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MARINE FAUNA and FLORA of BERMUDA a Systematic Guide to the Identification of Marine Organisms
MARINE FAUNA AND FLORA OF BERMUDA A Systematic Guide to the Identification of Marine Organisms Edited by WOLFGANG STERRER Bermuda Biological Station St. George's, Bermuda in cooperation with Christiane Schoepfer-Sterrer and 63 text contributors A Wiley-Interscience Publication JOHN WILEY & SONS New York Chichester Brisbane Toronto Singapore ANTHOZOA 159 sucker) on the exumbrella. Color vari many Actiniaria and Ceriantharia can able, mostly greenish gray-blue, the move if exposed to unfavorable condi greenish color due to zooxanthellae tions. Actiniaria can creep along on their embedded in the mesoglea. Polyp pedal discs at 8-10 cm/hr, pull themselves slender; strobilation of the monodisc by their tentacles, move by peristalsis type. Medusae are found, upside through loose sediment, float in currents, down and usually in large congrega and even swim by coordinated tentacular tions, on the muddy bottoms of in motion. shore bays and ponds. Both subclasses are represented in Ber W. STERRER muda. Because the orders are so diverse morphologically, they are often discussed separately. In some classifications the an Class Anthozoa (Corals, anemones) thozoan orders are grouped into 3 (not the 2 considered here) subclasses, splitting off CHARACTERISTICS: Exclusively polypoid, sol the Ceriantharia and Antipatharia into a itary or colonial eNIDARIA. Oral end ex separate subclass, the Ceriantipatharia. panded into oral disc which bears the mouth and Corallimorpharia are sometimes consid one or more rings of hollow tentacles. ered a suborder of Scleractinia. Approxi Stomodeum well developed, often with 1 or 2 mately 6,500 species of Anthozoa are siphonoglyphs. Gastrovascular cavity compart known. Of 93 species reported from Ber mentalized by radially arranged mesenteries. -
Resultados - Capítulo 2 120
Resultados - Capítulo 2 120 Resultados - Capítulo 2 121 Figure 32 – Electrophysiological screening of BcsTx1 (0.5 µM) on several cloned voltage–gated potassium channel isoforms belonging to different subfamilies. Representative traces under control and after application of 0.5 µM of BcsTx1 are shown. The asterisk indicates steady-state current traces after toxin application. The dotted line indicates the zero-current level. This screening shows that BcsTx1 selectively blocks KV1.x channels at a concentration of 0.5 µM. Resultados - Capítulo 2 122 Resultados - Capítulo 2 123 Figure 33 – Inhibitory effects of BcsTx2 (3 µM) on 12 voltage-gated potassium channels isoforms expressed in X. laevis oocytes. Representative whole-cell current traces in the absence and in the presence of 3 µM BcsTx2 are shown for each channel. The dotted line indicates the zero-current level. The * indicates steady state current traces after application of 3 µM BcsTx2. This screening carried out on a large number of KV channel isoforms belonging to different subfamilies shows that BcsTx2 selectively blocks Shaker channels subfamily. In order to characterize the potency and selectivity profile, concentration- response curves were constructed for BcsTx1. IC50 values yielded 405 ± 20.56 nanomolar (nM) for rKv1.1, 0.03 ± 0.006 nM for rKv1.2, 74.11 ± 20.24 nM for hKv1.3, 1.31 ± 0.20 nM for rKv1.6 and 247.69 ± 95.97 nM for Shaker IR (Figure 34A and Table 7). A concentration–response curve was also constructed to determine the concentration at which BcsTx2 blocked half of the channels. The IC50 values calculated are 14.42 ± 2.61 nM for rKV1.1, 80.40 ± 1.44 nM for rKV1.2, 13.12 ± 3.29 nM for hKV1.3, 7.76 ± 1.90 nM for rKV1.6, and 49.14 ± 3.44 nM for Shaker IR (Figure 34B and Table 7). -
Asexual Reproduction and Molecular Systematics of the Sea Anemone Anthopleura Krebsi (Actiniaria: Actiniidae)
