DOCSLIB.ORG

Systematics, Ecology, and Distribution of the Mollusks of Los Roques, Venezueln

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Systematics, Ecology, and Distribution of the Mollusks of Los Roques, Venezueln SYSTEMATICS, ECOLOGY, AND DISTRIBUTION OF THE MOLLUSKS OF LOS ROQUES, VENEZUELN ROBERT C. WORK Institute of Marine and Atmospheric Sciences, University of Miami ABSTRACT One hundred and twenty-five species of mollusks of the Los Roques Archipelago are treated. The habitat and associated fauna of each molluscan assemblage are discussed. An attempt is made to establish accurate geographic ranges for each species. Notes concerning the feed- ing habits of ten species of gastropods are included, and the egg capsules of three species are illustrated. INTRODUCTION This paper is based upon the mollusks collected in Los Roques Islands, Venezuela, during the month of August 1963, at which time the author took part in an expedition initiated and partially supported by the Fundaci6n Cientifica Los Roques under the supervision of Dr. Guillermo Machado of Caracas. The University Central de Venezuela, Harvard University, and the Institute of Marine and Atmospheric Sciences of the University of Miami participated. The base of operations was located on the south island of Dos Mosquises, where the Fundaci6n Cientifica Los Roques maintains comfortable living quarters and laboratory facilities (see inset, Fig. I). An illustrated, popular narrative of the 1963 Los Roques Expedition has been published by de Sylva (1964). The purpose of this paper goes, hopefully, beyond being a simple check list. Through literature research, personal communication with reliable authorities, and personal experience, an attempt has been made to determine the actual ranges of the species listed and the zoogeographic affinities of the Los Roques Archipelago to other regions. It is hoped that the descriptions of the collecting localities will give some idea of the general ecology of some of the species. In the systematic treatment, additional notes pertinent to the ecology of some of the species are included. Information on the feeding habits is given for some species, and the egg capsules of several species are figured. This list of species is unquestionably far from being complete. However, only through many such incomplete lists compiled by interested investigators will an ultimate composite understanding of the Caribbean fauna become a reality. 1Contribution No. 1050 from the Institute of Marine and Atmospheric Sciences, University of Miami. This research was supported in part by the Office of Naval Research Grant Nonr-(G)- 0031-64 and was submitted to the faculty of the Graduate School of the University of Miami in partial fulfillment of the requirements for the degree of Master of Science. 1969] Work: Mollusks of Los Roques 615 ACKNOWLEDGMENTS Sincere appreciation is extended to the Fundaci6n Cientifica Los Roques for the financial aid, companionship, and able assistance given by its members: especially Dr. Guillermo Machado, Mr. Francisco Nunez, Mr. and Mrs. William H. Phelps, and Mr. Freddy Behrens. The author is particularly grateful to the United States Office of Naval Research for its support through grant Nonr-( G) -0031-64. With great pleasure the author accepted the friendship and cooperation of the following expedition members from the Universidad Central de Venezuela: Dr. Franz Weibezahn, Mr. Francisco Mago Leccia, Miss Tania Cobo, Mr. Otto Infante, Mr. Jose de Gregario, and Miss Elizabeth Izaguirre. The author owes special thanks to the latter for her particular interest in the collection of invertebrates. In addition, thanks are due to many members of the Venezuelan Navy, especially to Captain Noel Sanchez-Gomez, captain of the Navy vessel "HO-1," which transported expedition members to and from Los Roques; and to Lieutenant Leopoldo Salas-Romer, who was the liaison officer with the Venezuelan Navy and who also helped with the collections. Thanks, of course, are extended to the author's two companions from the University of Miami, Dr. Donald P. de