DOCSLIB.ORG

Amphipholis Squamata: Immunohistochemical and Radioimmunoassay

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Amphipholis Squamata: Immunohistochemical and Radioimmunoassay Echinoderms: San Francisco, Mooi& Tellord(eds)© 1998Balkema, Rotterdam, ISBN 90 5410 929 7 Presence of the SALMFamide neuropeptides S 1 and S2 in the britdestar Amphipholis squamata: Immunohistochemical and radioimmunoassay detection .\ /\ - N. De Bremaeker, J. Mallefet & F. Baguet Laboratory of Animal Physiology, Catholic University ofLomain, Belgium M.C.Thomdyke & D.J.Potton Department of Biology, Royal Holloway University of London, UK D.Deheyn Laboratory of Marine Biology, University of Brussels, Belgium Recendy a novel faimly of echinoderm ACKNOWLEDGEMENTS: neuropepddes, the SALMFamides, has been characterized. Sl and S2 were isolated from radial This work was supported by a cooperation grant nerve cords of the starfishes Asterias rubens and CGRI-British Council-FNRS. Financial support Asteriasforbesi (Hphick et al. 1991). S3 and S4 from FDS (UCL) and FRFC (number 6.231.85), were isolated and sequenced from extracts of the Contribution of the "Centre Interuniversitaire de digestive system of the sea cucumba" Holothuna Biologie Marine" (CIBIM). gCabemma (Diaz-Miranda et al. 1992). immunocytochemistry and radio-immunoassay studies have shown'Sl and S2 to be widely REFERENCES distributed in the nervous systems of asteroids, echinoids, and ophiuroids. Physiological Cobb J.L.S. & Stubbs T.R. 1981. The giant experiment, have shown that the neuropepddes neuron system in ophiuroids. I. The general Sl and S2 have neuromodulating effects on the morphology of the radial nerve cords and the luminescence of Amphipholis squamata, a. smaU circumoral nerve ring. Cell Tissue Res., 219, 197-207. cosmopolitan ophiuroid (Mallefet et <d. 1994). Sl and S2 at 10-9 M and 10-10 M, respectively, Deheyn D., Alva V. & Jangoux M. 1996. Fine potentiate the acetylcholine-induced luimnescence. structure of the photogenous areas in the The aim of this work was to detect the bioluminescent ophiuroid Amphipholis presence of Sl and S2_ in_A, squamata by squamata (Echinodermata, Ophiuridea). immunohistochemistry and radioimmunoassay; Zoomorphology 116: 195-204^ The nervous system of A. squamata consists Diaz-Mirahda L., Price D.A., Greenberg M.J., of radial nerve cords that run ventrally along all Lee T.D., Dobble K.E. & Garcia-Arraras J.E. two novel arms. The radial nerve cords of the five arms are 1992. Characterization of from the sea cucumber interconnected by the circumoral nerve ring neuropeptides (Deheyn et al. 1996). Each radial nerve cord and Holothuria glaberrima. Biol. Bull. 182:241- the circumoral nerve ring are composed of two 247. ElphickM-R., Price D.A^ Lee Y. & Thomdyke superimposed nerve plexuses, the ectoneural M.C. 1991. The SALMFamides: a new famUy plexus Mid the hyponeural plexus. In this study, Sl-like immunorractivity was detected in _ both of neuropq)ddes isolated from an echinoderm. Proc. RSoc. Land. B. 243:121-127. plexuses of the brachial nerve cord and Ae circumoral ring. S2-Ute immunoreactivity was Ghyoot M., Cobb J.L.S. & Thomdyke M.C. 1991. Localizadon of neuropeptides m the only wealdy detected in the ectoneural plexus of the'brachiaf radial nerve cord and the circumoral nervous system of the brittle star Ophium nerve ring. The immuno-reactivily patten ophiura. Phil. Trans. R. Soc. Land. B. observed iii the radial nerve cord of one arm 346:433-444. MaUefetJ.,DeBremaekerN. & Baguet F. 1994. segment is_identical to that of the adjacent arm Neuromodulatory effects ofGABA, Sl_ & 82, segment. Such segmental oiganization of the PMRFamide and ANTHO-RFamideon nearve cord was reported previously by Cobb and Stubbs (1981) and Ghyootetal. (1994). Amphipholis squamata (Echinodermata) The radioimmunoassay results _from acetone luminescence. In: A.K. Campbell, L.J.Kricka extracts of A. squamata showed 0.006 pmojes of & P.E. Stanley (eds.), Bioluminescence and Sl/mg wet weight and 0.025 pmoles of S2/mg chemi-luminescence: 109-112. J. WUey & Sons, Chichester. wet weight. It is interesting to note that there seems to be a seasonal variation in Sl and S2 . concentrations. 343.
