DOCSLIB.ORG

Epibiotic Sponges on the Scallops Chlamys Hastata and Chlamys Rubida: Increased Survival in a High- Sediment Environment Duncan O

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Epibiotic Sponges on the Scallops Chlamys Hastata and Chlamys Rubida: Increased Survival in a High- Sediment Environment Duncan O Western Washington University Masthead Logo Western CEDAR Environmental Sciences Faculty and Staff Environmental Sciences Publications 12-2002 Epibiotic Sponges on the Scallops Chlamys Hastata and Chlamys Rubida: Increased Survival in a High- Sediment Environment Duncan O. Burns Western Washington University Brian L. Bingham Western Washington University, [email protected] Follow this and additional works at: https://cedar.wwu.edu/esci_facpubs Part of the Environmental Sciences Commons Recommended Citation Burns, Duncan O. and Bingham, Brian L., "Epibiotic Sponges on the Scallops Chlamys Hastata and Chlamys Rubida: Increased Survival in a High-Sediment Environment" (2002). Environmental Sciences Faculty and Staff Publications. 1. https://cedar.wwu.edu/esci_facpubs/1 This Article is brought to you for free and open access by the Environmental Sciences at Western CEDAR. It has been accepted for inclusion in Environmental Sciences Faculty and Staff ubP lications by an authorized administrator of Western CEDAR. For more information, please contact [email protected]. J. Mar. Biol. Ass. U.K. (2002), 82,961^966 Printed in the United Kingdom Epibiotic sponges on the scallops Chlamys hastata and Chlamys rubida: increased survival in a high-sediment environment P O Duncan O. Burns* and Brian L. Bingham O *Department of Biology,Western Washington University, Bellingham, WA 98225, USA. Department of Environmental Sciences, P Western Washington University, Bellingham, WA 98225, USA. Corresponding author, 1125 13th Street, Bellingham, WA 98229 e-mail: [email protected] The small free-swimming scallops, Chlamys hastata and Chlamys rubida, are frequently encrusted by the sponges Mycale adhaerens and Myxilla incrustans. It is unclear why this association exists. We hypothesized that living on scallop valves increases sponge survival by reducing the e¡ects of sediment accumulation. Scallops were collected to measure correlations between sediment load and encrusting sponge mass. In the laboratory, the survival of sponges on living scallops and empty scallop valves was measured. Time-lapse video was used to quantify spontaneous swimming and clapping of C. hastata. In the ¢eld, both scallop size and sponge mass were signi¢cantly greater in high turbidity sites. In the laboratory, sponges on empty scallop valves experienced near complete mortality after ¢ve weeks. Manually clearing sediments increased survival but did not duplicate the high survival of sponges on living scallops, which regularly swam or clapped their valves. INTRODUCTION not clear that any species of seastar in the Puget Sound eats scallops as a signi¢cant part of its natural diet. Mauzey et al. Epibiotic invertebrates encrust the valves of scallops (1968), in an extensive survey of seastars in the Puget around the world (e.g. Forester, 1979; Cherno¡, 1987; Sound region, found only four of 18 species feeding on Ward & Thorpe, 1991; Berkman, 1994).The selective forces scallops in the ¢eld (scallops were seen in only six of nearly driving these epifaunal associations are either unique to 3000 feeding observations). Two of six predation observa- each association, or common threads have simply not yet tions were the seastar Pteraster tesselatus, which actually been described. feeds preferentially on M. adhaerens and Myxilla encrustans The associations of the sponges Mycale adhaerens (Lambe) from the valves of scallops as well as on the scallops and Myxilla incrustans (Esper) with the scallops Chlamys themselves (Rohenhous & Guberlet, 1946). Clearly, hastata (Sowerby) and Chlamys rubida (Hinds) are a domi- epibiotic sponges could actually