Sylva, ichthyologist and chief sci- entist of our team, and Dr. John M. Greene, who was a graduate student in ichthyology at the time of the expedition. Special thanks are due Dr. Gilbert L. Voss of the Institute of Marine and Atmospheric Sciences for having chosen me to be included among the expedition members. Further appreciation goes to Dr. Voss and Dr. Frederick M. Bayer for encourage- ment and guidance while writing this paper. The author is grateful to the following specialists for assistance with identifying some of the non-molluscan fauna: Dr. Frederick M. Bayer for all alcyonarians, with the exception of a few generic field identifications by the author; Dr. Lowell P. Thomas for the greater part of the ophiuroids; Dr. Elisabeth Deichmann for all holothurians, with the exception of the author's field identification of Ludwigothuria mexicana (Ludwig); and Dr. Anthony Provenzano for all pagurids. The author is responsible for the determinations of all of the remaining non-molluscan invertebrates included herein. The following individuals are gratefully acknowledged for specific de- terminations of special groups of mollusks: Drs. Eveline and Ernst Marcus for all opisthobranchs other than Bulla; Mr. Edward T. Laroe for all chitons; and Dr. Gilbert L. Voss and Dr. Richard Young for all cephalo- pods. For the loan of specimens of Astraea and Laevicardium for comparative purposes, appreciation is given to Mrs. Ellen Crovo; Lt. Col. Corrine Ed- wards, U.S.A.P. (Ret.); Mrs. Louise Futch; and Mrs. Adele Emery. 616 Bulletin of Marine Science [19(3) HISTORICAL RESUME This resume includes literature only for the islands and continental shores of the Caribbean proper, with the exception that the entire Yucatan Peninsula is here considered geographically as Caribbean. By the same token, the northern shores of the Greater Antilles are considered to be part of the Caribbean. One may consult the list of references for pertinent literature concerning the Caribbean fauna in the remainder of the Gulf of Mexico, the southeastern United States, the Bahamas, Bermuda, and the Atlantic coast of South America. Among the very early publications concerning Caribbean mollusks are those of Orbigny (1842, 1853) dealing with the fauna of Cuba, and Adams (1845, 1846, 1850) who listed and described many new species of mollusks from Jamaica. Following these, Beau (1858) published a cata- logue of shells from the island of Guadeloupe, and Krebs (1864) and March (1863, 1875, 1876, 1877) published lists of West Indian marine shells, many from the island of S1. Martin. Coomans (1958) has reviewed the work of Krebs and part of that of March and has brought Krebs' nomenclature up to date. Also during the 19th Century, a number of new Caribbean species were described in brief papers by P. Fischer, H. Crosse, and Bernardi, individually and in various coauthorships, mostly published in the Journal de Conchyliologie. In this century Dall & Simpson (1901) published an important systematic work on the mollusks of Puerto Rico. More recently, Warmke & Abbott (l961) have treated Caribbean mollusks based mainly on collections from Puerto Rico. McLean (1951) treated the pelecypods of Puerto Rico and the Virgin Islands. Many of his Puerto Rican records are based on the above mentioned work of Dall & Simpson. From Playa de Vega Baja, Puerto Rico, Arnow et aZ. (1963) listed and gave notes concerning 224 species of mollusks. For the Virgin Islands, Usticke (1959) has published an annotated checklist of shells at S1. Croix, and Weber (1961) has listed the marine shells of Water Island at S1. Thomas. Aguayo & Jaume (1947-1952) compiled a catalogue of Cuban mol- lusks, but unfortunately it was never officially published. Abbott (1958) has treated ecologically and systematically the mollusks of nearby Grand Cayman. For the islands of the lower Caribbean, publications in this century include Schepman's (1915) work on the Netherlands West Indies and Benthem Jutting's (1927) list of mollusks from the island of Cura<;ao. More recently Coomans (1958) has reviewed the gastropods of the Nether- lands West Indies and other