DOCSLIB.ORG

Marine Information Network Information on the Species and Habitats Around the Coasts and Sea of the British Isles

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Marine Information Network Information on the Species and Habitats Around the Coasts and Sea of the British Isles MarLIN Marine Information Network Information on the species and habitats around the coasts and sea of the British Isles A hydroid (Obelia dichotoma) MarLIN – Marine Life Information Network Marine Evidence–based Sensitivity Assessment (MarESA) Review Saskiya Richards 2007-08-13 A report from: The Marine Life Information Network, Marine Biological Association of the United Kingdom. Please note. This MarESA report is a dated version of the online review. Please refer to the website for the most up-to-date version [https://www.marlin.ac.uk/species/detail/37]. All terms and the MarESA methodology are outlined on the website (https://www.marlin.ac.uk) This review can be cited as: Richards, S. 2007. Obelia dichotoma A hydroid. In Tyler-Walters H. and Hiscock K. (eds) Marine Life Information Network: Biology and Sensitivity Key Information Reviews, [on-line]. Plymouth: Marine Biological Association of the United Kingdom. DOI https://dx.doi.org/10.17031/marlinsp.37.1 The information (TEXT ONLY) provided by the Marine Life Information Network (MarLIN) is licensed under a Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales License. Note that images and other media featured on this page are each governed by their own terms and conditions and they may or may not be available for reuse. Permissions beyond the scope of this license are available here. Based on a work at www.marlin.ac.uk (page left blank) Date: 2007-08-13 A hydroid (Obelia dichotoma) - Marine Life Information Network See online review for distribution map Obelia dichotoma on side of rock. Distribution data supplied by the Ocean Photographer: Keith Hiscock Biogeographic Information System (OBIS). To Copyright: Scottish Natural Heritage (SNH) interrogate UK data visit the NBN Atlas. Researched by Saskiya Richards Refereed by Admin Authority (Linnaeus, 1758) Other common - Synonyms - names Summary Description Obelia dichotoma is generally a colonial hydroid although occasionally is unbranched and solitary. The colonial form varies from being large, erect and loosely fan-shaped or elongate up to 35 cm in height, to being short and either bushy or unbranched up to 5 cm in height. Fan-shaped colonies have stems with alternate first order branches that are almost the same lengths as the stems themselves and give rise to second order branches which, in turn, bear third order branches. The main stems are slender, initially monosiphonic, but thickening with age to become polysiphonic. The stems and branches have a slight zig-zagged appearance, and are marked at the nodes by three to four annulations. The number of annulations at the nodes increases to up 20 towards the base of the colony. The colour of the stems is usually light brown. The medusoid stage of the hydroid consists of a flat, circular, umbrella-shaped bell that has short marginal tentacles and is 0.25 - 0.6 cm wide. Recorded distribution in Britain and Ireland Found throughout the British Isles and Ireland. Global distribution - Habitat https://www.marlin.ac.uk/habitats/detail/37 3 Date: 2007-08-13 A hydroid (Obelia dichotoma) - Marine Life Information Network Obelia dichotoma is usually found on floats, pilings, rocks, shells and other solid objects. Depth range - Identifying features Fan-shaped colony up to 35 cm in height or bush-like colony or solitary up to 5 cm in height. Up to three orders of branching in fan-shaped colonies. Stems and branches with slight zig-zagged appearance. Nodes of stems and branches marked with three to four annulations. Hydranths bell-shaped with 22-36 