be a liability for scallops nant feature of the benthic biota on hard substrates in the encountering this seastar. Puget Sound and San Juan Archipelago,Washington, USA. It is possible that the greater bene¢t from the sponge/ Currently, the most popular theory explaining these strong scallop association accrues not to the scallop but to the associations is that both scallops and sponges are better able sponge. Bloom (1975) observed in the laboratory that to escape predators when they are living symbiotically. dorid nudibranchs were better able to feed on epibiotic In the laboratory, Bloom (1975) found that the pre- sponges when their scallop hosts were prevented from datory seastars Orthasterias koehleri and Evasterias troschelii swimming. He suggested that swimming by the scallops had a harder time gripping, manipulating and capturing provides an escape for the sessile sponge, thus serving as a scallops that were covered by epibiotic sponge. He asserted secondary selective force favouring the association. that sponge-covered scallops could, therefore, more easily While such predator escape may bene¢t the sponge, we escape predation. Stimulated by these ¢ndings, researchers hypothesized that a more likely bene¢t is an escape from have applied the seastar predation model to other sponge/ heavy sediment deposition. Sponges are sensitive to high scallop associations and obtained similar results (Forester, levels of suspended particles; many sponges are excluded 1979; Cherno¡ 1987). Although these data seem to support from areas with heavy sediment loads (Bakus, 1967) since seastar predation and the tube-foot interference mechanism their canals and chambers can be easily clogged by sediment as a reasonable explanation for the association, it is not (Gerrodette & Flechsig, 1979). Cherno¡ (1987) found that clear that it alone explains the evolution and maintenance epibiotic sponges experienced greater siltation and abra- of the relationship. sion when the host scallop was attached to the seabed. The predation model assumes that sponge covering Because of their £at morphology, Mycale adhaerens and e¡ectively deters seastar predators. However, the sponges Myxilla incrustans may be particularly vulnerable to sedi- covering C. hastata do not deter more aggressive species. ments. In the Puget Sound, strong river input, heavy preci- Bloom (1975) found that Pycnopodia helianthoides, a common pitation, regular algal blooms and strong tidal mixing all voracious predator, captured sponge-encrusted and unen- contribute to heavy particulate loads. We postulate that crusted scallops with equal frequency. Furthermore, it is periodic swimming of the scallop increases the tolerance Journal of the Marine Biological Association of the United Kingdom (2002) 962 D.O. Burns and B.L. Bingham Sponges and scallops in high-sediment habitats of the sponges for high sediment environments by Two-way analysis of variance (ANOVA) was used, with preventing sediments from accumulating on their surfaces. site and depth as the main e¡ects, to determine whether scallop size and sponge cover di¡ered among locations. The sponge cover data were log transformed to homo- MATERIALS AND METHODS genize variances. We used orthogonal contrasts to test for Field collections di¡erences between exposed and inland sites (Eagle Point and Pile Point vs Cone Island and Cypress Reef ) and Scallops were collected from subtidal sites in the San between sites within each of these groups (Eagle Point vs Juan Archipelago, Washington, USA. Two sites (Pile Point Pile Point; Cone Island vs Cypress Reef ). and Eagle Point) were located on the exposed west side of Wehypothesized that scallop size and sponge mass could San Juan Island. Two protected sites (Cone Islands and be related to sedimentation.Toestimate sediment loads, we Cypress Reef, Figure 1) were also sampled. The west side deployed sediment collectors at all four locations. The of SanJuan Island is in£uenced