DOCSLIB.ORG

Downloaded from Brill.Com10/03/2021 01:33:45PM Via Free Access 46 M

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Downloaded from Brill.Com10/03/2021 01:33:45PM Via Free Access 46 M Distribution and ecology of Gammarus tigrinus Sexton, 1939 and some other amphipod Crustacea near Beaufort (North Carolina, U.S.A.) by Marion J. van Maren Institute of Taxonomie Zoology, University of Amsterdam, The Netherlands & Duke University Marine Laboratory, Beaufort, North Carolina, U.S.A. Summary of North America, has at some time been intro- summer distribution of duced in During 1977 the and ecology am- western Europe and was first described phipod Crustacea in the coastal plain of north Carolina were from England by Sexton (1939). Gammarus ti- studied. Ecological data were collected in particular on has invaded all Gammarus tigrinus, a North American species, which has grinus rapidly nearly oligohaline been introduced in western Europe. The present gammarid, waters in the Netherlands, competing successfully able to endure high water and adapted to a temperatures with the indigenous gammarid species. Its range wide variety of salinities, is found in the more upstream still has been parts of the estuaries in North Carolina. More downstream, extension, proceeding, surveyed by at it is Gammarus Taxonomie higher salinities, replaced by palustris , members of the Institute of Zoology while low salinities fresh at very or in water Gammarus of the University of Amsterdam, resulting in a fasciatus is commonly met. series of some data are publications & Moreover, given on the distribution and (Nijssen Stock, 1966; of several other in the Beaufort ecology amphipod species Pinkster & Stock, 1967; Dennert et al., 1968; region. Gras, 1971; Smit, 1974; Pinkster, 1975; Dieleman Résumé & Pinkster, 1977). Pendant l'été 1977 la répartition écologique de Crustacés STUDY AREA AND METHODS amphipodes a été étudiée dans la plaine littorale de Caroline du Nord. Des observations furent effectuées en particulier sur The small town of Beaufort, situated on a tongue l’écologie de Gammarus tigrinus, espèce nord-américaine in- of mainland, is water from the troduite en Europe. Ce Gammare, capable de résister à des separated by sandy offshore known Shackleford Ac- températures élevées et adapté à des salinités très variables, bank, as Bank. est trouvé dans les des parties plus en amont estuaires de the is cess to open ocean gained by the Beaufort Caroline du Nord. Plus en aval, dans les eaux méso- et Inlet. The various waterways, which communicate polyhalines, Gammarus tigrinus est remplacé par Gammarus tandis dans les eaux douces et with palustris, que oligohalines directly or indirectly Beaufort, are very com- Gammarus fasciatus est couramment rencontré. in and contain number plicated shape a large of En plus, cette étude a fourni des données sur la répartition shoals, banks and islands. et l'écologie de plusieurs autres espèces d'Amphipodes dans la région de Beaufort. While offering a variety of sandy and muddy natural rocks substrates, no true are found in the INTRODUCTION Beaufort region. Hard substrates are formed by During summer 1977 the distribution and ecology jetties, sea walls, pilings, oyster shells and by of amphipod crustaceans was investigated in the man-made miscellaneous objects (bottles, beer coastal of plain North Carolina. The The coastal the present study cans, etc.). area of mainland is was carried out during a at the Duke Univer- stay characterized by extensive Spartina marshes. The Marine Beaufort. sity Laboratory at Amphipod tidal is for mean range 0.75 m (about 0.9 m spring were taken in estuaries and freshwater samples tides). biotopes in the Beaufort to collect data on 1 region The estuary of the Newport River ), a wide the ecology of Gammarus tigrinus in particular. Irrespective of !) the salinity or current, the water types in This species, originally inhabiting the eastern coast the area are locally called "rivers". Downloaded from Brill.com10/03/2021 01:33:45PM via free access 46 M. J. VAN MAREN - AMPHIPODA FROM BEAUFORT bay with polyhaline salinities, is connected by the Adam Creek Canal with the Neuse River. In summer, the freshwater supply of the latter is low to such an extent that marine influences are still measurable as far as New Bern, a town situated at almost 100 km from where the Neuse River discharges into the Pamlico Sound. The of the river of the vegetation swamps coastal plain is characterized by the River-cypress ( Taxodium distichum),, growing in shallow water, often over a calcareous subsoil. This tree has a trunk the and gradually tapering near base root formations, which often provide the only hard in the the substrate more upstream parts of North Carolina estuaries. Sampling of the amphipods was carried out with a dip net. As far as temperature readings have been thermometer used in made, a mercury was (scale measured with the aid 0.1°C). Salinities were of a refractometer. The pH was determined with a pH- meter "Leeds & Northrop". The animals were fixed in 4% formaldehyde and preserved in 70% ethanol. In appendix II the position of the sampling stations, visited during the present study, is given. RESULTS shows the of the Fig. 1 names amphipod species sampled at different localities in the estuary of the Neuse River, as well as the salinities measured these stations. Near at the bridge on highway 43, of S.W. Askin, gammarids still occurred, but more upstream, near Kinston, none have been found. The great majority of the Neuse River stations presented a sandy substrate. Only in those places where some hard substrate was available (mostly the the provided by roots of River-cypress) gam- Fig. 1. Salinities and amphipods at the sampling stations in in the = maridean Amphipoda were captured wave- the Neuse River (station K Kinston). washed zone of the river. The temperature of the water varied from In another tributary, the South River (discharg- 18.5°C in May to 34°C in August, while the pH- ing in the Neuse River about 50 km downstream of range was 6.3-7.3. New Bern), Gammarus palustris Bousfield, in Both stations the Trent River, a occurred a of sampled 1969, at salinity 12°/ 00 and, together of the Neuse Gammarus with Mucro tributary River, yielded gammarus mucronatus (Say, 1818), at Sexton, 1939 1 and a of These were tigrinus (salinities 2°/ 00 ). salinity 18°/00 . amphipods cap- Substrate, temperatures and pH in this stream tured amongst submerged parts of the riverbank Neuse and resemble to a large degree thoseof the River vegetation, on a bottom consisting of clay estuary. mud. Downloaded from Brill.com10/03/2021 01:33:45PM via free access 48 - BIJDRAGEN TOT DE DIERKUNDE, (1) 1978 47 Appendix I enumerates the amphipod species boro, and in the Bay River (sta. 61), a tributary the well the the Pamlico Sound. the investi- found during present study, as as of During present their this salinities conditions at sampling stations. gation species was sampled at varying The have been collected: from 0 to once it was found at following amphipods 12°/ 00 (only 22°/oo)> always on sandy substrates, among roots Family GAMMARIDAE (s.l.) of the localities G. River-cypress. In some tigrinus Gammarus tigrinus Sexton, 1939 occurred together with other amphipods: In the Besides in the Neuse and Trent Rivers, Gammarus Neuse River (figs. 1 & 2), near New Bern, to- tigrinus was found in the White Oak River (fig. gether with Gammarus daiberi Bousfield, 1969 in the Sound Swans- and Heard 2), discharging Bogue near Corophium aquafuscum & Sikora, Fig. 2. Distribution of the amphipod species N.W. of Beaufort. 