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Grebmeier, Jacqueline M., Lee W.Cooper, and Michael J
Limnol. Oceanogr., 35(S), 1990, 1 182-1195 0 1990, by the American Society of Limnology and Oceanography, Inc. Oxygen isotopic composition of bottom seawater and tunicate cellulose used as indicators of water masses in the northern Bering and Chukchi Seas Abstract -Oxygen isotopic composition of rivers, evaporated surface ocean waters, bottom seawater and tunicate cellulose were used melting glaciers, and melting sea ice can be as short-term and long-term indicators, respec- tively, of water-mass characteristics in the north- separated and water types characterized (e.g. ern Bering and Chukchi Seas. Oxygen isotopic Epstein and Mayeda 1953; Tan and Strain composition of northeastern Bering Sea waters is 1980; Bedard et al. 198 1). In contrast to the influenced by Yukon River inflows of IsO-de- variability in the surface ocean, average 180 : pleted continental water mixing with relatively 180-enriched waters contributed by the Anadyr 160 ratios for the deep (> 500 m) sea vary Current. Tunicate cellulose sampled under Alas- by < 1%~ when expressed in the conven- ka coastal water is more depleted in IsO than that tional 6 notation: collected under Bering shelf and Anadyr waters, which reflects the oxygen isotopic composition 6180 = (Rstd/R,mple- 1) X 1030/oo (1) of these waters. Tunicate cellulose collected un- der the mixed Bering shelf water displays inter- where R = 180 : l 6O and std is Standard Mean mediate 6180 values. Oxygen isotopic analyses of Ocean Water (SMOW). The low variability bottom seawater were used to determine the spa- in V80 values of waters in the deep sea has tial location and influence of continental and led to widespread use of oxygen isotopes as coastal-derived precipitation and of sea-ice for- mation on water-mass structure on the continen- a paleothermometric indicator. -
Temperature and Salinity Sensitivity of the Invasive Ascidian Microcosmus Exasperatus Heller, 1878
Aquatic Invasions (2016) Volume 11, Issue 1: 33–43 DOI: http://dx.doi.org/10.3391/ai.2016.11.1.04 Open Access © 2016 The Author(s). Journal compilation © 2016 REABIC Research Article Temperature and salinity sensitivity of the invasive ascidian Microcosmus exasperatus Heller, 1878 1 1,2 Lilach Raijman Nagar and Noa Shenkar * 1Department of Zoology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv, 69978, Israel 2The Steinhardt Museum of Natural History and National Research Center, Tel Aviv University, Tel Aviv, Israel *Corresponding author E-mail: [email protected] Received: 5 May 2015 / Accepted: 24 November 2015 / Published online: 30 December 2015 Handling editor: Vadim Panov Abstract Environmental factors, such as temperature and salinity, are known to influence distribution patterns and invasion success in ascidians. The solitary ascidian Microcosmus exasperatus Heller, 1878 has a wide global distribution and can be found in both tropical and sub-tropical waters. In the Mediterranean Sea, it is considered to be an invasive species introduced through the Suez Canal, with a restricted distribution in the eastern Mediterranean. Despite its global distribution, the environmental tolerances of this species are poorly known. We examined the effect of varying temperature and salinity on the survival of adult individuals of M. exasperatus in a laboratory setting to partially determine its environmental tolerance range. In addition, it’s global and local distribution as well as the seasonal abundance in ‘Akko Bay (northern Mediterranean coast of Israel) were examined. Field observations and laboratory experiments show that M. exasperatus is able to tolerate a temperature range of 12–30 ºC, and salinity of 37–45, but it survived poorly in salinity of 33–35 and temperatures > 32 ºC. -
Life-History Strategies of a Native Marine Invertebrate Increasingly Exposed to Urbanisation and Invasion