tentacles, and encased by hydrotheca. Gonophores elongate, slightly flared with a small aperture and encased by a gonotheca with a short, terminal collar. Pedicels with 3-18 annulations. Stems light brown in colour. Additional information Obelia dichotoma reproduces from mid to late summer by releasing medusae from the gonophores. It has been reported that individual colonies release all of their medusae within a few hours. This species is similar to Obelia bidentata, Obelia longissima and Hartlaubella gelatinosa. Listed by Further information sources Search on: NBN WoRMS https://www.marlin.ac.uk/habitats/detail/37 4 Date: 2007-08-13 A hydroid (Obelia dichotoma) - Marine Life Information Network Bibliography Bouillon, J., Medel, M.D., Pages, F., Gili, J.M., Boero, F. & Gravili, C. 2004. Fauna of the Mediterranean hydrozoa. Barcelona: Institut de Ciencies del Mar. Bruce, J.R., Colman, J.S. & Jones, N.S., 1963. Marine fauna of the Isle of Man. Liverpool: Liverpool University Press. Cornelius, P.F.S., 1990a. European Obelia (Cnidaria, Hydroida): systematics and identification. Journal of Natural History, 24, 535-578. Cornelius, P.F.S., 1995b. North-west European thecate hydroids and their medusae. Part 2. Sertulariidae to Campanulariidae. Shrewsbury: Field Studies Council. [Synopses of the British Fauna no. 50] Costello, M.J., Bouchet, P., Boxshall, G., Emblow, C. & Vanden Berghe, E., 2004. European Register of Marine Species [On-line]. http://www.marbef.org/data/erms.php, Fish, J.D. & Fish, S., 1996. A student's guide to the seashore. Cambridge: Cambridge University Press. Fraser, C.M., 1937. Hydroids of the Pacific Coast of Canada and the United States. Toronto: University of Toronto Press. Fraser, C.M., 1944. Hydroids of the Atlantic coast of North America. Toronto: University of Toronto Press. Hayward, P., Nelson-Smith, T. & Shields, C. 1996. Collins pocket guide. Sea shore of Britain and northern Europe. London: HarperCollins. Hayward, P.J. & Ryland, J.S. (ed.) 1995b. Handbook of the marine fauna of North-West Europe. Oxford: Oxford University Press. Medel, M.D. & Vervoort, W., 2000. Atlantic Haleciidae and Campanulariidae (Hydrozoa, Cnidaria) collected during the CANCAP and Mauritania-II expeditions of the National Museum of Natural History, Leiden, The Netherlands. Zoologische Verhandelingen, 330. Picton, B.E. & Costello, M.J., 1998. BioMar biotope viewer: a guide to marine habitats, fauna and flora of Britain and Ireland. [CD- ROM] Environmental Sciences Unit, Trinity College, Dublin. Datasets Bristol Regional Environmental Records Centre, 2017. BRERC species records recorded over 15 years ago. Occurrence dataset: https://doi.org/10.15468/h1ln5p accessed via GBIF.org on 2018-09-25. Centre for Environmental Data and Recording, 2018. Ulster Museum Marine Surveys of Northern Ireland Coastal Waters. Occurrence dataset https://www.nmni.com/CEDaR/CEDaR-Centre-for-Environmental-Data-and-Recording.aspx accessed via NBNAtlas.org on 2018-09-25. Lancashire Environment Record Network, 2018. LERN Records. Occurrence dataset: https://doi.org/10.15468/esxc9a accessed via GBIF.org on 2018-10-01. Manx Biological Recording Partnership, 2018. Isle of Man historical wildlife records 1990 to 1994. Occurrence dataset:https://doi.org/10.15468/aru16v accessed via GBIF.org on 2018-10-01. NBN (National Biodiversity Network) Atlas. Available from: https://www.nbnatlas.org. OBIS (Ocean Biogeographic Information System), 2019. Global map of species distribution using gridded data. Available from: Ocean Biogeographic Information System. www.iobis.org. Accessed: 2019-03-12 South East Wales Biodiversity Records Centre, 2018. SEWBReC Marine and other Aquatic Invertebrates (South East Wales). Occurrence dataset:https://doi.org/10.15468/zxy1n6 accessed via GBIF.org on 2018-10-02. https://www.marlin.ac.uk/habitats/detail/37 5.
