DOCSLIB.ORG

Small-Scale Temporal and Spatial Variability in Foraging Behaviour of the Mid-Shore Gastropod Nerita Yoldii on Seasonal, Tropical, Rocky Shores

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Small-Scale Temporal and Spatial Variability in Foraging Behaviour of the Mid-Shore Gastropod Nerita Yoldii on Seasonal, Tropical, Rocky Shores Vol. 16: 177–188, 2012 AQUATIC BIOLOGY Published online August 16 doi: 10.3354/ab00441 Aquat Biol Small-scale temporal and spatial variability in foraging behaviour of the mid-shore gastropod Nerita yoldii on seasonal, tropical, rocky shores Ariel Chung Yan Yeung, Gray A. Williams* The Swire Institute of Marine Science and Division of Ecology & Biodiversity, School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong SAR ABSTRACT: Describing temporal variation in the foraging behaviour of intertidal gastropods is important to gain an understanding of the environmental conditions that constrain their activity patterns. Foraging behaviour in the tropical gastropod Nerita yoldi was mainly deter- mined by the tidal cycle: individuals foraged when they were awash, or emersed when the rock was wet, migrating downshore to forage and upshore when they returned to refuges. Apart from tidal influences, foraging in N. yoldii also varied with season and tidal state. Indi- viduals were generally more active in summer than in winter and on neap than spring tides; although small-scale daily variation existed. Such temporal variation may be caused by several interacting environmental variables, especially air temperature, pressure and irradi- ance, which influence physical conditions as well as individuals’ metabolism. Individual for- aging patterns were also highly labile between seasons: most individuals would stop and remain stationary on the open rock surface in winter, but returned to refuges after foraging in summer, a pattern probably driven by physical stress. The foraging behaviour of N. yoldii, therefore, is predictable on a coarse scale, in terms of when they are active, but highly labile in duration and foraging range, which indicates the importance of local, daily variation in environmental factors controlling foraging on shores that have strong temporal changes in abiotic conditions. KEY WORDS: Nerita · Foraging behaviour · Tropical shore Resale or republication not permitted without written consent of the publisher INTRODUCTION haviour can, however, be labile within the same spe- cies, varying temporally, for example, with different Variation in the temporal and spatial distribution of seasons (Ng & Williams 2006) and diurnal and tidal foraging behaviour in intertidal organisms is impor- cycles (Chelazzi 1982, Santini et al. 2004, 2011). Such tant in mediating the interactions between different behaviour can also vary spatially with different site species, which in turn can influence community locations (Hartnoll & Wright 1977), habitats (Hawkins structure (Hawkins & Hartnoll 1983, Chapman & & Hartnoll 1982, Williams et al. 1999) and tidal levels Underwood 1992a, Williams et al. 1999, Williams & (Williams & Morritt 1991). These differences are Little 2007). The timing of foraging of nearly all inter- prob ably due to local variation in environmental fac- tidal grazers shows some tidal correlation, presum- tors, which can be causal in driving foraging behav- ably driven by physical stress or predation risk (Little iour or inhibiting activity when conditions are un- 1989, Chapman & Underwood 1992a). Foraging be - favourable (Little et al. 1988, Williams & Little 2007). *Corresponding author. Email: [email protected] © Inter-Research 2012 · www.int-res.com 178 Aquat Biol 16: 177–188, 2012 Such lability in foraging behaviour represents impor- MATERIALS AND METHODS tant adaptive traits in organisms (Mery & Burns 2010). Climatic seasonality, for example, is a large Study sites time-scale temporal pattern that affects foraging behaviour owing to changes in physical stress, Two gently sloping sites (Site 1, ~9 and Site 2,~5 m predation pressure and food availability as well as wide, ~17° slope), ~20 m apart, were selected at Lung associated