Rev. Biol. Trop. 51(1): 147-154, 2003 www.ucr.ac.cr www.ots.ac.cr www.ots.duke.edu Asexual reproduction and molecular systematics of the sea anemone Anthopleura krebsi (Actiniaria: Actiniidae) Paula Braga Gomes1, Mauricio Oscar Zamponi2 and Antonio Mateo Solé-Cava3 1. LAMAMEBEN, Departamento de Zoologia-CCB, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego 1235, Cidade Universitária, Recife-Pe, 50670-901, Brazil. [email protected] 2. Laboratorio de Biología de Cnidarios, Depto. Cs. Marinas, FCEyN, Funes, 3250 (7600), Mar del Plata - Argentina. CONICET Research. 3. Molecular Biodiversity Lab. Departamento de Genética, Instituto de Biologia, Bloco A, CCS, Universidade Federal do Rio de Janeiro, Ilha do Fundão, CEP 21941-590, Rio de Janeiro, RJ, Brazil and Port Erin Marine Laboratory, University of Liverpool, Isle of Man, IM9 6JA, UK. Received 26-VI-2001. Corrected 02-V-2002. Accepted 07-III-2003. Abstract: In this paper we use allozyme analyses to demonstrate that individuals in Anthopleura krebsi aggre- gates are monoclonal. Additionally, sympatric samples of the red and the green colour-morphs of A. krebsi from Pernambuco, Brazil were genetically compared and no significant differences were observed between them (gene identity= 0.992), indicating that they do not belong to different biological species. All individuals within aggregates of the green colour-morph were found to be identical over the five polymorphic loci analysed. Such results would be extremely unlikely (P<10-11) if the individuals analysed had been generated through sexual reproduction, thus confirming the presence of asexual reproduction in this species. Key words: Cnidaria, allozymes, clones, fission, molecular systematics. -
Genetic Divergence Between East and West Atlantic Populations of Actinia Spp
Marine Biology (2005) 146: 435–443 DOI 10.1007/s00227-004-1462-z RESEARCH ARTICLE R. Schama Æ A. M. Sole´-Cava Æ J. P. Thorpe Genetic divergence between east and west Atlantic populations of Actinia spp. sea anemones (Cnidaria: Actiniidae) Received: 30 January 2004 / Accepted: 18 August 2004 / Published online: 11 November 2004 Ó Springer-Verlag 2004 Abstract The sea anemone Actinia equina was considered Introduction a highly variable species with a wide geographical dis- tribution, but molecular systematic studies have shown Species boundaries within the phylum Cnidaria are often that this wide distribution may be the result of the difficult to assess because of the small number of diag- lumping of cryptic species. In this work enzyme elec- nostic characters and the large plasticity assumed to trophoresis was used to analyse the genetic variability of occur for many morphological traits. Consequently, A. equina from the Atlantic coasts of Europe and Africa, many morphological variants have been considered to as well as the relationships between those populations belong to the same highly variable species (Perrin et al. and other species of the genus. Samples of A. equina 1999). The sea anemone Actinia equina (Linnaeus, 1758) from the United Kingdom and France were compared is a very good example of over-conservative systematics; with supposedly conspecific populations from South until the 1980s it was considered a highly variable species Africa and a recently described species from Madeira, with a very wide geographic distribution from the cold Actinia nigropunctata. The South African and Madeiran and brackish waters of North Russia (Kola peninsula) populations were genetically very divergent from each and the Baltic Sea to the tropical waters of West Africa other (genetic identity, I=0.15), as well as from the and the Red Sea, South Africa and the Far East (Ste- A. -
The Importance of Fine-Scale Environmental Heterogeneity in Determining Levels of Genotypic Diversity and Local Adaptation
University of Wollongong Thesis Collections University of Wollongong Thesis Collection University of Wollongong Year The importance of fine-scale environmental heterogeneity in determining levels of genotypic diversity and local adaptation Craig D. H Sherman University of Wollongong Sherman, Craig D. H, The importance of fine-scale environmental heterogeneity in deter- mining levels of genotypic diversity and local adaptation, PhD thesis, School of Biological Sciences, University of Wollongong, 2006. http://ro.uow.edu.au/theses/505 This paper is posted at Research Online. http://ro.uow.edu.au/theses/505 The Importance of Fine-Scale Environmental Heterogeneity in Determining Levels of Genotypic Diversity and Local Adaptation A thesis submitted in fulfilment of the requirements for the award of the degree DOCTOR OF PHILOSOPHY from the UNIVERSITY OF WOLLONGONG by Craig D. H. Sherman B. Sc. (Hons) SCHOOL OF BIOLOGICAL SCIENCES 2006 The intertidal sea anemone Actinia tenebrosa. Photograph by A.M Martin Certification I, Craig D. H. Sherman, declare that this thesis, submitted in fulfilment of the requirements for the award of Doctor of Philosophy, in the School of Biological Sciences, University of Wollongong, is wholly my own work unless otherwise referenced or acknowledged. The document has not been submitted for qualifications at any other academic institution. Craig Sherman 13 January 2005 Table of contents Table of Contents List of Tables .................................................................................................................. -
