Myxobolus Opsaridiumi Sp. Nov. (Cnidaria: Myxosporea) Infecting
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Fish, Various Invertebrates
Zambezi Basin Wetlands Volume II : Chapters 7 - 11 - Contents i Back to links page CONTENTS VOLUME II Technical Reviews Page CHAPTER 7 : FRESHWATER FISHES .............................. 393 7.1 Introduction .................................................................... 393 7.2 The origin and zoogeography of Zambezian fishes ....... 393 7.3 Ichthyological regions of the Zambezi .......................... 404 7.4 Threats to biodiversity ................................................... 416 7.5 Wetlands of special interest .......................................... 432 7.6 Conservation and future directions ............................... 440 7.7 References ..................................................................... 443 TABLE 7.2: The fishes of the Zambezi River system .............. 449 APPENDIX 7.1 : Zambezi Delta Survey .................................. 461 CHAPTER 8 : FRESHWATER MOLLUSCS ................... 487 8.1 Introduction ................................................................. 487 8.2 Literature review ......................................................... 488 8.3 The Zambezi River basin ............................................ 489 8.4 The Molluscan fauna .................................................. 491 8.5 Biogeography ............................................................... 508 8.6 Biomphalaria, Bulinis and Schistosomiasis ................ 515 8.7 Conservation ................................................................ 516 8.8 Further investigations ................................................. -
W IWB E37 African Water 1.Pdf
The mention or omission of specific companies, their products or brand names does not imply any endorsement or judgement by the Food and Agriculture Oganization of the United Nations. The designations employed and the presentation of material in this information product do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations concerning the legal or development status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. ISBN 978-92-5-105631-8 All rights reserved. Reproduction and dissemination of material in this information product for educational or other non-commercial purposes are authorized without any prior written permission from the copyright holders provided the source is fully acknowledged. Reproduction of material in this information product for resale or other commercial purposes is prohibited without written permission of the copyright holders. Applications for such permission should be addressed to: Chief Electronic Publishing Policy and Support Branch. Communication Division FAO, Viale delle Terme di Caracalla, 00153 Rome, Italy or by e-mail to [email protected] © FAO 2007 iii Preparation of this document This study is an update of an earlier project led by the Aquatic Resource Management for Local Community Development Programme (ALCOM) entitled the “Southern African Development Community Water Resource Database” (SADC-WRD). Compared with the earlier study, made for SADC, this one is considerably more refined and sophisticated. Perhaps the most significant advances are the vast amount of spatial data and the provision of simplified and advanced custom-made data management and analytical tool-sets that have been integrated within a single geographic information system (GIS) interface. -
A New Species of Myxidium (Myxosporea: Myxidiidae)
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln John Janovy Publications Papers in the Biological Sciences 6-2006 A New Species of Myxidium (Myxosporea: Myxidiidae), from the Western Chorus Frog, Pseudacris triseriata triseriata, and Blanchard's Cricket Frog, Acris crepitans blanchardi (Hylidae), from Eastern Nebraska: Morphology, Phylogeny, and Critical Comments on Amphibian Myxidium Taxonomy Miloslav Jirků University of Veterinary and Pharmaceutical Sciences, Palackého, [email protected] Matthew G. Bolek Oklahoma State University, [email protected] Christopher M. Whipps Oregon State University John J. Janovy Jr. University of Nebraska - Lincoln, [email protected] Mike L. Kent OrFollowegon this State and Univ additionalersity works at: https://digitalcommons.unl.edu/bioscijanovy Part of the Parasitology Commons See next page for additional authors Jirků, Miloslav; Bolek, Matthew G.; Whipps, Christopher M.; Janovy, John J. Jr.; Kent, Mike L.; and Modrý, David, "A New Species of Myxidium (Myxosporea: Myxidiidae), from the Western Chorus Frog, Pseudacris triseriata triseriata, and Blanchard's Cricket Frog, Acris crepitans blanchardi (Hylidae), from Eastern Nebraska: Morphology, Phylogeny, and Critical Comments on Amphibian Myxidium Taxonomy" (2006). John Janovy Publications. 