DOCSLIB.ORG

Prevalences of Parasitized and Hyperparasitized Crabs Near South Georgia

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Prevalences of Parasitized and Hyperparasitized Crabs Near South Georgia MARINE ECOLOGY PROGRESS SERIES hblished September 3 Mar Ecol Prog Ser Prevalences of parasitized and hyperparasitized crabs near South Georgia George Watters* U.S. AMLR Program, NOAA Fisheries, PO Box 271, San Diego, California 92038, USA ABSTRACT: This study identifies sources of variation in the prevalences of parasitized and hyperpara- sitized Paralomis spinosissima, a lithodid found around South Georgia. The parasite is Briarosaccus cal- losus, a rhizocephalan; the hyperparasite is an undescribed linopsinine. Generalized additive models were used to model data collected dunng 1992 and 1995. Parasites were less prevalent on female crabs and most prevalent in submarine canyons The former effect may be due to sex-specific differences in gill cleaning behavior, and the latter effect may result from reduced gill cleaning efficiency in areas where the seafloor is covered with fine sediment. The size-prevalence curve was dome-shaped: this probably indicates that B. callosus reduces the growth rate and increases the mortality rate of P spin- osissima. Parasite prevalence decreased with increasing crab density but increased with increasing parasitized crab density. These results suggest that parasitized crabs do not aggregate with unpara- sitized males. Habitat was a significant source of variation in hyperparasite prevalence during 1992 but not 1995. Between-year comparisons of parasite and hyperparasite prevalences were equivocal and failed to provide convincing evidence against parameter statlonanty and stability in the P. spinosis- sima-B. callosus-liriopsinine system KEY WORDS: Lithodid crabs . Rhizocephalan barnacles . Cryptoniscid isopods . Parasitism . Hyper- parasitism - Prevalence . Generalized additive models INTRODUCTION isopods generally have rhizocephalan hosts (Caullery 1908, Nielsen & Stromberg 1973). Paralomis spinosissima is a lithodid crab that has Parasitized and hyperparasitized Paralomis spinosis- recently been targeted by an exploratory fishery oper- sima are easy to identify. A parasitized crab is recog- ating off the south Atlantic island of South Georgia. P. nizable when at least one externa (this is the rhizo- spinosissima is frequently parasitized by the rhizo- cephalan's reproductive structure) has emerged cephalan Briarosaccus callosus, and many of the rhizo- through the ventral abdominal cuticle. This method of cephalans are, in turn, hosts for an hyperparasitic iso- identification may underestimate the true prevalence pod (Otto & MacIntosh 1996). The hyperparasite is rate because there is a lag between the times of initial currently undescribed, but lt is believed to be from the infection and emergence of the externa. A hyperpara- family Cryptoniscidae (Otto & MacIntosh 1996). Cryp- sitized crab is recognizable when at least one bulbous, toniscids comprise 7 subfamilies that can, in part, be sac-like structure (this is a female hyperparasite) has separated on the basis of host specificity (Nielsen & attached to the external surface of the rhizocephalan's Stromberg 1973). The hyperparasite of B. callosus is externa. probably from the subfamily Liriopsinae since these Histological sections of parasitized crabs have shown that an individual Briarosaccus callosus can sterilize its crab host (Sparks & Morado 1986), and 'Present address: Inter-Amencan Tropical Tuna Commission, histological sections of hyperparasitized rhizocepha- 8604 La Jolla Shores Drive, La Jolla, California 92037, USA. lans have shown that an individual liriopsinine can E-mail: [email protected] also sterilize its parasite host (Caullery 1908). These O Inter-Research 1998 Resale of full article not permitted 216 Mar Ecol Prog Ser 170: 215-229, 1998 facts are important because they imply that the popu- Liriopsinae have been found on at least 3 lithodids lation-level consequences of parasitism and hyperpar- that are known to be parasitized by Briarosaccus cal- asitism in the Paralomis spinosissima-B. callosus-liri- losus: Paralomis bouvieri (Pohle 1992a), Neolithodes opsinine system can be studied by considering grimaldii (Pohle 1992b), and Paralomis spinosissima prevalence rates rather than infection intensities (i.e. (Otto & Macintosh 1996). These 3 accounts contain parasite and hyperparasite burdens). There are in- few data on the prevalence of hyperparasitized crabs, stances of multiple parasitism and hyperparasitism and there is no information about which variables around South Georgia, but it is questionable whether contribute to variation in hyperparasite prevalence. these instances have a substantial impact on the sys- The literature does, however, contain information on. tem's dynamics. This view is supported by the work of vanation in the prevalences of hosts parasitized by Kuris (1974). Kuris noted that multiple infections by isopods from another subfamily in the Cryptonisci- parasitic castrators and hypercastrators like rhizo- dae, the Cabiropsinae. Cabiropsinae parasitize iso- cephalans and Liriopsinae do not usually have addi- pods (Nielsen & Strijmberg 1973); some Cabiropsinae tive pathogenic effects on individual hosts. The out- are parasites, others are hyperparasites. Nielsen & come from a single act of parasitic castration (or Stromberg (1965) studied a parasitic cabiropsinine. hypercastration) has the same population-level conse- They found that cabiropsinine prevalence varied with quence (i.e. the 'reproductive death' of one host) as host sex, host maturity state, host size, and month. the outcome from an instance of multiple parasitic Nielsen & Stromberg also noted that there may be castration (or hypercastration). geographical differences in cabiropsinine prevalence. In the case of Briarosaccus callosus, a second argu- Sassaman (1985) and Owens (1993) studied hyperpar- ment can be made for considering parasite prevalence asitic Cabiropsinae. The hyperparasitic Cabiropsinae rather than intensity of infection. The size of an externa are typically hosted by bopyrid isopods (bopyrids par- is positively correlated with the host crab's carapace asitize many marine crustaceans, and the family length, but the average size of externae involved in Bopyridae is closely related to the Cryptoniscidae). multiple infections is smaller than the average size of Sassaman observed that cabiropsinine prevalence externae from single infections (Bower & Sloan 1985). varied with changes in bopyrid abundance. Owens Under the reasonable assumption that the fecundity of observed that cabiropsinine prevalence varied with B, callosus is positively correlated with externa size, season, geographical area, bopyrid size, the bopyrid the findings of Bower & Sloan (1985) suggest that the host's size (in this case the bopyrids parasitized total fecundity of a population of B. callosus is limited various species of prawns), and the bopyrid's host more by numbers and sizes of parasitized crabs than species. by numbers of parasite externae. The objective of this study is to develop an appropri- Briarosaccus callosus parasitizes at least 12 species ate context for the construction of a mathematical host- of lithodid crabs (Boschma 1962, Hoggarth 1990, Pohle parasite-hyperparasite model that describes the Par- 1992a, Hseg 1995), and the prevalence of this rhizo- alomis spinosissima-Briarosaccus callosus-liriopsinine cephalan varies both between and w~thinits host spe- system (this mathematical model is presented in G. cies. Between hosts, prevalence rates can vary from Watters & R. Deriso unpubl.). This context develop- less than 1 % (e.g. Paralomis granulosa from the Falk- ment includes consideration of whether the P. spinosis- land Islands in Hoggarth 1990) to more than 75 % (e.g. sima-B. callosus-liriopsinine system is governed by Paralithodes platypus from Glacier Bay, Alaska in stationary (temporally invariant) population dynamics Hawkes et al. 198613).A number of variables contribute parameters and whether the system is stable. These 2 to within-species variation in B. callosus prevalence. topics are addressed by a sequence of comparisons in These variables include the sex and size of an individ- which statistical models of parasite and hyperparasite ual host (e.g. Sloan 1984, Hawkes et al. 1985c, 198613, prevalence rates are initially constructed from one set Hoggarth 1990, Abello & Macpherson 1992) as well as of data and then compared to data that were collected the habitat from which an individual crab was cap- 3 yr later. Checks for stationarity and stability have not tured (e.g. Sloan 1984, Hawkes et al. 1986a, b). Differ- been made in