Sirenews (ISSN 1017-3439) Is Published in April and October and Is Edited by Cynthia R
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
“Halitherium” Cristolii Fitzinger, 1842 (Mammalia, Sirenia) from the Late Oligocene of Austria, with the Description of a New Genus
European Journal of Taxonomy 256: 1–32 ISSN 2118-9773 http://dx.doi.org/10.5852/ejt.2016.256 www.europeanjournaloftaxonomy.eu 2016 · Voss M. et al. This work is licensed under a Creative Commons Attribution 3.0 License. Research article urn:lsid:zoobank.org:pub:43130F90-D802-4B65-BC6D-E3815A951C09 A taxonomic and morphological re-evaluation of “Halitherium” cristolii Fitzinger, 1842 (Mammalia, Sirenia) from the late Oligocene of Austria, with the description of a new genus Manja VOSS 1 ,*, Björn BERNING 2 & Erich REITER 3 1 Museum für Naturkunde – Leibniz Institute for Evolution and Biodiversity Science, Invalidenstraße 43, 10115 Berlin, Germany. 2 Upper Austrian State Museum, Geoscience Collections, Welser Straße 20, 4060 Leonding, Austria. 3 Institut für Chemische Technologie Anorganischer Stoffe, Johannes Kepler Universität Linz, Altenberger Straße 69, 4040 Linz, Austria. * Corresponding author: [email protected] 2 Email: [email protected] 3 Email: [email protected] 1 urn:lsid:zoobank.org:author:5B55FBFF-7871-431A-AE33-91A96FD4DD39 2 urn:lsid:zoobank.org:author:30D7D0DB-F379-4006-B727-E75A0720BD93 3 urn:lsid:zoobank.org:author:EA57128E-C88B-4A46-8134-0DF048567442 Abstract. The fossil sirenian material from the upper Oligocene Linz Sands of Upper Austria is reviewed and re-described in detail following a recent approach on the invalidity of the genus Halitherium Kaup, 1838. This morphological study provides the fi rst evidence for the synonymy of “Halitherium” cristolii Fitzinger 1842, “H.” abeli Spillmann, 1959 and “H.” pergense (Toula, 1899), supporting the hypothesis that only a single species inhabited the late Oligocene shores of present-day Upper Austria. -
Red Names=Invasive Species Green Names=Native Species
CURLY-LEAF PONDWEED EURASIAN WATERMIL- FANWORT CHARA (Potamogeton crispus) FOIL (Cabomba caroliniana) (Chara spp.) This undesirable exotic, also known (Myriophyllum spicatum) This submerged exotic Chara is typically found growing in species is not common as Crisp Pondweed, bears a waxy An aggressive plant, this exotic clear, hard water. Lacking true but management tools are cuticle on its upper leaves making milfoil can grow nearly 10 feet stems and leaves, Chara is actually a limited. Very similar to them stiff and somewhat brittle. in length forming dense mats form of algae. It’s stems are hollow aquarium species. Leaves The leaves have been described as at the waters surface. Grow- with leaf-like structures in a whorled are divided into fine resembling lasagna noodles, but ing in muck, sand, or rock, it pattern. It may be found growing branches in a fan-like ap- upon close inspection a row of has become a nuisance plant with tiny, orange fruiting bodies on pearance, opposite struc- “teeth” can be seen to line the mar- in many lakes and ponds by the branches called akinetes. Thick ture, spanning 2 inches. gins. Growing in dense mats near quickly outcompeting native masses of Chara can form in some Floating leaves are small, the water’s surface, it outcompetes species. Identifying features areas. Often confused with Starry diamond shape with a native plants for sun and space very include a pattern of 4 leaves stonewort, Coontail or Milfoils, it emergent white/pinkish early in spring. By midsummer, whorled around a hollow can be identified by a gritty texture flower. -
Bioone? RESEARCH
RESEARCH BioOne? EVOLVED Proximate Nutrient Analyses of Four Species of Submerged Aquatic Vegetation Consumed by Florida Manatee (Trichechus manatus latirostris) Compared to Romaine Lettuce (Lactuca sativa var. longifolia) Author(s): Jessica L. Siegal-Willott, D.V.M., Dipl. A.C.Z.M., Kendal Harr, D.V.M., M.S., Dipl. A.C.V.P., Lee-Ann C. Hayek, Ph.D., Karen C. Scott, Ph.D., Trevor Gerlach, B.S., Paul Sirois, M.S., Mike Renter, B.S., David W. Crewz, M.S., and Richard C. Hill, M.A., Vet.M.B., Ph.D., M.R.C.V.S. Source: Journal of Zoo and Wildlife Medicine, 41(4):594-602. 