by clear waters of the open collectors were PVC tubes (5.0 cm inside diameterÂ39 cm North Paci¢c Ocean and is known by SCUBA divers as an tall) capped on the bottom end. They were attached to area of unusually good visibility. In contrast, the inshore lines weighted by cement blocks and held upright by £oats. sites of Rosario Strait and Bellingham Channel are heavily Three collectors were placed at 18 m and 24 m at each loca- in£uenced by in£ow of several large rivers, which contri- tion. They were left in place for seven days (26 November^ butes to nutrient loads, algal blooms and high turbidity. 3 December, 2001). At each study site, SCUBA divers collected 25 Chlamys In the laboratory, we allowed the collected sediments to hastata from depths of 18 and 24 metres. The scallops were settle then transferred them to pre-weighed aluminium taken to the Shannon Point Marine Center where they were pans. The samples were dried at 608C for 96 h then identi¢ed to species. We measured height of each scallop reweighed to determine dry sediment weight. We used 2- (dorsal hinge to the furthest point on the ventral margin) way ANOVA to test for di¡erences in sedimentation as a and determined the species of encrusting sponges. We used function of site and depth. Data were log-transformed to a contingency table to test for site-related di¡erences in homogenize variances. distributions of the two epibiotic sponges. The factors were sponge species (Mycale adhaerens or Myxilla incrustans)and site (Eagle Point, Pile Point, Cone Island or Cypress Reef ). Scallop behaviour Each scallop/sponge association was assigned to one cell in In the laboratory, we observed C. hastata spontaneously the table since only one sponge species was present on any clapping its valves or swimming around the tank. Todeter- scallop. mine how frequently these behaviours occur, we placed six Toquantify sponge cover, we calculated the surface area sponge-encrusted C. hastata in a 50Â26Â30
Load more

Recommended publications
  • National Monitoring Program for Biodiversity and Non-Indigenous Species in Egypt
    UNITED NATIONS ENVIRONMENT PROGRAM MEDITERRANEAN ACTION PLAN REGIONAL ACTIVITY CENTRE FOR SPECIALLY PROTECTED AREAS National monitoring program for biodiversity and non-indigenous species in Egypt PROF. MOUSTAFA M. FOUDA April 2017 1 Study required and financed by: Regional Activity Centre for Specially Protected Areas Boulevard du Leader Yasser Arafat BP 337 1080 Tunis Cedex – Tunisie Responsible of the study: Mehdi Aissi, EcApMEDII Programme officer In charge of the study: Prof. Moustafa M. Fouda Mr. Mohamed Said Abdelwarith Mr. Mahmoud Fawzy Kamel Ministry of Environment, Egyptian Environmental Affairs Agency (EEAA) With the participation of: Name, qualification and original institution of all the participants in the study (field mission or participation of national institutions) 2 TABLE OF CONTENTS page Acknowledgements 4 Preamble 5 Chapter 1: Introduction 9 Chapter 2: Institutional and regulatory aspects 40 Chapter 3: Scientific Aspects 49 Chapter 4: Development of monitoring program 59 Chapter 5: Existing Monitoring Program in Egypt 91 1. Monitoring program for habitat mapping 103 2. Marine MAMMALS monitoring program 109 3. Marine Turtles Monitoring Program 115 4. Monitoring Program for Seabirds 118 5. Non-Indigenous Species Monitoring Program 123 Chapter 6: Implementation / Operational Plan 131 Selected References 133 Annexes 143 3 AKNOWLEGEMENTS We would like to thank RAC/ SPA and EU for providing financial and technical assistances to prepare this monitoring programme. The preparation of this programme was the result of several contacts and interviews with many stakeholders from Government, research institutions, NGOs and fishermen. The author would like to express thanks to all for their support. In addition; we would like to acknowledge all participants who attended the workshop and represented the following institutions: 1.
