DOCSLIB.ORG

Evolutionary Divergence of Anguillicola Crassus, an Invasive Parasitic Swim Bladder Nematode of Eels of the Genus Anguilla

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Evolutionary Divergence of Anguillicola Crassus, an Invasive Parasitic Swim Bladder Nematode of Eels of the Genus Anguilla Evolutionary divergence of Anguillicola crassus, an invasive parasitic swim bladder nematode of eels of the genus Anguilla Zur Erlangung des akademischen Grades eines DOKTORS DER NATURWISSENSCHAFTEN (Dr. rer. nat.) Fakultät für Chemie und Biowissenschaften Karlsruher Institut für Technologie (KIT) – Universitätsbereich genehmigte DISSERTATION von Dipl. Biol. Urszula Weclawski aus Olsztyn/Polen Dekan: Prof. Dr. Stefan Bräse Referent: Prof. Dr. H. Taraschewski Korreferent: Prof. Dr. Bernd Sures Tag der mündlichen Prüfung: 10.02.2012 I dedicate this work to my son – Without you I wouldn´t be as I am. Contents Contents: Contents:..................................................................................................................................... 5 Abstract ....................................................................................................................................... 8 Zusammenfassung ................................................................................................................... 11 1 Introduction ........................................................................................................................ 13 1.1 Biological invasion ..................................................................................................... 13 1.2 Anguillicola crassus (Kuwahara, Niimi and Hagaki 1974) ........................................ 15 1.2.1 Taxonomy ........................................................................................................... 15 1.2.2 Geographical distribution .................................................................................... 16 1.2.3 The developmental cycle .................................................................................... 21 1.2.3.1 The final hosts ............................................................................................. 24 1.2.3.2 The intermediate hosts ................................................................................ 27 1.2.3.3 Paratenesis .................................................................................................. 28 1.2.4 Morphology ......................................................................................................... 29 1.2.5 Genetic aspects .................................................................................................. 30 1.2.6 Impact of Anguillicola crassus on the final hosts ............................................... 31 1.2.6.1 Pathology ..................................................................................................... 31 1.2.6.2 Immunology ................................................................................................. 33 1.3 Thesis goals ............................................................................................................... 35 2 Materials and methods ...................................................................................................... 37 2.1 Experimental design .................................................................................................. 37 2.2 Collection of L2 larvae and infection of the intermediate host .................................. 37 2.3 Experimental conditions............................................................................................. 39 2.4 Infection and investigation of eels ............................................................................. 40 2.5 Recovery, developmental dynamics and reproductive potential .............................. 42 2.5.1 Statistics.............................................................................................................. 42 2.5.1.1 Descriptive statistics and non-parametric Mann-Whitney U- tests............ 42 2.5.1.2 Fixed-effects linear models ......................................................................... 43 2.6 Investigations for morphology.................................................................................... 47 2.6.1 Measurements .................................................................................................... 47 2.6.2 Statistics.............................................................................................................. 48 5 Contents 2.6.2.1 Descriptive statistics .................................................................................... 48 2.6.2.2 Mixed-effects linear models......................................................................... 48 3 Results ............................................................................................................................... 51 3.1 Data from infected eels .............................................................................................. 51 3.2 Recovery, developmental dynamics and reproductive potential of populations of Anguillicola crassus in the European and Japanese eel .............................................. 53 3.2.1 Differences between populations of Anguillicola crassus in the same eel species ................................................................................................................ 53 3.2.1.1 Differences in recovery ................................................................................ 53 3.2.1.1.1 Non-parametric Mann Whitney U-tests.................................................... 55 3.2.1.1.2 Fixed-effects linear models ...................................................................... 56 3.2.1.2 Differences in the developmental dynamics ............................................... 