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Atlas of the Neuromuscular System in the Trachymedusa Aglantha Digitale: Insights from the Advanced Hydrozoan
Received: 11 September 2019 Revised: 17 November 2019 Accepted: 18 November 2019 DOI: 10.1002/cne.24821 RESEARCH ARTICLE Atlas of the neuromuscular system in the Trachymedusa Aglantha digitale: Insights from the advanced hydrozoan Tigran P. Norekian1,2,3 | Leonid L. Moroz1,4 1Whitney Laboratory for Marine Biosciences, University of Florida, St. Augustine, Florida Abstract 2Friday Harbor Laboratories, University of Cnidaria is the sister taxon to bilaterian animals, and therefore, represents a key refer- Washington, Friday Harbor, Washington ence lineage to understand early origins and evolution of the neural systems. The 3Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of hydromedusa Aglantha digitale is arguably the best electrophysiologically studied jelly- Sciences, Moscow, Russia fish because of its system of giant axons and unique fast swimming/escape behaviors. 4 Department of Neuroscience and McKnight Here, using a combination of scanning electron microscopy and immunohistochemistry Brain Institute, University of Florida, Gainesville, Florida together with phalloidin labeling, we systematically characterize both neural and mus- cular systems in Aglantha, summarizing and expanding further the previous knowledge Correspondence Leonid L. Moroz, The Whitney Laboratory, on the microscopic neuroanatomy of this crucial reference species. We found that the University of Florida, 9505 Ocean Shore Blvd., majority, if not all (~2,500) neurons, that are labeled by FMRFamide antibody are dif- St. Augustine, FL. Email: [email protected] ferent from those revealed by anti-α-tubulin immunostaining, making these two neuro- nal markers complementary to each other and, therefore, expanding the diversity of Funding information National Science Foundation, Grant/Award neural elements in Aglantha with two distinct neural subsystems. -
Diversity and Community Structure of Pelagic Cnidarians in the Celebes and Sulu Seas, Southeast Asian Tropical Marginal Seas
Deep-Sea Research I 100 (2015) 54–63 Contents lists available at ScienceDirect Deep-Sea Research I journal homepage: www.elsevier.com/locate/dsri Diversity and community structure of pelagic cnidarians in the Celebes and Sulu Seas, southeast Asian tropical marginal seas Mary M. Grossmann a,n, Jun Nishikawa b, Dhugal J. Lindsay c a Okinawa Institute of Science and Technology Graduate University (OIST), Tancha 1919-1, Onna-son, Okinawa 904-0495, Japan b Tokai University, 3-20-1, Orido, Shimizu, Shizuoka 424-8610, Japan c Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka 237-0061, Japan article info abstract Article history: The Sulu Sea is a semi-isolated, marginal basin surrounded by high sills that greatly reduce water inflow Received 13 September 2014 at mesopelagic depths. For this reason, the entire water column below 400 m is stable and homogeneous Received in revised form with respect to salinity (ca. 34.00) and temperature (ca. 10 1C). The neighbouring Celebes Sea is more 19 January 2015 open, and highly influenced by Pacific waters at comparable depths. The abundance, diversity, and Accepted 1 February 2015 community structure of pelagic cnidarians was investigated in both seas in February 2000. Cnidarian Available online 19 February 2015 abundance was similar in both sampling locations, but species diversity was lower in the Sulu Sea, Keywords: especially at mesopelagic depths. At the surface, the cnidarian community was similar in both Tropical marginal seas, but, at depth, community structure was dependent first on sampling location Marginal sea and then on depth within each Sea. Cnidarians showed different patterns of dominance at the two Sill sampling locations, with Sulu Sea communities often dominated by species that are rare elsewhere in Pelagic cnidarians fi Community structure the Indo-Paci c. -