changes in tidal and diurnal conditions. Kwu Tan, Hong Kong (22° 15’ N, 114° 10’ E) between As a result, such variation in foraging behaviour can 1.25 and 1.75 m above chart datum (CD; i.e. the make it difficult to define precise behavioural pat- height of the lowest astronomical tide), which is the terns of a species (Chapman & Underwood 1992a, most abundant zone of Nerita yoldii (Yeung 2006). Ng & Williams 2006, Santini et al. 2011). The high shore (>1.75 m above CD) at both sites The gastropod genus Nerita Linnaeus 1758 (Neri- appeared barren, whilst the mid and low shores were tacea) has a high abundance and diversity in tropical covered by a layer of biofilm from June to December regions (Vermeij 1973). Most species, such as N. tex- and a low turf of macroalgae (Ulva spp., Enteromor- tilis (Chelazzi et al. 1983) and N. polita (Chelazzi pha spp.) from January to May (Yeung 2006). At both 1982) are zonal shuttlers (Chelazzi et al. 1988), which study sites, a 50 × 50 cm grid of small holes was forage from a refuge either up- or downshore during drilled in the rock, into which a 50 × 50 cm aluminum each tidal cycle before returning to their resting level quadrat (evenly divided using nylon lines to form 100 (Chelazzi et al. 1988). Previous observations on the 5 × 5 cm squares) could be fitted via adjustable, behaviour of Nerita have not, however, investigated 15 cm long, screw legs at each corner of the quadrat, longer-term variations in foraging patterns, such as which held the quadrat over the rock surface. monthly or seasonal variation, al though a longer- term study of N. plicata, N. textilis and N. undata in Kenya showed these species to be more active on Observations of foraging behaviour spring than neap tides (Ruwa & Jaccarini 1988). Nerita are important herbivores in the Hong Kong To investigate temporal variation in the foraging rocky intertidal zone (Hill 1980). In contrast to other behaviour of Nerita yoldii, observations were con- tropical localities where the foraging behaviour of ducted for 24.5 h on 6 occasions in summer 2003 and Nerita has been studied (e.g. Panama, Levings & winter 2003/2004: 3 times during spring tides (daily Garrity 1983), Hong Kong has a strongly seasonal cli- tidal range, >2 m) and 3 times during neap tides mate, with hot, wet summers and cool, dry winters (daily tidal range, <1.25 m). On each randomly (Kaehler & Williams 1996). In addition, Hong Kong’s chosen sampling date, 18 different individuals (size, tidal cycle also shows temporal variation, from semi- 14.4 ± 2.1 mm [mean ± SD]) were tagged 24 h before diurnal (two unequal tides a day during spring tides, observation (Σn = 2 sites × 2 seasons × 2 tidal condi- with ~2.5 m tidal range) to almost diurnal tides (one tions × 3 d × 18 individuals per observation = 432). tide a day, with ~1.0 m tidal range, during neap tides, At 30 min intervals, the location of tagged indi - Morton et al. 1996). As a result, rocky shores ex - viduals was determined to the nearest 2.5 × 2.5 cm perience great temporal variation in environmental square, by recording the corner of the respective 5 × factors, which are likely to influence foraging behav- 5 cm square of the quadrat that the individual was iour patterns of intertidal gastropods (Santini et al. closest to (e.g. upper left) when viewed in the per- 2011). pendicular plane. To do this at night, a red filtered The present study investigated large and small light was used, which did not appear to disturb the scale patterns of temporal variation (with season and nerites (see Little et al. 1988). Preliminary observa- monthly cycles) in the foraging behaviour of an tions showed that Nerita yoldii are inactive and do abundant nerite, Nerita yoldii. The aim of this study not move when they are submerged during high tide. was to identify the general patterns of foraging of N. Observations were, therefore, not made when tagged yoldii to determine the overall rhythms that constrain individuals were immersed by the tide, as they were the behavioural repertoire of this species. Observa- assumed to be inactive. tions of smaller-scale (e.g. daily) variation in foraging The