Load more

Recommended publications
  • Amphipholis Squamata MICHAEL P
    APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Aug. 1990, p. 2436-2440 Vol. 56, No. 8 0099-2240/90/082436-05$02.00/0 Copyright C) 1990, American Society for Microbiology Description of a Novel Symbiotic Bacterium from the Brittle Star, Amphipholis squamata MICHAEL P. LESSERt* AND RICHARD P. BLAKEMORE Department of Microbiology, University of New Hampshire, Durham, New Hampshire 03824 Received 8 November 1989/Accepted 3 June 1990 A gram-negative, marine, facultatively anaerobic bacterial isolate designated strain AS-1 was isolated from the subcuticular space of the brittle star, Amphipholis squamata. Its sensitivity to 0/129 and novobiocin, overall morphology, and biochemical characteristics and the moles percent guanine-plus-cytosine composition of its DNA (42.9 to 44.4) suggest that this isolate should be placed in the genus Vibrio. Strain AS-1 was not isolated from ambient seawater and is distinct from described Vibrio species. This symbiotic bacterium may assist its host as one of several mechanisms of nutrient acquisition during the brooding of developing embryos. The biology of bacterium-invertebrate symbiotic associa- isopropyl alcohol for 30 s and two rinses in sterile ASW. tions has elicited considerable interest, particularly since the Logarithmic dilutions were plated on Zobell modified 2216E discoveries during the past decade of chemoautotrophic medium (ASW, 1 g of peptone liter-1, 1 g of yeast extract symbiotic bacteria associated with several invertebrate spe- liter-' [pH 7.8 to 8.4]) (29), as were samples of ambient cies in sulfide-rich habitats (4, 5). Bacterial-invertebrate seawater from the site of collection and ASW controls. All symbioses (mutualistic) have been reported from many materials and equipment were sterilized, and all procedures invertebrate taxa, examples of which include cellulolytic were performed by aseptic techniques.
    [Show full text]
  • Lack of Taxonomic Differentiation in An
    ARTICLE IN PRESS Molecular Phylogenetics and Evolution xxx (2005) xxx–xxx www.elsevier.com/locate/ympev Lack of taxonomic diVerentiation in an apparently widespread freshwater isopod morphotype (Phreatoicidea: Mesamphisopidae: Mesamphisopus) from South Africa Gavin Gouws a,¤, Barbara A. Stewart b, Conrad A. Matthee a a Evolutionary Genomics Group, Department of Botany and Zoology, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa b Centre of Excellence in Natural Resource Management, University of Western Australia, 444 Albany Highway, Albany, WA 6330, Australia Received 20 December 2004; revised 2 June 2005; accepted 2 June 2005 Abstract The unambiguous identiWcation of phreatoicidean isopods occurring in the mountainous southwestern region of South Africa is problematic, as the most recent key is based on morphological characters showing continuous variation among two species: Mesam- phisopus abbreviatus and M. depressus. This study uses variation at 12 allozyme loci, phylogenetic analyses of 600 bp of a COI (cyto- chrome c oxidase subunit I) mtDNA fragment and morphometric comparisons to determine whether 15 populations are conspeciWc, and, if not, to elucidate their evolutionary relationships. Molecular evidence suggested that the most easterly population, collected from the Tsitsikamma Forest, was representative of a yet undescribed species. Patterns of diVerentiation and evolutionary relation- ships among the remaining populations were unrelated to geographic proximity or drainage system. Patterns of isolation by distance were also absent. An apparent disparity among the extent of genetic diVerentiation was also revealed by the two molecular marker sets. Mitochondrial sequence divergences among individuals were comparable to currently recognized intraspeciWc divergences. Sur- prisingly, nuclear markers revealed more extensive diVerentiation, more characteristic of interspeciWc divergences.