Load more

Recommended publications
  • Hydrozoa of the Eurasian Arctic Seas 397 S
    THE ARCTIC SEAS CI imatology, Oceanography, Geology, and Biology Edited by Yvonne Herman IOm51 VAN NOSTRAND REINHOLD COMPANY ~ -----New York This work relates to Department of the Navy Grant NOOOI4-85- G-0252 issued by the Office of Naval Research. The United States Government has a royalty-free license throughout the world in all copyrightable material contained herein. Copyright © 1989 by Van Nostrand Reinhold Softcover reprint of the hardcover 1st edition 1989 Library of Congress Catalog Card Number 88-33800 ISBN-13 :978-1-4612-8022-4 e-ISBN-13: 978-1-4613-0677-1 DOI: 10.1007/978-1-4613-0677-1 All rights reserved. No part of this work covered by the copyright hereon may be reproduced or used in any form or by any means-graphic, electronic, or mechanical, including photocopying, recording, taping, or information storage and retrieval systems-without written permission of the publisher. Designed by Beehive Production Services Van Nostrand Reinhold 115 Fifth Avenue New York, New York 10003 Van Nostrand Reinhold (International) Limited 11 New Fetter Lane London EC4P 4EE, England Van Nostrand Reinhold 480 La Trobe Street Melbourne, Victoria 3000, Australia Nelson Canada 1120 Birchmount Road Scarborough, Ontario MIK 5G4, Canada 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Library of Congress Cataloging in Publication Data The Arctic Seas. Includes index. 1. Oceanography-Arctic Ocean. 2. Geology-ArctiC Ocean. 1. Herman, Yvonne. GC401.A76 1989 551.46'8 88-33800 ISBN-13: 978-1-4612-8022-4 For Anyu Contents Preface / vii Contributors / ix 1.
    [Show full text]
  • Zoology Diversity of Invertebrates Structure
    ZOOLOGY DIVERSITY OF INVERTEBRATES STRUCTURE OF OBELIA --------------------------------------------------------------------------- Introduction: Obelia is worldwide in distribution in the form of plant and is observed in white or light brown in colour in the form of fur in the seas and oceans. It is usually known as Sea-fur. Its name is derived from the Greek word called ‘obelias’,means loaf baked on a spit. • Phylum: Colenterata • Class: Hydrozoa • Order: Hydroida • Sub-order: Leptomedusae • Genus: Obelia • Species: geniculata As it is having three forms like polyp, medusa and blasto style, it is described as trimorphic hydrozoan. Among many species like O. geniculate, O. longissimi, O. bidentata, O. dichotoma. O. geniculate is the most common example studied. Habit and Habitat of Obelia: It is sedentary, marine colonial form present throughout the world on the surfaces of sea weeds, rocks, wooden piles, molluscan shells etc., in the shallow water up to 80-100 meters depth. It is observed in both sexual forms as hydroid colony and asexual form as medusa. Structure of Hydroid Colony: Hydroid colony of obelia is sensitive, transparent consists of horizontal hydrorhiza and vertical hydrocaulus. Hydrorhiza: Hydrorhiza is horizontal thread like root attached to the substratum. It is hollow tube like and gives of vertical branches called hydrocaulus. The tubular part of hydrorhiza are also called stolons. Hydrocaulus: Hydrocaulus are vertical branches arising from hydrorhiza for a length of 2-3 cms. These are also hollow with short lateral branches alternatively in cymose manner. Each alternate branch bears terminal polyp zooids. OBELIA COLONY Each ultimate branch terminates in nutritive zooids called hydranth and axils of the older polyps consists of reproductive zooids called blastostyles or gonangia, thus obelia colony is dimorphic and when gonangia produces saucer shaped buds as a result of asexual reproduction and develops into sexual zooids called medusae, obelia colony becomes trimorphic colony.