Caribbean islands. This is a good reference for the gastropods of Bonaire, Aruba, and Cura<;ao. Rehder (1962) has published a brief but excellent paper on a small collection of mollusks from Los Rogues and nearby La Orchilla. Rodriguez (1959) included 1969] Work: Mollusks of Los Roques 617 information on the ecology of certain mollusks on Margarita Island. Lewis (1960) discussed some of the mollusks of rocky shores at Barbados and (1965) gave an interesting list of benthic mollusks from that island. Less information is availab]e concerning collections of mollusks from the continental Caribbean coast. Fluck (1900, 1901, 1905) published a series of short articles on the shells of the Caribbean coast of Nicaragua. Weisbord (1926) and Jaume (1946) listed mollusks collected from the Yucatan Peninsula. Olsson & McGinty (1958) published an extensive list of mollusks from the Caribbean coast of Panama. This paper included the descriptions of new genera and species. Weisbord's (1962, 1964) publications on the Cenozoic mollusks of northern Venezuela include some species of the Recent horizon, and Flores (1966) has treated the cassidids of northern Venezuela and the Venezuelan islands. Most recently, Hou- brick (1968) treated the mollusks of the Caribbean coast of Costa Rica. The cephalopods of the Caribbean have been described by Adam (1957), Rees (1950), and in papers by Voss (1955, 1956, 1958) for Cuba, the Bahamas, the southwestern Caribbean and numerous individual localities. PHYSICAL SETTING The archipelago of Los Roques is located about 120 kilometers north of the coast of Venezuela. Rough]y, the chain of islands forms a rectangle with an east-west dimension of 36.6 kilometers and a north-south dimension of 24.6 kilometers. The extremes of the boundaries are between 110 44' 45" and 110 58' 36" North latitude and between 660 32' 4" and 660 52' 27" East longitude. The south-central portion is occupied by a very large, shallow lagoonal area with a depth of about 1 to 1.5 meters. It is around this lagoon that the 42 islands, and more than 250 sandbanks and reefs, are situated.
Load more

Recommended publications
  • A New Approach to an Old Conundrumdna Barcoding Sheds
    Molecular Ecology Resources (2010) doi: 10.1111/j.1755-0998.2010.02937.x DNA BARCODING A new approach to an old conundrum—DNA barcoding sheds new light on phenotypic plasticity and morphological stasis in microsnails (Gastropoda, Pulmonata, Carychiidae) ALEXANDER M. WEIGAND,* ADRIENNE JOCHUM,* MARKUS PFENNINGER,† DIRK STEINKE‡ and ANNETTE KLUSSMANN-KOLB*,† *Institute for Ecology, Evolution and Diversity, Siesmayerstrasse 70, Goethe-University, 60323 Frankfurt am Main, Germany, †Research Centre Biodiversity and Climate, Siesmayerstrasse 70, 60323 Frankfurt am Main, Germany, ‡Biodiversity Institute of Ontario, University of Guelph, 50 Stone Road West, Guelph, ON N1G 2V7, Canada Abstract The identification of microsnail taxa based on morphological characters is often a time-consuming and inconclusive process. Aspects such as morphological stasis and phenotypic plasticity further complicate their taxonomic designation. In this study, we demonstrate that the application of DNA barcoding can alleviate these problems within the Carychiidae (Gastro- poda, Pulmonata). These microsnails are a taxon of the pulmonate lineage and most likely migrated onto land indepen- dently of the Stylommatophora clade. Their taxonomical classification is currently based on conchological and anatomical characters only. Despite much confusion about historic species assignments, the Carychiidae can be unambiguously subdi- vided into two taxa: (i) Zospeum species, which are restricted to karst caves, and (ii) Carychium species, which occur in a broad range of environmental conditions. The implementation of discrete molecular data (COI marker) enabled us to cor- rectly designate 90% of the carychiid microsnails. The remaining cases were probably cryptic Zospeum and Carychium taxa and incipient species, which require further investigation into their species status. Because conventional reliance upon mostly continuous (i.e.