previous studies of lithodid-B. callosus ences in local densities of unparasitized and para- relationships. sitized crabs may also contribute to within-host variation in paraslte prevalence. For example, Sloan (1984) observed prevalence rates between about 3 and MATERIALS AND METHODS 44'26 on Lithodes aequispina at locations where catches per unit of effort (catch rates are proxy esti- Data sources. Two data sets were used to study vari- mates of local crab density) varied between about 3 ation in the prevalence of parasitized and hyperpara- and 24 crabs caught per trap fished. sitized Paralomis spinosissima; one data set was col- Watters: Prevalences of parasitized and hyperparasitized crabs lected in 1992, and the other was collected in 1995. Otto & Macintosh (1996) made biologi- cal observations on a large sample of P. spin- osissima; a subset of their observations com- prised the '1992 data'. The 1992 data included records of the sex, size (carapace length in mm), and parasitism and hyperparasitism
Load more

Recommended publications
  • Symposium Full Program
    11.4 Center for Condensed Matter Sciences, NTU 11.5-6 Howard Civil Service International House 2019 Organizer Ecological Engineering Research Center, National Taiwan University Co-Organizers College of Bioresources and Agriculture, National Taiwan University Wisdom Informatics Solutions for Environment Co., Ltd Symposium Program Sponsors Biodiversity Research Center, Academia Sinica The Japanese Association of Benthology Marine National Park Headquartrers, Taiwan Ministry of Science and Technology, Taiwan The Plankton Society of Japan Ocean Conversation Administration, Ocean Affairs Council, Taiwan Contents Welcome Messages .........................................................................2 More Welcomes and Greetings from Previous AMBS Chairmans .................................................3 Symposium Schedule ......................................................................7 Conference Information ................................................................8 Symposium Venue Map ..................................................................9 Information for the Presenters .................................................11 Student Presentation Contest Rules .......................................12 Presentation Schedule .................................................................13 Poster Presentation Schedule ...................................................20 Keynote Speaker Abstracts & Biographies ............................25 Organizers and Sponsors.............................................................32
    [Show full text]
  • Husky Energy REPORT I
    [ ~ Husky Energy REPORT I Labrador Shelf Seismic Program - Environmental Assessment Canada-Newfoundland and Labrador Offshore Petroleum Board 5th Floor, TO Place 140 Water Street St. John's, NL A1C 6H6 Husky Energy 235 Water Street, Suite 901 St. John's, NL A1C 1B6 Signature: Date: February 26, 2010 Full Name and Francine Wight Title: Environment Lead Prepared by Reviewed by HDMS No.: 004085338 EC-HSE-SY-0003 1 All rights reserved. CONFIDENTlALIlY NOTE: No part of this document may be reproduced or transmitted in any form or by any means without the written permission of Husky Energy. EC-FT-00012 Labrador Shelf Seismic Program – Environmental Assessment Executive Summary Husky Energy proposes to undertake 2-D and 3-D seismic and follow-up geo-hazard surveys on its exploration acreage (Exploration Licenses 1106 and 1108) on the Labrador Shelf. Husky foresees the potential for a 2-D seismic survey in the summer of 2010, while other surveys – 2- D, 3-D or geo-hazard and Vertical Seismic Profiles – may occur at various times between 2010 and 2017. This document provides a Screening Level Environmental Assessment to allow the Canada- Newfoundland and Labrador Offshore Petroleum Board (C-NLOPB) to fulfill its responsibilities under the Canadian Environmental Assessment Act. During the course of the environmental assessment, Husky Energy consulted with stakeholders with an interest in the Project. Husky Energy and consultants undertook a consultation program with the interested stakeholders in Happy Valley-Goose Bay, Nain, Rigolet, Postville, Hopedale, Cartwright, Makkovik and Sheshatshiu, as well as consultation with regulatory agencies and other stakeholders in St.