2010. Published By: American Association of Zoo Veterinarians DOI: 10.1638/2009-0118.1 URL: http://www.bioone.org/doi/full/10.1638/2009-0118.1 BioOne (www.bioone.org) is an electronic aggregator of bioscience research content, and the online home to over 160 journals and books published by not-for-profit societies, associations, museums, institutions, and presses. Your use of this PDF, the BioOne Web site, and all posted and associated content indicates your acceptance of BioOne's Terms of Use, available at www.bioone.org/page/terms of use. Usage of BioOne content is strictly limited to personal, educational, and non-commercial use. Commercial inquiries or rights and permissions requests should be directed to the individual publisher as copyright holder. BioOne sees sustainable scholarly publishing as an inherently collaborative enterprise connecting authors, nonprofit publishers, academic institutions, research libraries, and research funders in the common goal of maximizing access to critical research. -
Buccoo Reef/ Bon Accord Lagoon Complex
BUCCOO REEF/ BON ACCORD LAGOON COMPLEX Geographical Location: Tobago Name of the Ramsar site: Buccoo Reef/Bon Accord Lagoon Complex Ramsar Site No.: 1496 Geographical coordinates (latitude/longitude): 11° 10′ N, 60° 57′ W, Total site area: 1287 hectares 2 Area: 12.87 km (1287 ha). Mean sea level to 30 m below sea level Mangroves 2 2 2 account for 1.3 km (130 ha) of which 0.1 km (10 ha) are ponds and 0.5 km (50 ha) are seagrass beds General location: The wetland is located on the leeward coast of south-western Tobago and approximately 6 miles (in a straight line) from the administrative town of Scarborough, which is in the parish of St. Andrew. Adjacent to the wetland are the villages of Buccoo and Canaan/Bon Accord which are considered population growth poles in Tobago (IMA, 1996). Summary description: Buccoo Reef / Bon Accord Lagoon Complex. 1,287 ha; 11°10'N 060°57'W. Restricted Area (in the process of being designated as Environmentally Sensitive Area). Located on the south-western coast of Tobago near Scarborough, this site contains several under-represented wetland types such as coral reefs, seagrass beds and mangrove forests. Endangered and vulnerable species in the area include various types of coral (Acropora palmata, Diploria labyrinthiformis, D. strigosa and Siderastrea siderea) as well as the critically endangered Hawksbill turtle (Eretmochelys imbricata) and at least 119 fish species. As the major tourist attraction in Tobago, the reef continues to be adversely affected by intense tourist activity and pollutant discharges. So far the restricted area status and existing management plan have been unable to prevent these impacts. -
<I>Syringodium Filiforme</I>
BULLETIN OF MARINE SCIENCE, 83(3): 571–585, 2008 LEAF GROWTH OF THE SEAGRASS SYRINGODIUM FILIFORME IN OUTER FLORIDA BAY, FLORIDA Arthur C. Schwarzschild, W. Judson Kenworthy, and Joseph C. Zieman ABSTRACT Leaf growth of the seagrass Syringodium filiforme (Kütz., 1860) was determined using a new technique based on the growth of emergent leaves (EL method) and compared to the more labor intensive repeated measurements (RM) and demo- graphic allometric age reconstruction techniques (DA). All three techniques were used to compare leaf growth dynamics of plants with different morphologies at two sites, a shallow water (0.5 m) banktop and an adjacent deeper water (1.5 m) environ- ment in outer Florida Bay, Florida. Leaf formation rates (Leaf Plastochrone Interval or PI) determined using the EL and RM methods were nearly identical, with means of 20 and 21 d leaf–1 at both sites, significantly faster than the 30 d leaf–1 calculated using the DA method. The EL method produced the highest estimate of leaf growth, 1.8 and 1.9 cm d–1 at the 0.5 m and 1.5 m sites, respectively, followed by the RM method (1.3 and 1.3 cm d–1) and the DA method (1.0 and 1.1 cm d–1). None of the methods detected differences in leaf PI, leaf growth or leaf fragmentation rates be- tween sites. However, leaves at the 1.5 m site typically retained intact leaf tips longer than those at the 0.5 m site, and total leaf lifespan was longer at the 1.5 m site. -
West Indian Manatee (Trichechus Manatus) Habitat Characterization Using Side-Scan Sonar
