Phylum Chordata Bateson, 1885
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The 2014 Golden Gate National Parks Bioblitz - Data Management and the Event Species List Achieving a Quality Dataset from a Large Scale Event
National Park Service U.S. Department of the Interior Natural Resource Stewardship and Science The 2014 Golden Gate National Parks BioBlitz - Data Management and the Event Species List Achieving a Quality Dataset from a Large Scale Event Natural Resource Report NPS/GOGA/NRR—2016/1147 ON THIS PAGE Photograph of BioBlitz participants conducting data entry into iNaturalist. Photograph courtesy of the National Park Service. ON THE COVER Photograph of BioBlitz participants collecting aquatic species data in the Presidio of San Francisco. Photograph courtesy of National Park Service. The 2014 Golden Gate National Parks BioBlitz - Data Management and the Event Species List Achieving a Quality Dataset from a Large Scale Event Natural Resource Report NPS/GOGA/NRR—2016/1147 Elizabeth Edson1, Michelle O’Herron1, Alison Forrestel2, Daniel George3 1Golden Gate Parks Conservancy Building 201 Fort Mason San Francisco, CA 94129 2National Park Service. Golden Gate National Recreation Area Fort Cronkhite, Bldg. 1061 Sausalito, CA 94965 3National Park Service. San Francisco Bay Area Network Inventory & Monitoring Program Manager Fort Cronkhite, Bldg. 1063 Sausalito, CA 94965 March 2016 U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Fort Collins, Colorado The National Park Service, Natural Resource Stewardship and Science office in Fort Collins, Colorado, publishes a range of reports that address natural resource topics. These reports are of interest and applicability to a broad audience in the National Park Service and others in natural resource management, including scientists, conservation and environmental constituencies, and the public. The Natural Resource Report Series is used to disseminate comprehensive information and analysis about natural resources and related topics concerning lands managed by the National Park Service. -
Ascidian Cannibalism Correlates with Larval Behavior and Adult Distribution
FAU Institutional Repository http://purl.fcla.edu/fau/fauir This paper was submitted by the faculty of FAU’s Harbor Branch Oceanographic Institute. Notice: ©1988 Elsevier Ltd. The final published version of this manuscript is available at http://www.sciencedirect.com/science/journal/00220981 and may be cited as: Young, C. M. (1988). Ascidian cannibalism correlates with larval behavior and adult distribution. Journal of Experimental Marine Biology and Ecology, 117(1), 9-26. doi:10.1016/0022-0981(88)90068-8 J. Exp. Mar. Bioi. £Col., 1988, Vol. 117, pp. 9-26 9 Elsevier JEM 01042 Ascidian cannibalism correlates with larval behavior and adult distribution Craig M. Young Department ofLarval Ecology. Harbor Branch Oceanographic Institution, Fort Pierce, Florida. U.S.A. (Received 24 March 1987; revision received 9 December 1987; accepted 22 December 1987) Abstract: In the San Juan Islands, Washington, solitary ascidians .that occur in dense monospecific aggregations demonstrate gregarious settlement as larvae, whereas species that occur as isolated individuals do not. All gregarious species reject their own eggs and larvae as food, but nongregarious species consume conspecific eggs and larvae. Moreover, the rejection mechanism is species-specific in some cases. Correla tion analysis suggests that species specificity of the rejection response has a basis in siphon diameter, egg density, and larval size, but not in number of oral tentacles, or tentacle branching. One strongly cannibalistic species, Corella inflata Huntsman, avoids consuming its own eggs and newly released tadpoles by a unique brooding mechanism that involves floating eggs, negative geotaxis after hatching, and adult orientation. Key words: Ascidian; Cannibalism; Distribution; Larva; Settlement behavior INTRODUCTION Many sessile marine invertebrates, including filter-feeders such as mussels, oysters, barnacles and ascidians, occur in discrete, dense aggregations. -
Ascidiacea: Polyclinidae) from the Strait of Gibraltar A