58 3.2.1.2.1 Non-parametric Mann-Whitney U-tests.................................................... 62 3.2.1.2.2 Fixed-effects linear models ...................................................................... 64 3.2.1.3 Differences in reproductive potential ........................................................... 72 3.2.1.3.1 Mann-Whitney U-tests .............................................................................. 73 3.2.1.3.2 Fixed-effects linear models ...................................................................... 74 3.2.2 Host-dependent developmental patterns ........................................................... 76 3.2.3 Other effects: self-regulation and host-dependent regulation of infrapopulation density ................................................................................................................. 77 3.3 Morphology of populations of Anguillicola crassus in the European and Japanese eel.. .................................................................................................................................... 78 3.3.1 Differences in the same eel species................................................................... 79 3.3.1.1 Body ............................................................................................................. 79 3.3.1.1.1 Descriptive statistics ................................................................................. 79 3.3.1.1.2 Mixed-effects linear models ..................................................................... 82 3.3.1.2 Oesophagus................................................................................................. 86 3.3.1.2.1 Descriptive statistics ................................................................................. 86 3.3.1.2.2 Mixed-effects linear models ..................................................................... 90 3.3.1.3 Buccal capsule............................................................................................. 94 3.3.1.3.1 Descriptive statistics ................................................................................. 94 6 Contents 3.3.1.3.2 Mixed-effects linear models ..................................................................... 98 3.3.2 Hos-dependent morphological patterns ............................................................102 3.3.2.1 Body ............................................................................................................102 3.3.2.2 Oesophagus ...............................................................................................102 3.3.2.3 Buccal capsule ...........................................................................................103 3.3.3 Other effects ......................................................................................................104 3.3.3.1 Density- and host-dependent regulation of worm size .............................104 3.3.3.2 General morphological patterns .................................................................104 4 Discussion ........................................................................................................................106 4.1 Divergence in recovery, developmental dynamics and reproductive potential .......106 4.2 Divergence in morphology ........................................................................................111 4.3 Phenotypic plasticity vs. genetic divergence ............................................................117 4.4 Regulation of infrapopulation density and worm size...............................................121 4.4.1 Self-regulation of infrapopulation density ..........................................................122 4.4.2 Host-dependent regulation of infrapopulation density ......................................123 4.4.3 Density-dependent regulation of worm size ......................................................124 4.4.4 Host-dependent regulation of worm size...........................................................125
Load more

Recommended publications
  • A Global Assessment of Parasite Diversity in Galaxiid Fishes
    diversity Article A Global Assessment of Parasite Diversity in Galaxiid Fishes Rachel A. Paterson 1,*, Gustavo P. Viozzi 2, Carlos A. Rauque 2, Verónica R. Flores 2 and Robert Poulin 3 1 The Norwegian Institute for Nature Research, P.O. Box 5685, Torgarden, 7485 Trondheim, Norway 2 Laboratorio de Parasitología, INIBIOMA, CONICET—Universidad Nacional del Comahue, Quintral 1250, San Carlos de Bariloche 8400, Argentina; [email protected] (G.P.V.); [email protected] (C.A.R.); veronicaroxanafl[email protected] (V.R.F.) 3 Department of Zoology, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand; [email protected] * Correspondence: [email protected]; Tel.: +47-481-37-867 Abstract: Free-living species often receive greater conservation attention than the parasites they support, with parasite conservation often being hindered by a lack of parasite biodiversity knowl- edge. This study aimed to determine the current state of knowledge regarding parasites of the Southern Hemisphere freshwater fish family Galaxiidae, in order to identify knowledge gaps to focus future research attention. Specifically, we assessed how galaxiid–parasite knowledge differs among geographic regions in relation to research effort (i.e., number of studies or fish individuals examined, extent of tissue examination, taxonomic resolution), in addition to ecological traits known to influ- ence parasite richness. To date, ~50% of galaxiid species have been examined for parasites, though the majority of studies have focused on single parasite taxa rather than assessing the full diversity of macro- and microparasites. The highest number of parasites were observed from Argentinean galaxiids, and studies in all geographic regions were biased towards the highly abundant and most widely distributed galaxiid species, Galaxias maculatus.
