DOCSLIB.ORG

Introduced Marine Biota in Western Australian Waters

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Introduced Marine Biota in Western Australian Waters DOI: 10.18195/issn.0312-3162.25(1).2008.001-044 Records of the Western Australian ;\Iuseum 25: 1 44 (2008), Introduced marine biota in Western Australian waters 2 2 John M. Huisman', Diana S. Jones , Fred E. Wells" and Timothy Burton I Western Australian Ilcrbarium, l)epartnwnt of Fnvironnwnt and Conservation, Locked Bag 11).1, Bentley Delivery Centre, Western Australia 6983, Australia, and School of Biological Sciences and Biotl'chnology, Murdoch University, Murdoch, Western Australia 6150, Australia, Department of Aquatic Zoology, vVestern Australian Museum, Locked Bag 49, Welshpool DC, Western Australia 69R6, Australia, ' Western Australian Department of Fisheries, Level 3,I6R St Georges Terrace, Perth, Western Australia 6000, Australia, Abstract - An annotated compendium is presented of 102 species of marine algae and animals that have been reported as introduced into Western Australian marine and estuarine waters, four of which arc on the Australian national list of targeted marine pest species, For each species the authority, distribution (both in Western Australia and elsewhere), voucher specimen(s) and remarks are given, Sixty species are considered to have been introduced through human activity, including three on the list of Australian declared marine pests, The most invasive groups are: bryozoans (15 species), crustaceans (13 species) and molluscs (9 species), Seven of these introduced species, including four natural introductions, have not been found recently and are not presently considered to be living in Western Australia, Twenty- six species are regarded as cryptogenic or native, The records of nine species, including two declared marine pests, are questionable or rejected, The distribution of the 60 introduced species shows that most (37) arc temperate species that occur from Geraldton south; only 6 arc tropical species that occur from Shark Bay north; 17 introduced species occur in both the southern and northern halves of Western Australia, Because most of the introduced species are temperate species, southern marine areas have more introduced marine species than northern areas, The greatest concentration is in the southwest corner: 46 in Fremantle, Cockburn Sound and the lower Swan River; 25 in Albany and 24 in Bunbury, We conclude with a' strong recommel~dation that continuing baseline taxonomic research and survevs of the vVestern Australian marine waters be regarded as an essential comt;onent of protecting and managing the State's valuable marine environment. INTRODUCTION result of these pest intrusions (Paesanti et al. 1991; The introduction of exotic species into the Blanchard 1995; Blanchard 1997; Wyatt et al. 2005), marine environment is a major threat to native Some introduced species can directly impact biodiversity and ecosystem health (Padilla et al. human health, for example by toxin accumulation 1996; l-lass and Jones 2000), Three primary vectors in shellfish due to toxic dinoflagellates for marine introductions are recognised via (Hallegraeff et ai, 1988), Consumption of ballast water discharge, hull fouling or deliberate contaminated shellfish may result in illness or introductions, such as through aquaculture death (CampbeIl1994; Waiters 1996), (Carlton 1985) (species can also be accidentally Western Australia (WA) has, thus far, remained introduced by being attached to deliberately relativelv free of marine pests, lom's (1992a) introduced organisms such as oysters), While most recorded 25 marine introductions into the State'"s introductions remain relatively passive and waters, over half (15) detected since the 1970s and apparently co-exist with native without most of those introduced shipping, either as detriment, many others have the ability to become fouling organisms or via ballast water. Furlani pests, dominating and excluding local species and (1996) also recorded 25 introduced marine species resulting in major shifts in ecosystem structure in Western Australia. In 1999, this number was (Brenchley and Carlton 1983; Crosholz and Ruiz increased to 30 (Hass and jones 1(99), Those 1995), Local loss of biodiversity is an inevitable introductions that have been reported have 2 J.M. Huisman, D.S. Jones, F.E. Wells, T. Burton generally remained innocuous, or have been largely a major pest in the Mediterranean (Verlaque et £11. restricted to artificial environments such as 2003). The vector by which these introductions harbours. This parallels the situation in other occurred is not known, especially in areas where Australian areas. A search of the National native fauna is not well documented. Introduced Marine Pest Information System website Several factors can hamper marine pest surveys. (NIMPIS 2002) reveals a list of 44 species Obvious impediments include the marine introduced or possibly introduced into WA. environment itself, as most introductions remain Additional information presented here increases the hidden from sight, their