    [Show full text]
  • A Possible 150 Million Years Old Cirripede Crustacean Nauplius and the Phenomenon of Giant Larvae
    Contributions to Zoology, 86 (3) 213-227 (2017) A possible 150 million years old cirripede crustacean nauplius and the phenomenon of giant larvae Christina Nagler1, 4, Jens T. Høeg2, Carolin Haug1, 3, Joachim T. Haug1, 3 1 Department of Biology, Ludwig-Maximilians-Universität München, Großhaderner Straße 2, 82152 Planegg- Martinsried, Germany 2 Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Copenhagen, Denmark 3 GeoBio-Center, Ludwig-Maximilians-Universität München, Richard-Wagner-Straße 10, 80333 Munich, Germany 4 E-mail: [email protected] Key words: nauplius, metamorphosis, palaeo-evo-devo, Cirripedia, Solnhofen lithographic limestones Abstract The possible function of giant larvae ................................ 222 Interpretation of the present case ....................................... 223 The larval phase of metazoans can be interpreted as a discrete Acknowledgements ....................................................................... 223 post-embryonic period. Larvae have been usually considered to References ...................................................................................... 223 be small, yet some metazoans possess unusually large larvae, or giant larvae. Here, we report a possible case of such a giant larva from the Upper Jurassic Solnhofen Lithographic limestones (150 Introduction million years old, southern Germany), most likely representing an immature cirripede crustacean (barnacles and their relatives). The single specimen was documented with up-to-date
    [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]
  • Barnacle Paper.PUB
    Proc. Isle Wight nat. Hist. archaeol. Soc . 24 : 42-56. BARNACLES (CRUSTACEA: CIRRIPEDIA) OF THE SOLENT & ISLE OF WIGHT Dr Roger J.H. Herbert & Erik Muxagata To coincide with the bicentenary of the birth of the naturalist Charles Darwin (1809-1889) a list of barnacles (Crustacea:Cirripedia) recorded from around the Solent and Isle of Wight coast is pre- sented, including notes on their distribution. Following the Beagle expedition, and prior to the publication of his seminal work Origin of Species in 1859, Darwin spent eight years studying bar- nacles. During this time he tested his developing ideas of natural selection and evolution through precise observation and systematic recording of anatomical variation. To this day, his monographs of living and fossil cirripedia (Darwin 1851a, 1851b, 1854a, 1854b) are still valuable reference works. Darwin visited the Isle of Wight on three occasions (P. Bingham, pers.com) however it is unlikely he carried out any field work on the shore. He does however describe fossil cirripedia from Eocene strata on the Isle of Wight (Darwin 1851b, 1854b) and presented specimens, that were supplied to him by other collectors, to the Natural History Museum (Appendix). Barnacles can be the most numerous of macrobenthic species on hard substrata. The acorn and stalked (pedunculate) barnacles have a familiar sessile adult stage that is preceded by a planktonic larval phase comprising of six naupliar stages, prior to the metamorphosis of a non-feeding cypris that eventually settles on suitable substrate (for reviews on barnacle biology see Rainbow 1984; Anderson, 1994). Additionally, the Rhizocephalans, an ectoparasitic group, are mainly recognis- able as barnacles by the external characteristics of their planktonic nauplii.