    [Show full text]
  • 1 References Cited in the U.S. Fish and Wildlife Service American Eel
    References Cited1 in the U.S. Fish and Wildlife Service American Eel Biological Species Report and ESA 12-Month Petition Finding Form Docket Number FWS–HQ–ES–2015–0143 August 2015 Aarestrup, K., and coauthors. 2009. Oceanic Spawning Migration of the European eel (Anguilla anguilla). Science 325(5948):1660. Aarestrup, K., and coauthors. 2010. Survival and progression rates of large European silver eel Anguilla anguilla in late freshwater and early marine phases. Aquatic Biology 9(3):263–270. Able, K. W., and M. P. Fahay. 2010. Ecology of Estuarine Fishes, Chapter 17: Anguilla rostrata (Leseur). Pages 139–144. Johns Hopkins University Press. Aieta, A. E., and K. Oliveira. 2009. Distribution, prevalence, and intensity of the swim bladder parasite Anguillicola crassus in New England and eastern Canada. Diseases of Aquatic Organisms 84(3):229–235. Albert, V., B. Jonsson, and L. Bernatchez. 2006. Natural hybrids in Atlantic eels (Anguilla anguilla, A. rostrata): evidence for successful reproduction and fluctuating abundance in space and time. Molecular Ecology 15(7):1903–1916. Als, T. D., and coauthors. 2011. All roads lead to home: panmixia of European eel in the Sargasso Sea. Molecular Ecology 20(7):1333–1346. Amaral, S. V., F. C. Winchell, B. J. McMahon, and D. A. Dixon. 2003. Evaluation of angled bar racks and louvers for guiding silver phase American eels. Pages 367–376 in D.A. Dixon, editor. Biology, management, and protection of catadromous eels. American Fisheries Society Symposium 33. American Rivers. 2013. 63 dams removed to restore rivers in 2012. Press release, 2013. 87 pages. Aoyama, J. 2003. Origin and evolution of the freshwater eels, genus Anguilla.
    [Show full text]
  • The Evolution of Parasitism in Nematoda
    SUPPLEMENT ARTICLE S26 The evolution of parasitism in Nematoda MARK BLAXTER* and GEORGIOS KOUTSOVOULOS Institute of Evolutionary Biology, The University of Edinburgh, Edinburgh EH9 3JT, UK (Received 19 February 2014; revised 16 April 2014; accepted 16 April 2014; first published online 25 June 2014) SUMMARY Nematodes are abundant and diverse, and include many parasitic species. Molecular phylogenetic analyses have shown that parasitism of plants and animals has arisen at least 15 times independently. Extant nematode species also display lifestyles that are proposed to be on the evolutionary trajectory to parasitism. Recent advances have permitted the determination of the genomes and transcriptomes of many nematode species. These new data can be used to further resolve the phylogeny of Nematoda, and identify possible genetic patterns associated with parasitism. Plant-parasitic nematode genomes show evidence of horizontal gene transfer from other members of the rhizosphere, and these genes play important roles in the parasite-host interface. Similar horizontal transfer is not evident in animal parasitic groups. Many nematodes have bacterial symbionts that can be essential for survival. Horizontal transfer from symbionts to the nematode is also common, but its biological importance is unclear. Over 100 nematode species are currently targeted for sequencing, and these data will yield important insights into the biology and evolutionary history of parasitism. It is important that these new technologies are also applied to free-living taxa, so that the pre-parasitic ground state can be inferred, and the novelties associated with parasitism isolated. Key words: Nematoda, nematodes, parasitism, evolution, genome, symbiont, Wolbachia, phylogeny, horizontal gene transfer. THE DIVERSITY OF THE NEMATODA medical and veterinary science.