environmental conditions experienced by indi- behaviour, and associated causal factors, were under - viduals were defined as: taken to examine how labile the behaviour of this (1) immersed by the tide (an individual that was com- species can be, and to describe how N. yoldii may re - pletely submerged by the tide); (2) immersed in a spond to local, environmental changes. pool (an individual that was completely submerged Yeung & Williams: Foraging behaviour of Nerita yoldii 179 in a pool); (3) awash (an individual that was washed mine if the direction of the resultant vector differed by waves on the ebbing or rising tide); (4) wet, significantly from random during different seasons emersed (an individual located in any wet microhab- and tidal conditions. itat, but not washed by waves or submerged by the Percentage activity (%) was calculated as the tide or in a pool; an individual partially submerged percentage of individuals exhibiting movement at in a pool was also considered as wet, emersed); and a particular time. Other parameters used to inves- (5) dry, emersed (an individual located in any dry tigate the foraging behaviour of the traced indi - habitat). viduals were: (1) total distance traveled (cm, the To investigate the influence of temperature vari- sum of the distance traveled by an individual dur- ables on individuals’ foraging behaviour, air (~5 cm ing a foraging excursion); (2) foraging range (cm, above the rock surface), seawater, dry and wet rock the maximum displacement of an individual from surfaces and crevice temperatures were measured its initial refuge during a foraging excursion); (3) hourly during each observation period (±0.1°C, n = 5) maximum speed (cm min−1, the maximum speed at both study sites with an Omega K-type (Teflon achieved by an individual during a foraging excur- insulated) thermocouple (dia meter, 0.25 mm) con- sion) and (4) activity duration (h, the total duration nected to a portable thermo meter (Omega).
Load more

Recommended publications
  • Ministério Da Educação Universidade Federal Rural Da Amazônia
    MINISTÉRIO DA EDUCAÇÃO UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA TAIANA AMANDA FONSECA DOS PASSOS Biologia reprodutiva de Nacella concinna (Strebel, 1908) (Gastropoda: Nacellidae) do sublitoral da Ilha do Rei George, Península Antártica BELÉM 2018 TAIANA AMANDA FONSECA DOS PASSOS Biologia reprodutiva de Nacella concinna (Strebel, 1908) (Gastropoda: Nacellidae) do sublitoral da Ilha do Rei George, Península Antártica Trabalho de Conclusão de Curso (TCC) apresentado ao curso de Graduação em Engenharia de Pesca da Universidade Federal Rural da Amazônia (UFRA) como requisito necessário para obtenção do grau de Bacharel em Engenharia de Pesca. Área de concentração: Ecologia Aquática. Orientador: Prof. Dr. rer. nat. Marko Herrmann. Coorientadora: Dra. Maria Carla de Aranzamendi. BELÉM 2018 TAIANA AMANDA FONSECA DOS PASSOS Biologia reprodutiva de Nacella concinna (Strebel, 1908) (Gastropoda: Nacellidae) do sublitoral da Ilha do Rei George, Península Antártica Trabalho de Conclusão de Curso apresentado à Universidade Federal Rural da Amazônia, como parte das exigências do Curso de Graduação em Engenharia de Pesca, para a obtenção do título de bacharel. Área de concentração: Ecologia Aquática. ______________________________________ Data da aprovação Banca examinadora __________________________________________ Presidente da banca Prof. Dr. Breno Gustavo Bezerra Costa Universidade Federal Rural da Amazônia - UFRA __________________________________________ Membro 1 Prof. Dr. Lauro Satoru Itó Universidade Federal Rural da Amazônia - UFRA __________________________________________ Membro 2 Profa. Msc. Rosália Furtado Cutrim Souza Universidade Federal Rural da Amazônia - UFRA Aos meus sobrinhos, Tháina, Kauã e Laura. “Cabe a nós criarmos crianças que não tenham preconceitos, crianças capazes de ser solidárias e capazes de sentir compaixão! Cabe a nós sermos exemplos”. AGRADECIMENTOS Certamente algumas páginas não irão descrever os meus sinceros agradecimentos a todos aqueles que cooperaram de alguma forma, para que eu pudesse realizar este sonho.