Temporal Currency: Life-history strategies of a native marine invertebrate increasingly exposed to urbanisation and invasion A thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Zoology University of Canterbury New Zealand Jason Suwandy 2012 Contents List of Figures ......................................................................................................................................... iii List of Tables .......................................................................................................................................... vi Acknowledgements ............................................................................................................................... vii Abstract ................................................................................................................................................ viii CHAPTER ONE - General Introduction .................................................................................................... 1 1.1 Marine urbanisation and invasion ................................................................................................ 2 1.2 Successful invasion and establishment of populations ................................................................ 4 1.3 Ascidians ....................................................................................................................................... 7 1.4 Native ascidians as study organisms ............................................................................................ -
Oikopleura Dioica: a Plankton Predator That
Flexibility of gene arangement in the genome of Oikopleura dioica Charles Plessy and the Luscombe Laboratory (group authorship). Okinawa Institute of Science and Technology Graduate University (OIST) 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, Japan 904-0495 Oikopleura dioica in brief: - Japanese name: オタマボヤ Oikopleura dioica: a plankton predator that: - Oikopleura dioica is a globally distributed marine animal. It is evolutionarily closer to human than are lives in a house has a muscular tail, never sleeps and releases model organisms such as yeast, nematodes or fruit flies. As it belongs to the chordate phylum it has made with cellulose for flowing food to its mouth its gametes in only 5 days features common with vertebrate embryonic development, such as a dorsal nerve cord, or the formation of a muscular tail supported by a notochord. - Ecological importance: O. dioica is a small filter feeder that can account for up to 10 % of the total carbon mass in an area. It eats unicellular plankton and was reported to be able to ingest bacterial viruses and microplastics as well. Being an extremely efficient predator, it has an important role in the carbon chain, by producing organic matter (fecal pellet and "houses") that sediment to the sea floor. - Evolution: as it belongs to the tunicate phylum, it is among the invertebrates that are evolutionary closest to humans. Tunicates, like vertebrates are chordates: they have a muscular tail. They also have a brain, a heart, a gut, etc. - Compact genome: only 70 Mb. Nevertheless, it contains 18,020 predicted genes, which makes it an intersting model to study how to compactly encode functions homologous to some found in vertebrates. -
Ascidian News #87 June 2021
ASCIDIAN NEWS* Gretchen Lambert 12001 11th Ave. NW, Seattle, WA 98177 206-365-3734 [email protected] home page: http://depts.washington.edu/ascidian/ Number 87 June 2021 Well, here we are still in this pandemic! I asked how you all are and again received many responses. A number are included in the next two sections. Nearly everyone still expresses confidence at having met the challenges and a great feeling of accomplishment even though tired of the whole thing; congratulations to you all! There are 117 new publications since December! Thanks to so many for the contributions and for letting me know how important AN continues to be. Please keep in touch and continue to send me contributions for the next issue. Keep safe, keep working, and good luck to everyone. *Ascidian News is not part of the scientific literature and should not be cited as such. NEWS AND VIEWS 1. From Hiroki Nishida ([email protected]) : In Japan, we are very slow to be vaccinated, but the labs are ordinarily opened and we can continue working. Number of patients are gradually increasing though and we are waiting for vaccines. I have to stay in my home and the lab. Postponement of 11th ITM (International Tunicate Meeting) This is an announcement about 11th ITM that had been planned to be held in July 2021 in Kobe, Japan. It is postponed by a year because of the global spread of COVID-19. We had an 11th ITM board meeting, and came to the conclusion that we had to reschedule it for July 2022 at the same venue (Konan University, Kobe, Japan) and similar dates (July 11 to 16). -