Research Article Mediterranean Marine Science Indexed in WoS (Web of Science, ISI Thomson) and SCOPUS The journal is available on line at http://www.medit-mar-sc.net DOI: http://dx.doi.org/10.12681/mms.1940 A striking morphotype of Aplidium proliferum (Milne Edwards, 1841) (Ascidiacea: Polyclinidae) from the Strait of Gibraltar A. A. RAMOS-ESPLA1 and O. OCAÑA2 1 Marine Research Centre (CIMAR), University of Alicante, 03080 Alicante, Spain 2 Museo del Mar de Ceuta, Muelle España, s/n, 51001 Ceuta, Spain Corresponding author: [email protected] Handling Editor: Xavier Turon Received: 15 October 2016; Accepted: 16 December 2016; Published on line: 31 March 2017 Abstract An unusual colonial ascidian with 1-2m in length, belonging to the genus Aplidium (Ascidiacea: Polyclinidae), has been sampled from the Strait of Gibraltar (Ras Leona, Morocco). The characteristics of the colony, zooids and larvae point us to A. pro- liferum. The species seems common in the NE Atlantic from the Shetland Islands to Mediterranean Sea, but the length of colonies found in the Strait this area have not previously been observed. Probably, it is one of the longest ascidians reported worldwide. Keywords: Keywords: Ascidiacea, Polyclinidae, Aplidium, colony size, Strait of Gibraltar, Mediterranean Sea. Introduction meyer, 1924: 211. Harant & Vernières, 1933: 88. Thomp- son, 1934: 36; pl. 35, pl. 35, figs. 6-7; chart 35. Pérès, Aplidium is the genus woth the greatest number of 1956: 290, 295. known species of the class Ascidiacea, with 280 spp. Aplidium proliferum: Berrill, 1950: 102; fig. 29. Kott, (Ascidiacea World Database: www.marinespecies.org/ 1952: 74; fig. -
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 ............................................................................................ -
Halocynthia Roretzi
Sekigami et al. Zoological Letters (2017) 3:17 DOI 10.1186/s40851-017-0078-3 RESEARCH ARTICLE Open Access Hox gene cluster of the ascidian, Halocynthia roretzi, reveals multiple ancient steps of cluster disintegration during ascidian evolution Yuka Sekigami1, Takuya Kobayashi1, Ai Omi1, Koki Nishitsuji2, Tetsuro Ikuta1, Asao Fujiyama3, Noriyuki Satoh2 and Hidetoshi Saiga1* Abstract Background: Hox gene clusters with at least 13 paralog group (PG) members are common in vertebrate genomes and in that of amphioxus. Ascidians, which belong to the subphylum Tunicata (Urochordata), are phylogenetically positioned between vertebrates and amphioxus, and traditionally divided into two groups: the Pleurogona and the Enterogona. An enterogonan ascidian, Ciona intestinalis (Ci), possesses nine Hox genes localized on two chromosomes; thus, the Hox gene cluster is disintegrated. We investigated the Hox gene cluster of a pleurogonan ascidian, Halocynthia roretzi (Hr) to investigate whether Hox gene cluster disintegration is common among ascidians, and if so, how such disintegration occurred during ascidian or tunicate evolution. Results: Our phylogenetic analysis reveals that the Hr Hox gene complement comprises nine members, including one with a relatively divergent Hox homeodomain sequence. Eight of nine Hr Hox genes were orthologous to Ci-Hox1, 2, 3, 4, 5, 10, 12 and 13. Following the phylogenetic classification into 13 PGs, we designated Hr Hox genes as Hox1, 2, 3, 4, 5, 10, 11/12/13.a, 11/12/13.b and HoxX. To address the chromosomal arrangement of the nine Hox genes, we performed two-color chromosomal fluorescent in situ hybridization, which revealed that the nine Hox genes are localized on a single chromosome in Hr, distinct from their arrangement in Ci. -
The Plankton Lifeform Extraction Tool: a Digital Tool to Increase The
Discussions https://doi.org/10.5194/essd-2021-171 Earth System Preprint. Discussion started: 21 July 2021 Science c Author(s) 2021. CC BY 4.0 License. Open Access Open Data The Plankton Lifeform Extraction Tool: A digital tool to increase the discoverability and usability of plankton time-series data Clare Ostle1*, Kevin Paxman1, Carolyn A. Graves2, Mathew Arnold1, Felipe Artigas3, Angus Atkinson4, Anaïs Aubert5, Malcolm Baptie6, Beth Bear7, Jacob Bedford8, Michael Best9, Eileen 5 Bresnan10, Rachel Brittain1, Derek Broughton1, Alexandre Budria5,11, Kathryn Cook12, Michelle Devlin7, George Graham1, Nick Halliday1, Pierre Hélaouët1, Marie Johansen13, David G. Johns1, Dan Lear1, Margarita Machairopoulou10, April McKinney14, Adam Mellor14, Alex Milligan7, Sophie Pitois7, Isabelle Rombouts5, Cordula Scherer15, Paul Tett16, Claire Widdicombe4, and Abigail McQuatters-Gollop8 1 10 The Marine Biological Association (MBA), The Laboratory, Citadel Hill, Plymouth, PL1 2PB, UK. 2 Centre for Environment Fisheries and Aquacu∑lture Science (Cefas), Weymouth, UK. 3 Université du Littoral Côte d’Opale, Université de Lille, CNRS UMR 8187 LOG, Laboratoire d’Océanologie et de Géosciences, Wimereux, France. 4 Plymouth Marine Laboratory, Prospect Place, Plymouth, PL1 3DH, UK. 5 15 Muséum National d’Histoire Naturelle (MNHN), CRESCO, 38 UMS Patrinat, Dinard, France. 6 Scottish Environment Protection Agency, Angus Smith Building, Maxim 6, Parklands Avenue, Eurocentral, Holytown, North Lanarkshire ML1 4WQ, UK. 7 Centre for Environment Fisheries and Aquaculture Science (Cefas), Lowestoft, UK. 8 Marine Conservation Research Group, University of Plymouth, Drake Circus, Plymouth, PL4 8AA, UK. 9 20 The Environment Agency, Kingfisher House, Goldhay Way, Peterborough, PE4 6HL, UK. 10 Marine Scotland Science, Marine Laboratory, 375 Victoria Road, Aberdeen, AB11 9DB, UK. -