    [Show full text]
  • ECOLOGICAL ENERGETICS of TROPICAL LIMPET Cellana Testudinaria (Linnaeus, 1758) LIVING on the ROCKY SHORE of OHOIWAIT, SOUTHEAST MOLUCCAS, INDONESIA
    Journal of Coastal Deveolpment ISSN : 1410-5217 Volume 11, Number 2, February 2008 : 89-96 ECOLOGICAL ENERGETICS OF TROPICAL LIMPET Cellana testudinaria (Linnaeus, 1758) LIVING ON THE ROCKY SHORE OF OHOIWAIT, SOUTHEAST MOLUCCAS, INDONESIA Abraham Seumel Khouw Faculty of Fisheries and Marine Sciences, Pattimura University, Ambon Indonesia Received : November, 2, 2007 ; Accepted :January,4, 2008 ABSTRACT Study on ecological energetics of tropical limpet C. testudinaria has been carried out at approximately one year from October 2001 to September 2002. Population energy budgets estimated on the assumption of steady state conditions for C. testudinaria (Linnaeus, 1758) on the rocky shore of Ohoiwait, are presented. Large difference in population structure, and hence energetics, occurred at different localities along the rocky shore. Relatively high proportions (98 %) of the assimilated energy was lost via metabolism. Assimilation efficiency is 39 %, net growth efficiency is 1.8 %, and ecological efficiency 0.3 %. Production (P), energy flow (A) and total energy consumption (C) were expressed as functions of animal size, in order to facilitate gross estimations of the energy component for which data on size frequency and density are available. Key words: ecological energetics, cellana testudinaria, energy components Correspondence: Phone : +6281343044295, e-mail: [email protected] INTRODUCTION Cellana testudinaria is intertidal, grazing Little has been published on the gastropod abundant on medium to very ecology of C. testudinaria. Khouw (2002) exposed rocky shores of Ohoiwait. The discussed their growth pattern and shell species shows marked zonation, with only a shape variation in relation to zonal little overlap between zones. C. testudinaria distribution. Distribution, abundance, and occurs at several spatial and temporal scales biomass were investigated by Khouw from the extreme low water spring tide (2006a) and presented evidence for the (ELWST) to the extreme high water spring effects of drying.
    [Show full text]
  • Title Biogeography in Cellana (Patellogastropoda, Nacellidae) with Special Emphasis on the Relationships of Southern Hemisphere
    Biogeography in Cellana (Patellogastropoda, Nacellidae) with Title Special Emphasis on the Relationships of Southern Hemisphere Oceanic Island Species González-Wevar, Claudio A.; Nakano, Tomoyuki; Palma, Author(s) Alvaro; Poulin, Elie Citation PLOS ONE (2017), 12(1) Issue Date 2017-01-18 URL http://hdl.handle.net/2433/218484 © 2017 González-Wevar et al. This is an open access article distributed under the terms of the Creative Commons Right Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Type Journal Article Textversion publisher Kyoto University RESEARCH ARTICLE Biogeography in Cellana (Patellogastropoda, Nacellidae) with Special Emphasis on the Relationships of Southern Hemisphere Oceanic Island Species Claudio A. GonzaÂlez-Wevar1,2*, Tomoyuki Nakano3, Alvaro Palma4, Elie Poulin1 1 GAIA-AntaÂrtica, Universidad de Magallanes, Punta Arenas, Chile, 2 Instituto de EcologõÂa y Biodiversidad Ä a1111111111 (IEB), Departamento de Ciencias EcoloÂgicas, Facultad de Ciencias, Universidad de Chile, Nuñoa, Santiago, Chile, 3 Seto Marine Biological Laboratory, Field Science Education and Research Centre, Kyoto University, a1111111111 Nishimuro, Wakayama, Japan, 4 Universidad Gabriela Mistral, Facultad de IngenierõÂa y Negocios, a1111111111 Providencia, Santiago, Chile a1111111111 a1111111111 * [email protected] Abstract OPEN ACCESS Oceanic islands lacking connections to other land are extremely isolated from sources of Citation: GonzaÂlez-Wevar CA, Nakano T, Palma A, potential colonists and have acquired their biota mainly through dispersal from geographi- Poulin E (2017) Biogeography in Cellana cally distant areas. Hence, isolated island biota constitutes interesting models to infer bio- (Patellogastropoda, Nacellidae) with Special geographical mechanisms of dispersal, colonization, differentiation, and speciation. Limpets Emphasis on the Relationships of Southern Hemisphere Oceanic Island Species.