Andrews University Digital Commons @ Andrews University Master's Theses Graduate Research 2017 West Indian Manatee (Trichechus Manatus) Habitat Characterization Using Side-Scan Sonar Mindy J. McLarty Andrews University, [email protected] Follow this and additional works at: https://digitalcommons.andrews.edu/theses Part of the Biology Commons Recommended Citation McLarty, Mindy J., "West Indian Manatee (Trichechus Manatus) Habitat Characterization Using Side-Scan Sonar" (2017). Master's Theses. 98. https://digitalcommons.andrews.edu/theses/98 This Thesis is brought to you for free and open access by the Graduate Research at Digital Commons @ Andrews University. It has been accepted for inclusion in Master's Theses by an authorized administrator of Digital Commons @ Andrews University. For more information, please contact [email protected]. ABSTRACT WEST INDIAN MANATEE (TRICHECHUS MANATUS) HABITAT CHARACTERIZATION USING SIDE-SCAN SONAR by Mindy J. McLarty Chair: Daniel Gonzalez-Socoloske ABSTRACT OF GRADUATE STUDENT RESEARCH Thesis Andrews University School of Arts and Sciences Title: WEST INDIAN MANATEE (TRICHECHUS MANATUS) HABITAT CHARACTERIZATION USING SIDE-SCAN SONAR Name of researcher: Mindy J. McLarty Name and degree of faculty chair: Daniel Gonzalez-Socoloske, Ph.D. Date completed: April 2017 In this study, the reliability of low cost side-scan sonar to accurately identify soft substrates such as grass and mud was tested. Benthic substrates can be hard to classify from the surface, necessitating an alternative survey approach. A total area of 11.5 km2 was surveyed with the sonar in a large, brackish mangrove lagoon system. Individual points were ground-truthed for comparison with the sonar recordings to provide a measure of accuracy. -
Download Full Article in PDF Format
A new marine vertebrate assemblage from the Late Neogene Purisima Formation in Central California, part II: Pinnipeds and Cetaceans Robert W. BOESSENECKER Department of Geology, University of Otago, 360 Leith Walk, P.O. Box 56, Dunedin, 9054 (New Zealand) and Department of Earth Sciences, Montana State University 200 Traphagen Hall, Bozeman, MT, 59715 (USA) and University of California Museum of Paleontology 1101 Valley Life Sciences Building, Berkeley, CA, 94720 (USA) [email protected] Boessenecker R. W. 2013. — A new marine vertebrate assemblage from the Late Neogene Purisima Formation in Central California, part II: Pinnipeds and Cetaceans. Geodiversitas 35 (4): 815-940. http://dx.doi.org/g2013n4a5 ABSTRACT e newly discovered Upper Miocene to Upper Pliocene San Gregorio assem- blage of the Purisima Formation in Central California has yielded a diverse collection of 34 marine vertebrate taxa, including eight sharks, two bony fish, three marine birds (described in a previous study), and 21 marine mammals. Pinnipeds include the walrus Dusignathus sp., cf. D. seftoni, the fur seal Cal- lorhinus sp., cf. C. gilmorei, and indeterminate otariid bones. Baleen whales include dwarf mysticetes (Herpetocetus bramblei Whitmore & Barnes, 2008, Herpetocetus sp.), two right whales (cf. Eubalaena sp. 1, cf. Eubalaena sp. 2), at least three balaenopterids (“Balaenoptera” cortesi “var.” portisi Sacco, 1890, cf. Balaenoptera, Balaenopteridae gen. et sp. indet.) and a new species of rorqual (Balaenoptera bertae n. sp.) that exhibits a number of derived features that place it within the genus Balaenoptera. is new species of Balaenoptera is relatively small (estimated 61 cm bizygomatic width) and exhibits a comparatively nar- row vertex, an obliquely (but precipitously) sloping frontal adjacent to vertex, anteriorly directed and short zygomatic processes, and squamosal creases. -
Global Seagrass Distribution and Diversity: a Bioregional Model ⁎ F
Journal of Experimental Marine Biology and Ecology 350 (2007) 3–20 www.elsevier.com/locate/jembe Global seagrass distribution and diversity: A bioregional model ⁎ F. Short a, , T. Carruthers b, W. Dennison b, M. Waycott c a Department of Natural Resources, University of New Hampshire, Jackson Estuarine Laboratory, Durham, NH 03824, USA b Integration and Application Network, University of Maryland Center for Environmental Science, Cambridge, MD 21613, USA c School of Marine and Tropical Biology, James Cook University, Townsville, 4811 Queensland, Australia Received 1 February 2007; received in revised form 31 May 2007; accepted 4 June 2007 Abstract Seagrasses, marine flowering plants, are widely distributed along temperate and tropical