DOCSLIB.ORG

Acanthocephala of the Canadian Arctic Expedition, 1913-1918

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Acanthocephala of the Canadian Arctic Expedition, 1913-1918 618 RecentLiterature. [oct.Auk Van Cleave's "Acanthocephala of the Canadian Arctic Expedi- tion, 1913-1915."•--In his paper Dr. Van Cleave states that so far as he is awarethere are no publishedrecords of the occurrenceof Acantho- cephala in the arctic fauna of Igorth America. "Species describedby some of the early explorershave becomethe objects of much conjecture on the part of present-day investigators. Under the name Sipunculus lendix, Phipps (1774) describedfrom an Eider Duck what is obviouslya speciesof Acanthocephala. Soon afterward, Goeza (1752: 141) called attention to the fact that this speciesof Phipps is in reality an acantho- cephalan. Since that time various investigators have endeavored to determinethe correctdisposition of this specieswithin the group, but all of their attempts appear to be mere guessesostensibly fostered by the desireto distributeall of the speciesnames into groupswhich would at least give the appearanceof a completelyworked out synonymy. "Three speciesof fresh-water fishes, two marine fishes, and one bird constitute the entire list of acanthocephalanhosts recordedby the expe- dition. A new speciesof the genus Filicollis [Filicollis arcticus Van Cleave,type host, King Eider, Somateriaspectabilis (Linnaeus), in intestine,collected at Bernardharbour, Dolphin and Unionstrait, North- westTerritories, June 16, 1916;cotypes deposited in the Victoria Memor- ial Museum, Ottawa, Canada, and in the collectionof the author at Urbana, illinois] from the King Eider standsintermediate between the European and the 1qrorthAmerican speciesof this genus, but in some respectsshows much closerrelationship with the previouslydescribed American species. A comparisonof F. arcticus with other' known membersof the same genusdiscloses some interestingfacts re- garding the geographicaldistribution of the membersof this genus.F. anatisis the commonEuropean representative of Filicollis while F. botulus occurs in the Eiders in the United States. Filicollis arcticus, n. sp., dif- fers in definite manner from both the previously mentioned speciesbut shows a distinctly closer relationship to F. botulus. In F. bo- tulus there are but sixteenlongitudinal rows of hooks (on the proboscis) while for F. arcticus the writer has found t/½enty-two. Both of these American specieslack the sphericalenlargement of the proboscischar- acteristic of the European species. "The King Eider, the host of F. arcticus,though circumpolarin its distribution, evidently doesnot carry the same acanthocephalaninfesta- tion throughout its range. From the West Tajmirland peninsula, yon Linstow (1905: 3). [Helminthen der RussischenPolar-Expedition 1900- 1903. Mem. Acad. Imp. Sc. St. Petersbourge,Serie 8, Class Physico- Math., 18: 1-17] describedEchinorhynchus pupa from this same host •Report of the Canadian Arctic Expedition, 1913-18, Vol. IX: Annelids, Parasitic Worms, Protozoans, etc. part E: ACanthocephala. By H. J. Van- Cleave. Southern Party--1913-16. Ottawa: J. de Labroquerie Tache, Printer to the King's Most Excellent Majesty. 1920. Issued April 7, 1920. pp. 1-11C. Vol. XX.X¾II1920 J] RecentLiterature. 619 species. Unfortunately his descriptionand his figures of this species fail •o give a full enough account of the structure to enable anyone to place it with certainty in any of the genera recognizedin modern tax- onomy of the Acanthoceph•la.... No evidenceis presented,either in his descriptionor in his figure, which would make it seemprobable that his speciesbelongs to the genusFilicollis. Thus on oppositesides of the arctic circle the King Eider apparently is parasitizedby Acantho- cephala representingtwo distinct genera."--R. M. A. Economic Ornithology in Recent Entomological Publications.