Ascidian-Associated Polychaetes
See discussions, stats, and author profiles for this publication at: http://www.researchgate.net/publication/267868444 Ascidian-associated polychaetes: ecological implications of aggregation size and tube- building chaetopterids on assemblage structure in the Southeastern Pacific Ocean ARTICLE in MARINE BIODIVERSITY · OCTOBER 2014 Impact Factor: 1.1 · DOI: 10.1007/s12526-014-0283-7 READS 80 5 AUTHORS, INCLUDING: Nicolas Rozbaczylo Christian M. Ibáñez Pontifical Catholic University of Chile Universidad Andrés Bello 63 PUBLICATIONS 373 CITATIONS 42 PUBLICATIONS 298 CITATIONS SEE PROFILE SEE PROFILE Marcelo A. Flores Juan M Cancino Universidad Andrés Bello Catholic University of the Most Holy Conce… 14 PUBLICATIONS 23 CITATIONS 46 PUBLICATIONS 742 CITATIONS SEE PROFILE SEE PROFILE All in-text references underlined in blue are linked to publications on ResearchGate, Available from: Roger D. Sepúlveda letting you access and read them immediately. Retrieved on: 28 December 2015 Mar Biodiv DOI 10.1007/s12526-014-0283-7 ORIGINAL PAPER Ascidian-associated polychaetes: ecological implications of aggregation size and tube-building chaetopterids on assemblage structure in the Southeastern Pacific Ocean Roger D. Sepúlveda & Nicolás Rozbaczylo & Christian M. Ibáñez & Marcelo Flores & Juan M. Cancino Received: 13 May 2014 /Revised: 13 October 2014 /Accepted: 20 October 2014 # Senckenberg Gesellschaft für Naturforschung and Springer-Verlag Berlin Heidelberg 2014 Abstract Epifaunal polychaetes inhabit a range of habitat chaetopterid tubes influenced the -
1 Phylogeny of the Families Pyuridae and Styelidae (Stolidobranchiata
* Manuscript 1 Phylogeny of the families Pyuridae and Styelidae (Stolidobranchiata, Ascidiacea) 2 inferred from mitochondrial and nuclear DNA sequences 3 4 Pérez-Portela Ra, b, Bishop JDDb, Davis ARc, Turon Xd 5 6 a Eco-Ethology Research Unit, Instituto Superior de Psicologia Aplicada (ISPA), Rua 7 Jardim do Tabaco, 34, 1149-041 Lisboa, Portugal 8 9 b Marine Biological Association of United Kingdom, The Laboratory Citadel Hill, PL1 10 2PB, Plymouth, UK, and School of Biological Sciences, University of Plymouth PL4 11 8AA, Plymouth, UK 12 13 c School of Biological Sciences, University of Wollongong, Wollongong NSW 2522 14 Australia 15 16 d Centre d’Estudis Avançats de Blanes (CSIC), Accés a la Cala St. Francesc 14, Blanes, 17 Girona, E-17300, Spain 18 19 Email addresses: 20 Bishop JDD: [email protected] 21 Davis AR: [email protected] 22 Turon X: [email protected] 23 24 Corresponding author: 25 Rocío Pérez-Portela 26 Eco-Ethology Research Unit, Instituto Superior de Psicologia Aplicada (ISPA), Rua 27 Jardim do Tabaco, 34, 1149-041 Lisboa, Portugal 28 Phone: + 351 21 8811226 29 Fax: + 351 21 8860954 30 [email protected] 31 1 32 Abstract 33 34 The Order Stolidobranchiata comprises the families Pyuridae, Styelidae and Molgulidae. 35 Early molecular data was consistent with monophyly of the Stolidobranchiata and also 36 the Molgulidae. Internal phylogeny and relationships between Styelidae and Pyuridae 37 were inconclusive however. In order to clarify these points we used mitochondrial and 38 nuclear sequences from 31 species of Styelidae and 25 of Pyuridae. Phylogenetic trees 39 recovered the Pyuridae as a monophyletic clade, and their genera appeared as 40 monophyletic with the exception of Pyura. -
Time Or Space?
fmars-08-657411 April 16, 2021 Time: 17:33 # 1 ORIGINAL RESEARCH published: 22 April 2021 doi: 10.3389/fmars.2021.657411 Time or Space? Relative Importance of Geographic Distribution and Interannual Variation in Three Lineages of the Ascidian Pyura chilensis in the Southeast Pacific Coast Pilar A. Haye1,2, Xavier Turon3 and Nicolás I. Segovia1,2,4* 1 Departamento de Biología Marina, Facultad de Ciencias de Mar, Universidad Católica del Norte, Coquimbo, Chile, 2 Instituto Milenio en Socio-ecología Costera (SECOS), Santiago, Chile, 3 Centre for Advanced Studies of Blanes (CEAB, CSIC), Blanes, Spain, 4 Instituto de Ecología y Biodiversidad (IEB), Santiago, Chile Spatial and temporal variation of environmental parameters can affect dispersal, Edited by: recruitment and population persistence