4 Downloaded from Brill.com10/03/2021 01:33:45PM via free access 48 M. J. VAN MAREN - AMPHIPODA FROM BEAUFORT at a of more downstream, some devoid of such a G. 1972, salinity 2°/ 00 ; places, vegetation, pa- the contained collected shells at a salinity of 12°/ sample also lustris was amongst oyster or tree 00 , Corophium lacustre Vanhöffen, 1911, Mucrogam- roots. marus mucronatus (Say, 1818) and Gammarus While collecting, the present species was easily its behaviour: palustris Bousfield, 1969; near Cherry Point (sta. recognized by particular the shrimps 6), the latter two occurred together with G. climbed out of the water (in the vial) and were at a of 10°/ in the White Oak able to "rise to their feet", like tigrinus salinity 00; beachhoppers do. River, at a salinity of l°/oo> only single specimens (Talitridae) use to of G. palustris and C. lacustre were sampled to- Ovigerous females and/or precopulae were gether with G. tigrinus. found from May to August. in Ovigerous females of G. tigrinus occurred a sample taken in June (salinity l°/oo> temp. Mucrogammarus mucronatus (Say, 1818) 25.5°C). Mucrogammarus mucronatus occurred sometimes, together with Gammarus palustris, in the Spartina Gammarus daiberi Bousfield, 1969 marshes, but never at salinities lower than 10°/00 . On mixed with Gammarus daiberi, a species closely related to muddy substrates, cobbles and with the Gammarus tigrinus, occurred latter in the shells, the present gammarid was found together samples from the head of the Neuse River estuary, with Melita nitida Smith, 1873 (viz., the Town- at salinities varying from 0 to 7°/oo- creek at Beaufort). In that case the vegetation consisted of Ulva, Fucus vesiculosus or Chaeto- Gammarus fasciatus Say, 1818 morpha. The salinities measured for Mucrogam- marus varied from to mucronatus 10 32°/ . Gammarus fasciatus was collected mainly in mod- 00 females of the oc- in Ovigerous present species erately running streams and sometimes slowly in in curred a sample collected May. running or stagnant water. Water temperatures varied from 15.5 to 27°C, the pH from 5.6 to 7.5, Crangonyx serratus (Embody, 1910) and the salinity values in places where G. fasciatus occurred did not exceed 5°/oo- h lives in shallow Crangonyx serratus seems to prefer stagnant water small it freshwater streams or small marshy ponds (to- of marshy ponds, although sometimes with in with gether Crangonyx serratus (Embody, 1910)), occurs running water, not rarely together in varying depth from 0.3 m to a few meters, Gammarus fasciatus.
Load more

Recommended publications
  • (Crustacea : Amphipoda) of the Lower Chesapeake Estuaries
    W&M ScholarWorks Reports 1971 The distribution and ecology of the Gammaridea (Crustacea : Amphipoda) of the lower Chesapeake estuaries James Feely Virginia Institute of Marine Science Marvin L. Wass Virginia Institute of Marine Science Follow this and additional works at: https://scholarworks.wm.edu/reports Part of the Marine Biology Commons, Oceanography Commons, Terrestrial and Aquatic Ecology Commons, and the Zoology Commons Recommended Citation Feely, J., & Wass, M. L. (1971) The distribution and ecology of the Gammaridea (Crustacea : Amphipoda) of the lower Chesapeake estuaries. Special papers in marine science No.2. Virginia Institute of Marine Science, College of William and Mary. http://doi.org/10.21220/V5H01D This Report is brought to you for free and open access by W&M ScholarWorks. It has been accepted for inclusion in Reports by an authorized administrator of W&M ScholarWorks. For more information, please contact [email protected]. THE DISTRIBUTION AND ECOLOGY OF THE GAMMARIDEA (CRUSTACEA: AMPHIPODA) OF THE LOWER CHESAPEAKE ESTUARIES James B. Feeley and Marvin L. Wass SPECIAL PAPERS IN MARINE SCIENCE NO. 2 VIRGIN IA INSTITUTE OF MARINE SC IE NCE Gloucester Point, Virginia 23062 1971 THE DISTRIBUTION AND ECOLOGY OF THE GAMMARIDEA (CRUSTACEA: AMPHIPODA) OF THE LOWER 1 CHESAPEAKE ESTUARIES James B. Feeley and Marvin L. Wass SPECIAL PAPERS IN MARINE SCIENCE NO. 2 1971 VIRGINIA INSTITUTE OF MARINE SCIENCE Gloucester Point, Virginia 23062 This document is in part a thesis by James B. Feeley presented to the School of Marine Science of the College of William and Mary in Virginia in partial fulfillment of the requirements for the degree of Master of Arts.