presence often only number of known introduced species to 60. As yet revealed by snorkelling or SCUBA diving. Perhaps there are no published data regarding adverse of greater significance, however, is the difficulty in impacts of introduced species in Western Australia accurately identifying introduced species and (Hass and Jones 1999), but several have been shown assessing their impact. For almost all introduced to have significant impacts in other areas, by species it is virtually impossible to ascertain the competition for food and/or space. For example, no 'event' that led to the introduction, and many are threats to Western Australian native species, not observed until they are well established and fisheries or seagrass beds were identified through essentially impossible to eradicate. Accurate the introduction of SabeJJa spaJJanzanii, the identification is essential, primarily to ensure that European fan worm (Clapin and Evans 1995), introduced species are not missed, but equally to although studies in Victoria have suggested that ensure that native species are not inadvertently this species has the potential to compete with native recorded as introductions, as there are many filter feeders and change the structure of the benthic undescribed native species. For example, some food web (WaIters 1996). Adverse impacts may not species generally considered to be cosmopolitan occur until decades after the initial introduction and may be undocumented introductions or, conversely, establishment (Courtney 1990) and it would, non-introduced native species (Chapman and therefore, be extremely short-sighted to assume that Carlton 1991; Poore 1996). Western Australia's relatively unaffected marine The large number of ships, private yachts, and environment is somehow immune to infestation by illegal foreign fishers means that there is a pest species. considerable current potential for additional marine While the impact of introduced species in WA is species to be introduced into WA. The current as yet unknown, the likelihood of a pest outbreak resource boom is concentrated in the Pilbara, but is high, as the State includes many high traffic includes all parts of Western Australia. The planned ports with a variety of habitats, ranging from increase in shipping movements means there will tropical to temperate. Even a cursory review of the be increased threats of species being introduced marine species known to be pests elsewhere will into WA. There have already been several incidents reveal that, for most, suitable conditions for their that give cause for alarm. In October 2002, the cutter growth and possible survival can be found suction dredge Leonardo da Vinci arrived in somewhere in the State (Department of Geraldton almost directly from the Caribbean and Agriculture, Fisheries and Forestry 2006). Thus the had a number of foreign species, including potential risk of a pest incursion is high and on-going pest species, in its sea chests or attached to its hull. vigilance is important if WA is to remain relatively Prompt action was taken by authorities to minimise pest free. It is also pertinent to point out here that the chances of an introduction. A resurvey is the incursion of marine pests is a two-way process. planned to see if any species have been introduced. For example, the Australasian barnacle A second incident occurred in late 2006, when the Austrominius modestus Darwin was introduced dredge Volvox Australia arrived at the port of into Europe from Australia or New Zealand Dampier fouled with the Asian green mussel, Pema following the end of World War II, attached to the viridis. It was denied entry and went to Singapore hulls of returning ships (Bishop, 1947). The species for cleaning in drydock before being allowed to spread, becoming established on the British return to WA. More recently a barge arrived in mainland coast and then extending to Europe Dampier and on inspection was found to have an (Bishop and Crisp 1957; Crisp 1958). Currently the extensively fouled hull. It was immediately ordered species occurs from the Shetland Islands to to go out to the 200 m depth contour and be cleaned Portugal and Maderia (Southward and Crisp 1963; before returning to port; on return to the coast the Hiscock et £11. 1978; O'Riordan and Ramsay 1999; ship was reinspected and allowed to enter Port Wirtz et al. 2006). Similarly the temperate Hedland. Australian gastropod Bedeva paivae (Crosse, 1864) In managing incidents such as these, it is critical has colonised South Africa (Kilburn and Rippey that we understand what species have been 1982) and the south-western
Load more

Recommended publications
  • Risk Analysis: Vessel Biofouling