    [Show full text]
  • Key to the Common Shallow-Water Brittle Stars (Echinodermata: Ophiuroidea) of the Gulf of Mexico and Caribbean Sea
    See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/228496999 Key to the common shallow-water brittle stars (Echinodermata: Ophiuroidea) of the Gulf of Mexico and Caribbean Sea Article · January 2007 CITATIONS READS 10 702 1 author: Christopher Pomory University of West Florida 34 PUBLICATIONS 303 CITATIONS SEE PROFILE All content following this page was uploaded by Christopher Pomory on 21 May 2014. The user has requested enhancement of the downloaded file. All in-text references underlined in blue are added to the original document and are linked to publications on ResearchGate, letting you access and read them immediately. 1 Key to the common shallow-water brittle stars (Echinodermata: Ophiuroidea) of the Gulf of Mexico and Caribbean Sea CHRISTOPHER M. POMORY 2007 Department of Biology, University of West Florida, 11000 University Parkway, Pensacola, FL 32514, USA. [email protected] ABSTRACT A key is given for 85 species of ophiuroids from the Gulf of Mexico and Caribbean Sea covering a depth range from the intertidal down to 30 m. Figures highlighting important anatomical features associated with couplets in the key are provided. 2 INTRODUCTION The Caribbean region is one of the major coral reef zoogeographic provinces and a region of intensive human use of marine resources for tourism and fisheries (Aide and Grau, 2004). With the world-wide decline of coral reefs, and deterioration of shallow-water marine habitats in general, ecological and biodiversity studies have become more important than ever before (Bellwood et al., 2004). Ecological and biodiversity studies require identification of collected specimens, often by biologists not specializing in taxonomy, and therefore identification guides easily accessible to a diversity of biologists are necessary.
    [Show full text]
  • Isolation and Identification of Bacterial Endosymbionts in the Brooding Brittle Star Amphipholis Squamata
    University of New Hampshire University of New Hampshire Scholars' Repository Honors Theses and Capstones Student Scholarship Spring 2016 Isolation and identification of bacterial endosymbionts in the brooding brittle star Amphipholis squamata Abbey Rose Tedford University of New Hampshire - Main Campus Follow this and additional works at: https://scholars.unh.edu/honors Part of the Bacteriology Commons, Biodiversity Commons, Biology Commons, Environmental Microbiology and Microbial Ecology Commons, Marine Biology Commons, and the Organismal Biological Physiology Commons Recommended Citation Tedford, Abbey Rose, "Isolation and identification of bacterial endosymbionts in the brooding brittle star Amphipholis squamata" (2016). Honors Theses and Capstones. 273. https://scholars.unh.edu/honors/273 This Senior Honors Thesis is brought to you for free and open access by the Student Scholarship at University of New Hampshire Scholars' Repository. It has been accepted for inclusion in Honors Theses and Capstones by an authorized administrator of University of New Hampshire Scholars' Repository. For more information, please contact [email protected]. Isolation and identification of bacterial endosymbionts in the brooding brittle star Amphipholis squamata Abbey Rose Tedford, Kathleen M. Morrow, Michael P. Lesser Department of Molecular, Cellular and Biological Sciences, University of New Hampshire, Durham, NH 03824 Abstract: Symbiotic associations with subcuticular bacteria (SCB) have been identified and studied in numerous echinoderms, including the SCB of the brooding brittle star, Amphipholis squamata. These SCB, however, have not been studied using current next generation sequencing technologies. Previous studies on the SCB of A. squamata placed these bacteria in the genus Vibrio (γ-Proteobacteria), but subsequent studies suggested that the SCB are primarily composed of α-Proteobacteria.
    [Show full text]
  • Final Report Form
    Appendix K – OSRI Grant Policy Manual Final Report Form - Oil Spill Recovery Institute An electronic copy of this report shall be submitted by mail, or e-mail to the OSRI Research Program Manager [email protected] and Financial Office [email protected] Mailing address: P.O. Box 705 - Cordova, AK 99574 - Deadline for this report: Submittal within 90 days of grant/award expiration. Also, note that a summary Financial Statement shall be submitted within 45 days of the grant expiration. The final invoice and financial statement is due within 90 days of the grant/award expiration. Today’s date: 15 April 2014 Name of awardee/grantee: Bodil Bluhm OSRI Contract Number: 11-10-14 Project title: Data rescue: Epibenthic invertebrates from the Beaufort Sea sampled during WEBSEC and OCS cruises in the 1970s Dates project began and ended: PART I - Outline for Final Program or Technical Report This report must be submitted by all grantees. However, for those whose project work resulted in a peer reviewed publication (whether in draft or final form), this report may be abbreviated and the publication attached as part of the report. A. Non-technical Abstract or summary of project work that does not exceed 2 pages and includes an overview of the project. This abstract should describe the nature and significance of the project. It may be provided to the Advisory Board and could be used by OSRI staff to answer inquiries as to the nature and significance of the project. This project sought to rescue data on epibenthic invertebrates and fish sampled by trawls and photographs in the Alaskan Beaufort Sea during Western Beaufort Sea Ecological Cruise (WEBSEC) and Outer Continental Shelf (OCS) surveys in the 1970s.