    [Show full text]
  • To Down Load Appendix 1
    APPENDIX 1 Chapter 1 Pictures of dominant species ................................................................................................................................. 2 Species inventory of micro-invertebrate species found ....................................................................................... 16 Bathymetry Map of Pleasant Bay ........................................................................................................................ 18 Eelgrass Locations in Pleasant Bay ..................................................................................................................... 19 Sidescan Map of Pleasant Bay ............................................................................................................................. 20 Chapter 2 Species inventory of macro-invertebrate and fish species by gear type .............................................................. 21 Chapter 3 Prey otoliths and hard parts recovered during seal scat processing ..................................................................... 24 1 Pictures of dominant species Disclaimer: biological samples were treated with ethanol and Rose Bengal in the laboratory to preserve the samples. Rose Bengal is a stain commonly used in microscopy and stains cell tissue a bright pink. This is useful in the visual detection of microscopic animals in sediment samples. An overwhelming majority of micro invertebrate species do not have common names. The common names used here are listed in Pollock’s “A Practical Guide
    [Show full text]
  • Invertebrate ID Guide
    11/13/13 1 This book is a compilation of identification resources for invertebrates found in stomach samples. By no means is it a complete list of all possible prey types. It is simply what has been found in past ChesMMAP and NEAMAP diet studies. A copy of this document is stored in both the ChesMMAP and NEAMAP lab network drives in a folder called ID Guides, along with other useful identification keys, articles, documents, and photos. If you want to see a larger version of any of the images in this document you can simply open the file and zoom in on the picture, or you can open the original file for the photo by navigating to the appropriate subfolder within the Fisheries Gut Lab folder. Other useful links for identification: Isopods http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-33/htm/doc.html http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-48/htm/doc.html Polychaetes http://web.vims.edu/bio/benthic/polychaete.html http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-34/htm/doc.html Cephalopods http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-44/htm/doc.html Amphipods http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-67/htm/doc.html Molluscs http://www.oceanica.cofc.edu/shellguide/ http://www.jaxshells.org/slife4.htm Bivalves http://www.jaxshells.org/atlanticb.htm Gastropods http://www.jaxshells.org/atlantic.htm Crustaceans http://www.jaxshells.org/slifex26.htm Echinoderms http://www.jaxshells.org/eich26.htm 2 PROTOZOA (FORAMINIFERA) ................................................................................................................................ 4 PORIFERA (SPONGES) ............................................................................................................................................... 4 CNIDARIA (JELLYFISHES, HYDROIDS, SEA ANEMONES) ............................................................................... 4 CTENOPHORA (COMB JELLIES)............................................................................................................................
    [Show full text]
  • 1 Amphipoda of the Northeast Pacific
    Amphipoda of the Northeast Pacific (Equator to Aleutians, intertidal to abyss): XIV. Gammaroidea – an updated and expanded review Donald B. Cadien, LACSD 22Jul2004 (revised 1Mar2015) Preface The purpose of this review is to bring together information on all of the species reported to occur in the NEP fauna. It is not a straight path to the identification of your unknown animal. It is a resource guide to assist you in making the required identification in full knowledge of what the possibilities are. Never forget that there are other, as yet unreported species from the coverage area; some described, some new to science. The natural world is wonderfully diverse, and we have just scratched its surface. Introduction to the Gammaroidea The superfamily, while having both marine and freshwater members, is most prominent in epigean fresh-waters. Marine occurrences are coastal, with no superfamily members belonging to pelagic or deep-sea communities. There is a vast literature on the fresh-water members of the superfamily, particularly in European waters, where they have been studied for centuries. According to Bousfield (1982) they are a fairly recently derived group which appeared in the Tertiary. The superfamily contains a number of families not represented in the NEP, including the Acanthogammaridae, Caspicolidae, Macrohectopidae, Micruropidae, Pachyschesidae, and the Typhlogammaridae. These families are most prominent in Indo- European fresh-water habitats. The Gammaridae is poorly represented in the NEP, with only one widely distributed arctic-boreal form, and two species introduced from the Atlantic. One additional member of the family has been introduced to the waters of the saline relict Salton Sea, now landlocked in southern California (J.