60. https://digitalcommons.unl.edu/bioscijanovy/60 This Article is brought to you for free and open access by the Papers in the Biological Sciences at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in John Janovy Publications by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Authors Miloslav Jirků, Matthew G. Bolek, Christopher M. Whipps, John J. Janovy Jr., Mike L. Kent, and David Modrý This article is available at DigitalCommons@University of Nebraska - Lincoln: https://digitalcommons.unl.edu/ bioscijanovy/60 J. -
Unesco-Eolss Sample Chapters
FISHERIES AND AQUACULTURE - Myxozoan Biology And Ecology - Dr. Ariadna Sitjà-Bobadilla and Oswaldo Palenzuela MYXOZOAN BIOLOGY AND ECOLOGY Ariadna Sitjà-Bobadilla and Oswaldo Palenzuela Instituto de Acuicultura Torre de la Sal, Consejo Superior de Investigaciones Científicas (IATS-CSIC), Castellón, Spain Keywords: Myxozoa, Myxosporea, Actinosporea, Malacosporea, Metazoa, Parasites, Fish Pathology, Invertebrates, Taxonomy, Phylogeny, Cell Biology, Life Cycle Contents 1. Introduction 2. Phylogeny 3. Morphology and Taxonomy 3.1. Spore Morphology 3.2. Taxonomy 4. Life Cycle 4.1. Life Cycle of Myxosporea 4.2. Life Cycle of Malacosporea 5. Cell Biology and Development 6. Ecological Aspects 6.1. Hosts 6.2. Habitats 6.3. Environmental Cues 7. Pathology 7.1. General Remarks 7.2. Pathogenic Effects of Myxozoans 7.2.1. Effects on Invertebrates 7.2.2. Effects on Fish 7.2.3. Effects on non-fish Vertebrates Acknowledgements Glossary Bibliography Biographical Sketches Summary UNESCO-EOLSS The phylum Myxozoa is a group of microscopic metazoans with an obligate endoparasitic lifestyle.SAMPLE Traditionally regarded CHAPTERS as protists, research findings during the last decades have dramatically changed our knowledge of these organisms, nowadays understood as examples of early metazoan evolution and extreme adaptation to parasitic lifestyles. Two distinct classes of myxozoans, Myxosporea and Malacosporea, are characterized by profound differences in rDNA evolution and well supported by differential biological and developmental features. This notwithstanding, most of the existing Myxosporea subtaxa require revision in the light of molecular phylogeny data. Most known myxozoans exhibit diheteroxenous cycles, alternating between a vertebrate host (mostly fish but also other poikilothermic vertebrates, and exceptionally birds and mammals) and an invertebrate (mainly annelids and bryozoans but possibly other ©Encyclopedia of Life Support Systems (EOLSS) FISHERIES AND AQUACULTURE - Myxozoan Biology And Ecology - Dr. -
Bioluminescence Imaging of Live Infected Salmonids Reveals That the Fin Bases Are the Major Portal of Entry for Novirhabdovirus
JOURNAL OF VIROLOGY, Apr. 2006, p. 3655–3659 Vol. 80, No. 7 0022-538X/06/$08.00ϩ0 doi:10.1128/JVI.80.7.3655–3659.2006 Copyright © 2006, American Society for Microbiology. All Rights Reserved. Bioluminescence Imaging of Live Infected Salmonids Reveals that the Fin Bases Are the Major Portal of Entry for Novirhabdovirus Abdallah Harmache,1 Monique LeBerre,1 Ste´phanie Droineau,1 Marco Giovannini,2 and Michel Bre´mont1* Unite´ de Virologie et Immunologie Mole´culaires, INRA, CRJ Domaine de Vilvert, 78352 Jouy en Josas, France,1 and Inserm U434 Fondation Jean Dausset, CEPH 27 rue Juliette Dodu, 75010 Paris, France2 Received 10 November 2005/Accepted 13 January 2006 Although Novirhabdovirus viruses, like the Infectious hematopietic necrosis virus (IHNV), have been extensively studied, limited knowledge exists on the route of IHNV entry during natural infection. A recombinant IHNV (rIHNV) expressing the Renilla luciferase gene was generated and used to infect trout. A noninvasive bioluminescence assay was developed so that virus replication in live fish could be followed hours after infection. We provide here evidence that the fin bases are the portal of entry into the fish. Confirmation was brought by the use of a nonpathogenic rIHNV, which was shown to persist in fins for 3 weeks postinfection. The Infectious hematopoietic necrosis virus (IHNV) be- Renilla reniformis luciferase reporter gene (20), rIHNVLUC longs to the Novirhabdovirus genus in the Rhabdoviridae (Fig. 1A, middle). A full-length pIHNV cDNA clone (4) was family and is the etiological agent of a serious disease in modified such that an additional expression cassette, con- salmonids, mainly in yearling trout. -