    [Show full text]
  • OREGON ESTUARINE INVERTEBRATES an Illustrated Guide to the Common and Important Invertebrate Animals
    OREGON ESTUARINE INVERTEBRATES An Illustrated Guide to the Common and Important Invertebrate Animals By Paul Rudy, Jr. Lynn Hay Rudy Oregon Institute of Marine Biology University of Oregon Charleston, Oregon 97420 Contract No. 79-111 Project Officer Jay F. Watson U.S. Fish and Wildlife Service 500 N.E. Multnomah Street Portland, Oregon 97232 Performed for National Coastal Ecosystems Team Office of Biological Services Fish and Wildlife Service U.S. Department of Interior Washington, D.C. 20240 Table of Contents Introduction CNIDARIA Hydrozoa Aequorea aequorea ................................................................ 6 Obelia longissima .................................................................. 8 Polyorchis penicillatus 10 Tubularia crocea ................................................................. 12 Anthozoa Anthopleura artemisia ................................. 14 Anthopleura elegantissima .................................................. 16 Haliplanella luciae .................................................................. 18 Nematostella vectensis ......................................................... 20 Metridium senile .................................................................... 22 NEMERTEA Amphiporus imparispinosus ................................................ 24 Carinoma mutabilis ................................................................ 26 Cerebratulus californiensis .................................................. 28 Lineus ruber .........................................................................
    [Show full text]
  • Cnidaria: Hydrozoa) Associated to a Subtropical Sargassum Cymosum (Phaeophyta: Fucales) Bed
    ZOOLOGIA 27 (6): 945–955, December, 2010 doi: 10.1590/S1984-46702010000600016 Seasonal variation of epiphytic hydroids (Cnidaria: Hydrozoa) associated to a subtropical Sargassum cymosum (Phaeophyta: Fucales) bed Amanda Ferreira Cunha1 & Giuliano Buzá Jacobucci2 1 Programa de Pós-Graduação em Zoologia, Instituto de Biociências, Universidade de São Paulo. Rua do Matão, Travessa 14, 101, Cidade Universitária, 05508-900 São Paulo, SP, Brazil. E-mail: [email protected] 2 Instituto de Biologia, Universidade Federal de Uberlândia. Rua Ceará, Campus Umuarama, 38402-400 Uberlândia, MG, Brazil. E-mail: [email protected] ABSTRACT. Hydroids are broadly reported in epiphytic associations from different localities showing marked seasonal cycles. Studies have shown that the factors behind these seasonal differences in hydroid richness and abundance may vary significantly according to the area of study. Seasonal differences in epiphytic hydroid cover and richness were evaluated in a Sargassum cymosum C. Agardh bed from Lázaro beach, at Ubatuba, Brazil. Significant seasonal differences were found in total hydroid cover, but not in species richness. Hydroid cover increased from March (early fall) to February (summer). Most of this pattern was caused by two of the most abundant species: Aglaophenia latecarinata Allman, 1877 and Orthopyxis sargassicola (Nutting, 1915). Hydroid richness seems to be related to S. cymosum size but not directly to its biomass. The seasonal differences in hydroid richness and algal cover are shown to be similar to other works in the study region and in the Mediterranean. Seasonal recruitment of hydroid species larvae may be responsible for their seasonal differences in algal cover, although other factors such as grazing activity of gammarid amphipods on S.