    [Show full text]
  • (Rhizophoraceae) En Isla Larga, Bahía De Mochima, Venezuela Revista De Biología Tropical, Vol
    Revista de Biología Tropical ISSN: 0034-7744 [email protected] Universidad de Costa Rica Costa Rica Acosta Balbas, Vanessa; Betancourt Tineo, Rafael; Prieto Arcas, Antulio Estructura comunitaria de bivalvos y gasterópodos en raíces del mangle rojo Rhizophora mangle (Rhizophoraceae) en isla Larga, bahía de Mochima, Venezuela Revista de Biología Tropical, vol. 62, núm. 2, junio-, 2014, pp. 551-565 Universidad de Costa Rica San Pedro de Montes de Oca, Costa Rica Disponible en: http://www.redalyc.org/articulo.oa?id=44931383012 Cómo citar el artículo Número completo Sistema de Información Científica Más información del artículo Red de Revistas Científicas de América Latina, el Caribe, España y Portugal Página de la revista en redalyc.org Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto Estructura comunitaria de bivalvos y gasterópodos en raíces del mangle rojo Rhizophora mangle (Rhizophoraceae) en isla Larga, bahía de Mochima, Venezuela Vanessa Acosta Balbas, Rafael Betancourt Tineo & Antulio Prieto Arcas Departamento de Biología, Escuela de Ciencias, Universidad de Oriente. Aptdo. 245; Cumaná, 6101. Estado Sucre, Venezuela; [email protected], [email protected], [email protected] Recibido 18-IX-2012. Corregido 10-III-2013. Aceptado 05-IV-2013. Abstract: Community structure of bivalves and gastropods in roots of red mangrove Rhizophora mangle (Rhizophoraceae) in isla Larga, Mochima Bay, Venezuela. The Rhizophora mangle roots form a complex ecosystem where a wide range of organisms are permanently established, reproduce, and find refuge. In this study, we assessed the diversity of bivalves and gastropods that inhabit red mangrove roots, in isla Larga, Mochima, Venezuela Sucre state.
    [Show full text]
  • Tampa Bay Benthic Monitoring Program: Status of Middle Tampa Bay: 1993-1998
    Tampa Bay Benthic Monitoring Program: Status of Middle Tampa Bay: 1993-1998 Stephen A. Grabe Environmental Supervisor David J. Karlen Environmental Scientist II Christina M. Holden Environmental Scientist I Barbara Goetting Environmental Specialist I Thomas Dix Environmental Scientist II MARCH 2003 1 Environmental Protection Commission of Hillsborough County Richard Garrity, Ph.D. Executive Director Gerold Morrison, Ph.D. Director, Environmental Resources Management Division 2 INTRODUCTION The Environmental Protection Commission of Hillsborough County (EPCHC) has been collecting samples in Middle Tampa Bay 1993 as part of the bay-wide benthic monitoring program developed to (Tampa Bay National Estuary Program 1996). The original objectives of this program were to discern the ―health‖—or ―status‖-- of the bay’s sediments by developing a Benthic Index for Tampa Bay as well as evaluating sediment quality by means of Sediment Quality Assessment Guidelines (SQAGs). The Tampa Bay Estuary Program provided partial support for this monitoring. This report summarizes data collected during 1993-1998 from the Middle Tampa Bay segment of Tampa Bay. 3 METHODS Field Collection and Laboratory Procedures: A total of 127 stations (20 to 24 per year) were sampled during late summer/early fall ―Index Period‖ 1993-1998 (Appendix A). Sample locations were randomly selected from computer- generated coordinates. Benthic samples were collected using a Young grab sampler following the field protocols outlined in Courtney et al. (1993). Laboratory procedures followed the protocols set forth in Courtney et al. (1995). Data Analysis: Species richness, Shannon-Wiener diversity, and Evenness were calculated using PISCES Conservation Ltd.’s (2001) ―Species Diversity and Richness II‖ software.