Myxosporea, Myxobolidae), a Parasite of Mugil Platanus Günther, 1880 (Osteichthyes, Mugilidae) from Lagoa Dos Patos, RS, Brazil
Arq. Bras. Med. Vet. Zootec., v.59, n.4, p.895-898, 2007 Myxobolus platanus n. sp. (Myxosporea, Myxobolidae), a parasite of Mugil platanus Günther, 1880 (Osteichthyes, Mugilidae) from Lagoa dos Patos, RS, Brazil [Myxobolus platanus n. sp. (Myxosporea, Myxobolidae), parasita de Mugil platanus Günther, 1880 (Osteichthyes, Mugilidae) da Lagoa dos Patos, RS] J.C. Eiras1, P.C. Abreu2, R. Robaldo2, J. Pereira Júnior2 1Faculdade de Ciências - Universidade do Porto 4099-002 - Porto, Portugal 2Fundação Universidade Federal do Rio Grande - Rio Grande, RS ABSTRACT Myxobolus platanus n. sp. infecting the spleen of Mugil platanus Günther, 1880 (Osteichthyes, Mugilidae) from Lagoa dos Patos, Brazil is described The parasites formed round or slightly oval whitish plasmodia (about 0.05-0.1mm in diameter) on the surface of the organ. The spores were round in frontal view and oval in lateral view, 10.7µm (10-11) long, 10.8µm (10-11) wide and 5µm thick, and presented four sutural marks along the sutural edge. The polar capsules, equal in size, were prominent, surpassing the mid-length of the spore, and were oval with the posterior extremity rounded, and converging with their anteriorly tapered ends. They were 7.7µm (7-8) long and 3.8µm (3.5-4) wide. A small intercapsular appendix was present. The polar filament formed five to six coils obliquely placed to the axis of the polar capsule. No mucous envelope or distinct iodinophilous vacuole were found. Keywords: Myxozoa, Myxosporea, Myxobolus platanus n. sp., Mugil platanus, Lagoa dos Patos, Brazil RESUMO Descreve-se Myxobolus platanus n. sp. infectando o baço de Mugil platanus Günther, 1880 (Osteichthyes, Mugilidae) da Lagoa dos Patos, Brasil. -
Common Diseases of Wild and Cultured Fishes in Alaska
COMMON DISEASES OF WILD AND CULTURED FISHES IN ALASKA Theodore Meyers, Tamara Burton, Collette Bentz and Norman Starkey July 2008 Alaska Department of Fish and Game Fish Pathology Laboratories The Alaska Department of Fish and Game printed this publication at a cost of $12.03 in Anchorage, Alaska, USA. 3 About This Booklet This booklet is a product of the Ichthyophonus Diagnostics, Educational and Outreach Program which was initiated and funded by the Yukon River Panel’s Restoration and Enhancement fund and facilitated by the Yukon River Drainage Fisheries Association in conjunction with the Alaska Department of Fish and Game. The original impetus driving the production of this booklet was from a concern that Yukon River fishers were discarding Canadian-origin Chinook salmon believed to be infected by Ichthyophonus. It was decided to develop an educational program that included the creation of a booklet containing photographs and descriptions of frequently encountered parasites within Yukon River fish. This booklet is to serve as a brief illustrated guide that lists many of the common parasitic, infectious, and noninfectious diseases of wild and cultured fish encountered in Alaska. The content is directed towards lay users, as well as fish culturists at aquaculture facilities and field biologists and is not a comprehensive treatise nor should it be considered a scientific document. Interested users of this guide are directed to the listed fish disease references for additional information. Information contained within this booklet is published from the laboratory records of the Alaska Department of Fish and Game, Fish Pathology Section that has regulatory oversight of finfish health in the State of Alaska. -
Myxozoa: Myxosporea) from Marine Tubificid Oligochaetes, with a Discussion on the Validity of the Tetraspora and the Endocapsa As Actinospores Collective Group Names