    [Show full text]
  • E Urban Sanctuary Algae and Marine Invertebrates of Ricketts Point Marine Sanctuary
    !e Urban Sanctuary Algae and Marine Invertebrates of Ricketts Point Marine Sanctuary Jessica Reeves & John Buckeridge Published by: Greypath Productions Marine Care Ricketts Point PO Box 7356, Beaumaris 3193 Copyright © 2012 Marine Care Ricketts Point !is work is copyright. Apart from any use permitted under the Copyright Act 1968, no part may be reproduced by any process without prior written permission of the publisher. Photographs remain copyright of the individual photographers listed. ISBN 978-0-9804483-5-1 Designed and typeset by Anthony Bright Edited by Alison Vaughan Printed by Hawker Brownlow Education Cheltenham, Victoria Cover photo: Rocky reef habitat at Ricketts Point Marine Sanctuary, David Reinhard Contents Introduction v Visiting the Sanctuary vii How to use this book viii Warning viii Habitat ix Depth x Distribution x Abundance xi Reference xi A note on nomenclature xii Acknowledgements xii Species descriptions 1 Algal key 116 Marine invertebrate key 116 Glossary 118 Further reading 120 Index 122 iii Figure 1: Ricketts Point Marine Sanctuary. !e intertidal zone rocky shore platform dominated by the brown alga Hormosira banksii. Photograph: John Buckeridge. iv Introduction Most Australians live near the sea – it is part of our national psyche. We exercise in it, explore it, relax by it, "sh in it – some even paint it – but most of us simply enjoy its changing modes and its fascinating beauty. Ricketts Point Marine Sanctuary comprises 115 hectares of protected marine environment, located o# Beaumaris in Melbourne’s southeast ("gs 1–2). !e sanctuary includes the coastal waters from Table Rock Point to Quiet Corner, from the high tide mark to approximately 400 metres o#shore.
    [Show full text]
  • JMS 70 1 031-041 Eyh003 FINAL
    PHYLOGENY AND HISTORICAL BIOGEOGRAPHY OF LIMPETS OF THE ORDER PATELLOGASTROPODA BASED ON MITOCHONDRIAL DNA SEQUENCES TOMOYUKI NAKANO AND TOMOWO OZAWA Department of Earth and Planetary Sciences, Nagoya University, Nagoya 464-8602,Japan (Received 29 March 2003; accepted 6June 2003) ABSTRACT Using new and previously published sequences of two mitochondrial genes (fragments of 12S and 16S ribosomal RNA; total 700 sites), we constructed a molecular phylogeny for 86 extant species, covering a major part of the order Patellogastropoda. There were 35 lottiid, one acmaeid, five nacellid and two patellid species from the western and northern Pacific; and 34 patellid, six nacellid and three lottiid species from the Atlantic, southern Africa, Antarctica and Australia. Emarginula foveolata fujitai (Fissurellidae) was used as the outgroup. In the resulting phylogenetic trees, the species fall into two major clades with high bootstrap support, designated here as (A) a clade of southern Tethyan origin consisting of superfamily Patelloidea and (B) a clade of tropical Tethyan origin consisting of the Acmaeoidea. Clades A and B were further divided into three and six subclades, respectively, which correspond with geographical distributions of species in the following genus or genera: (AÍ) north­ eastern Atlantic (Patella ); (A2) southern Africa and Australasia ( Scutellastra , Cymbula-and Helcion)', (A3) Antarctic, western Pacific, Australasia ( Nacella and Cellana); (BÍ) western to northwestern Pacific (.Patelloida); (B2) northern Pacific and northeastern Atlantic ( Lottia); (B3) northern Pacific (Lottia and Yayoiacmea); (B4) northwestern Pacific ( Nipponacmea); (B5) northern Pacific (Acmaea-’ânà Niveotectura) and (B6) northeastern Atlantic ( Tectura). Approximate divergence times were estimated using geo­ logical events and the fossil record to determine a reference date.