Anthopleura and the Phylogeny of Actinioidea (Cnidaria: Anthozoa: Actiniaria)
Org Divers Evol (2017) 17:545–564 DOI 10.1007/s13127-017-0326-6 ORIGINAL ARTICLE Anthopleura and the phylogeny of Actinioidea (Cnidaria: Anthozoa: Actiniaria) M. Daly1 & L. M. Crowley2 & P. Larson1 & E. Rodríguez2 & E. Heestand Saucier1,3 & D. G. Fautin4 Received: 29 November 2016 /Accepted: 2 March 2017 /Published online: 27 April 2017 # Gesellschaft für Biologische Systematik 2017 Abstract Members of the sea anemone genus Anthopleura by the discovery that acrorhagi and verrucae are are familiar constituents of rocky intertidal communities. pleisiomorphic for the subset of Actinioidea studied. Despite its familiarity and the number of studies that use its members to understand ecological or biological phe- Keywords Anthopleura . Actinioidea . Cnidaria . Verrucae . nomena, the diversity and phylogeny of this group are poor- Acrorhagi . Pseudoacrorhagi . Atomized coding ly understood. Many of the taxonomic and phylogenetic problems stem from problems with the documentation and interpretation of acrorhagi and verrucae, the two features Anthopleura Duchassaing de Fonbressin and Michelotti, 1860 that are used to recognize members of Anthopleura.These (Cnidaria: Anthozoa: Actiniaria: Actiniidae) is one of the most anatomical features have a broad distribution within the familiar and well-known genera of sea anemones. Its members superfamily Actinioidea, and their occurrence and exclu- are found in both temperate and tropical rocky intertidal hab- sivity are not clear. We use DNA sequences from the nu- itats and are abundant and species-rich when present (e.g., cleus and mitochondrion and cladistic analysis of verrucae Stephenson 1935; Stephenson and Stephenson 1972; and acrorhagi to test the monophyly of Anthopleura and to England 1992; Pearse and Francis 2000). -
EST 1. Species of Aglaophenia Reported from Patagonia, South
EST 1. Species of Aglaophenia reported from Patagonia, South Atlantic, South Africa, Tasmania and New Zealand [Locations marked with * slighly northern to Patagonian region (i.e. 40° S in the western sector)]. Only the last and/or major contributions per locality are given. Patagonia South Atlantic South Africa Tasmania New Zealand Source (respectively) Aglaophenia acacia Allman, 1883 x El Beshbeeshy & Jarms 2011 Aglaophenia acanthocarpa Allman, 1876 x Vervoort & Watson 2003, Alfaro et al. 2004 Aglaophenia antarctica Jäderholm, 1903 x Jäderholm 1903 Aglaophenia ctenata (Totton, 1930) x Vervoort & Watson 2003 Aglaophenia cupressina Lamouroux, 1816 x Millard 1975 Aglaophenia decumbens Bale, 1914 x Hodgson 1950 Aglaophenia difficilis Vervoort & Watson, 2003 x Vervoort & Watson 2003 Aglaophenia digitulus Vervoort & Watson, 2003 x Vervoort & Watson 2003 Aglaophenia divaricata (Busk, 1852) x* x Galea et al. 2014; Watson 1975 Aglaophenia hystrix Vervoort & Watson, 2003 x Vervoort & Watson 2003 Aglaophenia latecarinata Allman, 1877 x Millard 1975 Aglaophenia laxa Allman, 1876 x Vervoort & Watson 2003 Aglaophenia parvula Bale, 1882 x x x Galea 2015; Millard 1975 (as Aglaophenia pluma parvula), Gili et al. 1989; Hodgson 1950 Aglaophenia patagonica d'Orbigny, 1839 x Leloup 1974 Aglaophenia picardi Svoboda, 1979 x Galea 2015 Aglaophenia pluma (Linnaeus, 1758) x Millard 1975 (as Aglaophenia pluma pluma and Aglaophenia pluma dichotoma) Aglaophenia plumosa Bale, 1882 x x Watson 1975; Vervoort & Watson 2003 Aglaophenia sinuosa Bale, 1888 x Vervoort & Watson 2003 Aglaophenia subspiralis Vervoort & Watson, 2003 x Vervoort & Watson 2003 Aglaophenia tasmanica Bale, 1914 x Hodgson 1950 ALFARO, C.A., JEFFS, A.G. & CREESE, R.G. 2004. Bottom-drifting algal/mussel spat associations along a sandy coastal region in northern New Zealand. -