    [Show full text]
  • Guide to Common Tidal Marsh Invertebrates of the Northeastern
    - J Mississippi Alabama Sea Grant Consortium MASGP - 79 - 004 Guide to Common Tidal Marsh Invertebrates of the Northeastern Gulf of Mexico by Richard W. Heard University of South Alabama, Mobile, AL 36688 and Gulf Coast Research Laboratory, Ocean Springs, MS 39564* Illustrations by Linda B. Lutz This work is a result of research sponsored in part by the U.S. Department of Commerce, NOAA, Office of Sea Grant, under Grant Nos. 04-S-MOl-92, NA79AA-D-00049, and NASIAA-D-00050, by the Mississippi-Alabama Sea Gram Consortium, by the University of South Alabama, by the Gulf Coast Research Laboratory, and by the Marine Environmental Sciences Consortium. The U.S. Government is authorized to produce and distribute reprints for govern­ mental purposes notwithstanding any copyright notation that may appear hereon. • Present address. This Handbook is dedicated to WILL HOLMES friend and gentleman Copyright© 1982 by Mississippi-Alabama Sea Grant Consortium and R. W. Heard All rights reserved. No part of this book may be reproduced in any manner without permission from the author. CONTENTS PREFACE . ....... .... ......... .... Family Mysidae. .. .. .. .. .. 27 Order Tanaidacea (Tanaids) . ..... .. 28 INTRODUCTION ........................ Family Paratanaidae.. .. .. .. 29 SALTMARSH INVERTEBRATES. .. .. .. 3 Family Apseudidae . .. .. .. .. 30 Order Cumacea. .. .. .. .. 30 Phylum Cnidaria (=Coelenterata) .. .. .. .. 3 Family Nannasticidae. .. .. 31 Class Anthozoa. .. .. .. .. .. .. .. 3 Order Isopoda (Isopods) . .. .. .. 32 Family Edwardsiidae . .. .. .. .. 3 Family Anthuridae (Anthurids) . .. 32 Phylum Annelida (Annelids) . .. .. .. .. .. 3 Family Sphaeromidae (Sphaeromids) 32 Class Oligochaeta (Oligochaetes). .. .. .. 3 Family Munnidae . .. .. .. .. 34 Class Hirudinea (Leeches) . .. .. .. 4 Family Asellidae . .. .. .. .. 34 Class Polychaeta (polychaetes).. .. .. .. .. 4 Family Bopyridae . .. .. .. .. 35 Family Nereidae (Nereids). .. .. .. .. 4 Order Amphipoda (Amphipods) . ... 36 Family Pilargiidae (pilargiids). .. .. .. .. 6 Family Hyalidae .
    [Show full text]
  • Noaa 13648 DS1.Pdf
    r LOAI<CO Qpy N Guide to Gammon Tidal IVlarsh Invertebrates of the Northeastern Gulf of IVlexico by Richard W. Heard UniversityofSouth Alabama, Mobile, AL 36688 and CiulfCoast Research Laboratory, Ocean Springs, MS39564" Illustrations by rimed:tul""'"' ' "=tel' ""'Oo' OR" Iindu B. I utz URt,i',"::.:l'.'.;,',-'-.,":,':::.';..-'",r;»:.",'> i;."<l'IPUS Is,i<'<i":-' "l;~:», li I lb~'ab2 Thisv,ork isa resultofreseaich sponsored inpart by the U.S. Department ofCommerce, NOAA, Office ofSea Grant, underGrani Nos. 04 8 Mol 92,NA79AA D 00049,and NA81AA D 00050, bythe Mississippi Alabama SeaGrant Consortium, byche University ofSouth Alabama, bythe Gulf Coast Research Laboratory, andby the Marine EnvironmentalSciences Consortium. TheU.S. Government isauthorized toproduce anddistribute reprints forgovern- inentalpurposes notwithstanding anycopyright notation that may appear hereon. *Preseitt address. This Handbook is dedicated to WILL HOLMES friend and gentleman Copyright! 1982by Mississippi hlabama SeaGrant Consortium and R. W. Heard All rightsreserved. No part of thisbook may be reproduced in any manner without permissionfrom the author. Printed by Reinbold Lithographing& PrintingCo., BooneviBe,MS 38829. CONTENTS 27 PREFACE FamilyMysidae OrderTanaidacea Tanaids!,....... 28 INTRODUCTION FamilyParatanaidae........, .. 29 30 SALTMARSH INVERTEBRATES ., FamilyApseudidae,......,... Order Cumacea 30 PhylumCnidaria =Coelenterata!......, . FamilyNannasticidae......,... 31 32 Class Anthozoa OrderIsopoda Isopods! 32 Fainily Edwardsiidae. FamilyAnthuridae
    [Show full text]
  • Invertebrate Identification Guide for Chesmmap and NEAMAP Diet Analysis Studies
    W&M ScholarWorks Reports 11-13-2013 Invertebrate Identification Guide for ChesMMAP and NEAMAP Diet Analysis Studies Chesapeake Bay Multispecies Monitoring and Assessment Program Follow this and additional works at: https://scholarworks.wm.edu/reports Part of the Marine Biology Commons Recommended Citation Chesapeake Bay Multispecies Monitoring and Assessment Program. (2013) Invertebrate Identification Guide for ChesMMAP and NEAMAP Diet Analysis Studies. Virginia Institute of Marine Science, William & Mary. https://doi.org/10.25773/b0y5-k411 This Report is brought to you for free and open access by W&M ScholarWorks. It has been accepted for inclusion in Reports by an authorized administrator of W&M ScholarWorks. For more information, please contact [email protected]. 11/13/13 1 This book is a compilation of identification resources for invertebrates found in stomach samples. By no means is it a complete list of all possible prey types. It is simply what has been found in past ChesMMAP and NEAMAP diet studies. A copy of this document is stored in both the ChesMMAP and NEAMAP lab network drives in a folder called ID Guides, along with other useful identification keys, articles, documents, and photos. If you want to see a larger version of any of the images in this document you can simply open the file and zoom in on the picture, or you can open the original file for the photo by navigating to the appropriate subfolder within the Fisheries Gut Lab folder. Other useful links for identification: Isopods http://www.19thcenturyscience.org/HMSC/HMSC-Reports/Zool-33/htm/doc.html