    [Show full text]
  • Do Singapore's Seawalls Host Non-Native Marine Molluscs?
    Aquatic Invasions (2018) Volume 13, Issue 3: 365–378 DOI: https://doi.org/10.3391/ai.2018.13.3.05 Open Access © 2018 The Author(s). Journal compilation © 2018 REABIC Research Article Do Singapore’s seawalls host non-native marine molluscs? Wen Ting Tan1, Lynette H.L. Loke1, Darren C.J. Yeo2, Siong Kiat Tan3 and Peter A. Todd1,* 1Experimental Marine Ecology Laboratory, Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, #02-05, Singapore 117543 2Freshwater & Invasion Biology Laboratory, Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, #02-05, Singapore 117543 3Lee Kong Chian Natural History Museum, Faculty of Science, National University of Singapore, 2 Conservatory Drive, Singapore 117377 *Corresponding author E-mail: [email protected] Received: 9 March 2018 / Accepted: 8 August 2018 / Published online: 17 September 2018 Handling editor: Cynthia McKenzie Abstract Marine urbanization and the construction of artificial coastal structures such as seawalls have been implicated in the spread of non-native marine species for a variety of reasons, the most common being that seawalls provide unoccupied niches for alien colonisation. If urbanisation is accompanied by a concomitant increase in shipping then this may also be a factor, i.e. increased propagule pressure of non-native species due to translocation beyond their native range via the hulls of ships and/or in ballast water. Singapore is potentially highly vulnerable to invasion by non-native marine species as its coastline comprises over 60% seawall and it is one of the world’s busiest ports. The aim of this study is to investigate the native, non-native, and cryptogenic molluscs found on Singapore’s seawalls.
    [Show full text]
  • Intertidal Zonation of Two Gastropods, Nerita Plicata and Morula Granulata, in Moorea, French Polynesia
    INTERTIDAL ZONATION OF TWO GASTROPODS, NERITA PLICATA AND MORULA GRANULATA, IN MOOREA, FRENCH POLYNESIA VANESSA R. WORMSER Integrative Biology, University of California, Berkeley, California 94720 USA Abstract. Intertidal zonation of organisms is a key factor in ecological community structure and the existence of fundamental and realized niches. The zonation of two species of gastropods, Nerita plicata and Morula granulata were investigated using field observations and lab experimentation. The Nerita plicata were found on the upper limits of the intertidal zone while the Morula granulata were found on the lower limits. The distribution of each species was observed and the possible causes of this zonation were examined. Three main factors, desiccation, flow resistance and shell size were tested for their zonation. In the field, shell measurements of each species were made to see if a vertical shell size gradient existed; the results showed an upshore shell size gradient for each species. In the lab, experiments were run to see if the zonation preference found in the field existed in the lab as well. This experiment confirmed that a zonation between these species does in fact exist. Additional experiments were run to test desiccation and flow resistance between each species. A difference in desiccation rates and flow resistance were found with the Nerita plicata being more resistant to both flow and desiccation. The findings of this study provide an understanding on why zonation between these two species could exist as well as why zonation is important within an intertidal community and ecosystems as a whole. Key words: community structure; gastropod; zonation; intertidal; morphometrics; Morula granulata; Nerita plicata; Mo’orea, French Polynesia; INTRODUCTION The main goal of an ecological survey is to because of the high species diversity, the explore and understand the key dynamic convenience of the habitat as well as the easy relationships among organisms living in a collection of the sessile organisms that inhabit community (Elton 1966).