    [Show full text]
  • Effects of Sponge Encrustation on the Swimming Behaviour, Energetics
    Western Washington University Masthead Logo Western CEDAR Environmental Sciences Faculty and Staff Environmental Sciences Publications 6-2002 Effects of Sponge Encrustation on the Swimming Behaviour, Energetics and Morphometry of the Scallop Chlamys Hastata Deborah Anne Donovan Western Washington University, [email protected] Brian L. Bingham Western Washington University, [email protected] Heather M. (Heather Maria) Farren Western Washington University Rodolfo Gallardo University of Maryland Eastern Shore Veronica L. Vigilant Southampton College Follow this and additional works at: https://cedar.wwu.edu/esci_facpubs Part of the Environmental Sciences Commons Recommended Citation Donovan, Deborah Anne; Bingham, Brian L.; Farren, Heather M. (Heather Maria); Gallardo, Rodolfo; and Vigilant, Veronica L., "Effects of Sponge Encrustation on the Swimming Behaviour, Energetics and Morphometry of the Scallop Chlamys Hastata" (2002). Environmental Sciences Faculty and Staff Publications. 2. https://cedar.wwu.edu/esci_facpubs/2 This Article is brought to you for free and open access by the Environmental Sciences at Western CEDAR. It has been accepted for inclusion in Environmental Sciences Faculty and Staff ubP lications by an authorized administrator of Western CEDAR. For more information, please contact [email protected]. J. Mar. Biol. Ass. U. K. >2002), 82,469^476 Printed in the United Kingdom E¡ects of sponge encrustation on the swimming behaviour, energetics and morphometry of the scallop Chlamys hastata ½ O Deborah A. Donovan* , Brian L. Bingham , Heather M. Farren*, Rodolfo GallardoP and Veronica L. Vigilant *Department of Biology, MS 9160, Western Washington University, Bellingham, WA 98225, USA. ODepartment of Environmental Sciences, MS 9081, Western Washington University, Bellingham, WA 98225, USA. P Department of Natural Resources, University of Maryland, Eastern Shore, Princess Anne, MD 21853, USA.
    [Show full text]
  • Taxonomy and Diversity of the Sponge Fauna from Walters Shoal, a Shallow Seamount in the Western Indian Ocean Region
    Taxonomy and diversity of the sponge fauna from Walters Shoal, a shallow seamount in the Western Indian Ocean region By Robyn Pauline Payne A thesis submitted in partial fulfilment of the requirements for the degree of Magister Scientiae in the Department of Biodiversity and Conservation Biology, University of the Western Cape. Supervisors: Dr Toufiek Samaai Prof. Mark J. Gibbons Dr Wayne K. Florence The financial assistance of the National Research Foundation (NRF) towards this research is hereby acknowledged. Opinions expressed and conclusions arrived at, are those of the author and are not necessarily to be attributed to the NRF. December 2015 Taxonomy and diversity of the sponge fauna from Walters Shoal, a shallow seamount in the Western Indian Ocean region Robyn Pauline Payne Keywords Indian Ocean Seamount Walters Shoal Sponges Taxonomy Systematics Diversity Biogeography ii Abstract Taxonomy and diversity of the sponge fauna from Walters Shoal, a shallow seamount in the Western Indian Ocean region R. P. Payne MSc Thesis, Department of Biodiversity and Conservation Biology, University of the Western Cape. Seamounts are poorly understood ubiquitous undersea features, with less than 4% sampled for scientific purposes globally. Consequently, the fauna associated with seamounts in the Indian Ocean remains largely unknown, with less than 300 species recorded. One such feature within this region is Walters Shoal, a shallow seamount located on the South Madagascar Ridge, which is situated approximately 400 nautical miles south of Madagascar and 600 nautical miles east of South Africa. Even though it penetrates the euphotic zone (summit is 15 m below the sea surface) and is protected by the Southern Indian Ocean Deep- Sea Fishers Association, there is a paucity of biodiversity and oceanographic data.