    [Show full text]
  • Inventory of Intertidal Habitats: Boston Harbor Islands, a National Park Area
    National Park Service U.S. Department of the Interior Northeast Region Natural Resource Stewardship and Science Inventory of Intertidal Habitats: Boston Harbor Islands, a national park area Richard Bell, Mark Chandler, Robert Buchsbaum, and Charles Roman Technical Report NPS/NERBOST/NRTR-2004/1 Photo credit: Pat Morss The Northeast Region of the National Park Service (NPS) is charged with preserving, protecting, and enhancing the natural resources and processes of national parks and related areas in 13 New England and Mid-Atlantic states. The diversity of parks and their resources are reflected in their designations as national parks, seashores, historic sites, recreation areas, military parks, memorials, and rivers and trails. Biological, physical, and social science research results, natural resource inventory and monitoring data, scientific literature reviews, bibliographies, and proceedings of technical workshops and conferences related to 80 of these park units in Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, New York, Rhode Island, and Vermont are disseminated through the NPS/NERBOST Technical Report and Natural Resources Report series. The reports are numbered according to fiscal year and are produced in accordance with the Natural Resource Publication Management Handbook (1991). Documents in this series are not intended for use in open literature. Mention of trade names or commercial products does not constitute endorsement or recommendation for use by the National Park Service. Individual parks may also disseminate information through their own report series. Reports in these series are produced in limited quantities and, as long as the supply lasts, may be obtained by sending a request to the address on the back cover.
    [Show full text]
  • APPENDIX A. USFWS Interim Guidance for Mosquito Management on National Wildlife Refuges
    APPENDIX A. USFWS Interim Guidance for Mosquito Management on National Wildlife Refuges INTERIM MOSQUITO GUIDANCE 2005 4/2005 In Reply Refer To: FWS/ANRS-NR-WR/020301 Memorandum To: Regional Directors, Regions 1-7 Manager, California/Nevada Operations Office From: Director Subject: Interim Guidance for Mosquito Management on National Wildlife Refuges A draft policy on mosquito management for the National Wildlife Refuge System is expected to be released for public comment within the next few months. In the interim, and while the draft policy is undergoing public review, the attached document has been prepared to provide refuges with a Systemwide, consistent process for addressing mosquito management issues. Because refuges with existing mosquito management programs have already begun the process for the current season, there will be a 6-month transition period during which these refuges should review their existing programs to ensure consistency with this guidance. Refuges with no current mosquito management program should follow the attached guidance when health threats from refuge-based mosquitoes are identified. Mosquito management on national wildlife refuges can be a very controversial issue. The Service is committed to protecting the health of humans, wildlife, and domestic animals while maintaining our statutory and policy obligations for wildlife conservation. For additional information, please contact Michael Higgins at (410) 573-4520. Attachment 1 A-1 INTERIM MOSQUITO GUIDANCE 2005 4/2005 Cc: 3238-MIB-FWS/Directorate File 3238-MIB-FWS/CCU
    [Show full text]
  • Amphipoda: Gammaridae) in Warm Temperate Estuarine Habitats, York River, Virginia