    [Show full text]
  • MOLECULAR PHYLOGENY of the NERITIDAE (GASTROPODA: NERITIMORPHA) BASED on the MITOCHONDRIAL GENES CYTOCHROME OXIDASE I (COI) and 16S Rrna
    ACTA BIOLÓGICA COLOMBIANA Artículo de investigación MOLECULAR PHYLOGENY OF THE NERITIDAE (GASTROPODA: NERITIMORPHA) BASED ON THE MITOCHONDRIAL GENES CYTOCHROME OXIDASE I (COI) AND 16S rRNA Filogenia molecular de la familia Neritidae (Gastropoda: Neritimorpha) con base en los genes mitocondriales citocromo oxidasa I (COI) y 16S rRNA JULIAN QUINTERO-GALVIS 1, Biólogo; LYDA RAQUEL CASTRO 1,2 , Ph. D. 1 Grupo de Investigación en Evolución, Sistemática y Ecología Molecular. INTROPIC. Universidad del Magdalena. Carrera 32# 22 - 08. Santa Marta, Colombia. [email protected]. 2 Programa Biología. Universidad del Magdalena. Laboratorio 2. Carrera 32 # 22 - 08. Sector San Pedro Alejandrino. Santa Marta, Colombia. Tel.: (57 5) 430 12 92, ext. 273. [email protected]. Corresponding author: [email protected]. Presentado el 15 de abril de 2013, aceptado el 18 de junio de 2013, correcciones el 26 de junio de 2013. ABSTRACT The family Neritidae has representatives in tropical and subtropical regions that occur in a variety of environments, and its known fossil record dates back to the late Cretaceous. However there have been few studies of molecular phylogeny in this family. We performed a phylogenetic reconstruction of the family Neritidae using the COI (722 bp) and the 16S rRNA (559 bp) regions of the mitochondrial genome. Neighbor-joining, maximum parsimony and Bayesian inference were performed. The best phylogenetic reconstruction was obtained using the COI region, and we consider it an appropriate marker for phylogenetic studies within the group. Consensus analysis (COI +16S rRNA) generally obtained the same tree topologies and confirmed that the genus Nerita is monophyletic. The consensus analysis using parsimony recovered a monophyletic group consisting of the genera Neritina , Septaria , Theodoxus , Puperita , and Clithon , while in the Bayesian analyses Theodoxus is separated from the other genera.
    [Show full text]
  • The Response of a Protandrous Species to Exploitation, and the Implications for Management: a Case Study with Patellid Limpets
    University of Southampton Research Repository ePrints Soton Copyright © and Moral Rights for this thesis are retained by the author and/or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This thesis cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder/s. The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders. When referring to this work, full bibliographic details including the author, title, awarding institution and date of the thesis must be given e.g. AUTHOR (year of submission) "Full thesis title", University of Southampton, name of the University School or Department, PhD Thesis, pagination http://eprints.soton.ac.uk University of Southampton Faculty of Engineering, Science and Mathematics National Oceanography Centre, Southampton School of Ocean and Earth Sciences The Response of a Protandrous Species to Exploitation, and the Implications for Management: a Case Study with Patellid Limpets. William J F Le Quesne Thesis for the degree of Doctor of Philosophy July 2005 Graduate School of the National Oceanography Centre, Southampton This PhD dissertation by William J F Le Quesne has been produced under the supervision of the following persons: Supervisors: Prof. John G. Shepherd Prof Stephen Hawkins Chair of Advisory Panel: Dr Lawrence E. Hawkins Member of Advisory Panel: Dr John A. Williams University
    [Show full text]
  • Scientific Tools for Coastal Biodiversity Assessments REPORT
    Advanced course on Scientific Tools for Coastal Biodiversity Assessments a practical field-based approach for studying change in biological populations and communities using tropical intertidal habitats Course held at Inhaca Island Marine Biology Station (UEM) 2-14 December 2014 REPORT 2014 MASMA Course – Scientific Tools for Coastal Biodiversity Assessment CONTENTS 1. Institutions and Trainers ....................................................................................................... 3 2. Scope ..................................................................................................................................... 4 3. Objectives .............................................................................................................................. 