    [Show full text]
  • SPECIAL PUBLICATION 6 the Effects of Marine Debris Caused by the Great Japan Tsunami of 2011
    PICES SPECIAL PUBLICATION 6 The Effects of Marine Debris Caused by the Great Japan Tsunami of 2011 Editors: Cathryn Clarke Murray, Thomas W. Therriault, Hideaki Maki, and Nancy Wallace Authors: Stephen Ambagis, Rebecca Barnard, Alexander Bychkov, Deborah A. Carlton, James T. Carlton, Miguel Castrence, Andrew Chang, John W. Chapman, Anne Chung, Kristine Davidson, Ruth DiMaria, Jonathan B. Geller, Reva Gillman, Jan Hafner, Gayle I. Hansen, Takeaki Hanyuda, Stacey Havard, Hirofumi Hinata, Vanessa Hodes, Atsuhiko Isobe, Shin’ichiro Kako, Masafumi Kamachi, Tomoya Kataoka, Hisatsugu Kato, Hiroshi Kawai, Erica Keppel, Kristen Larson, Lauran Liggan, Sandra Lindstrom, Sherry Lippiatt, Katrina Lohan, Amy MacFadyen, Hideaki Maki, Michelle Marraffini, Nikolai Maximenko, Megan I. McCuller, Amber Meadows, Jessica A. Miller, Kirsten Moy, Cathryn Clarke Murray, Brian Neilson, Jocelyn C. Nelson, Katherine Newcomer, Michio Otani, Gregory M. Ruiz, Danielle Scriven, Brian P. Steves, Thomas W. Therriault, Brianna Tracy, Nancy C. Treneman, Nancy Wallace, and Taichi Yonezawa. Technical Editor: Rosalie Rutka Please cite this publication as: The views expressed in this volume are those of the participating scientists. Contributions were edited for Clarke Murray, C., Therriault, T.W., Maki, H., and Wallace, N. brevity, relevance, language, and style and any errors that [Eds.] 2019. The Effects of Marine Debris Caused by the were introduced were done so inadvertently. Great Japan Tsunami of 2011, PICES Special Publication 6, 278 pp. Published by: Project Designer: North Pacific Marine Science Organization (PICES) Lori Waters, Waters Biomedical Communications c/o Institute of Ocean Sciences Victoria, BC, Canada P.O. Box 6000, Sidney, BC, Canada V8L 4B2 Feedback: www.pices.int Comments on this volume are welcome and can be sent This publication is based on a report submitted to the via email to: [email protected] Ministry of the Environment, Government of Japan, in June 2017.
    [Show full text]
  • CNIDARIA Corals, Medusae, Hydroids, Myxozoans
    FOUR Phylum CNIDARIA corals, medusae, hydroids, myxozoans STEPHEN D. CAIRNS, LISA-ANN GERSHWIN, FRED J. BROOK, PHILIP PUGH, ELLIOT W. Dawson, OscaR OcaÑA V., WILLEM VERvooRT, GARY WILLIAMS, JEANETTE E. Watson, DENNIS M. OPREsko, PETER SCHUCHERT, P. MICHAEL HINE, DENNIS P. GORDON, HAMISH J. CAMPBELL, ANTHONY J. WRIGHT, JUAN A. SÁNCHEZ, DAPHNE G. FAUTIN his ancient phylum of mostly marine organisms is best known for its contribution to geomorphological features, forming thousands of square Tkilometres of coral reefs in warm tropical waters. Their fossil remains contribute to some limestones. Cnidarians are also significant components of the plankton, where large medusae – popularly called jellyfish – and colonial forms like Portuguese man-of-war and stringy siphonophores prey on other organisms including small fish. Some of these species are justly feared by humans for their stings, which in some cases can be fatal. Certainly, most New Zealanders will have encountered cnidarians when rambling along beaches and fossicking in rock pools where sea anemones and diminutive bushy hydroids abound. In New Zealand’s fiords and in deeper water on seamounts, black corals and branching gorgonians can form veritable trees five metres high or more. In contrast, inland inhabitants of continental landmasses who have never, or rarely, seen an ocean or visited a seashore can hardly be impressed with the Cnidaria as a phylum – freshwater cnidarians are relatively few, restricted to tiny hydras, the branching hydroid Cordylophora, and rare medusae. Worldwide, there are about 10,000 described species, with perhaps half as many again undescribed. All cnidarians have nettle cells known as nematocysts (or cnidae – from the Greek, knide, a nettle), extraordinarily complex structures that are effectively invaginated coiled tubes within a cell.