    [Show full text]
  • Marine Animal Behaviour in a High CO2 Ocean
    Vol. 536: 259–279, 2015 MARINE ECOLOGY PROGRESS SERIES Published September 29 doi: 10.3354/meps11426 Mar Ecol Prog Ser REVIEW Marine animal behaviour in a high CO2 ocean Jeff C. Clements*, Heather L. Hunt Department of Biology, University of New Brunswick Saint John Campus, 100 Tucker Park Road, Saint John E2L 4L5, NB, Canada ABSTRACT: Recently, the effects of ocean acidification (OA) on marine animal behaviour have garnered considerable attention, as they can impact biological interactions and, in turn, ecosystem structure and functioning. We reviewed current published literature on OA and marine behaviour and synthesize current understanding of how a high CO2 ocean may impact animal behaviour, elucidate critical unknowns, and provide suggestions for future research. Although studies have focused equally on vertebrates and invertebrates, vertebrate studies have primarily focused on coral reef fishes, in contrast to the broader diversity of invertebrate taxa studied. A quantitative synthesis of the direction and magnitude of change in behaviours from current conditions under OA scenarios suggests primarily negative impacts that vary depending on species, ecosystem, and behaviour. The interactive effects of co-occurring environmental parameters with increasing CO2 elicit effects different from those observed under elevated CO2 alone. Although 12% of studies have incorporated multiple factors, only one study has examined the effects of carbonate system variability on the behaviour of a marine animal. Altered GABAA receptor functioning under elevated CO2 appears responsible for many behavioural responses; however, this mechanism is unlikely to be universal. We recommend a new focus on determining the effects of elevated CO2 on marine animal behaviour in the context of multiple environmental drivers and future carbonate system variability, and the mechanisms governing the association between acid-base regulation and GABAA receptor functioning.
    [Show full text]
  • Chlamys Varia and Pecten Maximus Exposed Through Seawater, Food And/Or Sediment, Depending of Their
    Journal of Experimental Marine Biology and Ecology Archimer December 2007, Volume 353, Issue 1, Pages 58-67 Archive Institutionnelle de l’Ifremer http://dx.doi.org/10.1016/j.jembe.2007.09.001 http://www.ifremer.fr/docelec/ © 2007 Elsevier B.V. All rights reserved. Interspecific comparison of Cd bioaccumulation in European Pectinidae (Chlamys varia and Pecten maximus) ailable on the publisher Web site Marc Metianab, Michel Warnaub, François Oberhänslib, Jean-Louis Teyssiéb and Paco a, * Bustamante aCentre de Recherche sur les Ecosystèmes Littoraux Anthropisés, UMR 6217, CNRS-IFREMER-Université de La Rochelle, 22 avenue Michel Crépeau, F-17042 La Rochelle Cedex 01, France bInternational Atomic Energy Agency-Marine Environment Laboratories, 4 Quai Antoine Ier, MC-98000 Principality of Monaco *: Corresponding author : P. Bustamante, email address : [email protected] blisher-authenticated version is av Abstract: The uptake and loss kinetics of Cd were determined in two species of scallops from the European coasts, the variegated scallop Chlamys varia and the king scallop Pecten maximus, following exposures via seawater, phytoplankton and sediment using highly sensitive radiotracer techniques (109Cd). Results indicate that, for seawater and dietary pathways, C. varia displays higher bioaccumulation capacities in terms of uptake rate from water and fraction absorbed from ingested food (assimilation efficiency) than Pecten maximus. Regarding sediment exposure, P. maximus displayed low steady-state Cd transfer factor (TFSS < 1); however, once incorporated, a very large part of Cd transferred from sediment (92%) was strongly retained within P. maximus tissues. Both species showed a high retention capacity for Cd (biological half-life, Tb1/2 > 4 months), suggesting efficient mechanisms of detoxification and storage in both species.
    [Show full text]
  • Observations on the Gorgonian Coral Primnoa Pacifica at the Knight Inlet Sill, British Columbia 2008 to 2013
    Observations on the Gorgonian Coral Primnoa pacifica at the Knight Inlet sill, British Columbia 2008 to 2013 By Neil McDaniel1 and Doug Swanston2 May 1, 2013 Background The fjords of British Columbia are glacially-carved troughs that snake their way through the coastal mountains, attaining depths as great as 760 m. Knight Inlet is especially long, extending 120 km northeast from an entrance located 240 km northwest of Vancouver, near the north end of Vancouver Island. Despite a maximum depth of 540 m it has a relatively shallow sill lying between Hoeya Head and Prominent Point with a maximum depth of only 65 m. Due to the shallow nature of the sill, tidal currents frequently exceed 0.5 m/second. ____________________ 1 [email protected] 2 [email protected] 1 The site has been of particular interest to oceanographers as the classical shape of this sill results in the presence of internal gravity waves and other interesting hydraulic phenomena (Thompson, 1981). As a result, university and federal government scientists have undertaken a number of oceanographic surveys of these features. In the early 1980s researchers surveying the depths of Knight Inlet with the submersible Pisces IV encountered large fans of gorgonian coral on the flanks of the sill at depths of 65 to 200 m (Tunnicliffe and Syvitski, 1983). Boulders of various sizes were found scattered over the sill, many colonized by impressive fans of Primnoa, the largest 3 m across. The fact that this gorgonian coral was present was noteworthy, but the scientists observed something else extremely curious. Behind some of the boulders were long drag marks, evidence that when the coral fan on a particular boulder became big enough it acted like a sail in the tidal currents.