coastlines of the world. Seagrasses have key ecological roles in coastal ecosystems and can form extensive meadows supporting high biodiversity. The global species diversity of seagrasses is low (b60 species), but species can have ranges that extend for thousands of kilometers of coastline. Seagrass bioregions are defined here, based on species assemblages, species distributional ranges, and tropical and temperate influences. Six global bioregions are presented: four temperate and two tropical. The temperate bioregions include the Temperate North Atlantic, the Temperate North Pacific, the Mediterranean, and the Temperate Southern Oceans. The Temperate North Atlantic has low seagrass diversity, the major species being Zostera marina, typically occurring in estuaries and lagoons. The Temperate North Pacific has high seagrass diversity with Zostera spp. in estuaries and lagoons as well as Phyllospadix spp. in the surf zone. The Mediterranean region has clear water with vast meadows of moderate diversity of both temperate and tropical seagrasses, dominated by deep-growing Posidonia oceanica. -
Evolução, Hegemonia E Desaparecimento Dos Sirénios Dos Mares Europeus Ao Longo Do Cenozoico
Universidade de Lisboa Faculdade de Ciências Departamento de Geologia Evolução, hegemonia e desaparecimento dos sirénios dos mares europeus ao longo do Cenozoico causas endógenas (alterações climáticas globais) ou exógenas (ambiente galáctico)? Gonçalo Abreu Prista Dissertação Mestrado em Ciências do Mar 2012 Universidade de Lisboa Faculdade de Ciências Departamento de Geologia Evolução, hegemonia e desaparecimento dos sirénios dos mares europeus ao longo do Cenozoico causas endógenas (alterações climáticas globais) ou exógenas (ambiente galáctico)? Gonçalo Abreu Prista Dissertação Mestrado em Ciências do Mar Orientadores: Professor Doutor Mário Albino Cachão Professor Doutor Rui Jorge Agostinho 2012 EVOLUÇÃO, HEGEMONIA E DESAPARECIMENTO DOS SIRÉNIOS DOS MARES EUROPEUS AO LONGO DO CENOZOICO causas endógenas (alterações climáticas globais) ou exógenas (ambiente galáctico)? GONÇALO ABREU PRISTA ORIENTAÇÃO CIENTÍFICA: PROF. DOUTOR MÁRIO ALBINO PIO CACHÃO Professor Auxiliar Agregado do Departamento de Geologia da Faculdade de Ciências da Universidade de Lisboa Membro do Centro de Geologia da Universidade de Lisboa PROF. DOUTOR RUI JORGE AGOSTINHO Professor Auxiliar Agregado do Departamento de Física da Faculdade de Ciências da Universidade de Lisboa Membro do Centro de Astronomia e Astrofísica da Universidade de Lisboa Director do Observatório Astronómico de Lisboa iii "Graças aos descobrimentos da Paleontologia, a História Natural é História, no sentido literal da palavra" Albert Gaudry (1827 - 1908). "O azoto no nosso DNA, o cálcio nos nossos dentes, o ferro no nosso sangue, o carbono nas nossas tartes de maçã foram feitos no interior de estrelas em colapso. Nós somos feitos de material estelar" Carl Sagan (1934 - 1996) iv AGRADECIMENTOS Primeiro aos meus pais, pois sem o seu apoio, a todos os níveis, este mestrado e esta dissertação não seriam possíveis. -
Effects of Two Hurricanes on Syringodium Filiforme, Manatee Grass, Within the Loxahatchee River Estuary, Southeast Florida
Estuaries and Coasts Vol. 29, No. 6A, p. 1019–1025 December 2006 Effects of Two Hurricanes on Syringodium filiforme, Manatee Grass, Within the Loxahatchee River Estuary, Southeast Florida MARY S. RIDLER,RICHARD C. DENT, and D. ALBREY ARRINGTON* Loxahatchee River District, 2500 Jupiter Park Drive, Jupiter, Florida 33458 ABSTRACT: In September 2004, the Loxahatchee River Estuary was affected by Hurricanes Frances and Jeanne, which resulted in a monthly rainfall record of 610 mm and abnormally high freshwater discharges to the system. The occurrence, density, and biomass of Syringodium filiforme in the Loxahatchee River Estuary declined significantly following the September 2004 storms based on 15 mo of pre-hurricane monitoring and 12 mo of post-hurricane monitoring. Throughout post- hurricane monitoring, S. filiforme showed no sign of recovery, though Halophila johnsonii increased considerably during the post-hurricane period. Freshwater discharges resulting from the September 2004 hurricanes lowered minimum daily salinity values to near zero and increased standard deviation of daily salinity values to 11%. Extremely