    [Show full text]
  • The First Report of Amphipholis Squamata (Delle Chiaje, 1829) (Echinodermata: Ophiuroidea) from Chabahar Bay – Northern Oman Sea
    Short communication: The first report of Amphipholis squamata (Delle Chiaje, 1829) (Echinodermata: Ophiuroidea) from Chabahar Bay – northern Oman Sea Item Type article Authors Attaran-Fariman, G.; Beygmoradi, A. Download date 03/10/2021 21:12:16 Link to Item http://hdl.handle.net/1834/37693 Iranian Journal of Fisheries Sciences 15(3)1254-1261 2016 The first report of Amphipholis squamata (Delle Chiaje, 1829) (Echinodermata: Ophiuroidea) from Chabahar Bay – northern Oman Sea Attaran-Fariman G. *; Beygmoradi A. Received: December 2014 Accepted: April 2016 Chabahar Maritime University, Faculty of Marine Sciences, Department of Marine Biology, Daneshgah Avenue, 99717-56499, Chabahar, Iran. *Corresponding author's email: [email protected] Keywords: Echinoderms, Amphiuridae, Morphology, Taxonomy, Chabahar Bay; Oman Sea Introduction the cognates of this species (Deheyn Amphipholis squamata is an important and Jangoux, 1999). Also, this species Ophiuroid species belonging to the is one of the most important family Amphiuridae which is widely echinoderms in terms of used in biotechnological and molecular bioluminescence (Deheyn et al., 1997). studies. It is a cosmopolitan species and Bioluminescence echinoderms were capable to inhabit a wide variety of identified about two centuries ago habitats except the polar regions, from (Viviani, 1805), consisting 4 out of 5 subtidal zone to the depth of 2000 class of Echinodermata (Herring, 1987). meters (Hendler, 1995). According to The only class without bioluminescence Fell (1962) its widespread distribution ability is Echinoidea (Herring, 1987). all over the world is the result of its In the present study, Amphipholis costal migration. A. squamata is squamata was reported for the first time characterized by its small body size, from the subtidal zone of Chabahar Bay hermaphroditic reproduction, lack of in northern part of the Oman Sea.
    [Show full text]
  • Symbioses in Amphipholis Squamata "Echinodermata\ Ophiuroidea
    International Journal for Parasitology 17 "0887# 0302Ð0313 Symbioses in Amphipholis squamata "Echinodermata\ Ophiuroidea\ Amphiuridae#] geographical variation of infestation and e}ect of symbionts on the host|s light production Dimitri Deheyna\"\ Nikki A[ Watsonb\ Michel Jangouxa\ c aLaboratoire de Biologie marine "CP 059:04#\ Universite# Libre de Bruxelles\ 49 av[ F[D[ Roosevelt\ B!0949 Bruxelles\ Belgium bDivision of Zoology\ School of Biological Sciences\ University of New England\ Armidale\ NSW 1240\ Australia cLaboratoire de Biologie marine\ Universite# de Mons!Hainaut\ 08 av[ Maistriau\ B!6999 Mons\ Belgium Received 16 March 0887^ received in revised form 02 May 0887^ accepted 02 May 0887 Abstract Populations of the polychromatic and bioluminescent species Amphipholis squamata from eight locations were examined for internal and external symbionts[ At three locations "two in the United Kingdom and one in Papua New Guinea#\ no symbionts were present\ while four species were recovered from the remaining locations] Cancerilla tubulata and Parachordeumium amphiurae "copepods#\ Rhopalura ophiocomae "orthonectid# and an undescribed species of rhabdocoel turbellarian[ No ophiuroid individual hosted more than one symbiont species\ despite the presence of two or more within a population[ Symbiont presence and prevalence varied with location\ and with colour variety\ but with no apparent pattern or trends[ Light!production characteristics of the host were a}ected by the presence of all symbionts except C[ tubulata[ These e}ects\ however\ did
    [Show full text]
  • Enigmatic Ophiuroids from the New Caledonian Region