    [Show full text]
  • A Review of Congrid Eels of the Genus Ariosoma from Taiwan, With
    Zoological Studies 37(1): 7-12 (1998) A Review of Congrid Eels of the Genus Ariosoma from Taiwan, with Description of a New Species Shih-Chieh Shen Department of Zoology, National Taiwan University, Taipei, Taiwan 106, R.O.C. Tel: 886-2-23630231 ext. 2353. Fax: 886-2-23636837. E-mail: [email protected] (Accepted September 10, 1997) Shih-Chieh Shen (1998) A review of congrid eels of the genus Ariosoma from Taiwan, with description of a new species. Zoological Studies 37(1): 7-12. Diagnosis, description, and figures are presented for the 4 Formosan species of Ariosoma which include A. anago (Temminck and Schlegel, 1842), A. anagoides (Bleeker, 1864), A. shiroanago major (Asano, 1958) and a new species A. nancyae. Ariosoma nancyae is distinctive in its combination of a stout body; 157 total vertebrae; 53 preanal lateral-line pores, and 95 pores behind anus to tail; upper end of gill opening at level of 1/4 upper end of pectoral-fin base; black spots on head, and black bands on body, tail, and fins. Key words: Fish taxonomy, Congridae, Fish fauna, New species, Taiwan. The congrid eel genus Ariosoma Swainson, gate; preanal length more than 40% of total; tip of 1838 is not a well-known group of fishes because tail blunt and stiff, caudal fin reduced; dorsal fin of its small size and unusual habitats. It is, how- insertion origin near level of pectoral fin base; pec- ever, one of the most abundant and diverse toral fin well developed; snout rounded, projecting congrid genera in the world.
    [Show full text]
  • Parasite Infection of the Non-Indigenous Round Goby (Neogobius Melanostomus) in the Baltic Sea
    Downloaded from orbit.dtu.dk on: Oct 04, 2021 Parasite infection of the non-indigenous round goby (Neogobius melanostomus) in the Baltic Sea Ojaveer, Henn; Turovski, Aleksei; Nõomaa, Kristiina Published in: Aquatic Invasions Publication date: 2020 Document Version Peer reviewed version Link back to DTU Orbit Citation (APA): Ojaveer, H., Turovski, A., & Nõomaa, K. (2020). Parasite infection of the non-indigenous round goby (Neogobius melanostomus) in the Baltic Sea. Aquatic Invasions, 15(1), 160-176. General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. Users may download and print one copy of any publication from the public portal for the purpose of private study or research. You may not further distribute the material or use it for any profit-making activity or commercial gain You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Aquatic Invasions (2020) Volume 15 Article in press Special Issue: Proceedings of the 10th International Conference on Marine Bioinvasions Guest editors: Amy Fowler, April Blakeslee, Carolyn Tepolt, Alejandro Bortolus, Evangelina Schwindt and Joana Dias CORRECTED PROOF Research Article Parasite infection of the non-indigenous round goby (Neogobius melanostomus) in the Baltic Sea Henn Ojaveer1,2,*, Aleksei Turovski3 and Kristiina Nõomaa4 1University of Tartu, Ringi 35, 80012 Pärnu, Estonia 2National Institute of Aquatic Resources, Technical University of Denmark, Kemitorvet Building 201, 2800 Kgs.
    [Show full text]
  • Updated Checklist of Marine Fishes (Chordata: Craniata) from Portugal and the Proposed Extension of the Portuguese Continental Shelf
    European Journal of Taxonomy 73: 1-73 ISSN 2118-9773 http://dx.doi.org/10.5852/ejt.2014.73 www.europeanjournaloftaxonomy.eu 2014 · Carneiro M. et al. This work is licensed under a Creative Commons Attribution 3.0 License. Monograph urn:lsid:zoobank.org:pub:9A5F217D-8E7B-448A-9CAB-2CCC9CC6F857 Updated checklist of marine fishes (Chordata: Craniata) from Portugal and the proposed extension of the Portuguese continental shelf Miguel CARNEIRO1,5, Rogélia MARTINS2,6, Monica LANDI*,3,7 & Filipe O. COSTA4,8 1,2 DIV-RP (Modelling and Management Fishery Resources Division), Instituto Português do Mar e da Atmosfera, Av. Brasilia 1449-006 Lisboa, Portugal. E-mail: [email protected], [email protected] 3,4 CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal. E-mail: [email protected], [email protected] * corresponding author: [email protected] 5 urn:lsid:zoobank.org:author:90A98A50-327E-4648-9DCE-75709C7A2472 6 urn:lsid:zoobank.org:author:1EB6DE00-9E91-407C-B7C4-34F31F29FD88 7 urn:lsid:zoobank.org:author:6D3AC760-77F2-4CFA-B5C7-665CB07F4CEB 8 urn:lsid:zoobank.org:author:48E53CF3-71C8-403C-BECD-10B20B3C15B4 Abstract. The study of the Portuguese marine ichthyofauna has a long historical tradition, rooted back in the 18th Century. Here we present an annotated checklist of the marine fishes from Portuguese waters, including the area encompassed by the proposed extension of the Portuguese continental shelf and the Economic Exclusive Zone (EEZ). The list is based on historical literature records and taxon occurrence data obtained from natural history collections, together with new revisions and occurrences.