Sobre Anêmonas-Do-Mar (Actiniaria) Bo Brasil
Bol. Zool. e Biol. Mar., N.S., n.° 30, pp. 457-468, São Paulo, 1973 SOBRE ANÊMONAS-DO-MAR (ACTINIARIA) BO BRASIL DIVA DINIZ CORRÊA Departamento de Zoologia do Instituto de Biociências da Universidade de São Paulo — Caixa Postal, 20.520 —■ São Paulo — Brasil. RESUMO Este trabalho apresenta uma descrição sumária de 5 espécies de anê- monas-do-mar ainda não conhecidas para a costa brasileira. São elas: Lebrunia danae (Duchassaing & Michelotti, 1860), de Pernambuco, Lebrunia coralligens (Wilson, 1890), da Bahia, Condylactis gigantea (Weinland, 1860), da Bahia, Homostichanthus ãuerdeni Carlgren, 1900, de Espírito Santo e Alicia mirabilis Johnson, 1861, de Pernambuco. ON SEA ANEMONES (ACTINIARIA) FROM BRAZIL ABSTRACT In a first paper, Corrêa (1964) described 10 species of sea ane mones from Brazil, mainly from the coast of São Paulo. Only one of them, Calliactis tricolor (Lesueur, 1817), is mentioned to occur in Ceará State, Northeastern coast of Brazil. Later on, one more spe cies, Actinoporus elegans Duchassaing, 1850, also from São Paulo coast, was described (Corrêa, in press). Of the eleven species included in both papers, six are mostly known from Caribbean waters. Four of the five species described here, Lebrunia danae (Duchas saing & Michelotti, 1860), Lebrunia coralligens (Wilson, 1890), Condy lactis gigantea (Weinland, I860), and Homostichanthus ãuerdeni Carlgren, 1900, are known for Caribbean waters also, now collected in Pernambuco (one species), Bahia (two species) and Espírito Santo (one species). The fifth species, Alicia mirabilis Johnson, 1861, already known from Madeira Island, was found in Pernambuco. INTRODUÇÃO Na sua revisão sistemática das três Ordens de anêmonas-do-mar, Ptichodactiaria, Corallimorpharia e Actiniaria, Carlgren (1949) men ciona apenas 4 espécies da última Ordem conhecidas para o Brasil. -
Reproduction of Cnidaria1
Color profile: Disabled Composite Default screen 1735 REVIEW/SYNTHÈSE Reproduction of Cnidaria1 Daphne Gail Fautin Abstract: Empirical and experimental data on cnidarian reproduction show it to be more variable than had been thought, and many patterns that had previously been deduced hold up poorly or not at all in light of additional data. The border between sexual and asexual reproduction appears to be faint. This may be due to analytical tools being in- sufficiently powerful to distinguish between the two, but it may be that a distinction between sexual and asexual repro- duction is not very important biologically to cnidarians. Given the variety of modes by which it is now evident that asexual reproduction occurs, its ecological and evolutionary implications have probably been underestimated. Appropri- ate analytical frameworks and strategies must be developed for these morphologically simple animals, in which sexual reproduction may not be paramount, that during one lifetime may pass though two or more phases differing radically in morphology and ecology, that may hybridize, that are potentially extremely long-lived, and that may transmit through both sexual and asexual reproduction mutations arising in somatic tissue. In cnidarians, perhaps more than in any other phylum, reproductive attributes have been used to define taxa, but they do so at a variety of levels and not necessarily in the way they have conventionally been considered. At the species level, in Scleractinia, in which these features have been most studied, taxa defined on the basis of morphology, sexual reproduction, and molecular charac- ters may not coincide; there are insufficient data to determine if this is true throughout the phylum. -
Animal Chlorophyll: Its Relation to Haemo- Globin and to Other Animal Pigments