-- A few recent entomologicalcontributions contain noteworthyreferences to bird enemies;they relate to the followinginsects: Round-headedapple-tree borer (Saperdacandida): Lossesfrom this insect have increasedwith the development of apple growing, and at presentthe speciesis a primary pest throughoutthe region east of the Rocky Mountains. Mr. Fred E. Brooks, author of a comprehensive bulletin• on this borer says: "Probably no other economicinsect of equal importancehas had so few natural enemiesrecorded definitely and spe- cifically as has the round-headedapple-tree borer," and that personally he has never found any evidenceof hymenopterousparasites. However, he goeson to say that: "While the control effect of parasitesand predaciousinsects on this borer is negligible,woodpeckers play an important part in holding it in check. Wherever the writer has collected specimensor made observa- tions in borer-infestedlocalities the work of thesebirds has always been in evidence. Soonafter the borershatch the woodpeckersbegin to find them beneath the thin covering of bark and thereafter the birds drill for them as long as they are in the tree. In severalorchards where counts were made from 50 to 75 per cent of the borershad been destroyedin this way. "During October, 1915, 24 young borerswere collectedand planted in furrows gougedout of the wood beneath loosenedtongues of bark on the trunk of an apple tree. A week later, when the tree was revisited for the purposeof putting a wire screenaround the trunk to protect the bor- ers from birds, woodpeckershad punctured every tongue of bark and removed the borers from beneath. Not one had escaped. In May of the same year, while pupae were being collectedfrom an orchard,a total of 11 pupal cells •vere found and from every one the occupanthad been removedby woodpeckers. In another case21 pupal cellswere found, 19 of which had been openedby woodpeckersand the insectsremoved." (pp. 29-30.) Ribbed pine-borer (Rhagiumlineatum): While not a seriousinsect pest, this speciesmaterially hastensthe death and decay of injured pines. A • Bul. 847, U.S. Dept. Agr. 1920. .
Load more

Recommended publications
  • Review of Acanthocephala (Hemiptera: Heteroptera: Coreidae) of America North of Mexico with a Key to Species
    Zootaxa 2835: 30–40 (2011) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Article ZOOTAXA Copyright © 2011 · Magnolia Press ISSN 1175-5334 (online edition) Review of Acanthocephala (Hemiptera: Heteroptera: Coreidae) of America north of Mexico with a key to species J. E. McPHERSON1, RICHARD J. PACKAUSKAS2, ROBERT W. SITES3, STEVEN J. TAYLOR4, C. SCOTT BUNDY5, JEFFREY D. BRADSHAW6 & PAULA LEVIN MITCHELL7 1Department of Zoology, Southern Illinois University, Carbondale, Illinois 62901, USA. E-mail: [email protected] 2Department of Biological Sciences, Fort Hays State University, Hays, Kansas 67601, USA. E-mail: [email protected] 3Enns Entomology Museum, Division of Plant Sciences, University of Missouri, Columbia, Missouri 65211, USA. E-mail: [email protected] 4Illinois Natural History Survey, University of Illinois at Urbana-Champaign, Illinois 61820, USA. E-mail: [email protected] 5Department of Entomology, Plant Pathology, & Weed Science, New Mexico State University, Las Cruces, New Mexico 88003, USA. E-mail: [email protected] 6Department of Entomology, University of Nebraska-Lincoln, Panhandle Research & Extension Center, Scottsbluff, Nebraska 69361, USA. E-mail: [email protected] 7Department of Biology, Winthrop University, Rock Hill, South Carolina 29733, USA. E-mail: [email protected] Abstract A review of Acanthocephala of America north of Mexico is presented with an updated key to species. A. confraterna is considered a junior synonym of A. terminalis, thus reducing the number of known species in this region from five to four. New state and country records are presented. Key words: Coreidae, Coreinae, Acanthocephalini, Acanthocephala, North America, review, synonymy, key, distribution Introduction The genus Acanthocephala Laporte currently is represented in America north of Mexico by five species: Acan- thocephala (Acanthocephala) declivis (Say), A.