    [Show full text]
  • Do Sea Otters Forage According to Prey’S Nutritional Value?
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Repositório Institucional da Universidade de Aveiro Universidade de Aveiro Departamento de Biologia 2016 Bárbara Cartagena As lontras-marinhas escolhem as suas presas de da Silva Matos acordo com o valor nutricional? Do sea otters forage according to prey’s nutritional value? DECLARAÇÃO Declaro que este relatório é integralmente da minha autoria, estando devidamente referenciadas as fontes e obras consultadas, bem como identificadas de modo claro as citações dessas obras. Não contém, por isso, qualquer tipo de plágio quer de textos publicados, qualquer que seja o meio dessa publicação, incluindo meios eletrónicos, quer de trabalhos académicos. Universidade de Aveiro Departamento de Biologia 2016 Bárbara Cartagena da As lontras-marinhas escolhem as suas presas de Silva Matos acordo com o valor nutricional? Do sea otters forage according to prey’s nutritional value? Dissertação apresentada à Universidade de Aveiro para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Ecologia Aplicada, realizada sob a orientação científica da Doutora Heidi Christine Pearson, Professora Auxiliar da University of Alaska Southeast (Alasca, Estados Unidos da América) e do Doutor Carlos Manuel Martins Santos Fonseca, Professor Associado com Agregação do Departamento de Biologia da Universidade de Aveiro (Aveiro, Portugal). Esta pesquisa foi realizada com o apoio financeiro da bolsa de investigação Fulbright Portugal. “Two years he walks the earth. No phone, no pool, no pets, no cigarettes. Ultimate freedom. An extremist. An aesthetic voyager whose home is the road. Escaped from Atlanta. Thou shalt not return, 'cause "the West is the best." And now after two rambling years comes the final and greatest adventure.
    [Show full text]
  • Scacchi, Species Solecurtidae
    BASTERIA, 58: 35-40, 1994 Solecurtus multistriatus (Scacchi, 1835), a good marine bivalve species from the Mediterranean Sea (Bivalvia, Heterodonta: Solecurtidae) Paolo Mariottini 1 Istituto di Scienze Biochimiche, Universita di Parma, 1-43100 Parma, Italy Carlo Smriglio Via di Valle Aurelia 134, 1-00167 Rome, Italy & Cesare Ciommei Via Montebruno 12, 1-00168 Rome, Italy Solecurtus multistriatus (Scacchi, 1835) from the Mediterranean Sea is here reported as a bona fide species; the authors give additional data about its morphology, ecology and distribution. Key words: Bivalvia, Solecurtidae, Solecurtus, morphology, distribution, Mediterranean Sea, Italy. INTRODUCTION In the Mediterranean Sea the genus Solecurtus Blainville, 1824, is represented by three species: S. scopula (Turton, 1822), S. strigilatus (Linne, 1758) and S. multistriatus (Scacchi, 1835). The last taxon was based by Scacchi (1835) (and not Scacchi, 1834, according to Cretella et ah, 1992) on a fossil specimen collected near Gravina, Puglia (Italy). Here the original description is given: "Testa ovali-oblonga, subaequilatera, antice oblique striata, striis approximatis angulo acuto in/lexis. Lata lin. 8, alta lin. 3". In the description 'lin.' (which stands for linea) is a standard size unit. The one adopted by the authors of that time corresponded to 2.25 mm; but, in this case, it is also possible that 'linea' represents a local Sicilian size unit (1.8 mm) as reported by Giannuzzi-Savelli et al. (1986). The author clearly stated that this species differs from the fossil and Recent specimens of "Solene bianco del Renieri" candidus of S. and of [S. (Renier, 1804), synonym scopula] "Solene strigilato" (S. strigilatus) . Nowadays the status of S.
