software tools. Among the miscellaneous topics in the concluding Part 5 are laws and regulations, professional education, grants and funding, and patents. Volume 2: The Global Arena offers contributed chapters focusing on the toxicology contributions of over 40 countries, followed by a glossary of toxicological terms and an appendix of popular quotations related to the field. The book, offered in both print and electronic formats, is carefully structured, indexed, and cross-referenced to enable users to easily find answers to their questions or serendipitously locate useful knowledge they were not originally aware they needed. Among the many timely topics receiving increased emphasis are disaster preparedness, nanotechnology, -omics, risk assessment, societal implications such as ethics and the precautionary principle, climate change, and children’s environmental health. Introductory chapters provide a backdrop to the science of toxicology, its history, the origin and status of toxicoinformatics, and starting points for identifying resources Offers an extensive array of chapters organized by subject, each highlighting resources such as journals, databases,organizations, and review articles Includes chapters with an emphasis on format such as government reports, general interest publications, blogs, and audiovisuals Explores recent internet trends, web-based databases, and software tools in a section on the online environment Concludes with a miscellany of special topics such as laws and regulations, chemical hazard communication resources, careers and professional education, K-12 resources, funding, poison control centers, and patents Paired with Volume Two, which focuses on global resources, this set offers the most comprehensive compendium of print, digital, and organizational resources in the toxicological sciences with over 120 chapters contributions by experts and leaders in the field
Download or read book Marine Biotoxins written by Fao and published by Daya Books. This book was released on 2007 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper provides an extensive review of different aspects of five shellfish-poisoning syndromes (paralytic, diarrhoeic, amnesic, neurologic and azapiracid), as well as one fish-poisoning syndrome (ciguatera fish poisoning). It discusses in detail the causative toxins produced by marine organisms, chemical structures and analytical methods, habitat and occurrence of the toxin-producing organisms, case studies and existing regulations. Based on this analysis, risk assessments are carried out for each of the toxins, and recommendations are elaborated to improve the management of these risks in order to reduce the harmful effects of these toxins on public health. Contents Chapter 1: Introduction; Chapter 2: Paralytic Shellfish Poisoning (PSP); Chemical structures and properties, Methods of analysis, Source organism(s) and habitat, Occurrence and accumulation in seafood, Toxicity of PSP toxins, Prevention of PSP intoxication, Cases and outbreaks of PSP, Regulations and monitoring; Chapter 3: Diarrhoeic Shellfish Poisoning (DSP); Chemical structures and properties, Methods of analysis, Source organism(s) and habitat, Occurrence and accumulation in seafood, Toxicity of DSP toxins, Prevention of DSP intoxication, Cases and outbreaks of DSP, Regulations and monitoring; Chapter 4: Amnesic Shellfish Poisoning (ASP); Chemical structures and properties, Methods of analysis, Source organism(s) and habitat, Occurrence and accumulation in seafood, Toxicity of ASP toxins, Prevention of ASP toxins, Prevention of ASP intoxication, Cases and outbreaks of ASP, Regulations and monitoring; Chapter 5: Neurologic Shellfish Poisoning (NSP); Chemical structures and properties, Methods of analysis, Source organism(s) and habitat, Occurrence and accumulation in seafood, Toxicity of NSP toxins, Prevention of NSP intoxication, Cases and outbreaks of NSP, Regulations and monitoring; Chapter 6: Azaspiracid Shellfish Poisoning (AZP); Chemical structures and properties, Methods of analysis, Source organism(s) and habitat, Occurrence and accumulation in seafood, Toxicity of AZP toxins, Prevention of AZP intoxication, Cases and outbreaks of AZP, Regulations and monitoring; Chapter 7: Ciguatera Fish Poisoning (CFP); Chemical structures and properties of ciguatoxins, Methods of analysis, Source organism(s), habitat and distribution, Occurrence and accumulation in seafood, Toxicity of CFP toxins, Prevention of CFP intoxication, Cases and outbreaks of CFP, Regulations and monitoring; Chapter 8: Risk Assessment; Risk assessment for paralytic shellfish poisoning (PS), Risk assessment for diarrhoeic shellfish poisoning (DSP), Risk assessment for Amnesic shellfish poisoning (ASP), Risk assessment for neurologic shellfish poisoning (NSP), Risk assessment for azaspiracid shellfish poisoning (AZP), Risk assessment for ciguatera fish poisoning (CFP); Chapter 9: Conclusions and Recommendations; Conclusions, Recommendations.