    [Show full text]
  • The Crustacean Society Mid-Year Meeting 2019
    THE CRUSTACEAN SOCIETY MID-YEAR MEETING 2019 ABSTRACT BOOKLET Table of Contents PLENARY LECTURES ........................................................................................................... 1 ORAL PRESENTATIONS ...................................................................................................... 7 SYMPOSIUM 1: Frontiers in Crustacean Biology: Asian Perspectives ................................ 43 SYMPOSIUM 2: Recent Advances in Caridean Systematics ............................................... 53 SYMPOSIUM 3: Evolution and Ecology of Parasitic and Symbiotic Crustaceans ................ 59 SYMPOSIUM 4: Biology of Freshwater Crayfish ................................................................ 69 SYMPOSIUM 5: Deep-sea Biodiversity: A Crustacean Perspective .................................... 77 SYMPOSIUM 6: Comparative Endocrinology and Genomics in Arthropods ....................... 87 SYMPOSIUM 7: Fossil and Modern Clam Shrimp .............................................................. 97 SYMPOSIUM 8: Aquaculture Biotechnology of Crabs ..................................................... 108 POSTER PRESENTATIONS ............................................................................................... 114 PLENARY LECTURES PL1 Effects of temperature variations on reproduction: Transduction of physiological stress through species interactions between two porcelain crabs B. TSUKIMURA1, ALEX GUNDERSON2, JONATHON STILLMAN3 1. California State University, Fresno, USA 2. Tulane University, USA 3.
    [Show full text]
  • BENTHOS Scottish Association for Marine Science October 2002 Authors
    DTI Strategic Environmental Assessment 2002 SEA 7 area: BENTHOS Scottish Association for Marine Science October 2002 Authors: Peter Lamont, <[email protected]> Professor John D. Gage, <[email protected]> Scottish Association for Marine Science, Dunstaffnage Marine Laboratory, Oban, PA37 1QA http://www.sams.ac.uk 1 Definition of SEA 7 area The DTI SEA 7 area is defined in Contract No. SEA678_data-03, Section IV – Scope of Services (p31) as UTM projection Zone 30 using ED50 datum and Clarke 1866 projection. The SEA 7 area, indicated on the chart page 34 in Section IV Scope of Services, shows the SEA 7 area to include only the western part of UTM zone 30. This marine part of zone 30 includes the West Coast of Scotland from the latitude of the south tip of the Isle of Man to Cape Wrath. Most of the SEA 7 area indicated as the shaded area of the chart labelled ‘SEA 7’ lies to the west of the ‘Thunderer’ line of longitude (6°W) and includes parts of zones 27, 28 and 29. The industry- adopted convention for these zones west of the ‘Thunderer’ line is the ETRF89 datum. The authors assume that the area for which information is required is as indicated on the chart in Appendix 1 SEA678 areas, page 34, i.e. the west (marine part) of zone 30 and the shaded parts of zones 27, 28 and 29. The Irish Sea boundary between SEA 6 & 7 is taken as from Carlingford Lough to the Isle of Man, then clockwise around the Isle of Man, then north to the Scottish coast around Dumfries.
    [Show full text]
  • Anomura and Brachyura
    Canadian Technical Report of Fisheries and Aquatic Sciences 1771 December 1990 A GUIDE TO DECAPOD CRUSTACEA FROM THE CANADIAN ATLANTIC: ANOMURA AND BRACHYURA Gerhard W. Pohle' Biological Sciences Branch Department of Fisheries and Oceans Biological Station St. Andrews, New Brunswick EOG 2XO Canada ,Atlantic Reference Centre, Huntsman Marine Science Centre St. Andrews, New Brunswick EOG 2XO Canada This is the two hundred and eleventh Technical Report from the Biological Station, St. Andrews, N. B. ii . © Minister of Supply and Services Canada 1990 Cat. No. Fs 97-611771 ISSN 0706-6457 Correct citation for this publication: Pohle, G. W. _1990. A guide to decapod Crustacea from the Canadian Atlantic: Anorrora and Brachyura. Can. Tech. Rep. Fish. Aquat. SCi. 1771: iv + 30 p. iii TABLE OF CONTENTS Page Abstract ..............................................................." iv Introduction 1 How to use this guide " 2 General morphological description 3 How to distinguish anomuran and brachyuran decapods 5 How to distinguish the families of anornuran crabs 6 Family Paguridae Pagurus acadianus Benedict, 1901 ........................................ .. 7 Pagurus arcuatus Squires, 1964 .......................................... .. 8 Pagurus longicarpus Say, 1817 9 Pagurus politus (Smith, 1882) 10 Pagurus pubescens (Kmyer, 1838) 11 Family Parapaguridae P.arapagurus pilosimanus Smith, 1879 12 Family Lithodidae Lithodes maja (Linnaeus, 1758) 13 Neolithodes grimaldii (Milne-Edwards and Bouvier, 1894) 14 Neolithodes agassizii (Smith 1882) 14 How to distinguish the families of brachyuran crabs 15 Family Majidae Chionoecetes opilio (Fabricius, 1780) 17 Hyas araneus (Linnaeus, 1758) 18 Hyas coarctatus Leach, 1815 18 Libinia emarginata Leach, 1815 19 Family Cancridae Cancer borealis Stimpson, 1859 20 Cancer irroratus Say, 1817 20 Family Geryonidae Chaceon quinquedens (Smith, 1879) 21 Family Portunidae Ovalipes ocellatus (Herbst,- 1799) 22 Callinectes sapidus Rathbun, 1896 ...................................