Sources of Maratha History: Indian Sources
1 SOURCES OF MARATHA HISTORY: INDIAN SOURCES Unit Structure : 1.0 Objectives 1.1 Introduction 1.2 Maratha Sources 1.3 Sanskrit Sources 1.4 Hindi Sources 1.5 Persian Sources 1.6 Summary 1.7 Additional Readings 1.8 Questions 1.0 OBJECTIVES After the completion of study of this unit the student will be able to:- 1. Understand the Marathi sources of the history of Marathas. 2. Explain the matter written in all Bakhars ranging from Sabhasad Bakhar to Tanjore Bakhar. 3. Know Shakavalies as a source of Maratha history. 4. Comprehend official files and diaries as source of Maratha history. 5. Understand the Sanskrit sources of the Maratha history. 6. Explain the Hindi sources of Maratha history. 7. Know the Persian sources of Maratha history. 1.1 INTRODUCTION The history of Marathas can be best studied with the help of first hand source material like Bakhars, State papers, court Histories, Chronicles and accounts of contemporary travelers, who came to India and made observations of Maharashtra during the period of Marathas. The Maratha scholars and historians had worked hard to construct the history of the land and people of Maharashtra. Among such scholars people like Kashinath Sane, Rajwade, Khare and Parasnis were well known luminaries in this field of history writing of Maratha. Kashinath Sane published a mass of original material like Bakhars, Sanads, letters and other state papers in his journal Kavyetihas Samgraha for more eleven years during the nineteenth century. There is much more them contribution of the Bharat Itihas Sanshodhan Mandal, Pune to this regard. -
Aglaopheniid Hydroids (Cnidaria: Hydrozoa: Aglaopheniidae) from Bathyal Waters of the Flemish Cap, Flemish Pass, and Grand Banks of Newfoundland (NW Atlantic)
Zootaxa 3737 (5): 501–537 ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Article ZOOTAXA Copyright © 2013 Magnolia Press ISSN 1175-5334 (online edition) http://dx.doi.org/10.11646/zootaxa.3737.5.1 http://zoobank.org/urn:lsid:zoobank.org:pub:B5FE322D-4D0A-45E6-84BF-F00FA6308DE1 Aglaopheniid hydroids (Cnidaria: Hydrozoa: Aglaopheniidae) from bathyal waters of the Flemish Cap, Flemish Pass, and Grand Banks of Newfoundland (NW Atlantic) ÁLVARO ALTUNA1, FRANCISCO J. MURILLO2 & DALE R. CALDER3 1INSUB, Museo de Okendo, Zemoria, 12, Apartado 3223, 20013 Donostia-San Sebastián, Spain. E-mail: [email protected] 2Instituto Español de Oceanografía, Centro Oceanográfico de Vigo, Programa de Pesquerías Lejanas, Apartado 1552, 36280 Vigo, Spain. E-mail: [email protected] 3Department of Natural History, Royal Ontario Museum, 100 Queen’s Park, Toronto, Ontario, Canada M5S 2C6. E-mail: [email protected] 1Corresponding author Abstract Five species of aglaopheniid hydroids (Aglaophenopsis cornuta, Cladocarpus diana, C. formosus, C. integer, and Nema- tocarpus ramuliferus) were collected from the Flemish Cap, Flemish Pass, and Grand Banks of Newfoundland during sur- veys with bottom trawls, rock dredges, and scallop gear. All are infrequently reported species, with C. diana being discovered for the first time since its original description from Iceland. We document here the southernmost collections of C. diana and N. ramuliferus, both previously unknown in the western Atlantic. Each of the five species is described and illustrated based on fertile material, a key is provided for their identification, and bathymetric distributions are noted. Known depth ranges are extended for A. cornuta, C. diana, and C. -
The Evolution of Siphonophore Tentilla for Specialized Prey Capture in the Open Ocean