    [Show full text]
  • Appendix 3 Marine Spcies Lists
    Appendix 3 Marine Species Lists with Abundance and Habitat Notes for Provincial Helliwell Park Marine Species at “Wall” at Flora Islet and Reef Marine Species at Norris Rocks Marine Species at Toby Islet Reef Marine Species at Maude Reef, Lambert Channel Habitats and Notes of Marine Species of Helliwell Provincial Park Helliwell Provincial Park Ecosystem Based Plan – March 2001 Marine Species at wall at Flora Islet and Reef Common Name Latin Name Abundance Notes Sponges Cloud sponge Aphrocallistes vastus Abundant, only local site occurance Numerous, only local site where Chimney sponge, Boot sponge Rhabdocalyptus dawsoni numerous Numerous, only local site where Chimney sponge, Boot sponge Staurocalyptus dowlingi numerous Scallop sponges Myxilla, Mycale Orange ball sponge Tethya californiana Fairly numerous Aggregated vase sponge Polymastia pacifica One sighting Hydroids Sea Fir Abietinaria sp. Corals Orange sea pen Ptilosarcus gurneyi Numerous Orange cup coral Balanophyllia elegans Abundant Zoanthids Epizoanthus scotinus Numerous Anemones Short plumose anemone Metridium senile Fairly numerous Giant plumose anemone Metridium gigantium Fairly numerous Aggregate green anemone Anthopleura elegantissima Abundant Tube-dwelling anemone Pachycerianthus fimbriatus Abundant Fairly numerous, only local site other Crimson anemone Cribrinopsis fernaldi than Toby Islet Swimming anemone Stomphia sp. Fairly numerous Jellyfish Water jellyfish Aequoria victoria Moon jellyfish Aurelia aurita Lion's mane jellyfish Cyanea capillata Particuilarly abundant
    [Show full text]
  • Comparative Ultrastructure of the Spermatogenesis of Three Species of Poecilosclerida (Porifera, Demospongiae)
    See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/329545710 Comparative ultrastructure of the spermatogenesis of three species of Poecilosclerida (Porifera, Demospongiae) Article in Zoomorphology · December 2018 DOI: 10.1007/s00435-018-0429-4 CITATION READS 1 72 4 authors: Vivian Vasconcellos Philippe Willenz Universidade Federal da Bahia Royal Belgian Institute of Natural Sciences 6 PUBLICATIONS 118 CITATIONS 85 PUBLICATIONS 1,200 CITATIONS SEE PROFILE SEE PROFILE Alexander V Ereskovsky Emilio Lanna French National Centre for Scientific Research Universidade Federal da Bahia 202 PUBLICATIONS 3,317 CITATIONS 31 PUBLICATIONS 228 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: Organization and patterning of sponge epithelia View project Sponges from Peru - Esponjas del Perú View project All content following this page was uploaded by Alexander V Ereskovsky on 25 April 2020. The user has requested enhancement of the downloaded file. Zoomorphology https://doi.org/10.1007/s00435-018-0429-4 ORIGINAL PAPER Comparative ultrastructure of the spermatogenesis of three species of Poecilosclerida (Porifera, Demospongiae) Vivian Vasconcellos1,2 · Philippe Willenz3,4 · Alexander Ereskovsky5,6 · Emilio Lanna1,2 Received: 15 August 2018 / Revised: 26 November 2018 / Accepted: 30 November 2018 © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract The spermatogenesis of Porifera is still relatively poorly understood. In the past, it was accepted that all species presented a primitive-type spermatozoon, lacking special structures and acrosome. Nonetheless, a very peculiar spermatogenesis resulting in a sophisticated V-shaped spermatozoon with an acrosome was found in Poecilosclerida.