    [Show full text]
  • Preliminary Checklist of Extant Endemic Species and Subspecies of the Windward Dutch Caribbean (St
    Preliminary checklist of extant endemic species and subspecies of the windward Dutch Caribbean (St. Martin, St. Eustatius, Saba and the Saba Bank) Authors: O.G. Bos, P.A.J. Bakker, R.J.H.G. Henkens, J. A. de Freitas, A.O. Debrot Wageningen University & Research rapport C067/18 Preliminary checklist of extant endemic species and subspecies of the windward Dutch Caribbean (St. Martin, St. Eustatius, Saba and the Saba Bank) Authors: O.G. Bos1, P.A.J. Bakker2, R.J.H.G. Henkens3, J. A. de Freitas4, A.O. Debrot1 1. Wageningen Marine Research 2. Naturalis Biodiversity Center 3. Wageningen Environmental Research 4. Carmabi Publication date: 18 October 2018 This research project was carried out by Wageningen Marine Research at the request of and with funding from the Ministry of Agriculture, Nature and Food Quality for the purposes of Policy Support Research Theme ‘Caribbean Netherlands' (project no. BO-43-021.04-012). Wageningen Marine Research Den Helder, October 2018 CONFIDENTIAL no Wageningen Marine Research report C067/18 Bos OG, Bakker PAJ, Henkens RJHG, De Freitas JA, Debrot AO (2018). Preliminary checklist of extant endemic species of St. Martin, St. Eustatius, Saba and Saba Bank. Wageningen, Wageningen Marine Research (University & Research centre), Wageningen Marine Research report C067/18 Keywords: endemic species, Caribbean, Saba, Saint Eustatius, Saint Marten, Saba Bank Cover photo: endemic Anolis schwartzi in de Quill crater, St Eustatius (photo: A.O. Debrot) Date: 18 th of October 2018 Client: Ministry of LNV Attn.: H. Haanstra PO Box 20401 2500 EK The Hague The Netherlands BAS code BO-43-021.04-012 (KD-2018-055) This report can be downloaded for free from https://doi.org/10.18174/460388 Wageningen Marine Research provides no printed copies of reports Wageningen Marine Research is ISO 9001:2008 certified.
    [Show full text]
  • Marine Biological Investigations in the Bahamas 23. Description of the Littoral Zonation at Nine Bahamian Rocky-Shore Localities
    Marine biological investigations in the Bahamas 23. Description of the littoral zonation at nine Bahamian rocky-shore localities Hans Brattström Brattström H. 1999. Description of the littoral zonation at nine Bahamian rocky-shore localities. SARSIA Sarsia 84:319-365. Nine typical, more or less vertical, rocky-shore localities were visited in April-May 1967, and one of these was revisited in March 1968. The topographies of the stations are described and illustrated, and the vertical zonation of their flora and fauna is documented. On the whole the flora and fauna at the stations investigated was fairly poor. At least 37 species of algae and 85 animal species were recorded, but only 15 algae and 71 animals could be identified to species. Most of the algae were too undeveloped or grazed down to permit a reliable identification. Only half as many species were found at these nine stations as were found on three almost horizontal beach-rock stations described in an earlier article. Whereas many of the latter lived in a system of cavities below the rocks, all species found on the nine vertical stations were exposed to waves and the hot midday sun. The common yellow, black, grey, and white zones typical of the Bahamas, were often well-devel- oped. Some algae and many of the animals formed distinct belts within these zones, the higher up the more exposed the rocks were. Though tides and exposure presumably are responsible for the general zonation pattern, it is likely that in the cirripeds and vermetids the way of food-intake determines their upper limit.
    [Show full text]
  • The Marine and Brackish Water Mollusca of the State of Mississippi
    Gulf and Caribbean Research Volume 1 Issue 1 January 1961 The Marine and Brackish Water Mollusca of the State of Mississippi Donald R. Moore Gulf Coast Research Laboratory Follow this and additional works at: https://aquila.usm.edu/gcr Recommended Citation Moore, D. R. 1961. The Marine and Brackish Water Mollusca of the State of Mississippi. Gulf Research Reports 1 (1): 1-58. Retrieved from https://aquila.usm.edu/gcr/vol1/iss1/1 DOI: https://doi.org/10.18785/grr.0101.01 This Article is brought to you for free and open access by The Aquila Digital Community. It has been accepted for inclusion in Gulf and Caribbean Research by an authorized editor of The Aquila Digital Community. For more information, please contact [email protected]. Gulf Research Reports Volume 1, Number 1 Ocean Springs, Mississippi April, 1961 A JOURNAL DEVOTED PRIMARILY TO PUBLICATION OF THE DATA OF THE MARINE SCIENCES, CHIEFLY OF THE GULF OF MEXICO AND ADJACENT WATERS. GORDON GUNTER, Editor Published by the GULF COAST RESEARCH LABORATORY Ocean Springs, Mississippi SHAUGHNESSY PRINTING CO.. EILOXI, MISS. 0 U c x 41 f 4 21 3 a THE MARINE AND BRACKISH WATER MOLLUSCA of the STATE OF MISSISSIPPI Donald R. Moore GULF COAST RESEARCH LABORATORY and DEPARTMENT OF BIOLOGY, MISSISSIPPI SOUTHERN COLLEGE I -1- TABLE OF CONTENTS Introduction ............................................... Page 3 Historical Account ........................................ Page 3 Procedure of Work ....................................... Page 4 Description of the Mississippi Coast ....................... Page 5 The Physical Environment ................................ Page '7 List of Mississippi Marine and Brackish Water Mollusca . Page 11 Discussion of Species ...................................... Page 17 Supplementary Note .....................................