New Perspectives on the Evolution of Protochordate Sensory and Locomotory Systems, and the Origin of Brains and Heads*
doi 10.1098/rstb.2001.0974 New perspectives on the evolution of protochordate sensory and locomotory systems, and the origin of brains and heads* Thurston C. Lacalli Biology Department, University of Saskatchewan, Saskatoon, Saskatchewan, Canada, S7N 5E2 ([email protected]) Cladistic analyses generally place tunicates close to the base of the chordate lineage, consistent with the assumption that the tunicate tail is primitively simple, not secondarily reduced from a segmented trunk. Cephalochordates (i.e. amphioxus) are segmented and resemble vertebrates in having two distinct loco- motory modes, slow for distance swimming and fast for escape, that depend on separate sets of motor neurons and muscle cells. The sense organs of both amphioxus and tunicate larvae serve essentially as navigational aids and, despite some uncertainty as to homologies, current molecular and ultrastructural data imply a close relationship between them. There are far fewer signs of modi¢cation and reduction in the amphioxus central nervous system (CNS), however, so it is arguably the closer to the ancestral condi- tion. Similarities between amphioxus and tunicate sense organs are then most easily explained if distance swimming evolved before and escape behaviour after the two lineages diverged, leaving tunicates to adopt more passive means of avoiding predation. Neither group has the kind of sense organs or sensory integration centres an organism would need to monitor predators, yet mobile predators with eyes were probably important in the early Palaeozoic. For a predator, improvements in vision and locomotion are mutually reinforcing. Both features probably evolved rapidly and together, in an `arms race'of eyes, brains and segments that left protochordates behind, and ultimately produced the vertebrate head. -
Ascidiacea (Chordata: Tunicata) of Greece: an Updated Checklist
Biodiversity Data Journal 4: e9273 doi: 10.3897/BDJ.4.e9273 Taxonomic Paper Ascidiacea (Chordata: Tunicata) of Greece: an updated checklist Chryssanthi Antoniadou‡, Vasilis Gerovasileiou§§, Nicolas Bailly ‡ Department of Zoology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece § Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Heraklion, Greece Corresponding author: Chryssanthi Antoniadou ([email protected]) Academic editor: Christos Arvanitidis Received: 18 May 2016 | Accepted: 17 Jul 2016 | Published: 01 Nov 2016 Citation: Antoniadou C, Gerovasileiou V, Bailly N (2016) Ascidiacea (Chordata: Tunicata) of Greece: an updated checklist. Biodiversity Data Journal 4: e9273. https://doi.org/10.3897/BDJ.4.e9273 Abstract Background The checklist of the ascidian fauna (Tunicata: Ascidiacea) of Greece was compiled within the framework of the Greek Taxon Information System (GTIS), an application of the LifeWatchGreece Research Infrastructure (ESFRI) aiming to produce a complete checklist of species recorded from Greece. This checklist was constructed by updating an existing one with the inclusion of recently published records. All the reported species from Greek waters were taxonomically revised and cross-checked with the Ascidiacea World Database. New information The updated checklist of the class Ascidiacea of Greece comprises 75 species, classified in 33 genera, 12 families, and 3 orders. In total, 8 species have been added to the previous species list (4 Aplousobranchia, 2 Phlebobranchia, and 2 Stolidobranchia). Aplousobranchia was the most speciose order, followed by Stolidobranchia. Most species belonged to the families Didemnidae, Polyclinidae, Pyuridae, Ascidiidae, and Styelidae; these 4 families comprise 76% of the Greek ascidian species richness. The present effort revealed the limited taxonomic research effort devoted to the ascidian fauna of Greece, © Antoniadou C et al. -
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 -
The Biology of Seashores - Image Bank Guide All Images and Text ©2006 Biomedia ASSOCIATES