    [Show full text]
  • Movement Ecology of the Greenland Shark
    University of Windsor Scholarship at UWindsor Electronic Theses and Dissertations Theses, Dissertations, and Major Papers 7-29-2020 Movement ecology of the Greenland shark (Somniosus microcephalus): Identifying tools, management considerations, and horizontal movement behaviours using multi-year acoustic telemetry Jena Elizabeth Edwards University of Windsor Follow this and additional works at: https://scholar.uwindsor.ca/etd Recommended Citation Edwards, Jena Elizabeth, "Movement ecology of the Greenland shark (Somniosus microcephalus): Identifying tools, management considerations, and horizontal movement behaviours using multi-year acoustic telemetry" (2020). Electronic Theses and Dissertations. 8414. https://scholar.uwindsor.ca/etd/8414 This online database contains the full-text of PhD dissertations and Masters’ theses of University of Windsor students from 1954 forward. These documents are made available for personal study and research purposes only, in accordance with the Canadian Copyright Act and the Creative Commons license—CC BY-NC-ND (Attribution, Non-Commercial, No Derivative Works). Under this license, works must always be attributed to the copyright holder (original author), cannot be used for any commercial purposes, and may not be altered. Any other use would require the permission of the copyright holder. Students may inquire about withdrawing their dissertation and/or thesis from this database. For additional inquiries, please contact the repository administrator via email ([email protected]) or by telephone at
    [Show full text]
  • 13887-001.Pdf
    FEDERATION FRANÇAISE DES SOCIETES DE SCIENCES NATURELLES B.P. 392 - 75232 PARIS Cedex 05 er J*^ ^ Association régie par la loi du 1 juillet 1901, fondée en 1919, reconnue d'utilité publique en 1S K 5L^< <»• Membre fondateur de l'UICN - Union Mondiale pour la Nature La FÉDÉRATION FRANÇAISE DES SOCIÉTÉS DE SCIENCES NATURELLES a été fondée en 1919 et reconnue d'utilité publique par décret du 30 Juin 1926. Elle groupe des Associations qui ont pour but, entièrement ou partiellement, l'étude et la diffusion des Sciences de la Nature. La FÉDÉRATION a pour mission de faire progresser ces sciences, d'aider à la protection de la Nature, de développer et de coordonner des activités des Associations fédérées et de permettre l'expansion scientifique française dans le domaine des Sciences Naturelles. (Art .1 des statuts). La FÉDÉRATION édite la « Faune de France ». Depuis 1921, date de publication du premier titre, 90 volumes sont parus. Cette prestigieuse collection est constituée par des ouvrages de faunistique spécialisés destinés à identifier des vertébrés, invertébrés et protozoaires, traités par ordre ou par famille que l'on rencontre en France ou dans une aire géographique plus vaste (ex. Europe de l'ouest). Ces ouvrages s'adressent tout autant aux professionnels qu'aux amateurs. Ils ont l'ambition d'être des ouvrages de référence, rassemblant, notamment pour les plus récents, l'essentiel des informations scientifiques disponibles au jour de leur parution. L'édition de la Faune de France est donc l'œuvre d'une association à but non lucratif animée par une équipe entièrement bénévole.