The evolution of siphonophore tentilla for specialized prey capture in the open ocean Alejandro Damian-Serranoa,1, Steven H. D. Haddockb,c, and Casey W. Dunna aDepartment of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520; bResearch Division, Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039; and cEcology and Evolutionary Biology, University of California, Santa Cruz, CA 95064 Edited by Jeremy B. C. Jackson, American Museum of Natural History, New York, NY, and approved December 11, 2020 (received for review April 7, 2020) Predator specialization has often been considered an evolutionary makes them an ideal system to study the relationships between “dead end” due to the constraints associated with the evolution of functional traits and prey specialization. Like a head of coral, a si- morphological and functional optimizations throughout the organ- phonophore is a colony bearing many feeding polyps (Fig. 1). Each ism. However, in some predators, these changes are localized in sep- feeding polyp has a single tentacle, which branches into a series of arate structures dedicated to prey capture. One of the most extreme tentilla. Like other cnidarians, siphonophores capture prey with cases of this modularity can be observed in siphonophores, a clade of nematocysts, harpoon-like stinging capsules borne within special- pelagic colonial cnidarians that use tentilla (tentacle side branches ized cells known as cnidocytes. Unlike the prey-capture apparatus of armed with nematocysts) exclusively for prey capture. Here we study most other cnidarians, siphonophore tentacles carry their cnidocytes how siphonophore specialists and generalists evolve, and what mor- in extremely complex and organized batteries (3), which are located phological changes are associated with these transitions. -
5Thmarch 2019
Registration details: Patrons Delegates are requested to send their Hon. Sanjay Datta Patil Registration fees through Demand Draft. The draft President, Janata Shikshan Mandal, Alibag should be drawn in favour of Principal, Adv. Gautam Patil J.S.M.College, Alibag- Raigad, payable at Alibag. Vice-President, Janata Shikshan Mandal, Alibag Participants can also deposit their registration fees Hon. Ajit P. Shah Janata Shikshan Mandal’s online with following account details: Secretary, Janata Shikshan Mandal, Alibag Late. Nanasaheb Kunte Education Complex Account name: Principal, J. S. M. College, Alibag Smt. Indirabai G. Kulkarni Arts College, Account No: 915010024197287 Convener J.B. Sawant Science College and Bank name: Axis Bank; Branch name: Alibag Dr. Anil K. Patil Sau. Janakibai Dhondo Kunte Commerce College. IFSC Code: UTIB0001700 Principal, J. S. M. College, Alibag Alibag, Dist.-Raigad-Maharashtra, India 402201. International Code (Swift Code): AXISINBBA32. Permanently affiliated to University of Mumbai, Registration Fee: Co-Convener Recognised under section 2(f), 12 (B) of the UGC Dr. N. N. Shere Reaccredited with B Grade (3rd Cycle) Category Fees Vice – Principal and Head, Dept. of Marathi e-mail: [email protected] Teachers/Researchers Rs.700/- Registration Website: www.jsmalibag.edu.in/home/Senior Organizing Secretary Dr. Mohsin Khan Prof. M. S. Suryawanshi P.G. / U.G. Students Rs.300/- Registration Head, Dept. of Hindi Head, Dept. of English One Day National Conference Research Scholars on Advisory Committee INDIAN LANGUAGES, LITERATURE AND Conference Registration fees includes access to all Prof. A. M. Oak CULTURE IN THE GLOBAL CONTEXT sessions, Conference kit, Tea, Breakfast, Lunch, and Vice Principal, J.S.M. -
Redescription and Notes on the Reproductive Biology of the Sea Anemone Urticina Fecunda (Verrill, 1899), Comb