    [Show full text]
  • Redalyc.Congridae Congrios
    Revista de Biología Tropical ISSN: 0034-7744 [email protected] Universidad de Costa Rica Costa Rica Congridae congrios Revista de Biología Tropical, vol. 58, núm. 2, octubre, 2010, pp. 30-31 Universidad de Costa Rica San Pedro de Montes de Oca, Costa Rica Disponible en: http://www.redalyc.org/articulo.oa?id=44921017036 Cómo citar el artículo Número completo Sistema de Información Científica Más información del artículo Red de Revistas Científicas de América Latina, el Caribe, España y Portugal Página de la revista en redalyc.org Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto HETERENCHELYIDAE HETERENCHELYIDAE anguilas de fango mud eels Pythonichthys sanguineus, anguila del fango – Ojo diminuto; Pythonichthys sanguineus, atlantic mud eel – Eye minute; mandíbula inferior proyectándose hacia adelante de la supe- lower jaw projecting beyond upper; pectoral fins and lateral rior; aletas pectorales y línea lateral ausentes; aletas dorsal y line absent; dorsal and anal fins low and confluent with caudal anal bajas y confluentes con la aleta caudal (UCR 220-26). fin. MURAENESOCIDAE MURAENESOCIDAE congrios picudos pike congers Cynoponticus savanna, congrio espantoso – Morro se proyec- Cynoponticus savanna, conehead eel – Snout projects beyond ta hacia delante de la mandíbula inferior; aberturas branquiales lower jaw; large gill openings nearly meet ventrally; lateral grandes casi se juntan ventralmente; línea lateral completa; line complete; dorsal fin origin above pectoral fin; pectoral fin origen
    [Show full text]
  • The Transcriptome of the Invasive Eel Swimbladder Nematode Parasite
    Heitlinger et al. BMC Genomics 2013, 14:87 http://www.biomedcentral.com/1471-2164/14/87 RESEARCH ARTICLE Open Access The transcriptome of the invasive eel swimbladder nematode parasite Anguillicola crassus Emanuel Heitlinger1,2,4*, Stephen Bridgett3, Anna Montazam3, Horst Taraschewski1 and Mark Blaxter2,3 Abstract Background: Anguillicola crassus is an economically and ecologically important parasitic nematode of eels. The native range of A. crassus is in East Asia, where it infects Anguilla japonica, the Japanese eel. A. crassus was introduced into European eels, Anguilla anguilla, 30 years ago. The parasite is more pathogenic in its new host than in its native one, and is thought to threaten the endangered An. anguilla across its range. The molecular bases for the increased pathogenicity of the nematodes in their new hosts is not known. Results: A reference transcriptome was assembled for A. crassus from Roche 454 pyrosequencing data. Raw reads (756,363 total) from nematodes from An. japonica and An. anguilla hosts were filtered for likely host contaminants and ribosomal RNAs. The remaining 353,055 reads were assembled into 11,372 contigs of a high confidence assembly (spanning 6.6 Mb) and an additional 21,153 singletons and contigs of a lower confidence assembly (spanning an additional 6.2 Mb). Roughly 55% of the high confidence assembly contigs were annotated with domain- or protein sequence similarity derived functional information. Sequences conserved only in nematodes, or unique to A. crassus were more likely to have secretory signal peptides. Thousands of high quality single nucleotide polymorphisms were identified, and coding polymorphism was correlated with differential expression between individual nematodes.