of marine benthic species. Studies including Sandie M. Degnan, The University of Queensland, inter-annual comparisons of genetic structure often indicate high/moderate temporal Australia heterogeneity in marine invertebrates, which may be a prevailing pattern. This Reviewed by: suggests that temporal studies are necessary to understand the dynamics of marine Pablo Saenz-Agudelo, metapopulations. In this study, we analyzed the spatio-temporal genetic structure of Austral University of Chile, Chile Carlos Vergara-Chen, the ascidian Pyura chilensis, a low dispersal sessile marine species endemic from the Technological University of Panama, Southeast Pacific coast and highly demanded for human consumption. We sequenced Panama S. López-Legentil, a fragment of the mitochondrial gene Cytochrome Oxidase I (COI) from 1,005 individuals University of North Carolina of six locations (30–40 individuals per site and year) spanning a wide latitudinal range at Wilmington, United States (24◦–42◦S) and sampled over 5 years (2012, 2014, 2015, 2016, and 2017). -
Ascidiacea: Pyuridae), a Deep‐Water Ascidian from the Fjords and Sounds of British Columbia
FAU Institutional Repository http://purl.fcla.edu/fau/fauir This paper was submitted by the faculty of FAU’s Harbor Branch Oceanographic Institute. Notice: ©1995 John Wiley & Sons, Inc. This manuscript is an author version and may be cited as: Young, C. M., & Vazquez, E. (1995). Morphology, larval development and distribution of Bathypera feminalba n. sp. (Ascidiacea: Pyuridae), a deep‐water ascidian from the fjords and sounds of British Columbia. Invertebrate Biology, 114(1), 89‐106. Invertebrate Biology 114(1): 89-106. ? 1995 American Microscopical Society, Inc. Morphology, larval development, and distribution of Bathypera feminalba n. sp. (Ascidiacea: Pyuridae), a deep-water ascidian from the fjords and sounds of British Columbia Craig M. Young and Elsa Vazquez HarborBranch Oceanographic Institution, Ft. Pierce, Florida 34946, USA Abstract. A new species of the ascidian genus Bathypera (Ascidiacea: Pyuridae), B. feminalba, is described from deep-water habitats of Saanich Inlet and Barkley Sound, British Columbia, Canada, with data on the depth distribution, substratum use, reproduction, embryology, and larval development. The species is characterized by hourglass-shaped spicules topped with a single large spine and several smaller spines, a branchial sac with 7 folds per side, and irregular and curved stigmata. B. feminalba spawned in response to light following dark adaptation during the month of June. Development was similar to that of other pyurids. The tadpole larva, the first to be described in this genus, has the same sensory organs found in shallow-water relatives: an ocellus, a statocyst, and 3 large conical adhesive papillae. The ocellus is sensitive to monochromatic light between 475 and 600 nm with peak sensitivity in the blue region of the spectrum. -
Ascidian News #82 December 2018
ASCIDIAN NEWS* Gretchen Lambert 12001 11th Ave. NW, Seattle, WA 98177 206-365-3734 [email protected] home page: http://depts.washington.edu/ascidian/ Number 82 December 2018 A big thank-you to all who sent in contributions. There are 85 New Publications listed at the end of this issue. Please continue to send me articles, and your new papers, to be included in the June 2019 issue of AN. It’s never too soon to plan ahead. *Ascidian News is not part of the scientific literature and should not be cited as such. NEWS AND VIEWS 1. From Stefano Tiozzo ([email protected]) and Remi Dumollard ([email protected]): The 10th Intl. Tunicata Meeting will be held at the citadel of Saint Helme in Villefranche sur Mer (France), 8- 12 July 2019. The web site with all the information will be soon available, save the date! We are looking forward to seeing you here in the Riviera. A bientôt! Remi and Stefano 2. The 10th Intl. Conference on Marine Bioinvasions was held in Puerto Madryn, Patagonia, Argentina, October 16-18. At the conference website (http://www.marinebioinvasions.info/index) the program and abstracts in pdf can be downloaded. Dr. Rosana Rocha presented one of the keynote talks: "Ascidians in the anthropocene - invasions waiting to happen". See below under Meetings Abstracts for all the ascidian abstracts; my thanks to Evangelina Schwindt for compiling them. The next (11th) meeting will be in Annapolis, Maryland, organized by Greg Ruiz, Smithsonian Invasions lab, date to be determined. 3. Conference proceedings of the May 2018 Invasive Sea Squirt Conference will be peer reviewed and published in a special issue of the REABIC journal Management of Biological Invasions. -