    [Show full text]
  • An Annotated Checklist of the Marine Macroinvertebrates of Alaska David T
    NOAA Professional Paper NMFS 19 An annotated checklist of the marine macroinvertebrates of Alaska David T. Drumm • Katherine P. Maslenikov Robert Van Syoc • James W. Orr • Robert R. Lauth Duane E. Stevenson • Theodore W. Pietsch November 2016 U.S. Department of Commerce NOAA Professional Penny Pritzker Secretary of Commerce National Oceanic Papers NMFS and Atmospheric Administration Kathryn D. Sullivan Scientific Editor* Administrator Richard Langton National Marine National Marine Fisheries Service Fisheries Service Northeast Fisheries Science Center Maine Field Station Eileen Sobeck 17 Godfrey Drive, Suite 1 Assistant Administrator Orono, Maine 04473 for Fisheries Associate Editor Kathryn Dennis National Marine Fisheries Service Office of Science and Technology Economics and Social Analysis Division 1845 Wasp Blvd., Bldg. 178 Honolulu, Hawaii 96818 Managing Editor Shelley Arenas National Marine Fisheries Service Scientific Publications Office 7600 Sand Point Way NE Seattle, Washington 98115 Editorial Committee Ann C. Matarese National Marine Fisheries Service James W. Orr National Marine Fisheries Service The NOAA Professional Paper NMFS (ISSN 1931-4590) series is pub- lished by the Scientific Publications Of- *Bruce Mundy (PIFSC) was Scientific Editor during the fice, National Marine Fisheries Service, scientific editing and preparation of this report. NOAA, 7600 Sand Point Way NE, Seattle, WA 98115. The Secretary of Commerce has The NOAA Professional Paper NMFS series carries peer-reviewed, lengthy original determined that the publication of research reports, taxonomic keys, species synopses, flora and fauna studies, and data- this series is necessary in the transac- intensive reports on investigations in fishery science, engineering, and economics. tion of the public business required by law of this Department.
    [Show full text]
  • Special Bulletin
    A^^;^^ ifm^, %^D*^(^i»i(*t^'^: !;u>^*«*»?.j^g^«^ ^^^' ^f^r&^l ^ Qihuh^"^ f <^i*^M*i ;^p>'*,^' #*^»» S^sik^^M^"^ cemi \% ccc r?< CC C<^<^ C/<" < ( c cc € t €L< C Ccf Vfi c^rcrc ^^crx c r*f rf^ '1-'^ if tf ^' 4<3s ^ * fc< jrt ii% 4 C c?r fr c c ^ Jl "4r' t CC^iL tccr €f((C4fii cTiC .y cv< 5rpiii4 fed «i5*C t?^C <?C< ' tC^^( C(K.:Cfe CfCr € f CWC e <r 41:^ iT V rA € • i ^<* 4»iC<a 41 ^' ^«rTer .'• «^^ 4ii/ r4f jaK4i 11. ^^^< V <«45i:4HlM 'fer^ '. -#' ''< 1 <_^K r 43^y 41 ^ CCVVV r ±f-S «.^/ Yin 4 SMITHSONIAN INSTITUTION. UNITED STATES NATIONAL MUSEUM. SPECIAL BULLETIN. AMEEICAN HTDROIDS FA-RT III. THE CAMPANULAKID^ AND THE BONNEVIELLIDJE, WITH TWENTY-SEVEN PLATES. CHARLES CLEVELAND NUTTING, PROFESSOR OF ZOOLOaY, STATE UNIVERSITY OF IOWA. WASHINGTON: GOVERNMENT PRINTING OPPICE. 1915 BULLETIN OF THE UNITED STATES NATIONAL MUSEUM. Issued April 10, 1915. INTRODUCTORY NOTE. During the 10 years which have elapsed since the publication of Part II of this work, in 1904, a number of new workers have arisen in the field of marine zoology and not a few of these have produced valuable works on the H5^droida and described many new species of Cam- panularidse. It remains true, however, that no one has attempted to give a comprehensive account of American forms, although the west coast of North America has been the recipient of special attention by several able writers, such as Harry Beal Torrey and Charles McLean Fraser.