    [Show full text]
  • The Phylogenetics of Anguillicolidae (Nematoda: Anguillicolidea), Swimbladder Parasites of Eels
    UC Davis UC Davis Previously Published Works Title The phylogenetics of Anguillicolidae (Nematoda: Anguillicolidea), swimbladder parasites of eels Permalink https://escholarship.org/uc/item/3017p5m4 Journal BMC Evolutionary Biology, 12(1) ISSN 1471-2148 Authors Laetsch, Dominik R Heitlinger, Emanuel G Taraschewski, Horst et al. Publication Date 2012-05-04 DOI http://dx.doi.org/10.1186/1471-2148-12-60 Peer reviewed eScholarship.org Powered by the California Digital Library University of California The phylogenetics of Anguillicolidae (Nematoda: Anguillicoloidea), swimbladder parasites of eels Laetsch et al. Laetsch et al. BMC Evolutionary Biology 2012, 12:60 http://www.biomedcentral.com/1471-2148/12/60 Laetsch et al. BMC Evolutionary Biology 2012, 12:60 http://www.biomedcentral.com/1471-2148/12/60 RESEARCH ARTICLE Open Access The phylogenetics of Anguillicolidae (Nematoda: Anguillicoloidea), swimbladder parasites of eels Dominik R Laetsch1,2*, Emanuel G Heitlinger1,2, Horst Taraschewski1, Steven A Nadler3 and Mark L Blaxter2 Abstract Background: Anguillicolidae Yamaguti, 1935 is a family of parasitic nematode infecting fresh-water eels of the genus Anguilla, comprising five species in the genera Anguillicola and Anguillicoloides. Anguillicoloides crassus is of particular importance, as it has recently spread from its endemic range in the Eastern Pacific to Europe and North America, where it poses a significant threat to new, naïve hosts such as the economic important eel species Anguilla anguilla and Anguilla rostrata. The Anguillicolidae are therefore all potentially invasive taxa, but the relationships of the described species remain unclear. Anguillicolidae is part of Spirurina, a diverse clade made up of only animal parasites, but placement of the family within Spirurina is based on limited data.
    [Show full text]
  • A Checklist of the Parasites of Eels (Anguilla Spp.) (Anguilliformes: Anguillidae) in Japan (1915-2007)
    J. Grad. Sch. Biosp. Sci. Hiroshima Univ. (2007), 46：91～121 REVIEW A Checklist of the Parasites of Eels (Anguilla spp.) (Anguilliformes: Anguillidae) in Japan (1915-2007) 1） 1） 2） Kazuya Nagasawa , Tetsuya Umino and Kouki Mizuno 1）Graduate School of Biosphere Science, Hiroshima University 1-4-4 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8528, Japan 2）Ehime Prefectural Uwajima Fishery High School 1-2-20 Meirin, Uwajima, Ehime 798-0068, Japan Abstract Information on the protistan and metazoan parasites of three species of eels, the Japanese eel Anguilla japonica, the giant mottled eel A. marmorata and the European eel A. anguilla, in Japan is summarized in the Parasite-Host List and Host-Parasite lists, based on the literature published for 93 years between 1915 and 2007. Both A. japonica and A. marmorata are native to Japan, whereas A. anguilla is an introduced species from Europe. The parasites, including 44 named species and those not identified to species level, are listed by higher taxon as follows: Sarcomastigophora (no named species), Ciliophora (6), Microspora (1), Myxozoa (6), Trematoda (7), Monogenea (7), Cestoda (3), Nematoda (7), Acanthocephala (4), Hirudinida (2), and Copepoda (1). For each taxon of parasite, the following information is given: its currently recognized scientific name, any original combination, synonym(s), or other previous identification used for the parasite occurring in eels; habitat (freshwater, brackish, or marine); site(s) of infection within or on the host; known geographical distribution in Japanese waters; and the published source of each locality record. Of the 44 named species of parasites, 43 are from A.