    Risk Analysis: Vessel Biofouling ISBN 978-0-478-37548-0 (print) ISBN 978-0-478-37549-7 (online) 15 February 2011 Risk Analysis: Vessel Biofouling 15 February 2011 Approved for general release Christine Reed Manager, Risk Analysis Ministry of Agriculture and Forestry Requests for further copies should be directed to: Publication Adviser MAF Information Bureau P O Box 2526 WELLINGTON Telephone: 0800 00 83 33 Facsimile: 04-894 0300 This publication is also available on the MAF website at http://www.biosecurity.govt.nz/regs/imports/ihs/risk © Crown Copyright - Ministry of Agriculture and Forestry i Contributors to this risk analysis 1. Primary author/s Dr Andrew Bell Senior Adviser MAF Biosecurity New Zealand Risk Analysis, Marine Wellington Simon Phillips Adviser MAF Biosecurity New Zealand Risk Analysis, Marine Wellington Dr Eugene Georgiades Senior Adviser MAF Biosecurity New Zealand Risk Analysis, Marine Wellington Dr Daniel Kluza Senior Adviser MAF Biosecurity New Zealand Risk Analysis, Marine Wellington 2. Secondary contributors Dr Christopher Denny Adviser MAF Biosecurity New Zealand Border Standards Wellington 3. External peer review John Lewis Principal Marine Consultant ES Link Services Pty Ltd Melbourne, Victoria, Australia Richard Piola Senior Scientist Cawthron Institute Nelson, New Zealand The draft risk analysis has also been internally reviewed by: Liz Jones (Border Standards); Justin McDonald (Post-Clearance); Melanie Newfield (Risk Analysis); Howard Pharo (Risk Analysis); Sandy Toy (Risk Analysis). The contribution of all the reviewers is gratefully acknowledged. ii Contents Page Executive summary 1 Definitions 7 1. Introduction 8 1.1. Background 8 1.2. Scope 13 1.3. References 14 2. Methodology 19 2.1.
    [Show full text]
  • Settlement Patterns in Ascidians Concerning Have Been
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Digital.CSIC Larval settlement behaviour in six gregarious ascidians in relation to adult 2 distribution 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Marc Rius1,2,*, George M. Branch2, Charles L. Griffiths1,2, Xavier Turon3 18 19 20 1 Centre for Invasion Biology, Zoology Department, University of Cape Town, 21 Rondebosch 7701, South Africa 22 23 2 Marine Biology Research Centre, Zoology Department, University of Cape Town, 24 Rondebosch 7701, South Africa 25 26 3 Center for Advanced Studies of Blanes (CEAB, CSIC), Accés Cala St. Francesc 14, 27 17300 Blanes (Girona), Spain 28 29 30 31 32 33 34 * Corresponding author: Marc Rius 35 Centre for Invasion Biology, Zoology Department, University of Cape Town, 36 Rondebosch 7701, South Africa 37 E-mail: [email protected] 38 Telephone: +27 21 650 4939 39 Fax: +27 21 650 3301 40 41 Running head: Settlement patterns of gregarious ascidians 42 43 44 1 45 ABSTRACT 46 Settlement influences the distribution and abundance of many marine organisms, 47 although the relative roles of abiotic and biotic factors influencing settlement are poorly 48 understood. Species that aggregate often owe this to larval behaviour, and we ask 49 whether this predisposes ascidians to becoming invasive, by increasing their capacity to 50 maintain their populations. We explored the interactive effects of larval phototaxis and 51 geotaxis and conspecific adult extracts on settlement rates of a representative suite of 52 six species of ascidians that form aggregations in the field, including four aliens with 53 global distributions, and how they relate to adult habitat characteristics.
    [Show full text]
  • High Level Environmental Screening Study for Offshore Wind Farm Developments – Marine Habitats and Species Project
    High Level Environmental Screening Study for Offshore Wind Farm Developments – Marine Habitats and Species Project AEA Technology, Environment Contract: W/35/00632/00/00 For: The Department of Trade and Industry New & Renewable Energy Programme Report issued 30 August 2002 (Version with minor corrections 16 September 2002) Keith Hiscock, Harvey Tyler-Walters and Hugh Jones Reference: Hiscock, K., Tyler-Walters, H. & Jones, H. 2002. High Level Environmental Screening Study for Offshore Wind Farm Developments – Marine Habitats and Species Project. Report from the Marine Biological Association to The Department of Trade and Industry New & Renewable Energy Programme. (AEA Technology, Environment Contract: W/35/00632/00/00.) Correspondence: Dr. K. Hiscock, The Laboratory, Citadel Hill, Plymouth, PL1 2PB. [email protected] High level environmental screening study for offshore wind farm developments – marine habitats and species ii High level environmental screening study for offshore wind farm developments – marine habitats and species Title: High Level Environmental Screening Study for Offshore Wind Farm Developments – Marine Habitats and Species Project. Contract Report: W/35/00632/00/00. Client: Department of Trade and Industry (New & Renewable Energy Programme) Contract management: AEA Technology, Environment. Date of contract issue: 22/07/2002 Level of report issue: Final Confidentiality: Distribution at discretion of DTI before Consultation report published then no restriction. Distribution: Two copies and electronic file to DTI (Mr S. Payne, Offshore Renewables Planning). One copy to MBA library. Prepared by: Dr. K. Hiscock, Dr. H. Tyler-Walters & Hugh Jones Authorization: Project Director: Dr. Keith Hiscock Date: Signature: MBA Director: Prof. S. Hawkins Date: Signature: This report can be referred to as follows: Hiscock, K., Tyler-Walters, H.