Animal Chlorophyll: its Relation to Haemo- globin and to other Animal Pigments. (Contribution from the Bennuda Biological Station for Research, No. 132). By John F. Fulton, Jr., Magdalen College, Oxford. CONTENTS. PART I. THE PIGMENTS OF ANIMALS HAVING NO BLOOD-VASCULAR SYSTEM. PAGE 1. INTRODUCTION ......... 340 2. PROTOZOA AND PORIFERA ....... 341 3. COELENTERATA ......... 344 (rt)Condylactispassiflora. 345 (6) Actinia bermudensis ...... 347 4. PLATYHELMINTHES ........ 353 5. ECHINODERMATA ......... 355 (a) Tripneustes esculentus. ..... 355 (6) Other Echinodermata 358 PART II. THE PIGMENTS OF ANIMALS WHICH HAVE A BLOOD-VASCULAR SYSTEM. 1. INTRODUCTION ......... 360 2. NEMERTINA ......... 360 3. MOLLUSCA 361 (a) The Opisthobranchs 361 (6) The Cephalopods 362 (c) Other Mollusca 363 4. ANNELIDA .......... 364 5. ARTHROPODA ......... 368 (a) Crustacea 368 (&) Insecta 374 6. TUNICATA 376 (ra)Ascidia atra ........ 376 (6) Other tunicates . ' . 379 (c) Discussion ......... 379 7. DISCUSSION—PIGMENTATION or VERTEBRATES .... 380 8. CONCLUSIONS ......... 382 0. BIBLIOGRAPHY ,,,.,,,,, 385 340 JOHN F. FULTON.. JR. PAET I. THE PIGMENTS OP ANIMALS HAVING NO BLOOD-VASCULAR SYSTEM. 1. INTRODUCTION. IN the study of marine invertebrates one of the most impres- sive things encountered is the great richness and variety of colour ; it is not surprising, therefore, that the question of animal coloration has long engaged great attention. Investi- gated at first superficially by those who sought an explanation of the so-called phenomenon of ' protective coloration ', the problem attracted, during the latter part of the nineteenth century, the attention of several English physiologists, and it is to the investigators of this group—Lankester, Sorby, Mac- Munn, Mosley, Griffiths, Poulton, and Halliburton are the more important names—that we are indebted for very real contribu- tions to our knowledge of animal pigments ; especially for the introduction of the microspectroscope into this field of biological research. -
Longitudinal Fission in Actinia Bermudensis Verrilli A
AUTHOR'S ARSTRAIX OF THIS PAPER ISjUED BY THE BIRLIOGRAPHlC SERVICE. MAY 4 LONGITUDINAL FISSION IN ACTINIA BERMUDENSIS VERRILLI A. C. WALTON Bermuda Biological Station for Research EIGHT FIGURES Longitudinal fission has long been recognized as a normal means of non-sexual reproduction among sea anemones. McCrady ( '58)2 observed aboral-oral fission in Actinia cavernosa, and G. C. Davenport ('03) observed similar phenomena in Sagartia luciae. In these cases fission was by constriction, followed by rupture. Carlgren ('93) in Protanthea simplex, and Torrey ('98) in Metridium found an aboral-oral fission by constriction without rupture. Mrs. Thynne ('59) observed a side-to-side fission accompanied by rupture in the case of Cyanthina smithi. Torrey and Mery ('04) show that all three of the above methods are normally found in Sagartia davisi, with the plane of divi- sion running perpendicular to the long axis of the mouth. It is especially in Metridium that the double condition has been observed. Two-headed specimens had been noted as early as 1775 (Dicquemare). Johnston ('47) stated his belief that these conditions were due to the coalescence of two separate individiials; but Gosse ('60) contended that such individuals owed their existence to spontaneous division. Foot ('63) re- corded the discovery of a specimen having two mouths on one oral disc, but expressed no opinion as to the cause. Carlgren ('93), like Gosse, contended that such forms were stages in a 1 Contributions from the Bermuda Biological Station for Research, No. 87. 2 For further literature see the following papers of Parker and Carlgren. Parker, G. -
Rocky Coasts Book.Indb
Rocky Coasts (Second Edition) Project Nature Field Study Guide Sponsored by The Bermuda Paint Company Limited Rocky Coasts A completely new edition of the first Project Nature guide “The Rocky Coast” published in 1993 Published by the Bermuda Zoological Society in collaboration with Bermuda Aquarium, Museum & Zoo. Published May 2007 Copyright © 2007 Bermuda Zoological Society Details of other titles available in the Project Nature series are: The Rocky Coast. Anonymous First Edition April 1993. 106 pages. ISBN: 1-894916-04-2 Sandy Coasts, Martin L. H. Thomas First Edition (The Sandy Shore) November 1994 Second Edition May 2008. 102 pages. ISBN: 978-1-897403-49-5 The Bermuda Forests. Anonymous First Edition January 2001 Second Edition March 2002 Third Edition December 2005. 114 pages. ISBN: 1-894916-26-3 Bermuda’s Wetlands. By Martin L. H. Thomas First Edition January 2001 Second Edition March 2002 Third Edition July 2005 Fourth Edition December 2005. 186 pages. ISBN: 1-894916-62-X Oceanic Island Ecology of Bermuda. By Martin L. H. Thomas First Edition February 2002 Second Edition September 2004 Third Edition September 2005. 88 pages. ISBN: 1-894916-63-8 Coral Reefs of Bermuda. By Martin L. H. Thomas First Edition May 2002 Second Edition September 2005. 80 pages. ISBN: 1-894916-67-0 Sheltered Bays and Seagrass Beds of Bermuda. By Martin L. H. Thomas First Edition August 2002 Second Edition September 2005. 88 pages. ISBN: 1-894916-66-2 The Ecology of Harrington Sound, Bermuda. By Martin L. H. Thomas First Edition May 2003 Second Edition September 2005. 96 pages. -