    [Show full text]
  • (Approx) Mixed Micro Shells (22G Bags) Philippines € 10,00 £8,64 $11,69 Each 22G Bag Provides Hours of Fun; Some Interesting Foraminifera Also Included
    Special Price £ US$ Family Genus, species Country Quality Size Remarks w/o Photo Date added Category characteristic (€) (approx) (approx) Mixed micro shells (22g bags) Philippines € 10,00 £8,64 $11,69 Each 22g bag provides hours of fun; some interesting Foraminifera also included. 17/06/21 Mixed micro shells Ischnochitonidae Callistochiton pulchrior Panama F+++ 89mm € 1,80 £1,55 $2,10 21/12/16 Polyplacophora Ischnochitonidae Chaetopleura lurida Panama F+++ 2022mm € 3,00 £2,59 $3,51 Hairy girdles, beautifully preserved. Web 24/12/16 Polyplacophora Ischnochitonidae Ischnochiton textilis South Africa F+++ 30mm+ € 4,00 £3,45 $4,68 30/04/21 Polyplacophora Ischnochitonidae Ischnochiton textilis South Africa F+++ 27.9mm € 2,80 £2,42 $3,27 30/04/21 Polyplacophora Ischnochitonidae Stenoplax limaciformis Panama F+++ 16mm+ € 6,50 £5,61 $7,60 Uncommon. 24/12/16 Polyplacophora Chitonidae Acanthopleura gemmata Philippines F+++ 25mm+ € 2,50 £2,16 $2,92 Hairy margins, beautifully preserved. 04/08/17 Polyplacophora Chitonidae Acanthopleura gemmata Australia F+++ 25mm+ € 2,60 £2,25 $3,04 02/06/18 Polyplacophora Chitonidae Acanthopleura granulata Panama F+++ 41mm+ € 4,00 £3,45 $4,68 West Indian 'fuzzy' chiton. Web 24/12/16 Polyplacophora Chitonidae Acanthopleura granulata Panama F+++ 32mm+ € 3,00 £2,59 $3,51 West Indian 'fuzzy' chiton. 24/12/16 Polyplacophora Chitonidae Chiton tuberculatus Panama F+++ 44mm+ € 5,00 £4,32 $5,85 Caribbean. 24/12/16 Polyplacophora Chitonidae Chiton tuberculatus Panama F++ 35mm € 2,50 £2,16 $2,92 Caribbean. 24/12/16 Polyplacophora Chitonidae Chiton tuberculatus Panama F+++ 29mm+ € 3,00 £2,59 $3,51 Caribbean.