    Memoirs of Museum Victoria 73: 47–57 (2015) Published 2015 ISSN 1447-2546 (Print) 1447-2554 (On-line) http://museumvictoria.com.au/about/books-and-journals/journals/memoirs-of-museum-victoria/ Enigmatic ophiuroids from the New Caledonian region TimoThy D. o’hara (http://zoobank.org/urn:lsid:zoobank.org:author: 9538328F-592D-4DD0-9B3F-7D7B135D5263) anD Caroline harDing (http://zoobank.org/urn:lsid:zoobank.org:author: FC3B4738-4973-4A74-B6A4-F0E606627674) Museum Victoria, GPO Box 666E, Melbourne, 3001, AUSTRALIA, [email protected] http://zoobank.org/urn:lsid:zoobank.org:pub:512A862A-245D-4C94-AA7D-68CE5B7F9710 Abstract O’Hara, T.D. and Harding, C. 2015. Enigmatic ophiuroids from the New Caledonian region. Memoirs of Museum Victoria 73: 47–57. Three new species are described from New Caledonia which have been provisionally placed in the genera Ophiohamus (Ophiacanthidae), Ophionereis (Ophionereididae) and Ophiodaphne (Amphiuridae) respectively, pending a comprehensive revision of the Ophiuroidea. In addition, new specimens and morphological variation is described for the species Amphipholis linopneusti (Amphiuridae). Our knowledge of the deep-sea fauna of New Caledonia remains incomplete. Keywords Brittle-stars, marine, continental slope, Pacific Ocean, Ophiohamus, Ophionereis, Ophiodaphne, Amphipholis. Introduction specimens we have not attempted dissection or SEM photography and the species descriptions are only of external Our knowledge about deep-sea biodiversity is inadequate. features. The images were taken with a Visionary Digital Expeditions to even well-sampled regions continually turn up new species; many of which challenge our preconceived notions Integrated System, using a Canon 5D Mark II camera with about the evolution of marine animals and their established EF100mm and MP-E65mm macro-lenses, and montaged taxonomy.
    [Show full text]
  • Marine Invertebrate Biodiversity from the Argentine Sea, South Western Atlantic
    A peer-reviewed open-access journal ZooKeys 791: 47–70Marine (2018) invertebrate biodiversity from the Argentine Sea, South Western Atlantic 47 doi: 10.3897/zookeys.791.22587 DATA PAPER http://zookeys.pensoft.net Launched to accelerate biodiversity research Marine invertebrate biodiversity from the Argentine Sea, South Western Atlantic Gregorio Bigatti1,2,3, Javier Signorelli1 1 Laboratorio de Reproducción y Biología Integrativa de Invertebrados Marinos, (LARBIM) IBIOMAR-CO- NICET. Bvd. Brown 2915 (9120) Puerto Madryn, Chubut, Argentina 2 Universidad Nacional de la Pata- gonia San Juan Bosco, Boulevard Brown 3051, Puerto Madryn, Chubut, Argentina 3 Facultad de Ciencias Ambientales, Universidad Espíritu Santo, Ecuador Corresponding author: Javier Signorelli ([email protected]) Academic editor: P. Stoev | Received 13 December 2017 | Accepted 7 September 2018 | Published 22 October 2018 http://zoobank.org/ECB902DA-E542-413A-A403-6F797CF88366 Citation: Bigatti G, Signorelli J (2018) Marine invertebrate biodiversity from the Argentine Sea, South Western Atlantic. ZooKeys 791: 47–70. https://doi.org/10.3897/zookeys.791.22587 Abstract The list of marine invertebrate biodiversity living in the southern tip of South America is compiled. In particular, the living invertebrate organisms, reported in the literature for the Argentine Sea, were checked and summarized covering more than 8,000 km of coastline and marine platform. After an exhaustive lit- erature review, the available information of two centuries of scientific contributions is summarized. Thus, almost 3,100 valid species are currently recognized as living in the Argentine Sea. Part of this dataset was uploaded to the OBIS database, as a product of the Census of Marine Life-NaGISA project.