    [Show full text]
  • Species Composition of the Free Living Multicellular Invertebrate Animals
    Historia naturalis bulgarica, 21: 49-168, 2015 Species composition of the free living multicellular invertebrate animals (Metazoa: Invertebrata) from the Bulgarian sector of the Black Sea and the coastal brackish basins Zdravko Hubenov Abstract: A total of 19 types, 39 classes, 123 orders, 470 families and 1537 species are known from the Bulgarian Black Sea. They include 1054 species (68.6%) of marine and marine-brackish forms and 508 species (33.0%) of freshwater-brackish, freshwater and terrestrial forms, connected with water. Five types (Nematoda, Rotifera, Annelida, Arthropoda and Mollusca) have a high species richness (over 100 species). Of these, the richest in species are Arthropoda (802 species – 52.2%), Annelida (173 species – 11.2%) and Mollusca (152 species – 9.9%). The remaining 14 types include from 1 to 38 species. There are some well-studied regions (over 200 species recorded): first, the vicinity of Varna (601 spe- cies), where investigations continue for more than 100 years. The aquatory of the towns Nesebar, Pomorie, Burgas and Sozopol (220 to 274 species) and the region of Cape Kaliakra (230 species) are well-studied. Of the coastal basins most studied are the lakes Durankulak, Ezerets-Shabla, Beloslav, Varna, Pomorie, Atanasovsko, Burgas, Mandra and the firth of Ropotamo River (up to 100 species known). The vertical distribution has been analyzed for 800 species (75.9%) – marine and marine-brackish forms. The great number of species is found from 0 to 25 m on sand (396 species) and rocky (257 species) bottom. The groups of stenohypo- (52 species – 6.5%), stenoepi- (465 species – 58.1%), meso- (115 species – 14.4%) and eurybathic forms (168 species – 21.0%) are represented.
    [Show full text]
  • Hydroids and Hydromedusae of Southern Chesapeake Bay
    W&M ScholarWorks Reports 1971 Hydroids and hydromedusae of southern Chesapeake Bay Dale Calder Virginia Institute of Marine Science Follow this and additional works at: https://scholarworks.wm.edu/reports Part of the Marine Biology Commons, Oceanography Commons, Terrestrial and Aquatic Ecology Commons, and the Zoology Commons Recommended Citation Calder, D. (1971) Hydroids and hydromedusae of southern Chesapeake Bay. Special papers in marine science; No. 1.. Virginia Institute of Marine Science, William & Mary. http://doi.org/10.21220/V5MS31 This Report is brought to you for free and open access by W&M ScholarWorks. It has been accepted for inclusion in Reports by an authorized administrator of W&M ScholarWorks. For more information, please contact [email protected]. LIST OF TABLES Table Page Data on Moerisia lyonsi medusae ginia ...................... 21 rugosa medusae 37 Comparison of hydroids from Virginia, with colonies from Passamaquoddy Bay, New Brunswick.. .................. Hydroids reported from the Virginia Institute of Marine Science (Virginia Fisheries Laboratory) collection up to 1959 ................................................ Zoogeographical comparisons of the hydroid fauna along the eastern United States ............................... List of hydroids from Chesapeake Bay, with their east coast distribution ...me..................................O 8. List of hydromedusae known from ~hesa~eakeBay and their east coast distribution .................................. LIST OF FIGURES Figure Page 1. Southern Chesapeake Bay and adjacent water^.............^^^^^^^^^^^^^^^^^^^^^^^^ 2. Oral view of Maeotias inexpectata ........e~~~~~e~~~~~~a~~~~~~~~~~~o~~~~~~e 3. rature at Gloucester Point, 1966-1967..........a~e.ee~e~~~~~~~aeaeeeeee~e 4. Salinity at Gloucester Point, 1966-1967..........se0me~BIBIeBIBI.e.BIBIBI.BIBIBIs~e~eeemeea~ LIST OF PLATES Plate Hydroids, Moerisia lyonsi to Cordylophora caspia a a e..a a * a 111 ...................