    [Show full text]
  • Phlebobranchia of CTAW
    PHLEBOBRANCHIA PHLEBOBRANCHIA The suborder Phlebobranchia (order Enterogona) is characterised by having unpaired gonads present only on the same side of the body as the gut. As in Stolidobranchia, the body is not divided into different sections (such as thorax, abdomen and posterior abdomen) as the gut is folded up in the parietal body wall outside the pharynx and the large branchial sac occupies the whole length of the body. Usually the branchial sac (which is flat, without folds) has internal longitudinal vessels (although only vestiges remain in Agneziidae). Epicardial sacs do not persist in adults as they do in Aplousobranchia, although excretory vesicles (nephrocytes) embedded in the body wall over the gut are known to originate from the embryonic epicardium in Ascidiidae and Corellidae. Most phlebobranchs are solitary. However, Plurellidae Kott, 1973 includes both solitary and colonial forms, and Perophoridae Giard, 1872 are all colonial. Replication in Perophoridae is from ectodermal epithelium (rather than endodermal or mesodermal tissue the mesodermal tissue of the vascular stolon (rather than the endodermal tissue as in most as in Aplousobranchia). The process of replication has not been investigated in Plurellidae. Phlebobranch taxa occurring in Australia are documented in Kott (1985). Family level taxa are characterised principally by the size and form of the branchial sac including the number of branchial vessels and form of the stigmata; the form, size and position of the gonads; and the habit (colonial or solitary) of the taxon. Berrill (1950) has discussed problems in assessing the phylogeny of Perophoridae. References Berrill, N.J. (1950). The Tunicata. Ray Soc. Publs 133: 1–354 Giard, A.M.
    [Show full text]
  • Acf Final Cs
    A B C D E F G H I J K L M N O P NORTH MARINE REGION AUSTRALIA’S OCEANS: FROM ASIA TO ANTARCTICA AUSTRALIAN www.acfonline.org.au/oceans 1 1 NORTH-WEST MARINE REGION The 700,000 square kilometres of this region cover the shallow waters of the Gulf of Carpentaria and the oceans treasure map The region’s one million square kilometres contain Arafura and Timor seas. Inshore ocean life is an extensive continental shelf, diverse and influenced by the mixing of freshwater runoff from productive coral reefs and some of the best examples Australia’s oceans are the third largest and most Without our oceans, Australia’s environment, tropical rainfall and wind and storm-driven surges of tropical and arid-zone mangroves in the world. of sea water. Many turtles, dugongs, dolphins and diverse on Earth. Three major oceans, five climate economy, society and culture would be very The breeding and feeding grounds for a number of seabirds travel through the area. threatened migratory species are found here along Christmas zones, varied underwater seascapes and mighty different. They are our lifestyle-support system. But Island currents bring together an amazing wealth of ocean they have suffered from our use and less than five 2 with large turtle and seabird populations. 2 Cocos treasures. This map shows you where to find them. per cent is free of fishing and offshore oil and gas. e Ara in fura C R Keeling r any eg a ons io Islands M n Tor Norfolk res rth Island Australia has the world’s largest area of coral reefs, To protect our ocean treasures Australia needs to: o Strait TIMOR N DARWIN Van Diemen Raine Island the largest single reef−the Great Barrier Reef−and • create a network of marine national parks free of SEA Rise Wessel the largest seagrass meadow in Shark Bay.