Description of new types of sphaeractinomyxon actinospores (Myxozoa: Myxosporea) from marine tubificid oligochaetes, with a discussion on the validity of the tetraspora and the endocapsa as actinospores collective group names Luis F. Rangel • Ricardo Castro • Sónia Rocha • Gábor Cech • Graça Casal • Carlos Azevedo • Csaba Székely • Francisca Cavaleiro • Maria J. Santos L. F. Rangel (✉) • M. J. Santos Laboratory of Animal Pathology, Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, s/n, Edifício FC4, 4169-007 Porto, Portugal e-mail: [email protected] L. F. Rangel (✉) • R. Castro • S. Rocha • G. Casal • C. Azevedo • F. Cavaleiro • M. J. Santos Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal S. Rocha • C. Azevedo Laboratory of Cell Biology, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Rua Jorge Viterbo Ferreira no. 228, 4050-313 Porto, Portugal Gábor Cech • Csaba Székely Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, Hungária krt. 21, 1143 Budapest, Hungary G. Casal Department of Sciences, Institute University of Health Sciences, CESPU, Rua Central da Gandra no. 1317, 4585-116 Gandra, Portugal C. Azevedo Zoology Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia Abstract Ten new types of sphaeractinomyxon actinospores are morphologically and molecularly described from the coelomic cavity of two marine oligochaete hosts, Limnodriloides agnes Hrabě, 1967 and Tubificoides pseudogaster (Dahl, 1960), from Aveiro 1 estuary, Portugal. The smallest sphaeractinomyxon type measured 17 µm (length) × 19 µm (width) × 19 µm (apical diameter), whereas the largest type measured 61 µm × 76 µm × 80 µm. -
The Invertebrate Host of Salmonid Fish Parasites Ceratonova Shasta and Parvicapsula Minibicornis (Cnidaria: Myxozoa), Is a Novel
Zootaxa 4751 (2): 310–320 ISSN 1175-5326 (print edition) https://www.mapress.com/j/zt/ Article ZOOTAXA Copyright © 2020 Magnolia Press ISSN 1175-5334 (online edition) https://doi.org/10.11646/zootaxa.4751.2.6 http://zoobank.org/urn:lsid:zoobank.org:pub:7B8087E5-4F25-45F2-A486-4521943EAB7E The invertebrate host of salmonid fish parasites Ceratonova shasta and Parvicapsula minibicornis (Cnidaria: Myxozoa), is a novel fabriciid annelid, Manayunkia occidentalis sp. nov. (Sabellida: Fabriciidae) STEPHEN D. ATKINSON1,3, JERRI L. BARTHOLOMEW1 & GREG W. ROUSE2 1Department of Microbiology, Oregon State University, Corvallis, OR 97331, USA 2Scripps Institution of Oceanography, University of California, San Diego, CA 92093, USA 3Corresponding author. E-mail: [email protected] Abstract Myxosporea (Cnidaria: Myxozoa) are common fish parasites with complex life cycles that involve annelid hosts. Two economically important salmonid-infecting myxosporeans from rivers of the northwestern United States, Ceratonova shasta (Noble, 1950) and Parvicapsula minibicornis Kent et al., 1997, have life cycles that require a freshwater annelid host, identified previously as Manayunkia speciosa Leidy, 1859. This species was described originally from Pennsylvania, with subsequent records from New Jersey, the Great Lakes and west coast river basins. Despite apparent widespread distributions of both suitable fish hosts and the nominal annelid host, both parasites are restricted to river basins in the northwestern US and have never been recorded from the Great Lakes or the eastern US. In this study, we sampled 94 infected and uninfected annelids from two northwestern US rivers to confirm the identity of the host. We found these new specimens had mitochondrial COI sequences with no more than 4.5% distance from each other, but with at least 11% divergence from M. -
Effects of Freezing, Drying, UV, Chlorine, and Quaternary Ammonium
20:116–125, 2008 Journal of Aquatic Animal Health [Article] � Copyright by the American Fisheries Society 2008 DOI: 10.1577/H07-042.1 Effects of Freezing, Drying, Ultraviolet Irradiation, Chlorine, and Quaternary Ammonium Treatments on the Infectivity of Myxospores of Myxobolus cerebralis for Tubifex tubifex 1 RONALD P. HEDRICK,* TERRY S. MCDOWELL, AND KAVERAMMA MUKKATIRA Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, One Shields Avenue, Davis, California 95616, USA ELIZABETH MACCONNELL U.S. Fish and Wildlife Service, Fish Health Center, 920 Technology Boulevard, Suite G, Bozeman, Montana 59718, USA BRIAN PETRI Trojan Technologies, 3020 Gore Road, London, Ontario N5V 4T7, Canada Abstract.