    [Show full text]
  • Platyhelminthes, Nemertea, and "Aschelminthes" - A
    BIOLOGICAL SCIENCE FUNDAMENTALS AND SYSTEMATICS – Vol. III - Platyhelminthes, Nemertea, and "Aschelminthes" - A. Schmidt-Rhaesa PLATYHELMINTHES, NEMERTEA, AND “ASCHELMINTHES” A. Schmidt-Rhaesa University of Bielefeld, Germany Keywords: Platyhelminthes, Nemertea, Gnathifera, Gnathostomulida, Micrognathozoa, Rotifera, Acanthocephala, Cycliophora, Nemathelminthes, Gastrotricha, Nematoda, Nematomorpha, Priapulida, Kinorhyncha, Loricifera Contents 1. Introduction 2. General Morphology 3. Platyhelminthes, the Flatworms 4. Nemertea (Nemertini), the Ribbon Worms 5. “Aschelminthes” 5.1. Gnathifera 5.1.1. Gnathostomulida 5.1.2. Micrognathozoa (Limnognathia maerski) 5.1.3. Rotifera 5.1.4. Acanthocephala 5.1.5. Cycliophora (Symbion pandora) 5.2. Nemathelminthes 5.2.1. Gastrotricha 5.2.2. Nematoda, the Roundworms 5.2.3. Nematomorpha, the Horsehair Worms 5.2.4. Priapulida 5.2.5. Kinorhyncha 5.2.6. Loricifera Acknowledgements Glossary Bibliography Biographical Sketch Summary UNESCO – EOLSS This chapter provides information on several basal bilaterian groups: flatworms, nemerteans, Gnathifera,SAMPLE and Nemathelminthes. CHAPTERS These include species-rich taxa such as Nematoda and Platyhelminthes, and as taxa with few or even only one species, such as Micrognathozoa (Limnognathia maerski) and Cycliophora (Symbion pandora). All Acanthocephala and subgroups of Platyhelminthes and Nematoda, are parasites that often exhibit complex life cycles. Most of the taxa described are marine, but some have also invaded freshwater or the terrestrial environment. “Aschelminthes” are not a natural group, instead, two taxa have been recognized that were earlier summarized under this name. Gnathifera include taxa with a conspicuous jaw apparatus such as Gnathostomulida, Micrognathozoa, and Rotifera. Although they do not possess a jaw apparatus, Acanthocephala also belong to Gnathifera due to their epidermal structure. ©Encyclopedia of Life Support Systems (EOLSS) BIOLOGICAL SCIENCE FUNDAMENTALS AND SYSTEMATICS – Vol.
    [Show full text]
  • Helminth Parasites (Trematoda, Cestoda, Nematoda, Acanthocephala) of Herpetofauna from Southeastern Oklahoma: New Host and Geographic Records
    125 Helminth Parasites (Trematoda, Cestoda, Nematoda, Acanthocephala) of Herpetofauna from Southeastern Oklahoma: New Host and Geographic Records Chris T. McAllister Science and Mathematics Division, Eastern Oklahoma State College, Idabel, OK 74745 Charles R. Bursey Department of Biology, Pennsylvania State University-Shenango, Sharon, PA 16146 Matthew B. Connior Life Sciences, Northwest Arkansas Community College, Bentonville, AR 72712 Abstract: Between May 2013 and September 2015, two amphibian and eight reptilian species/ subspecies were collected from Atoka (n = 1) and McCurtain (n = 31) counties, Oklahoma, and examined for helminth parasites. Twelve helminths, including a monogenean, six digeneans, a cestode, three nematodes and two acanthocephalans was found to be infecting these hosts. We document nine new host and three new distributional records for these helminths. Although we provide new records, additional surveys are needed for some of the 257 species of amphibians and reptiles of the state, particularly those in the western and panhandle regions who remain to be examined for helminths. ©2015 Oklahoma Academy of Science Introduction Methods In the last two decades, several papers from Between May 2013 and September 2015, our laboratories have appeared in the literature 11 Sequoyah slimy salamander (Plethodon that has helped increase our knowledge of sequoyah), nine Blanchard’s cricket frog the helminth parasites of Oklahoma’s diverse (Acris blanchardii), two eastern cooter herpetofauna (McAllister and Bursey 2004, (Pseudemys concinna concinna), two common 2007, 2012; McAllister et al. 1995, 2002, snapping turtle (Chelydra serpentina), two 2005, 2010, 2011, 2013, 2014a, b, c; Bonett Mississippi mud turtle (Kinosternon subrubrum et al. 2011). However, there still remains a hippocrepis), two western cottonmouth lack of information on helminths of some of (Agkistrodon piscivorus leucostoma), one the 257 species of amphibians and reptiles southern black racer (Coluber constrictor of the state (Sievert and Sievert 2011).