    W&M ScholarWorks Dissertations, Theses, and Masters Projects Theses, Dissertations, & Master Projects 1983 Life history and secondary production of the crustacean gammarus mucronatus say (amphipoda: gammaridae) in warm temperate estuarine habitats, York River, Virginia Thomas J. Fredette College of William and Mary - Virginia Institute of Marine Science Follow this and additional works at: https://scholarworks.wm.edu/etd Part of the Marine Biology Commons Recommended Citation Fredette, Thomas J., "Life history and secondary production of the crustacean gammarus mucronatus say (amphipoda: gammaridae) in warm temperate estuarine habitats, York River, Virginia" (1983). Dissertations, Theses, and Masters Projects. Paper 1539616648. https://dx.doi.org/doi:10.25773/v5-btmt-g654 This Dissertation is brought to you for free and open access by the Theses, Dissertations, & Master Projects at W&M ScholarWorks. It has been accepted for inclusion in Dissertations, Theses, and Masters Projects by an authorized administrator of W&M ScholarWorks. For more information, please contact [email protected]. INFORMATION TO USERS T h is reproduction was made from a copy o f a document sent to us for microfilming. While the most advanced technology has been used to photograph and reproduce th is document, the quality o f the reproduction is heavily dependent upon the quality of the material submitted. T h e following explanation o f techniques is provided to help clarify markings or notations which may appear o n this reproduction. 1. The sign or “target” for pages apparently lacking from the document photographed is “Missing Page(s)”. If it was possible to obtain the missing page(s) or section, they are spliced into the film along with adjacent pages.
    [Show full text]
  • Key to the Freshwater Malacostraca (Crustacea) of the Mid-Atlantic Region
    Key to the Freshwater Malacostraca (Crustacea) of the Mid-Atlantic Region EPA- 230-R-08-017 November 2008 Key to the Freshwater Malacostraca (Crustacea) of the Mid-Atlantic Region Prepared For: U.S. Environmental Protection Agency Office of Environmental Information Office of Information and Analysis Access Environmental Analysis Division Washington, DC 20460 Prepared By: EcoAnalysts, Inc. 1420 S. Blaine St., Suite 14 Moscow, ID 83843 Contents Notice...............................................................................................................................ii Acknowledgements ..........................................................................................................ii A. Key to the Classes of North American Freshwater Crustacea (and subclasses of Maxillopoda). ............................................................................................................. 1 B. Key to the Malacostracan Orders ............................................................................... 4 C. Key to the Freshwater Mysida .................................................................................... 7 D. Key to the Freshwater Isopoda................................................................................... 9 E. Key to the Freshwater Amphipoda............................................................................ 22 F. Key to the Freshwater Decapoda.............................................................................. 32 References...................................................................................................................
    [Show full text]
  • Zootaxa, a New Species of the Genus Gammarus
    Zootaxa 2015: 42–54 (2009) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Article ZOOTAXA Copyright © 2009 · Magnolia Press ISSN 1175-5334 (online edition) A new species of the genus Gammarus (Crustacea: Amphipoda: Gammaridae) from the low salinity habitats in the northern Gulf of Mexico BRENT P. THOMA1,3 & RICHARD W. HEARD2 The University of Southern Mississippi, Department of Coastal Sciences, P.O. Box 7000 Ocean Springs, Mississippi 39566-7000, U.S.A. E-mail: [email protected]; [email protected]. 3Corresponding author Abstract In the northern Gulf of Mexico, Gammarus mucronatus sensu lato is represented by at least two forms, G. mucronatus sensu stricto and a less common “macromucronate” form, which appears to be restricted to low salinity habitats. These two forms have traditionally been separated using the size or angle of projection of the dorsal mucronations (processes). However, because of variability in the development of the processes, it is unclear whether this and other morphological differences between G. mucronatus sensu stricto and the “macromucronate” form are ecophenotypic or reflect distinct and separate species. Detailed morphological analyses indicate that these two forms represent distinct species; Gammarus lecroyae, new species, is described in detail and a key to the marine and estuarine Gammarus species from the northern Gulf of Mexico is provided. Key words: Gulf of Mexico, Gammarus, Amphipoda, taxonomy Introduction The common estuarine amphipod Gammarus mucronatus Say, 1818, originally described based on material from Egg Harbor, New Jersey and material from near the mouth of the St. John’s River, Florida (Say 1818), reportedly ranges from the Gulf of St.
    [Show full text]