Zootaxa 3523: 69–79 (2012) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA Copyright © 2012 · Magnolia Press Article ISSN 1175-5334 (online edition) urn:lsid:zoobank.org:pub:142C1CEE-A28D-4C03-A74C-434E0CE9541A Redescription and notes on the reproductive biology of the sea anemone Urticina fecunda (Verrill, 1899), comb. nov. (Cnidaria: Actiniaria: Actiniidae) PAUL G. LARSON1, JEAN-FRANÇOIS HAMEL2 & ANNIE MERCIER3 1Department of Evolution, Ecology and Organismal Biology, The Ohio State University (Ohio) 43210 USA [email protected] 2Society for the Exploration and Valuing of the Environment (SEVE), Portugal Cove-St. Philips (Newfoundland and Labrador) A1M 2B7 Canada [email protected] 3Department of Ocean Sciences (OSC), Memorial University, St. John’s (Newfoundland and Labrador) A1C 5S7 Canada [email protected] Abstract The externally brooding sea anemone Epiactis fecunda (Verrill, 1899) is redescribed as Urticina fecunda, comb. nov., on the basis of preserved type material and anatomical and behavioural observations of recently collected animals. The sea- sonal timing of reproduction and aspects of the settlement and development of brooded offspring are reported. Precise locality data extend the bathymetric range to waters as shallow as 10 m, and the geographical range east to the Avalon Peninsula (Newfoundland, Canada). We differentiate it from other known northern, externally brooding species of sea anemone. Morphological characters, including verrucae, decamerous mesenterial arrangement, and non-overlapping sizes of basitrichs in tentacles and actinopharynx, agree with a generic diagnosis of Urticina Ehrenberg, 1834 rather than Epi- actis Verrill, 1869. Key words: Brooding, Epiactis, Epigonactis Introduction Since its original description in 1899 based on two preserved specimens, no subsequent collection of the species currently known as Epiactis fecunda (Verrill, 1899) has been reported in the literature, nor have details of its life history nor descriptions of the live animal. -
DEEP SEA LEBANON RESULTS of the 2016 EXPEDITION EXPLORING SUBMARINE CANYONS Towards Deep-Sea Conservation in Lebanon Project
DEEP SEA LEBANON RESULTS OF THE 2016 EXPEDITION EXPLORING SUBMARINE CANYONS Towards Deep-Sea Conservation in Lebanon Project March 2018 DEEP SEA LEBANON RESULTS OF THE 2016 EXPEDITION EXPLORING SUBMARINE CANYONS Towards Deep-Sea Conservation in Lebanon Project Citation: Aguilar, R., García, S., Perry, A.L., Alvarez, H., Blanco, J., Bitar, G. 2018. 2016 Deep-sea Lebanon Expedition: Exploring Submarine Canyons. Oceana, Madrid. 94 p. DOI: 10.31230/osf.io/34cb9 Based on an official request from Lebanon’s Ministry of Environment back in 2013, Oceana has planned and carried out an expedition to survey Lebanese deep-sea canyons and escarpments. Cover: Cerianthus membranaceus © OCEANA All photos are © OCEANA Index 06 Introduction 11 Methods 16 Results 44 Areas 12 Rov surveys 16 Habitat types 44 Tarablus/Batroun 14 Infaunal surveys 16 Coralligenous habitat 44 Jounieh 14 Oceanographic and rhodolith/maërl 45 St. George beds measurements 46 Beirut 19 Sandy bottoms 15 Data analyses 46 Sayniq 15 Collaborations 20 Sandy-muddy bottoms 20 Rocky bottoms 22 Canyon heads 22 Bathyal muds 24 Species 27 Fishes 29 Crustaceans 30 Echinoderms 31 Cnidarians 36 Sponges 38 Molluscs 40 Bryozoans 40 Brachiopods 42 Tunicates 42 Annelids 42 Foraminifera 42 Algae | Deep sea Lebanon OCEANA 47 Human 50 Discussion and 68 Annex 1 85 Annex 2 impacts conclusions 68 Table A1. List of 85 Methodology for 47 Marine litter 51 Main expedition species identified assesing relative 49 Fisheries findings 84 Table A2. List conservation interest of 49 Other observations 52 Key community of threatened types and their species identified survey areas ecological importanc 84 Figure A1. -
Comprehensive Phylogenomic Analyses Resolve Cnidarian Relationships and the Origins of Key Organismal Traits