    [Show full text]
  • Mapping and Distribution of Sabella Spallanzanii in Port Phillip Bay Final
    Mapping and distribution of Sabellaspallanzanii in Port Phillip Bay Final Report to Fisheries Research and Development Corporation (FRDC Project 94/164) G..D. Parry, M.M. Lockett, D.P. Crookes, N. Coleman and M.A. Sinclair May 1996 Mapping and distribution of Sabellaspallanzanii in Port Phillip Bay Final Report to Fisheries Research and Development Corporation (FRDC Project 94/164) G.D. Parry1, M. Lockett1, D. P. Crookes1, N. Coleman1 and M. Sinclair2 May 1996 1Victorian Fisheries Research Institute Departmentof Conservation and Natural Resources PO Box 114, Queenscliff,Victoria 3225 2Departmentof Ecology and Evolutionary Biology Monash University Clayton Victoria 3068 Contents Page Technical and non-technical summary 2 Introduction 3 Background 3 Need 4 Objectives 4 Methods 5 Results 5 Benefits 5 Intellectual Property 6 Further Development 6 Staff 6 Final cost 7 Distribution 7 Acknow ledgments 8 References 8 Technical and Non-technical Summary • The sabellid polychaete Sabella spallanzanii, a native to the Mediterranean, established in Port Phillip Bay in the late 1980s. Initially it was found only in Corio Bay, but during the past fiveyears it has spread so that it now occurs throughout the western half of Port Phillip Bay. • Densities of Sabella in many parts of the bay remain low but densities are usually higher (up to 13/m2 ) in deeper water and they extend into shallower depths in calmer regions. • Sabella larvae probably require a 'hard' surface (shell fragment, rock, seaweed, mollusc or sea squirt) for initial attachment, but subsequently they may use their own tube as an anchor in soft sediment . • Changes to fish communities following the establishment of Sabella were analysed using multidimensional scaling and BACI (Before, After, Control, Impact) design analyses of variance.
    [Show full text]
  • Special Issue3.7 MB
    Volume Eleven Conservation Science 2016 Western Australia Review and synthesis of knowledge of insular ecology, with emphasis on the islands of Western Australia IAN ABBOTT and ALLAN WILLS i TABLE OF CONTENTS Page ABSTRACT 1 INTRODUCTION 2 METHODS 17 Data sources 17 Personal knowledge 17 Assumptions 17 Nomenclatural conventions 17 PRELIMINARY 18 Concepts and definitions 18 Island nomenclature 18 Scope 20 INSULAR FEATURES AND THE ISLAND SYNDROME 20 Physical description 20 Biological description 23 Reduced species richness 23 Occurrence of endemic species or subspecies 23 Occurrence of unique ecosystems 27 Species characteristic of WA islands 27 Hyperabundance 30 Habitat changes 31 Behavioural changes 32 Morphological changes 33 Changes in niches 35 Genetic changes 35 CONCEPTUAL FRAMEWORK 36 Degree of exposure to wave action and salt spray 36 Normal exposure 36 Extreme exposure and tidal surge 40 Substrate 41 Topographic variation 42 Maximum elevation 43 Climate 44 Number and extent of vegetation and other types of habitat present 45 Degree of isolation from the nearest source area 49 History: Time since separation (or formation) 52 Planar area 54 Presence of breeding seals, seabirds, and turtles 59 Presence of Indigenous people 60 Activities of Europeans 63 Sampling completeness and comparability 81 Ecological interactions 83 Coups de foudres 94 LINKAGES BETWEEN THE 15 FACTORS 94 ii THE TRANSITION FROM MAINLAND TO ISLAND: KNOWNS; KNOWN UNKNOWNS; AND UNKNOWN UNKNOWNS 96 SPECIES TURNOVER 99 Landbird species 100 Seabird species 108 Waterbird
    [Show full text]
  • Biology of the Invasive Ascidian Ascidiella Aspersa in Its Native Habitat: Reproductive Patterns and Parasite Load
    Estuarine, Coastal and Shelf Science 181 (2016) 249e255 Contents lists available at ScienceDirect Estuarine, Coastal and Shelf Science journal homepage: www.elsevier.com/locate/ecss Biology of the invasive ascidian Ascidiella aspersa in its native habitat: Reproductive patterns and parasite load * Sharon A. Lynch , Grainne Darmody, Katie O'Dwyer, Mary Catherine Gallagher, Sinead Nolan, Rob McAllen, Sarah C. Culloty School of Biological, Earth and Environmental Sciences, Aquaculture and Fisheries Development Centre and Environmental Research Institute, University College Cork, The Cooperage, Distillery Fields, North Mall, Cork, Ireland article info abstract Article history: The European sea squirt Ascidiella aspersa is a solitary tunicate native to the northeastern Atlantic, Received 4 February 2016 commonly found in shallow