5 4. Preparation and preliminary activities .................................................................................... 6 5. Travelling organisation .......................................................................................................... 6 6. Accommodation and training facilities ................................................................................... 7 6.1. Choice of Inhaca Island Marine Biology Station (EBMI) ............................................... 7 6.2. Accommodation and subsistence .................................................................................... 7 6.3. Training facilities ........................................................................................................... 8 7. Course
    [Show full text]
  • The Limpets of Hong Kong with Descriptions of Seven New
    60 DAVID DUDGEON Proceedings, First International Workshop Thompson, C.M. and Sparks, R.E. 1977b. Improbability of dispersal of adult Asiatic on the Malacofauna of clams, Corbicula manilensis via the intestinal tract of migratory waterfowl.American Hong Kong and Southern China, Midland Naturalist 98: 219-213. 23 March — 8 April 1977, Hong Kong Walford, P.R. 1946. A new graphic method of describing growth of animals.Biological Bulletin o f the Marine Biological Laboratory, Woods Hole 90: 141-147. Walne, P.R. 1972. The influence of current speed, body size and water temperature on the’ filtration rate o f five species o f bivalves.Journal o f the Marine Biological Asso­ THE LIMPETS OF HONG KONG WITH DESCRIPTIONS OF ciation of the United Kingdom 52: 345-374. SEVEN NEW SPECIES AND SUBSPECIES J. Christiaens 2 4 2 7 Justus Lipsiuslaan 26 B3 500, Hasselt, Belgium During the course of the malacological workshop the following stations were vistited: Wu Kwai Sha: a pebble beach, a rocky shore and a mangrove. Tolo Channel: Bluff Head (on the northern shore), Gruff Head (on the exposed southern shore) and Channel Rock, surrounded by coral, in the middle of the channel and reached by diving to a depth o f 10 m. Hong Kong Island: the exposed rocky shore at Wah Fu and the beach and bay at Stanley, the islands of Kat 0 Chau and Ping Chau, the last with a south-western shore exposed to heavy surf and sheltered to the north east. Subsequently two supplementary lots of limpets were received from Dr.
    [Show full text]
  • Patterns and Processes in the Biogeography of the Limpet Nacella (Mollusca: Patellogastropoda) Across the Southern Ocean Claudio A
    Journal of Biogeography (J. Biogeogr.) (2017) 44, 861–874 ORIGINAL Following the Antarctic Circumpolar ARTICLE Current: patterns and processes in the biogeography of the limpet Nacella (Mollusca: Patellogastropoda) across the Southern Ocean Claudio A. Gonzalez-Wevar1,2*, Mathias Hune€ 2, Nicolas I. Segovia2, Tomoyuki Nakano3, Hamish G. Spencer4, Steven L. Chown5, Thomas Saucede6, Glenn Johnstone7,Andres Mansilla1 and Elie Poulin2 1Universidad de Magallanes, Bulnes 01890, ABSTRACT Punta Arenas, Chile, 2Instituto de Ecologıa y Aim We use an integrative biogeographical approach to further understand the Biodiversidad (IEB), Departamento de evolution of an important Southern Ocean marine benthic element, the limpet Ciencias Ecologicas, Universidad de Chile, Las Palmeras 3425, Nu~ noa,~ Santiago, Chile, 3Seto genus Nacella (Mollusca: Patellogastropoda). Marine Biological Laboratory, Field Science Location Southern Ocean. Education and Research Centre, Kyoto University, Wakayama 649-2211, Japan, Methods We used multi-locus time-calibrated phylogeny of Nacella at the 4Allan Wilson Centre, Department of Zoology, scale of the whole Southern Ocean to elucidate the underlying processes University of Otago, Dunedin 9054, New involved in the origin and diversification of the genus. Zealand, 5School of Biological Sciences, Results Divergence-time estimates suggest that soon after its origin during the Monash University, Melbourne, VIC 3800, mid-Miocene (c. 12.5 Ma), Nacella separated into two main lineages currently Australia, 6Biogeosciences, UMR CNRS 6282, distributed in (1) South America and (2) Antarctica and the sub-Antarctic Universite de Bourgogne, Dijon 21000, islands. We identified two pulses of diversification, during the late Miocene (8 France, 7Australian Antarctic Division, < Kingston TAS 7050, Australia to 5.5 Ma) and the Pleistocene ( 1 Ma).
    [Show full text]