    [Show full text]
  • Malacofauna Marina Del Parque Nacional “Los Caimanes”, Villa Clara, Cuba
    Tesis de Diploma Malacofauna Marina del Parque Nacional “Los Caimanes”, Villa Clara, Cuba. Autora: Liliana Olga Quesada Pérez Junio, 2011 Universidad Central “Marta Abreu” de Las Villas Facultad Ciencias Agropecuaria TESIS DE DIPLOMA Malacofauna marina del Parque Nacional “Los Caimanes”, Villa Clara, Cuba. Autora: Liliana Olga Quesada Pérez Tutor: M. C. Ángel Quirós Espinosa Investigador Auxiliar y Profesor Auxiliar [email protected] Centro de Estudios y Servicios Ambientales, CITMA-Villa Clara Carretera Central 716, Santa Clara Consultante: Dr.C. José Espinosa Sáez Investigador Titular Instituto de Oceanología Junio, 2011 Pensamiento “La diferencia entre una mala observación y una buena, es que la primera es errónea y la segunda es incompleta.” Van Hise Dedicatoria Dedicatoria: A mis padres, a Yandy y a mi familia: por las innumerables razones que me dan para vivir, y por ser fuente de inspiración para mis metas. Agradecimientos Agradecimientos: Muchos son los que de alguna forma contribuyeron a la realización de este trabajo, todos saben cuánto les agradezco: Primero quiero agradecer a mis padres, que aunque no estén presentes sé que de una forma u otra siempre estuvieron allí para darme todo su amor y apoyo. A mi familia en general: a mi abuela, hermano, a mis tíos por toda su ayuda y comprensión. A Yandy y a su familia que han estado allí frente a mis dificultades. Agradecer a mi tutor el M.Sc. Ángel Quirós, a mi consultante el Dr.C. José Espinosa y a la Dra.C. María Elena, por su dedicación para el logro de esta tesis. A mis compañeros de grupo por estos cinco años que hemos compartidos juntos, que para mí fueron inolvidables.
    [Show full text]
  • ABSTRACT Title of Dissertation: PATTERNS IN
    ABSTRACT Title of Dissertation: PATTERNS IN DIVERSITY AND DISTRIBUTION OF BENTHIC MOLLUSCS ALONG A DEPTH GRADIENT IN THE BAHAMAS Michael Joseph Dowgiallo, Doctor of Philosophy, 2004 Dissertation directed by: Professor Marjorie L. Reaka-Kudla Department of Biology, UMCP Species richness and abundance of benthic bivalve and gastropod molluscs was determined over a depth gradient of 5 - 244 m at Lee Stocking Island, Bahamas by deploying replicate benthic collectors at five sites at 5 m, 14 m, 46 m, 153 m, and 244 m for six months beginning in December 1993. A total of 773 individual molluscs comprising at least 72 taxa were retrieved from the collectors. Analysis of the molluscan fauna that colonized the collectors showed overwhelmingly higher abundance and diversity at the 5 m, 14 m, and 46 m sites as compared to the deeper sites at 153 m and 244 m. Irradiance, temperature, and habitat heterogeneity all declined with depth, coincident with declines in the abundance and diversity of the molluscs. Herbivorous modes of feeding predominated (52%) and carnivorous modes of feeding were common (44%) over the range of depths studied at Lee Stocking Island, but mode of feeding did not change significantly over depth. One bivalve and one gastropod species showed a significant decline in body size with increasing depth. Analysis of data for 960 species of gastropod molluscs from the Western Atlantic Gastropod Database of the Academy of Natural Sciences (ANS) that have ranges including the Bahamas showed a positive correlation between body size of species of gastropods and their geographic ranges. There was also a positive correlation between depth range and the size of the geographic range.
    [Show full text]
  • A Lost Species of Salt Marsh Snail: Blauneria Gracilis Pease, 1860
    Published online: 23 April 2018 ISSN (online): 2376-3191 Records of the Hawaii Biological Survey for 2017. Edited by Neal L. Evenhuis. Bishop Museum Occasional Papers 123: 11 –17 (2018) A Lost Species of Salt Marsh Snail : Blauneria gracilis Pease , 1860 (Gastropoda : Ellobiidae) in the Hawaiian Islands 1 CARL C. C HRIStENSEN 2 Bishop Museum, 1525 Bernice Street, Honolulu, Hawai ‘i 96817-2704, USA; email: [email protected] INTRODUCTION Blauneria gracilis Pease, 1860 was described from the “Sandwich Islands” ( i.e. , the Hawaiian Islands) without more precise locality; its author later commented on the living animal and the habitat preferences of the species (Pease 1860, 1869). Kay (1979: 493) stated that the species “has not been recorded since its original description” and there are no known observations of living B. gracilis in the Hawaiian Islands since the mid-19th century. there are, however, several recent finds of dead shells of this species, mostly from archaeological contexts. Athens et al . (1994) and Cowie et al. (1995) recorded a single specimen from an archaeological site on O‘ahu, collected in 1993, and Cowie et al . (1995) briefly reported another specimen from Moloka‘i, also from an archaeological excavation, collected in 1982. Severns (2011: 424, pl. 193, fig. 6 [not fig. 5 as stated in caption]) illustrated a specimen found in beach drift at Hana, Maui. this note provides additional information on the O‘ahu and Moloka‘i records cited by Cowie et al . (1995), reports two additional records from archaeological sites on O‘ahu, reviews available information on the ecology of B.