    [Show full text]
  • Ostrovsky Et 2016-Biological R
    Matrotrophy and placentation in invertebrates: a new paradigm Andrew Ostrovsky, Scott Lidgard, Dennis Gordon, Thomas Schwaha, Grigory Genikhovich, Alexander Ereskovsky To cite this version: Andrew Ostrovsky, Scott Lidgard, Dennis Gordon, Thomas Schwaha, Grigory Genikhovich, et al.. Matrotrophy and placentation in invertebrates: a new paradigm. Biological Reviews, Wiley, 2016, 91 (3), pp.673-711. 10.1111/brv.12189. hal-01456323 HAL Id: hal-01456323 https://hal.archives-ouvertes.fr/hal-01456323 Submitted on 4 Feb 2017 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Biol. Rev. (2016), 91, pp. 673–711. 673 doi: 10.1111/brv.12189 Matrotrophy and placentation in invertebrates: a new paradigm Andrew N. Ostrovsky1,2,∗, Scott Lidgard3, Dennis P. Gordon4, Thomas Schwaha5, Grigory Genikhovich6 and Alexander V. Ereskovsky7,8 1Department of Invertebrate Zoology, Faculty of Biology, Saint Petersburg State University, Universitetskaja nab. 7/9, 199034, Saint Petersburg, Russia 2Department of Palaeontology, Faculty of Earth Sciences, Geography and Astronomy, Geozentrum,
    [Show full text]
  • (Marlin) Review of Biodiversity for Marine Spatial Planning Within
    The Marine Life Information Network® for Britain and Ireland (MarLIN) Review of Biodiversity for Marine Spatial Planning within the Firth of Clyde Report to: The SSMEI Clyde Pilot from the Marine Life Information Network (MarLIN). Contract no. R70073PUR Olivia Langmead Emma Jackson Dan Lear Jayne Evans Becky Seeley Rob Ellis Nova Mieszkowska Harvey Tyler-Walters FINAL REPORT October 2008 Reference: Langmead, O., Jackson, E., Lear, D., Evans, J., Seeley, B. Ellis, R., Mieszkowska, N. and Tyler-Walters, H. (2008). The Review of Biodiversity for Marine Spatial Planning within the Firth of Clyde. Report to the SSMEI Clyde Pilot from the Marine Life Information Network (MarLIN). Plymouth: Marine Biological Association of the United Kingdom. [Contract number R70073PUR] 1 Firth of Clyde Biodiversity Review 2 Firth of Clyde Biodiversity Review Contents Executive summary................................................................................11 1. Introduction...................................................................................15 1.1 Marine Spatial Planning................................................................15 1.1.1 Ecosystem Approach..............................................................15 1.1.2 Recording the Current Situation ................................................16 1.1.3 National and International obligations and policy drivers..................16 1.2 Scottish Sustainable Marine Environment Initiative...............................17 1.2.1 SSMEI Clyde Pilot ..................................................................17
    [Show full text]
  • Intraspecific Variations of Bioluminescence in Amphipholis
    mar. biol. Ass. U.K. (1997), 77,1213-1222 1213 Printed in Great Britain INTRASPECIFIC VARIATIONS OF BIOLUMINESCENCE IN A POLYCHROMATIC POPULATION OF AMPHIPHOLIS SQUAMATA (ECHINODERMATA: OPHIUROIDEA) D. DEHEYN*, ƒ. M A LL E FE T + AND M. JANGOUX** ^Laboratoire de Biologie Marine (CP 160/15), Université Libre de Bruxelles, 50 Avenue F.D. Roosevelt, B-1050 Bruxelles, Belgium, laboratoire de Physiologie Animale, Université Catholique de Louvain, 5 Place Croix du Sud, B-1348 Louvain-la-Neuve, Belgium. * Labora to ire de Biologie Marine, Université de Mons-Hainaut, 19 Avenue Mais tria u, B-7D00 M ons, Belgium Six colour varieties were recognized in an intertidal population of Amphipholis squamata from Normandy (France). Each variety exhibits its own capacity to produce light, the light emitted by the most luminous variety being 500 times more intense than that emitted by the least luminous one. Differences in luminescent capabilities observed between varieties do not seem to be due to differences in pigmentation or to be of exogenous origin. It was shown that the capability to produce light changes according to whether individuals are brooding or not, brooding individuals emitting a more intense light than non-brooding ones. This supports the defensive use of luminescence generally associated to ophiuroid production of light. However, light capabilities differ so much between A. squamata colour varieties that bioluminescence could also be associated with another role in the species. INTRODUCTION Luminescent echinoderms have been known for almost two centuries (Viviani, 1805). They belong to four of the five extant classes of the phylum as no luminescent echinoid species have ever been described (Herring, 1987).
    [Show full text]