—The effects of freezing, drying, ultraviolet irradiation (UV), chlorine, and a quaternary ammonium compound on the infectivity of the myxospore stage of Myxobolus cerebralis (the causative agent of whirling disease) for Tubifex tubifex were examined in a series of laboratory trials. Freezing at either �208C or �808C for a period of 7 d or 2 months eliminated infectivity as assessed by the absence of production of the actinospore stage (triactinomyxons [TAMs]) from T. tubifex cultures inoculated with treated myxospores over a 4–5-month period. Myxospores retained infectivity when held in well water at 58Cor228C for 7 d and when held at 48Cor10 8C d for 2 months. In contrast, no TAMs were produced from T. tubifex cultures inoculated with myxospores held at 208C for 2 months. Drying of myxospores eliminated any evidence of infectivity for T. tubifex. Doses of UV from 40 to 480 mJ/cm2 were all effective for inactivating myxospores of M. -
Accelerated Deactivation of Myxobolus Cerebralis Myxospores by Susceptible and Non-Susceptible Tubifex Tubifex
Vol. 121: 37–47, 2016 DISEASES OF AQUATIC ORGANISMS Published August 31 doi: 10.3354/dao03025 Dis Aquat Org OPENPEN ACCESSCCESS Accelerated deactivation of Myxobolus cerebralis myxospores by susceptible and non-susceptible Tubifex tubifex R. Barry Nehring1,*, George J. Schisler2, Luciano Chiaramonte3, Annie Horton1, Barbara Poole1 1Colorado Division of Parks and Wildlife, 2300 South Townsend Avenue, Montrose, Colorado 81401, USA 2Colorado Division of Parks and Wildlife, 317 West Prospect Street, Fort Collins, Colorado 80526, USA 3Idaho Department of Fish and Game, 1800 Trout Road, Eagle, Idaho 83616, USA ABSTRACT: In the 1990s, the Tubifex tubifex aquatic oligochaete species complex was parsed into 6 separate lineages differing in susceptibility to Myxobolus cerebralis, the myxozoan parasite that can cause whirling disease (WD). Lineage III T. tubifex oligochaetes are highly susceptible to M. cerebralis infection. Lineage I, IV, V and VI oligochaetes are highly resistant or refractory to infection and may function as biological filters by deactivating M. cerebralis myxospores. We designed a 2-phased laboratory experiment using triactinomyxon (TAM) production as the response variable to test that hypothesis. A separate study conducted concurrently demonstrated that M. cerebralis myxospores held in sand and water at temperatures ≤15°C degrade rapidly, becoming almost completely non-viable after 180 d. Those results provided the baseline to assess deactivation of M. cerebralis myxospores by replicates of mixed lineage (I, III, V and VI) and refractory lineage (V and VI) oligochaetes. TAM production was zero among 7 of 8 Lineage V and Lineage VI T. tubifex oligochaete groups exposed to 12 500 M. cerebralis myxospores for 15, 45, 90 and 135 d. -
WHIRLING DISEASE Other Names: Myxobolus Cerebralis, Black Tail Disease
WHIRLING DISEASE Other names: Myxobolus cerebralis, Black Tail Disease CAUSE Whirling disease is a disease caused by the parasitic myxosporean Myxobolus cerebralis. Myxozoa are microscopic aquatic parasites that belong to the phylum Cnidaria, meaning they are related to jellyfish, box jellyfish, anemones, hydra, and corals. SIGNIFICANCE Myxobolus cerebralis commonly infects salmonid fishes as its final host. These fish are typically of socioeconomic importance due to the large commercial and sport fisheries based on these species, the ancillary businesses supporting these fisheries (e.g. outfitters, guides, tourism, etc.), and the aquaculture businesses that produce salmonids. Whirling disease does not affect all salmonid species, populations, or age classes equally. Young fish are generally more susceptible to the disease and it can potentially cause up to 90% mortality in these fish. The first case of whirling disease was identified in Canada by CWHC-BC when Parks Canada employees submitted brook trout exhibiting symptoms of the disease that had been collected from Johnson Lake in Banff National Park, Alberta. The disease has since been confirmed in the Bow, Oldman, and Red Deer river watersheds. TRANSMISSION Whirling disease follows a complex life cycle requiring multiple hosts to complete. Spores of Myxobolus reside in the aquatic substrate where they are ingested by and infect the digestive tract of aquaticTubifex worms. These spores develop into sporocysts within the worms. Each sporocyst produces eight Triactinomyxons (TAMs) that are then shed from the worms into surrounding waters. TAMs are the free swimming stage of the parasite, which attach to the skin or gills of a fish then infect the fish with the smaller sporoplasm stage of their life cycle.