and sheltered marine ecosystems where it is capable of forming large Received in revised form clumps and outcompeting other invertebrate fauna at settlement. To date, there have been relatively few 28 July 2016 studies looking at the reproductive biology and health status of this invasive species. Between 2006 and Accepted 29 August 2016 2010 sampling of a native population took place to investigate gametogenesis and reproductive cycle and Available online 31 August 2016 to determine the impact of settlement depth on reproduction. In addition, parasite diversity and impact was assessed. A staging system to assess reproductive development was determined. The study high- Keywords: Ascidiella aspersa lighted that from year to year the tunicate could change its reproductive strategy from single sex to Gametogenesis hermaphrodite, with spawning possible throughout the year. Depth did not impact on sex determination, Parasites however, gonad maturation and spawning occurred earlier in individuals in deeper waters compared to Invasives shallow depth and it also occurred later in A.
    [Show full text]
  • OREGON ESTUARINE INVERTEBRATES an Illustrated Guide to the Common and Important Invertebrate Animals
    OREGON ESTUARINE INVERTEBRATES An Illustrated Guide to the Common and Important Invertebrate Animals By Paul Rudy, Jr. Lynn Hay Rudy Oregon Institute of Marine Biology University of Oregon Charleston, Oregon 97420 Contract No. 79-111 Project Officer Jay F. Watson U.S. Fish and Wildlife Service 500 N.E. Multnomah Street Portland, Oregon 97232 Performed for National Coastal Ecosystems Team Office of Biological Services Fish and Wildlife Service U.S. Department of Interior Washington, D.C. 20240 Table of Contents Introduction CNIDARIA Hydrozoa Aequorea aequorea ................................................................ 6 Obelia longissima .................................................................. 8 Polyorchis penicillatus 10 Tubularia crocea ................................................................. 12 Anthozoa Anthopleura artemisia ................................. 14 Anthopleura elegantissima .................................................. 16 Haliplanella luciae .................................................................. 18 Nematostella vectensis ......................................................... 20 Metridium senile .................................................................... 22 NEMERTEA Amphiporus imparispinosus ................................................ 24 Carinoma mutabilis ................................................................ 26 Cerebratulus californiensis .................................................. 28 Lineus ruber .........................................................................
    [Show full text]
  • WABN #155 2015 Sep.Pdf
    Western Australian Bird Notes Quarterly Newsletter of the Western Australian Branch of BirdLife Australia No. 155 September 2015 birds are in our nature Hooded Plover, Mylies Beach, west of Hopetoun, Fitzgerald River National Park (see p18). Photo by John Tucker Brown Quail, Bold Park (see p11). Photo by Paul Sellers See Faure Island report, p4. Figure 2 shows a fluctuation over the six surveys in the abundance of significant species in this suite of birds. Compared with 2013, in 2014 there were more Lesser Sand Plovers (682 in 2014, 676 in 2013) and Grey-tailed Tattlers (251, 237) Front cover: South Polar Skua seen off Albany (see report, p11). Photo by Plaxy Barrett Page 2 Western Australian Bird Notes, No. 155 September 2015 Western Australian Branch of EXECUTIVE Committee BirdLife Australia Office: Peregrine House Chair: Mike Bamford 167 Perry Lakes Drive, Floreat WA 6014 Co Vice Chairs: Sue Mather and Nic Dunlop Hours: Monday-Friday 9:30 am to 12.30 pm Telephone: (08) 9383 7749 Secretary: Kathryn Napier E-mail: [email protected] Treasurer: Frank O’Connor BirdLife WA web page: www.birdlife.org.au/wa Chair: Mike Bamford Committee: Mark Henryon, Paul Netscher, Sandra Wallace and Graham Wooller (three vacancies). BirdLife Western Australia is the WA Branch of the national organisation, BirdLife Australia. We are dedicated to creating a brighter future for Australian birds. General meetings: Held at the Bold Park Eco Centre, Perry Lakes Drive, Floreat, commencing 7:30 pm on the 4th Monday of the month (except December) – see ‘Coming events’ for details. Executive meetings: Held at Peregrine House on the 2nd Monday of the month.