    [Show full text]
  • Appendix: Bioinspired Parasite Details
    A p p e n d i x : B i o i n s p i r e d P a r a s i t e Details Internal Parasites: Endoparasites Biological endoparasites live inside a hosts’ body. In farms, biological parasites infect, hurt, and even kill animals, hurting a farming business. This book is look- ing for inspiration from biology to prevent or treat business “disease.” In business, there are many opportunities for inoculation and treatment. Brain Jackers—Acanthocephala— Thorny-Headed Worms Thorny-headed worms are rare in humans, and also cause disease in birds, amphibians, and reptiles. They are called thorny-headed because they use a bio- logical lancet to pierce and hold onto the stomach walls of the host (Wikipedia, 2013). Their lifecycle includes invertebrates, fish, lizards, birds, and mammals. In one stage of their lifecycle, they “brain jack” a small crustacean eaten by ducks. Just as inner-city drivers are subject to “car-jacking,” this parasite actually redi- rects the crustacean’s dominant behavior from staying away from light to actively seeking it—where ducks may be more likely to eat them, and where the parasite reproduces (Wikipedia, 2013). Alaskan Inuit have a zest for raw fish and that contributes to their increased incidence of Acanthocephala infection compared with other groups of people (Roberts & Janovy, 2009, p. 506). Prevention and Treatment for Acanthocephala Endoscopic and X-ray examinations detect Acanthocephala because their eggs are not passed through feces (Mehlhorn, 2008, p. 25). Controlling the spread of rodents, as well as protecting and cooking food prevents infection.
    [Show full text]
  • Smaller Protostome Phyla: Rotifera, Gastrotricha, Nematomorpha & Acanthocephala Bio 1413: General Zoology Lab (Ziser, 2008) [Exercise 10B] Lab Activities: 1
    Smaller Protostome Phyla: Rotifera, Gastrotricha, Nematomorpha & Acanthocephala Bio 1413: General Zoology Lab (Ziser, 2008) [Exercise 10B] Lab Activities: 1. Rotifers (p167) slide: Rotifers, wm • Examine prepared slide of a rotifer and be able to identify the following structures: corona, foot, mastax, digestive tract, reproductive tract • Attempt to locate and to identify living rotifers from the water samples provided • Recognize and identify rotifers on illustrations and be able to identify to Phylum 2. Gastrotrichs (p167) slide: Gastrotrichs, wm • Observe living specimens (if available) and note their appearance and movement • examine prepared slides of a gastrotrich and identify: mouth, pharynx, adhesive gland, scales 3. Nematomorpha (p168) preserved: horsehair worms • examine living and/or preserved horsehair worms as available and be able to recognize them and distinguish them from other “wormlike” phyla 4. Acanthocephala (p168) • examine preserved specimens and slides as available and be able to recognize them and distinguish them from other “wormlike” phyla eg. Macracanthorhynchus preserved: Macracanthorhynchus this animal is parasitic in the intestine of pigs, the larvae develop in beetle grubs which are eaten by pigs to complete its life cycle eg. examine the prepared slide slide: acanthoceophala, wm identify the following: retractable proboscis with hooks, proboscis receptacle, ligament sac Notebook Suggestions: Describe the kinds of movement seen in live rotifers and compare to the movement seen in roundworms; is it similar? Diagram some of the variety of rotifers in samples and illustrations; what characteristics do all share; how do each differ If living gastrotrichs are available, describe how their movement differs from that of rotifers. Can you identify any organs on the gastrotrich Describe the similarities and differences between acanthocephala and nematomorpha make a diagram of the general life cycle of a horsehair worm and an acanthocephalan.