Genetic Evidence for the Asexual Origin of Small Individuals Found in the Coelenteron of the Sea Anemone Actinia Bermudensis Mcmurrich
BULLETIN OF MARINE SCIENCE, 63(2): 257–264, 1998 GENETIC EVIDENCE FOR THE ASEXUAL ORIGIN OF SMALL INDIVIDUALS FOUND IN THE COELENTERON OF THE SEA ANEMONE ACTINIA BERMUDENSIS MCMURRICH Fernando A. Monteiro, Claudia A. M. Russo and Antonio M. Solé-Cava ABSTRACT Some sea anemone species brood small individuals in their coelenteron. This paper studies the genetic relationship between brooding and brooded individuals in the tropical sea anemone, Actinia bermudensis, to verify whether the offspring was produced asexu- ally or not. Horizontal starch gels were stained for 14 enzymes, two of which showed high gel resolution and were polymorphic for some brooding anemones. Those anemo- nes were analyzed again along with their offspring to see whether their genotype was identical to that of the brooding adults. As observed in other species of the genus, a total genotypic agreement was found between brooding and brooded A. bermudensis. The prob- ability of this result occurring by chance if the young were produced sexually was at most 1.1 × 10−35. It was concluded therefore, that the young anemones found in the coelenteron of A. bermudensis are produced asexually. This suggests that asexual brooding may be more common in sea anemone species than it was previously thought. Actinia bermudensis (McMurrich, 1889) is a tropical sea anemone that occurs in the intertidal zone of marine and estuarine rocky shores from Florida (USA) to South Brazil (Schlenz, 1983). Adults of this species often brood small anemones in their coelenteron. There is some controversy over the sexual or asexual origin of the juveniles found inside the coelenteron of many sea anemone species (Chia, 1976; Rostron and Rostron, 1978; Gashout and Ormond, 1979). -
Distribution, Abundance and Adaptations of Three Species of Actiniidae (Cnidaria, Actiniaria) on an Intertidal Beach Rock in Carneiros Beach, Pernambuco, Brazil
Miscel.lania Zoologica 21.2 (1998) 65 Distribution, abundance and adaptations of three species of Actiniidae (Cnidaria, Actiniaria) on an intertidal beach rock in Carneiros beach, Pernambuco, Brazil P. B. Gomes, M. J. Belém & E. Schlenz Gornes, P. B., Belérn, M. J. & Schlenz, E., 1998. Distribution, abundance and adaptations of three species of Actiniidae (Cnidaria, Actiniaria) on an intertidal beach rock in Carneiros beach, Pernarnbuco, Brazil. Misc. Zool., 21.2: 65-72. Distribution, abundance and adaptations of three species of Actiniidae (Cnidaria, Actiniaria) on an intertidal beach rock in Carneiros beach, Pernambuco, Brazi1.- Bunodosoma cangicum Correa in Belém & Preslercravo, 1973; Actinia bermudensis (McMurrich, 1889) and Anthopleura krebsi Duchassaing & Michelotti, 1860 were studied in an intertidal beach rock at Carneiro's beach, Pernambuco, Brazil. According to the environrnental factors five rnicrohabitats occupied by the species were identified. Randorn surveys were made and a framework was used to calculate the mean specific density of each species in the different habitats. Ten specirnens of each species were rneasured. The Mann-Whitneytest was used to compare size and density of B. cangicum frorn different habitats. Specirnens of B. cangicum were found in three different habitats, with the lowest density (1.1 ind/m2) and the lowest size (1.2x3.8 cm, diam x height) in pools on the flats of the beach rock, exposed to the sun and to the rainfall. In this habitat, there was an increase in the ternperature and salinity of water during dry seasons and the species was almost absent during rainy seasons. In habitats 4 and 5, which were more protected, the mean density was 6.0 and 6.4 and the mean size of 4.5x6.3 cm and 5.3x6.4 cm, respectively.