    [Show full text]
  • Decapoda (Crustacea) of the Gulf of Mexico, with Comments on the Amphionidacea
    •59 Decapoda (Crustacea) of the Gulf of Mexico, with Comments on the Amphionidacea Darryl L. Felder, Fernando Álvarez, Joseph W. Goy, and Rafael Lemaitre The decapod crustaceans are primarily marine in terms of abundance and diversity, although they include a variety of well- known freshwater and even some semiterrestrial forms. Some species move between marine and freshwater environments, and large populations thrive in oligohaline estuaries of the Gulf of Mexico (GMx). Yet the group also ranges in abundance onto continental shelves, slopes, and even the deepest basin floors in this and other ocean envi- ronments. Especially diverse are the decapod crustacean assemblages of tropical shallow waters, including those of seagrass beds, shell or rubble substrates, and hard sub- strates such as coral reefs. They may live burrowed within varied substrates, wander over the surfaces, or live in some Decapoda. After Faxon 1895. special association with diverse bottom features and host biota. Yet others specialize in exploiting the water column ment in the closely related order Euphausiacea, treated in a itself. Commonly known as the shrimps, hermit crabs, separate chapter of this volume, in which the overall body mole crabs, porcelain crabs, squat lobsters, mud shrimps, plan is otherwise also very shrimplike and all 8 pairs of lobsters, crayfish, and true crabs, this group encompasses thoracic legs are pretty much alike in general shape. It also a number of familiar large or commercially important differs from a peculiar arrangement in the monospecific species, though these are markedly outnumbered by small order Amphionidacea, in which an expanded, semimem- cryptic forms. branous carapace extends to totally enclose the compara- The name “deca- poda” (= 10 legs) originates from the tively small thoracic legs, but one of several features sepa- usually conspicuously differentiated posteriormost 5 pairs rating this group from decapods (Williamson 1973).
    [Show full text]
  • 5.5. Biodiversity and Biogeography of Decapods Crustaceans in the Canary Current Large Marine Ecosystem the R
    Biodiversity and biogeography of decapods crustaceans in the Canary Current Large Marine Ecosystem Item Type Report Section Authors García-Isarch, Eva; Muñoz, Isabel Publisher IOC-UNESCO Download date 25/09/2021 02:39:01 Link to Item http://hdl.handle.net/1834/9193 5.5. Biodiversity and biogeography of decapods crustaceans in the Canary Current Large Marine Ecosystem For bibliographic purposes, this article should be cited as: García‐Isarch, E. and Muñoz, I. 2015. Biodiversity and biogeography of decapods crustaceans in the Canary Current Large Marine Ecosystem. In: Oceanographic and biological features in the Canary Current Large Marine Ecosystem. Valdés, L. and Déniz‐González, I. (eds). IOC‐ UNESCO, Paris. IOC Technical Series, No. 115, pp. 257‐271. URI: http://hdl.handle.net/1834/9193. The publication should be cited as follows: Valdés, L. and Déniz‐González, I. (eds). 2015. Oceanographic and biological features in the Canary Current Large Marine Ecosystem. IOC‐UNESCO, Paris. IOC Technical Series, No. 115: 383 pp. URI: http://hdl.handle.net/1834/9135. The report Oceanographic and biological features in the Canary Current Large Marine Ecosystem and its separate parts are available on‐line at: http://www.unesco.org/new/en/ioc/ts115. The bibliography of the entire publication is listed in alphabetical order on pages 351‐379. The bibliography cited in this particular article was extracted from the full bibliography and is listed in alphabetical order at the end of this offprint, in unnumbered pages. ABSTRACT Decapods constitute the dominant benthic group in the Canary Current Large Marine Ecosystem (CCLME). An inventory of the decapod species in this area was made based on the information compiled from surveys and biological collections of the Instituto Español de Oceanografía.
    [Show full text]