    [Show full text]
  • Chapter 9 in Biology of the Acanthocephala]
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Faculty Publications from the Harold W. Manter Laboratory of Parasitology Parasitology, Harold W. Manter Laboratory of 1985 Epizootiology: [Chapter 9 in Biology of the Acanthocephala] Brent B. Nickol University of Nebraska - Lincoln, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/parasitologyfacpubs Part of the Parasitology Commons Nickol, Brent B., "Epizootiology: [Chapter 9 in Biology of the Acanthocephala]" (1985). Faculty Publications from the Harold W. Manter Laboratory of Parasitology. 505. https://digitalcommons.unl.edu/parasitologyfacpubs/505 This Article is brought to you for free and open access by the Parasitology, Harold W. Manter Laboratory of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Faculty Publications from the Harold W. Manter Laboratory of Parasitology by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Nickol in Biology of the Acanthocephala (ed. by Crompton & Nickol) Copyright 1985, Cambridge University Press. Used by permission. 9 Epizootiology Brent B. Nickol 9.1 Introduction In practice, epizootiology deals with how parasites spread through host populations, how rapidly the spread occurs and whether or not epizootics result. Prevalence, incidence, factors that permit establishment ofinfection, host response to infection, parasite fecundity and methods of transfer are, therefore, aspects of epizootiology. Indeed, most aspects of a parasite could be related in sorne way to epizootiology, but many ofthese topics are best considered in other contexts. General patterns of transmission, adaptations that facilitate transmission, establishment of infection and occurrence of epizootics are discussed in this chapter. When life cycles are unknown, little progress can be made in under­ standing the epizootiological aspects ofany group ofparasites.
    [Show full text]
  • Phylum Onychophora
    Lab exercise 6: Arthropoda General Zoology Laborarory . Matt Nelson phylum onychophora Velvet worms Once considered to represent a transitional form between annelids and arthropods, the Onychophora (velvet worms) are now generally considered to be sister to the Arthropoda, and are included in chordata the clade Panarthropoda. They are no hemichordata longer considered to be closely related to echinodermata the Annelida. Molecular evidence strongly deuterostomia supports the clade Panarthropoda, platyhelminthes indicating that those characteristics which the velvet worms share with segmented rotifera worms (e.g. unjointed limbs and acanthocephala metanephridia) must be plesiomorphies. lophotrochozoa nemertea mollusca Onychophorans share many annelida synapomorphies with arthropods. Like arthropods, velvet worms possess a chitinous bilateria protostomia exoskeleton that necessitates molting. The nemata ecdysozoa also possess a tracheal system similar to that nematomorpha of insects and myriapods. Onychophorans panarthropoda have an open circulatory system with tardigrada hemocoels and a ventral heart. As in arthropoda arthropods, the fluid-filled hemocoel is the onychophora main body cavity. However, unlike the arthropods, the hemocoel of onychophorans is used as a hydrostatic acoela skeleton. Onychophorans feed mostly on small invertebrates such as insects. These prey items are captured using a special “slime” which is secreted from large slime glands inside the body and expelled through two oral papillae on either side of the mouth. This slime is protein based, sticking to the cuticle of insects, but not to the cuticle of the velvet worm itself. Secreted as a liquid, the slime quickly becomes solid when exposed to air. Once a prey item is captured, an onychophoran feeds much like a spider.
    [Show full text]
  • (Acanthocephala). David Joseph Demont Louisiana State University and Agricultural & Mechanical College
    Louisiana State University LSU Digital Commons LSU Historical Dissertations and Theses Graduate School 1978 The Life Cycle and Ecology of Octospiniferoides Chandleri Bullock 1957 (Acanthocephala). David Joseph Demont Louisiana State University and Agricultural & Mechanical College Follow this and additional works at: https://digitalcommons.lsu.edu/gradschool_disstheses Recommended Citation Demont, David Joseph, "The Life Cycle and Ecology of Octospiniferoides Chandleri Bullock 1957 (Acanthocephala)." (1978). LSU Historical Dissertations and Theses. 3276. https://digitalcommons.lsu.edu/gradschool_disstheses/3276 This Dissertation is brought to you for free and open access by the Graduate School at LSU Digital Commons. It has been accepted for inclusion in LSU Historical Dissertations and Theses by an authorized administrator of LSU Digital Commons. For more information, please contact [email protected]. INFORMATION TO USERS This was produced from a copy of a document sent to us for microfilming. While the most advanced technological means to photograph and reproduce this document have been used, the quality is heavily dependent upon the quality of the material submitted. The following explanation of techniques is provided to help you understand markings or notations which may appear on this reproduction. 1.The sign or “target” for pages apparently lacking from the document photographed is “Missing Page(s)” . If it was possible to obtain the missing page(s) or section, they are spliced into the film along with adjacent pages. This may have necessitated cutting through an image and duplicating adjacent pages to assure you of complete continuity. 2. When an image on the film is obliterated with a round black mark it is an indication that the film inspector noticed either blurred copy because of movement during exposure, or duplicate copy.