    [Show full text]
  • Phylum Cnidaria-Radiate Animals
    Phylum Cnidaria-Radiate Animals • Tissue level of organization • 2 Germ layers • Hydrostatic Skeleton • Gastrovascular Cavity- for digestion • Polymorphism • Polyp (sessile) and Medusa (free-living) stages Class Hydrozoa 1. Lifestyle- Both polyp and medusa stages dominant 2. Reproduction- asexual by budding or sexual 3. 10 tentacles 4. Ex: Obelia, Obelia medusae, Hydra, Hydra reproductive stages Class Scyphozoa- True Jellyfish 1. Lifestyle- Solitary- Medusa-stage dominant 2. Ex: Aurelia, Aurelia lifecycle Class Anthozoa 1. Lifestyle- Polyp stage dominant 2. Gastrovascular cavity divided into mesenteries 3. Ex: Mertidium, Metridium dissection Return to original outline Return to phyla outline Class Hydrozoa Hydra C.S L.S 100X W.M Male Female Return to original outline Return to phyla outline Hydra 40X W.M Return to original outline Return to phyla outline Budding 40X Spermary Ovary 40X Return to original outline Return to phyla outline Obelia Obelia Colony 40X Return to original outline Return to phyla outline Medusae 100x Return to original outline Return to phyla outline Class Scyphozoa Aurelia Lifecycle Planula 100x Schyphistoma 100x Strobila 100x Ephrya 40x Return to original outline Return to phyla outline Aurelia Return to original outline Return to phyla outline Class Anthozoa Metridium LS CS Dissection scope Return to original outline Return to phyla outline Metridium Return to original outline Return to phyla outline Phylum Porifera-The Sponges • Multicellular • Cellular level of organization • No division of labor among cells • No body systems, no organs, no mouth/digestive tract • No germ layers • Pores and canal systems Class Calcarea 1. Spicule type- calcium carbonate 2. Canal system- asconoid, leuconoid and syconoid 3.
    [Show full text]
  • Hydrozoa, Cnidaria) in the Collection of the Zoological Museum, University of Tel-Aviv, Israel
    Report on hydroids (Hydrozoa, Cnidaria) in the collection of the Zoological Museum, University of Tel-Aviv, Israel W. Vervoort Vervoort, W. Report on hydroids (Hydrozoa, Cnidaria) in the collection of the Zoological Museum, University of Tel-Aviv, Israel. Zool. Med. Leiden 67 (40), 24.xii.1993:537-565.— ISSN 0024-0672. Key words: Cnidaria; Hydrozoa; Hydroida; eastern Mediterranean fauna; Red Sea hydroid fauna. Twenty-eight hydroid species are recorded from the eastern Mediterranean and the northern part of the Red Sea, all material originating from the collections of the Museum of the Zoological Institute, Tel-Aviv University. The collection also included four species that could only be identified to generic level. Though the majority had previously been recorded from either the Mediterranean or the Red Sea, some constitute the first definite record from Israeli coastal waters. All material has been re- deposited in the Tel-Aviv collection; slides and some duplicate samples are in the collections of the National Museum of Natural History (Nationaal Natuurhistorisch Museum, now also incorporating the Rijksmuseum van Natuurlijke Historie), Leiden, the Netherlands. W. Vervoort, Nationaal Natuurhistorisch Museum, RO. Box 9517, 2300 RA, Leiden, The Netherlands. Introduction The collection of Hydroida reported upon below was sent to me for identification several years ago by Dr Y. Benayahu, Zoological Museum, University of Tel-Aviv; additional specimens have intermittently been received. The collection is of interest because it contains a number of samples from Mediterranean waters off Israel, a region poor in hydroid records, though a report on a smaller collection from the same area and also belonging to the Zoological Museum, Tel-Aviv, was previously published by Picard (1950).
    [Show full text]