The Biology of Seashores - Image Bank Guide All Images And Text ©2006 BioMEDIA ASSOCIATES Shore Types Low tide, sandy beach, clam diggers. Knowing the Low tide, rocky shore, sandstone shelves ,The time and extent of low tides is important for people amount of beach exposed at low tide depends both on who collect intertidal organisms for food. the level the tide will reach, and on the gradient of the beach. Low tide, Salt Point, CA, mixed sandstone and hard Low tide, granite boulders, The geology of intertidal rock boulders. A rocky beach at low tide. Rocks in the areas varies widely. Here, vertical faces of exposure background are about 15 ft. (4 meters) high. are mixed with gentle slopes, providing much variation in rocky intertidal habitat. Split frame, showing low tide and high tide from same view, Salt Point, California. Identical views Low tide, muddy bay, Bodega Bay, California. of a rocky intertidal area at a moderate low tide (left) Bays protected from winds, currents, and waves tend and moderate high tide (right). Tidal variation between to be shallow and muddy as sediments from rivers these two times was about 9 feet (2.7 m). accumulate in the basin. The receding tide leaves mudflats. High tide, Salt Point, mixed sandstone and hard rock boulders. Same beach as previous two slides, Low tide, muddy bay. In some bays, low tides expose note the absence of exposed algae on the rocks. vast areas of mudflats. The sea may recede several kilometers from the shoreline of high tide Tides Low tide, sandy beach. -
Blooms of the Pelagic Tunicate, <I>Dolioletta Gegenbauri:</I> Are
Journal of Marine Research, 43, 211-236,1985 Blooms of the pelagic tunicate, Dolioletta gegenbauri: Are they associated with Gulf Stream frontal eddies? I 2 by Don Deibel • ABSTRACT Satellite-directed sampling was used to determine whether blooms of Do/ioletta gegenbauri are associated with warm filaments of Gulf Stream frontal eddies. Radio-transmitting drogues were used to mark the center of the bloom so that physical and biological covariables could be measured inside and outside of bloom waters. The bloom was not in the warm filament of a frontal eddy, but was 60 - 70 km northwest of the temperature front between outer-shelf water and the Gulf Stream-in upwelled water probably originating from the eddy's cold core. This cold-core remnant (CCR) water was stranded between 2 middle-shelf fronts. The doliolid bloom resulted from the asexual production of gonozooids by the oozooid stage. This occurred primarily in the nearshore temperature and salinity front and in or beneath the pycnocline between CCR and overriding outer-shelf surface water. Several of the doliolid populations were estimated to be capable of clearing 40-120% of their resident water volume each day-removing particles of less than 50 J.Lm equivalent spherical diameter. Their removal of small particles is thought to be one of the primary reasons for poor copepod recruitment and low net zooplankton concentrations in the midst of doliolid blooms. The phytoplankton community was co-dominated by dinoflagellates and diatoms. indicating the strong influence of the Gulf Stream in these mid-shelf waters. Dominant diatoms were Thalassiosira subti/is and Rhizosolenia sp., both typical of Gulf Stream upwelling in the Georgia Bight. -
Tunicata, Ascidiacea) Do Estado De São Paulo, Brasil
Biota Neotrop., vol. 11(Supl.1) Checklist das ascídias (Tunicata, Ascidiacea) do Estado de São Paulo, Brasil Rosana Moreira da Rocha1,4, Gustavo Muniz Dias2 & Tito Monteiro da Cruz Lotufo3 1Departamento de Zoologia, Universidade Federal do Paraná – UFPR, CP 19020, CEP 81531-980, Curitiba, PR, Brasil 2Instituto Três Rios, Universidade Federal Rural do Rio de Janeiro – UFRRJ, Rua 14 de Dezembro, n. 271, Centro, CEP 25802-210, Três Rios, RJ, Brasil 3Instituto de Ciências do Mar, Universidade Federal do Ceará – UFC, Av. Abolição, n. 3207, CEP 60165-081, Fortaleza, CE, Brasil 4Autor para correspondência: Rosana Moreira da Rocha, e-mail: [email protected] ROCHA, R.M., DIAS, G.M. & LOTUFO, T.M.C. Checklist of ascidians (Tunicata, Ascidiacea) from São Paulo State, Brazil. Biota Neotrop. 11(1a): http://www.biotaneotropica.org.br/v11n1a/en/abstract?inventory+ bn0391101a2011. Abstract: Ascidians are marine organisms that, for the most part, are found adhered to hard substrates from coastal to abyssal regions. Despite being chordates, their body plan is very modified to suit their life-style. In Brazil, ascidians are best studied in the State of São Paulo, both in terms of biodiversity and ecology. In that state, coastal waters of the municipality of São Sebastião are particularly well studied because the Marine Biology Research station of the University of São Paulo established there has attracted researchers since the 1960s. Knowledge of ascidians has been increasing continuously during the last 50 years, and today, 66 species are recorded from the state of São Paulo. Nonetheless, there are still important areas that need study, such as the extreme north and south in that state, where the ascidians have almost never been sampled, especially on the many coastal islands.