    [Show full text]
  • First Record of Acanthocephala in Marine Copepods
    OPHELIA46 (3): 217-231 (August1997) FIRST RECORD OF ACANTHOCEPHALA IN MARINE COPEPODS Rony Huysl* & Philippe Bodin2 1 Zoology Department, The Natural History Museum, Cromwell Road, London SW7 5BD, England 2Universite de Bretagne Occidentale, URA CNRS D 1513, 6 avenue Le Gorgeu, 29285 Brest Cedex, France *Author for correspondence ABSTRACT Late cystacanth stages were discovered in the haemocoel of the marine benthic harpacticoid Halectinosoma herdmani (T. & A. Scott, 1896) (Copepoda: Ectinosomatidae) collected off La Rochelle, France. This represents the first record of Acanthocephala infesting marine copepods. On the basis of the hook formula on the proboscis and the spine pattern on the trunk, the para­ sites were identified as juveniles of Acanthogyrus (Acanthosentis) lizae Orecchia, Paggi & RadujkoY­ ic, 1988 (Eoacanthocephala: Gyracanthocephala: Quadrigyridae) which utilizes the golden grey mullet Liza aurata (Risso, 1810) as the definitive host. The literature on acanthocephalans utiliz­ ing copepods as intermediate hosts is reviewed and some morphological details of both the cysta­ canth and host copepod are presented using differential interference contrast and scanning elec­ tron microscopy. Halectinosoma porosum Wells, 1967 from Inhaca Island (Mozambique) is formally transferred to Ectinosoma Boeck, 1865 as E. porosum (Wells, 1967) comb. nov. INTRODUCTION The Acanthocephala is a small but important phylum of endoparasitic hel­ minths. They live as adults in the alimentary tract of both poikilothermic and homeothermic vertebrates and require an arthropod as first intermediate host. The latter is either a crustacean in aquatic species or an insect or isopod (or rarely a myriapod; e.g. Crites 1964, Fahnestock 1985) in terrestrial species. Although relatively few life cycles have been elucidated, they seem to take a similar course in all acanthocephalans studied.
    [Show full text]
  • Rotifers: Excellent Subjects for the Study of Macro- and Microevolutionary Change
    Hydrobiologia (2011) 662:11–18 DOI 10.1007/s10750-010-0515-1 ROTIFERA XII Rotifers: excellent subjects for the study of macro- and microevolutionary change Gregor F. Fussmann Published online: 1 November 2010 Ó Springer Science+Business Media B.V. 2010 Abstract Rotifers, both as individuals and as a nature. These features make them excellent eukaryotic phylogenetic group, are particularly worthwhile sub- model systems for the study of eco-evolutionary jects for the study of evolution. Over the past decade dynamics. molecular and experimental work on rotifers has facilitated major progress in three lines of evolution- Keywords Rotifer phylogeny Á Asexuality Á ary research. First, we continue to reveal the phy- Eco-evolutionary dynamics logentic relationships within the taxon Rotifera and its placement within the tree of life. Second, we have gained a better understanding of how macroevolu- Introduction tionary transitions occur and how evolutionary strat- egies can be maintained over millions of years. In the Rotifers are microscopic invertebrates that occur in case of rotifers, we are challenged to explain the freshwater, brackish water, in moss habitats, and in soil evolution of obligate asexuality (in the bdelloids) as (Wallace et al., 2006). Rotifers are particularly fasci- mode of reproduction and how speciation occurs in nating and suitable objects for the study of evolution the absence of sex. Recent research with bdelloid roti- and, over the past decade, featured prominently in fers has identified novel mechanisms such as horizon- research on both macro- and microevolutionary tal gene transfer and resistance to radiation as factors change. I, here, review the recent developments in potentially affecting macroevolutionary change.