    [Show full text]
  • Concentration and Distribution of 210Po in The
    Concentration and distribution of 210Po in the tissues of the scallop Chlamys varia and the mussel Mytilus edulis from the coasts of Charente-Maritime (France) Paco Bustamante, Pierre Germain, Gaël Leclerc, Pierre Miramand To cite this version: Paco Bustamante, Pierre Germain, Gaël Leclerc, Pierre Miramand. Concentration and distribu- tion of 210Po in the tissues of the scallop Chlamys varia and the mussel Mytilus edulis from the coasts of Charente-Maritime (France). Marine Pollution Bulletin, Elsevier, 2002, 44 (10), pp.997- 1002. 10.1016/S0025-326X(02)00135-2. hal-00186632 HAL Id: hal-00186632 https://hal.archives-ouvertes.fr/hal-00186632 Submitted on 10 Nov 2007 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. 1 Concentration and distribution of 210 Po in the tissues of the scallop Chlamys varia and the mussel Mytilus edulis from the coasts of Charente-Maritime (France) Bustamante P* a, Germain P b, Leclerc G b, Miramand P a a Laboratoire de Biologie et d'Environnement Marins, UPRES-EA 3168, Université de La Rochelle, 22, Avenue Michel Crépeau, 17042 La Rochelle Cedex, France * Corresponding author. Tel./Fax: +33 546-500-294 ; e-mail: [email protected] b Institut de Protection et de Sûreté Nucléaire, Département de Protection de l'Environnement, LERFA, Rue Max Pol Fouchet, BP 10, 50130 Cherbourg-Octeville, France Abstract : 210 Po have been analysed in the soft parts of two bivalves species, the scallop Chlamys varia and the common mussel Mytilus edulis , coming from the Bay of La Rochelle and the Ré Island, on the French Atlantic coast.
    [Show full text]
  • Embryonic and Larval Development of Ensis Arcuatus (Jeffreys, 1865) (Bivalvia: Pharidae)
    EMBRYONIC AND LARVAL DEVELOPMENT OF ENSIS ARCUATUS (JEFFREYS, 1865) (BIVALVIA: PHARIDAE) FIZ DA COSTA, SUSANA DARRIBA AND DOROTEA MARTI´NEZ-PATIN˜O Centro de Investigacio´ns Marin˜as, Consellerı´a de Pesca e Asuntos Marı´timos, Xunta de Galicia, Apdo. 94, 27700 Ribadeo, Lugo, Spain (Received 5 December 2006; accepted 19 November 2007) ABSTRACT The razor clam Ensis arcuatus (Jeffreys, 1865) is distributed from Norway to Spain and along the British coast, where it lives buried in sand in low intertidal and subtidal areas. This work is the first study to research the embryology and larval development of this species of razor clam, using light and scanning electron microscopy. A new method, consisting of changing water levels using tide simulations with brief Downloaded from https://academic.oup.com/mollus/article/74/2/103/1161011 by guest on 23 September 2021 dry periods, was developed to induce spawning in this species. The blastula was the first motile stage and in the gastrula stage the vitelline coat was lost. The shell field appeared in the late gastrula. The trocho- phore developed by about 19 h post-fertilization (hpf) (198C). At 30 hpf the D-shaped larva showed a developed digestive system consisting of a mouth, a foregut, a digestive gland followed by an intestine and an anus. Larvae spontaneously settled after 20 days at a length of 378 mm. INTRODUCTION following families: Mytilidae (Redfearn, Chanley & Chanley, 1986; Fuller & Lutz, 1989; Bellolio, Toledo & Dupre´, 1996; Ensis arcuatus (Jeffreys, 1865) is the most abundant species of Hanyu et al., 2001), Ostreidae (Le Pennec & Coatanea, 1985; Pharidae in Spain.
    [Show full text]