    [Show full text]
  • 24 Relationships Within the Ellobiidae
    Origin atld evoltctiorzai-y radiatiotz of the Mollrisca (ed. J. Taylor) pp. 285-294, Oxford University Press. O The Malacological Sociery of London 1996 R. Clarke. 24 paleozoic .ine sna~ls. RELATIONSHIPS WITHIN THE ELLOBIIDAE ANTONIO M. DE FRIAS MARTINS Departamento de Biologia, Universidade dos Aqores, P-9502 Porzta Delgada, S6o Miguel, Agores, Portugal ssification , MusCum r Curie. INTRODUCTION complex, and an assessment is made of its relevance in :eny and phylogenetic relationships. 'ulmonata: The Ellobiidae are a group of primitive pulmonate gastropods, Although not treated in this paper, conchological features (apertural dentition, inner whorl resorption and protoconch) . in press. predominantly tropical. Mostly halophilic, they live above the 28s rRNA high-tide mark on mangrove regions, salt-marshes and rolled- and radular morphology were studied also and reference to ~t limpets stone shores. One subfamily, the Carychiinae, is terrestrial, them will be made in the Discussion. inhabiting the forest leaf-litter on mountains throughout ago1 from the world. MATERIAL AND METHODS 'finities of The Ellobiidae were elevated to family rank by Lamarck (1809) under the vernacular name "Les AuriculacCes", The anatomy of 35 species representing 19 genera was ~Ctiquedu properly latinized to Auriculidae by Gray (1840). Odhner studied (Table 24.1). )llusques). (1925), in a revision of the systematics of the family, preferred For the most part the animals were immersed directly in sciences, H. and A. Adarns' name Ellobiidae (in Pfeiffer, 1854). which 70% ethanol. Some were relaxed overnight in isotonic MgCl, ochemical has been in general use since that time. and then preserved in 70% ethanol. A reduced number of Grouping of the increasingly growing number of genera in specimens of most species was fixed in Bouin's, serially Gebriider the family was based mostly on conchological characters.
    [Show full text]
  • Before Albany
    Before Albany THE UNIVERSITY OF THE STATE OF NEW YORK Regents of the University ROBERT M. BENNETT, Chancellor, B.A., M.S. ...................................................... Tonawanda MERRYL H. TISCH, Vice Chancellor, B.A., M.A. Ed.D. ........................................ New York SAUL B. COHEN, B.A., M.A., Ph.D. ................................................................... New Rochelle JAMES C. DAWSON, A.A., B.A., M.S., Ph.D. ....................................................... Peru ANTHONY S. BOTTAR, B.A., J.D. ......................................................................... Syracuse GERALDINE D. CHAPEY, B.A., M.A., Ed.D. ......................................................... Belle Harbor ARNOLD B. GARDNER, B.A., LL.B. ...................................................................... Buffalo HARRY PHILLIPS, 3rd, B.A., M.S.F.S. ................................................................... Hartsdale JOSEPH E. BOWMAN,JR., B.A., M.L.S., M.A., M.Ed., Ed.D. ................................ Albany JAMES R. TALLON,JR., B.A., M.A. ...................................................................... Binghamton MILTON L. COFIELD, B.S., M.B.A., Ph.D. ........................................................... Rochester ROGER B. TILLES, B.A., J.D. ............................................................................... Great Neck KAREN BROOKS HOPKINS, B.A., M.F.A. ............................................................... Brooklyn NATALIE M. GOMEZ-VELEZ, B.A., J.D. ...............................................................
    [Show full text]