Novel Microsatellite Markers for Pyura Chilensis Reveal Fine-Scale Genetic Structure Along the Southern Coast of Chile
Mar Biodiv DOI 10.1007/s12526-017-0672-9 ORIGINAL PAPER Novel microsatellite markers for Pyura chilensis reveal fine-scale genetic structure along the southern coast of Chile E. C. Giles1 & C. Petersen-Zúñiga1 & S. Morales-González1 & S. Quesada-Calderón1 & Pablo Saenz-Agudelo1 Received: 25 August 2016 /Revised: 22 February 2017 /Accepted: 23 February 2017 # Senckenberg Gesellschaft für Naturforschung and Springer-Verlag Berlin Heidelberg 2017 Abstract Studying the geographic scale of gene flow and here, it seems possible that genetic structure at this spatial population structure in marine populations can be a powerful scale is driven to some extent by local population dynamics tool with which to infer patterns of larval dispersal averaged (deviations from random mating and/or a large proportion of across generations. Here, we describe the development of ten larvae settling in proximity of relatives), yet infrequent long- novel polymorphic microsatellite markers for an important distance dispersal events might also be responsible for the endemic ascidian, Pyura chilensis, of the southeastern relatively weak spatial heterogeneity between sites. Overall, Pacific, and we report the results from fine-scale genetic struc- our results both highlight the utility of this new marker set for ture analysis of 151 P. chilensis individuals sampled from five population genetic studies of this species and provide new sites constituting ∼80 km of coastline in southern Chile. All evidence regarding the complexity of the small-scale popula- microsatellite markers were highly polymorphic (number of tion structure of this species. alleles ranged from 12 to 36). Our results revealed significant deviations from Hardy–Weinberg equilibrium (HWE) for Keywords Population genetics . -
Design and Implementation of a Biodiversity Information Management System: Electronic Catalogue of Known Indian Fauna – a Case Study
DESIGN AND IMPLEMENTATION OF A BIODIVERSITY INFORMATION MANAGEMENT SYSTEM: ELECTRONIC CATALOGUE OF KNOWN INDIAN FAUNA – A CASE STUDY A THESIS SUBMITTED TO THE UNIVERSITY OF PUNE FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN BIOINFORMATICS BY VISHWAS CHAVAN UNDER THE GUIDANCE OF DR. S. KRISHNAN NATIONAL CHEMICAL LABORATORY PUNE SEPTEMBER 2007 DESIGN AND IMPLEMENTATION OF A BIODIVERSITY INFORMATION MANAGEMENT SYSTEM: ELECTRONIC CATALOGUE OF KNOWN INDIAN FAUNA – A CASE STUDY A THESIS SUBMITTED TO THE UNIVERSITY OF PUNE FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN BIOINFORMATICS BY VISHWAS CHAVAN UNDER THE GUIDANCE OF DR. S. KRISHNAN NATIONAL CHEMICAL LABORATORY PUNE SEPTEMBER 2007 DECLARATION I hereby declare that the work embodied in this thesis entitled “DESIGN AND IMPLEMENTATION OF A BIODIVERSITY INFORMATION MANAGEMENT SYSTEM: ELECTRONIC CATALOGUE OF KNOWN INDIAN FAUNA – A CASE STUDY” represents original work carried out by me under the supervision of Dr. S. Krishnan, Head, Information Division, National Chemical Laboratory, Pune. It has not been submitted previously for any other research degree of this or any other University. September 25, 2007 Vishwas Chavan National Chemical Laboratory Pune 411008, INDIA CERTIFICATE Certified that the work incorporated in the thesis entitled “DESIGN AND IMPLEMENTATION OF A BIODIVERSITY INFORMATION MANAGEMENT SYSTEM: ELECTRONIC CATALOGUE OF KNOWN INDIAN FAUNA – A CASE STUDY” submitted by Mr. Vishwas Chavan, was carried out by the candidate under my supervision. Materials obtained from other sources have been duly acknowledged in the thesis. September 25, 2007 Dr. S. Krishnan Head, Information Division National Chemical Laboratory Pune 411008, INDIA Dedicated to Mother Earth who nurtures life, my parents who brought me in to this world, my teachers who taught me to understand nature, and my daughter who I believe would continue to care for life«« Acknowledgements Biodiversity informatics is a passion for me.