    [Show full text]
  • Compiled Eel Abstracts: American Fisheries Society 2014 Annual Meeting August 18-21, 2014 Quebec City, Quebec, Canada [Compiled/Organized by R
    Compiled Eel Abstracts: American Fisheries Society 2014 Annual Meeting August 18-21, 2014 Quebec City, Quebec, Canada [Compiled/organized by R. Wilson Laney, U.S. Fish and Wildlife Service, Raleigh, NC, USA] International Eel Symposium 2014: Are Eels Climbing Back up the Slippery Slope? Monday, August 18, 2014: 1:30 PM 206B (Centre des congrès de Québec // Québec City Convention Centre) Martin Castonguay, Institut Maurice-Lamontagne, Pêches et Océans Canada, Mont-Joli, QC, Canada David Cairns, Science Branch, Fisheries and Oceans Canada, Charlottetown, PE, Canada Guy Verreault, Ministere du Développement durable, de l'Environnement, de la Faune et des Parcs, Riviere-du-Loup, QC, Canada John Casselman, Dept. of Biology, Queen's University, Kingston, ON, Canada This talk will introduce the symposium. The first part will outline how the Symposium is structured, where to see Symposium posters, the panel, publication plans, etc. This would be followed by a brief outline of eel science and conservation issues, and how the Symposium will address these. I will then present with some level of detail the themes that the symposium will cover. The Introduction would also state the question that will be addressed by the panel discussion, and ask participants to keep this question in mind as they listen to the various talks. In closing, the introductory talk will outline the purpose of the Canada/USA Eel governance session that will be held at the very end of the meeting, after the Symposium panel. Publishing in the eel symposium proceedings - An orientation from the Editor-in- Chief of the ICES Journal of Marine Science Monday, August 18, 2014: 5:00 PM 206B (Centre des congrès de Québec // Québec City Convention Centre) Howard Browman, Marine Ecosystem Acoustics, Institute of Marine Research, Storebø, Norway I will provide symposium participants with a status report on the ICES Journal of Marine science.
    [Show full text]
  • American Eel Biological Species Report
    AMERICAN EEL BIOLOGICAL SPECIES REPORT Supplement to: Endangered and Threatened Wildlife and Plants; 12-Month Petition Finding for the American Eel (Anguilla rostrata) Docket Number FWS-HQ-ES-2015-0143 U.S. Fish and Wildlife Service, Region 5 June 2015 This page blank for two-sided printing ii U.S. Fish and Wildlife Service, Northeast Region AMERICAN EEL BIOLOGICAL SPECIES REPORT Steven L. Shepard U.S. Fish and Wildlife Service, Maine Field Office 17 Godfrey Drive, Suite 2 Orono, Maine 04473-3702 [email protected] For copies of this report, contact: U.S. Fish and Wildlife Service Hadley, MA 01035 http://www.fws.gov/northeast/newsroom/eels.html http://www.regulations.gov This American Eel Biological Species Report has been prepared by the U.S. Fish and Wildlife Service (Service) in support of a Status Review pursuant to the Endangered Species Act, 16 U.S.C. §§ 1531, et seq. This report reviews the best available information, including published literature, reports, unpublished data, and expert opinions. The report addresses current American eel issues in contemporary time frames. The report is not intended to provide definitive statements on the subjects addressed, but rather as a review of the best available information and ongoing investigations. The report includes updates to, and relevant material from, the Service’s 2007 American Eel Status Review. The report was published in January 2015 following peer review. The report was revised to correct typographical and minor factual errors and reissued in June 2015. With thanks to Krishna Gifford, Martin Miller, James McCleave, Alex Haro, Tom Kwak, David Richardson, Andy Dolloff, Kate Taylor, Wilson Laney, Sheila Eyler, Mark Cantrell, Rosemarie Gnam, Caitlin Snyder, AJ Vale, Steve Minkkinen, Matt Schwarz, Sarah LaPorte, Angela Erves, Heather Bell, the ASMFC American Eel Technical Committee, and the USFWS American Eel Working Group.
    [Show full text]