Comprehensive phylogenomic analyses resolve cnidarian relationships and the origins of key organismal traits Ehsan Kayal1,2, Bastian Bentlage1,3, M. Sabrina Pankey5, Aki H. Ohdera4, Monica Medina4, David C. Plachetzki5*, Allen G. Collins1,6, Joseph F. Ryan7,8* Authors Institutions: 1. Department of Invertebrate Zoology, National Museum of Natural History, Smithsonian Institution 2. UPMC, CNRS, FR2424, ABiMS, Station Biologique, 29680 Roscoff, France 3. Marine Laboratory, university of Guam, UOG Station, Mangilao, GU 96923, USA 4. Department of Biology, Pennsylvania State University, University Park, PA, USA 5. Department of Molecular, Cellular and Biomedical Sciences, University of New Hampshire, Durham, NH, USA 6. National Systematics Laboratory, NOAA Fisheries, National Museum of Natural History, Smithsonian Institution 7. Whitney Laboratory for Marine Bioscience, University of Florida, St Augustine, FL, USA 8. Department of Biology, University of Florida, Gainesville, FL, USA PeerJ Preprints | https://doi.org/10.7287/peerj.preprints.3172v1 | CC BY 4.0 Open Access | rec: 21 Aug 2017, publ: 21 Aug 20171 Abstract Background: The phylogeny of Cnidaria has been a source of debate for decades, during which nearly all-possible relationships among the major lineages have been proposed. The ecological success of Cnidaria is predicated on several fascinating organismal innovations including symbiosis, colonial body plans and elaborate life histories, however, understanding the origins and subsequent diversification of these traits remains difficult due to persistent uncertainty surrounding the evolutionary relationships within Cnidaria. While recent phylogenomic studies have advanced our knowledge of the cnidarian tree of life, no analysis to date has included genome scale data for each major cnidarian lineage. Results: Here we describe a well-supported hypothesis for cnidarian phylogeny based on phylogenomic analyses of new and existing genome scale data that includes representatives of all cnidarian classes. -
Changing Jellyfish Populations: Trends in Large Marine Ecosystems
CHANGING JELLYFISH POPULATIONS: TRENDS IN LARGE MARINE ECOSYSTEMS by Lucas Brotz B.Sc., The University of British Columbia, 2000 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE in The Faculty of Graduate Studies (Oceanography) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) October 2011 © Lucas Brotz, 2011 Abstract Although there are various indications and claims that jellyfish have been increasing at a global scale in recent decades, a rigorous demonstration to this effect has never been presented. As this is mainly due to scarcity of quantitative time series of jellyfish abundance from scientific surveys, an attempt is presented here to complement such data with non- conventional information from other sources. This was accomplished using the analytical framework of fuzzy logic, which allows the combination of information with variable degrees of cardinality, reliability, and temporal and spatial coverage. Data were aggregated and analysed at the scale of Large Marine Ecosystem (LME). Of the 66 LMEs defined thus far, which cover the world’s coastal waters and seas, trends of jellyfish abundance (increasing, decreasing, or stable/variable) were identified (occurring after 1950) for 45, with variable degrees of confidence. Of these 45 LMEs, the overwhelming majority (31 or 69%) showed increasing trends. Recent evidence also suggests that the observed increases in jellyfish populations may be due to the effects of human activities, such as overfishing, global warming, pollution, and coastal development. Changing jellyfish populations were tested for links with anthropogenic impacts at the LME scale, using a variety of indicators and a generalized additive model. Significant correlations were found with several indicators of ecosystem health, as well as marine aquaculture production, suggesting that the observed increases in jellyfish populations are indeed due to human activities and the continued degradation of the marine environment.