    [Show full text]
  • Cnidaria: Hydrozoa) Associated to a Subtropical Sargassum Cymosum (Phaeophyta: Fucales) Bed
    ZOOLOGIA 27 (6): 945–955, December, 2010 doi: 10.1590/S1984-46702010000600016 Seasonal variation of epiphytic hydroids (Cnidaria: Hydrozoa) associated to a subtropical Sargassum cymosum (Phaeophyta: Fucales) bed Amanda Ferreira Cunha1 & Giuliano Buzá Jacobucci2 1 Programa de Pós-Graduação em Zoologia, Instituto de Biociências, Universidade de São Paulo. Rua do Matão, Travessa 14, 101, Cidade Universitária, 05508-900 São Paulo, SP, Brazil. E-mail: [email protected] 2 Instituto de Biologia, Universidade Federal de Uberlândia. Rua Ceará, Campus Umuarama, 38402-400 Uberlândia, MG, Brazil. E-mail: [email protected] ABSTRACT. Hydroids are broadly reported in epiphytic associations from different localities showing marked seasonal cycles. Studies have shown that the factors behind these seasonal differences in hydroid richness and abundance may vary significantly according to the area of study. Seasonal differences in epiphytic hydroid cover and richness were evaluated in a Sargassum cymosum C. Agardh bed from Lázaro beach, at Ubatuba, Brazil. Significant seasonal differences were found in total hydroid cover, but not in species richness. Hydroid cover increased from March (early fall) to February (summer). Most of this pattern was caused by two of the most abundant species: Aglaophenia latecarinata Allman, 1877 and Orthopyxis sargassicola (Nutting, 1915). Hydroid richness seems to be related to S. cymosum size but not directly to its biomass. The seasonal differences in hydroid richness and algal cover are shown to be similar to other works in the study region and in the Mediterranean. Seasonal recruitment of hydroid species larvae may be responsible for their seasonal differences in algal cover, although other factors such as grazing activity of gammarid amphipods on S.
    [Show full text]
  • Title Occurrence of the European Ascidian Ascidiella Scabra (Müller
    Occurrence of the European ascidian Ascidiella scabra (Müller, Title 1776) in the 19 century in Nagasaki, Japan, probably as an ephemeral alien species Author(s) NISHIKAWA, Teruaki; OTANI, Michio Contributions from the Biological Laboratory, Kyoto Citation University (2004), 29(4): 401-408 Issue Date 2004-07-21 URL http://hdl.handle.net/2433/156412 Right Type Departmental Bulletin Paper Textversion publisher Kyoto University Contr. biol. lab. Kyoto Univ., Vol. 29, pp. 401ZK)8. Issued 21 July 2004 Occurrence of the European ascidian Ascidiella scabra (Milller, 1776) in the 19 century in Nagasaki, Japan, probably as an ephemeral alien species Teruaki NISHIKAWA' and Michio OTANI2 Thei Nagoya University Museum, Chikusa-ku, Nagoya, 464-8601 Japan 2Marine Ecological Institute Inc., 3-3-4 Harada Moto-machi, Toyonaka, 561 -0808 Japan ABSTRACT The generic affiliation of the single Japanese record of the ascidian genus Ascidietta, as "A. virginea (MtiIIer)" by Hartmeyer in 1902, was questioned by Nishikawa in 1995 because of the genus's natura1 distribution being confined to Atlantic waters, the somewhat confused history of taxonomy in the genus and allies, and of the insufficient description. Our personal reexamination of the material collected from Nagasaki and deposited in the Museum fUr Naturkunde der Humboldt-Universitat zu Berlin reyeals that it is identical to Ascidietla scabra (Mti11er, 1776), so far recorded exclusively from European boreal to warm-temperate waters. Combining imperfect label information of the material with historical knowledge, the material is supposed to have been collected in February, 1861, by Mr. Otto SchottmUller, a member of the Prussian East Asia Expedition led by Graf zu Eulenburg.
    [Show full text]