Download or read book Veterinary Toxicology for Australia and New Zealand written by Rosalind Dalefield and published by Elsevier. This book was released on 2017-06-23 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Veterinary Toxicology for Australia and New Zealand is a reference suited to the unique challenges of veterinary practice in Australia and New Zealand. Both streamlined and thorough in its coverage of poisons and treatments for those locations, this focused approach allows readers to quickly find relevant information that is presented in a concise and logical manner that is useful to clinicians. The authors draw upon a wealth of knowledge of the particularities of toxicology in Australia and New Zealand to present readers with the up-to-date information required to efficiently and effectively diagnose and treat their patients. Highlights toxins of specific concern in Australia and New Zealand Structures information in a logical way so that it can be located quickly Offers up-to-date information on current and emerging risks
Download or read book The Genus Alexandrium Halim Dinoflagellata written by Enrique Balech and published by . This book was released on 1995 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook on Biological Warfare Preparedness written by S.J.S. Flora and published by Academic Press. This book was released on 2019-10-05 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook on Biological Warfare Preparedness provides detailed information on biological warfare agents and their mode of transmission and spread. In addition, it explains methods of detection and medical countermeasures, including vaccine and post-exposure therapeutics, with specific sections detailing diseases, their transmission, clinical signs and symptoms, diagnosis, treatment, vaccines, prevention and management. This book is useful reading for researchers and advanced students in toxicology, but it will also prove helpful for medical students, civil administration, medical doctors, first responders and security forces. As the highly unpredictable nature of any event involving biological warfare agents has given rise to the need for the rapid development of accurate detection systems, this book is a timely resource on the topic. Introduces different bacterial and viral agents, including Ebola and other emerging threats and toxins Discusses medical countermeasures, including vaccines and post-exposure therapeutics Includes a comprehensive review of current methods of detection
Download or read book Report of the Expert Meeting on Ciguatera Poisoning written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2020-06-01 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phytoplankton blooms, micro-algal blooms, toxic algae, red tides, or harmful algae, are all terms for naturally occurring phenomena that have occurred throughout recorded history. About 300 hundred species of micro algae are reported at times to form mass occurrence, so called blooms. Nearly one fourth of these species are known to produce toxins. Even non-toxic algal blooms can have devastating impacts when they lead to kills of fish and invertebrates by generating anoxic conditions. Some algal species, although non-toxic to humans, can produce exudates that can cause damage to the delicate gill tissues of fish (raphidophytes Chattonella, Heterosigma, and dinoflagellates Karenia, Karlodinium) . Aquatic animals can suffer devastating mortalities, which could lead economical and food losses, and eventually became a food security problem. Of greatest concern to humans are algal species that produce potent neurotoxins that can find their way through shellfish and fish to human consumers where they evoke a variety of gastrointestinal and neurological illnesses (paralytic shellfish poisoning (PSP), amnesic shellfish poisoning (ASP), diarrhoeic shellfish poisoning (DSP), neurotoxic shellfish poisoning (NSP), azaspiracid shellfish poisoning (AZP) and ciguatera fish poisoning (CFP)). Worldwide, ciguatoxins are estimated to cause around 50 000 cases of ciguatera fish poisoning annually; neurological effects may last for weeks or even years and one percent of these cases are fatal . Climate change and costal water over enrichment create an enabling environment for harmful algal blooms, which seem to have become more frequent, more intense and more widespread in the past decades.
Download or read book Marine Mammal Research written by John Elliott Reynolds and published by JHU Press. This book was released on 2005-11-18 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine mammal conservation presents a number of challenges for scientists. This work presents an argument about how science, if conducted properly, can provide insights needed to minimise crisis management and implement more anticipatory action.
Download or read book Marine and Freshwater Toxins written by P. Gopalakrishnakone and published by Springer. This book was released on 2016-03-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, the field of Toxinology has expanded substantially. On the one hand it studies venomous animals, plants and micro organisms in detail to understand their mode of action on targets. While on the other, it explores the biochemical composition, genomics and proteomics of toxins and venoms to understand their three interaction with life forms (especially humans), development of antidotes and exploring their pharmacological potential. Therefore, Toxinology has deep linkages with biochemistry, molecular biology, anatomy and pharmacology. In addition, there is a fast developing applied subfield, clinical toxinology, which deals with understanding and managing medical effects of toxins on human body. Given the huge impact of toxin-based deaths globally, and the potential of venom in generation of drugs for so-far incurable diseases (for example, Diabetes, Chronic Pain), the continued research and growth of the field is imminent. This has led to the growth of research in the area and the consequent scholarly output by way of publications in journals and books. Despite this ever growing body of literature within biomedical sciences, there is still no all-inclusive reference work available that collects all of the important biochemical, biomedical and clinical insights relating to Toxinology. The Handbook of Toxinology aims to address this gap and cover the field of Toxinology comprehensively.