    [Show full text]
  • Acanthocephala) from Sperm Whales (Physeter Macrocephalus) Stranded on Prince Edward Island, Canada
    J. Helminthol. Soc. Wash. 60(2), 1993, pp. 205-210 Bolbosoma capitatum and Bolbosoma sp. (Acanthocephala) from Sperm Whales (Physeter macrocephalus) Stranded on Prince Edward Island, Canada ERIC P. HOBERG,' PIERRE-YVES DAOusx,2 AND SCOTT McBuRNEY2 1 United States Department of Agriculture, Agricultural Research Service, Biosystematic Parasitology Laboratory, BARC East, Building 1180, 10300 Baltimore Avenue, Beltsville, Maryland 20705 and 2 Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, Prince Edward Island, Canada CIA 4P3 ABSTRACT: Specimens of Bolbosoma capitatum (von Linstow, 1880) and Bolbosoma sp. were recovered from 2 male sperm whales (Physeter macrocephalus L.) that died following a mass stranding on Prince Edward Island, Canada. Some aspects of previous descriptions of B. capitatum have been incomplete, particularly with char- acteristics of the hooks of the proboscis being poorly denned. Females of B. capitatum were found to have 16- 18 longitudinal rows of hooks with either 7-8 or 8-9 hooks in each row. The largest hooks with strongly curved blades were apical to median (overall range 69-122 mm long), whereas the basal hooks were spinelike (68-91 /j.m long). The basal hooks had a unique transverse orientation of the roots, an attribute apparently shared only with B. physeteris Gubanov, 1952, among the 14 species of Bolbosoma from cetaceans and pinnipeds. Although Bolbosoma capitatum had apparently been reported from Physeter macrocephalus in the eastern Atlantic Ocean, none of these records could be substantiated. The current report constitutes a new geographic record (Gulf of St. Lawrence, Canada) and the first account of this parasite in sperm whales from North American waters.
    [Show full text]
  • A Survey of the Acanthocephalan Parasites of Fish Species Otsego County, NY
    A survey of the acanthocephalan parasites of fish species Otsego County, NY L.G. Hendricks1 and F.B. Reyda2 Abstract: The survey documents the diversity of the acanthocephalan parasites in the fish species of Otsego Lake, Cooperstown, New York, and of nearby water bodies of the Biological Field Station (SUNY Oneonta), as well as of Canadarago Lake, Richfield Springs, New York. INTRODUCTION Acanthocephala, or thorny-headed worms, are parasites of vertebrates, and are commonly found in species of birds, mammals and fishes (Schmidt and Roberts, 2005). The body of an acanthocephalan consists of a proboscis and a trunk (see Figure 1). The distinguishing feature of acanthocephalans is the proboscis, which is covered with hooks, and can be retracted. The hooked proboscis is used to anchor the worm to the intestinal wall of the vertebrate host. The hooks themselves can damage the host intestine, and can affect overall fish health (Schmidt and Roberts, 2005). In some cases, hooks can actually penetrate through the intestinal wall, leading to perforations, which can be fatal (Schmidt and Roberts, 2005). It is unclear how often this happens in nature. Most of the acanthocephalan trunk consists of reproductive organs. The sexes are separate, and mating takes place in the vertebrate host intestine. Acanthocephalans are considered pseudocoelomates, i.e., their mesoderm does not line their entire body cavity. Acanthocephala lack a digestive tract. Instead, they absorb nutrients directly from the lumen of the host intestine (Schmidt and Roberts, 2005). Absorption occurs across the tegument of the parasite. The life cycle of acanthocephalans typically consists of two hosts.
    [Show full text]