low minimum daily salinity values and high daily salinity fluctuations likely resulted in the observed decline of S. filiforme. We advise the use of minimum daily salinity values when assessing seagrass habitat suitability or when modeling the effects of alternative water management scenarios. Introduction of seagrasses in the Loxahatchee River Estuary. Estuaries receive considerable attention from Because seagrasses have been deemed a valued local stakeholders and natural resource managers ecosystem component, they will be used to assess because they provide essential nursery habitats that restoration success following modified freshwater support the development of larval and juvenile fish inflows resulting from the Comprehensive Ever- and invertebrates (Montague and Ley 1993; Four- glades Restoration Project and the Northwest Fork qurean et al. -
Karyotype Variations in Seagrass (Halodule Wrightii Ascherson¬タヤ
Aquatic Botany 136 (2017) 52–55 Contents lists available at ScienceDirect Aquatic Botany journal homepage: www.elsevier.com/locate/aquabot Short communication Karyotype variations in seagrass (Halodule wrightii Ascherson—Cymodoceaceae) a b,∗ a Silmar Luiz da Silva , Karine Matos Magalhães , Reginaldo de Carvalho a Graduate Program in Botany—PPGB and Cytogenetic Plant Laboratory of the Federal Rural University of Pernambuco, Rua Dom Manoel de Medeiros, s/n, Dois Irmãos, CEP: 52171-900, Recife, Pernambuco, Brazil b Aquatic Ecosystems Laboratory of the Federal Rural University of Pernambuco, Rua Dom Manoel de Medeiros, s/n, Dois Irmãos, CEP: 52171-900, Recife, Pernambuco, Brazil a r t i c l e i n f o a b s t r a c t Article history: Karyotype variations in plants are common, but the results of cytological studies of some seagrasses Received 26 June 2015 remain unclear. The nature of the variation is not clearly understood, and the basic chromosomal num- Received in revised form 5 August 2016 ber has still not been established for the majority of the species. Here, we describe karyotype variations in Accepted 15 September 2016 the seagrass Halodule wrightii, and we suggest potentially causative mechanisms involving cytomixis and Available online 16 September 2016 B chromosomes. We prepared slides using the squashing technique followed by conventional Giemsa and C-banding, and silver nitrate and a CMA/DAPI staining. Based on intraspecific analysis, the diploid chromo- Keywords: some number of H. wrightii exhibited a variation from 2n = 24 to 2n = 39; 2n = 38 was the most frequent. In Cytomixis Seagrass general, we characterized the karyotype as an asymmetrical, semi-reticulated interphase nucleus with a chromosomally uniform condensation pattern. -
Introduction to Common Native & Invasive Freshwater Plants in Alaska
Introduction to Common Native & Potential Invasive Freshwater Plants in Alaska Cover photographs by (top to bottom, left to right): Tara Chestnut/Hannah E. Anderson, Jamie Fenneman, Vanessa Morgan, Dana Visalli, Jamie Fenneman, Lynda K. Moore and Denny Lassuy. Introduction to Common Native & Potential Invasive Freshwater Plants in Alaska This document is based on An Aquatic Plant Identification Manual for Washington’s Freshwater Plants, which was modified with permission from the Washington State Department of Ecology, by the Center for Lakes and Reservoirs at Portland State University for Alaska Department of Fish and Game US Fish & Wildlife Service - Coastal Program US Fish & Wildlife Service - Aquatic Invasive Species Program December 2009 TABLE OF CONTENTS TABLE OF CONTENTS Acknowledgments ............................................................................ x Introduction Overview ............................................................................. xvi How to Use This Manual .................................................... xvi Categories of Special Interest Imperiled, Rare and Uncommon Aquatic Species ..................... xx Indigenous Peoples Use of Aquatic Plants .............................. xxi Invasive Aquatic Plants Impacts ................................................................................. xxi Vectors ................................................................................. xxii Prevention Tips .................................................... xxii Early Detection and Reporting