Abstract the Population Dynamics of Mitten Crab
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Occurrence of Shell Disease and Carapace Abnormalities on Natural
JMBA2 - Biodiversity Records Published on-line Occurrence of shell disease and carapace abnormalities on natural population of Neohelice granulata (Crustacea: Varunidae) from a tropical mangrove forest, Brazil Rafael Augusto Gregati* and Maria Lucia Negreiros Fransozo NEBECC (Group of Studies on Crustacean Biology, Ecology and Culture), Departamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista (UNESP) 18618-000, Botucatu, SP, Brazil. *Corresponding author, e-mail: [email protected] In this note, we registered the occurrence of shell diseases and carapace abnormalities on a natural population of Neohelice granulata from a tropical mangrove forest, in South America, as a part of a wide ecological study. The occurrence of 32 adult crabs (1.77%) with black or brown spotted shell, or deformities on carapace was registered, collected in the autumn and winter seasons. The low prevalence of shell diseases and abnormalities in this natural population is considered normal and probably caused by injuries occurred during the moult period of crabs. Keywords: Neohelice granulata, shell disease, carapace abnormalities Introduction Shell diseases and external abnormalities or deformities are just one of the common problems affecting freshwater and marine crustaceans. These diseases have been reported in many natural crustacean populations, principally in many species of economic importance such as the Alaskan king crab, portunid crabs, shrimps and lobsters (Maloy, 1978; Sindermann, 1989; Noga et al., 2000). The shell diseases are characterized by various types of erosive lesions on the carapace (Johnson, 1983; Sindermann & Lightner, 1988) and the classical and most common kind of shell disease is know as ‘brown spot’ or ‘black spot’, which consists of various-sized foci of hyperpigmentation (Rosen, 1970; Noga et al., 2000). -
Natural Diet of Neohelice Granulata (Dana, 1851) (Crustacea, Varunidae) in Two Salt Marshes of the Estuarine Region of the Lagoa Dos Patos Lagoon
91 Vol.54, n. 1: pp. 91-98, January-February 2011 BRAZILIAN ARCHIVES OF ISSN 1516-8913 Printed in Brazil BIOLOGY AND TECHNOLOGY AN INTERNATIONAL JOURNAL Natural Diet of Neohelice granulata (Dana, 1851) (Crustacea, Varunidae) in Two Salt Marshes of the Estuarine Region of the Lagoa dos Patos Lagoon Roberta Araujo Barutot 1*, Fernando D´Incao 1 and Duane Barros Fonseca 2 1Instituto de Oceanografia; Universidade Federal do Rio Grande; 96201-900; Rio Grande - RS - Brasil. 2Instituto de Ciências Biológicas; Universidade Federal do Rio Grande; 96201-900; Rio Grande - RS - Brasil ABSTRACT Natural diet of Neohelice granulata in two salt marshes of Lagoa dos Patos, RS were studied. Sampling was performed seasonally and crabs were captured by hand by three persons during one hour, fixed in formaldehyde (4%) during 24 h, transferred to alcohol (70%). Each foregut was weighed and repletion level was determined. Differences between sexes in the frequencies of occurrence of items were tested by χ2test. A total of 452 guts were analyzed. Quali-quantitative analyses were calculated following the method of relative frequency occurrence and relative frequency of the points. At both sites, for both sexes and in all seasons, the main food items were sediment, Spartina sp. and plant detritus. The highest values of mean repletion index were estimated for the spring and summer. Analysing both salt marshes, in different seasons significant shifts in the natural diet of Neohelice granulata was not observed throughout the period of study. Key words : Crustacea, Brachyura, diet, salt marsh INTRODUCTION Neohelice granulata (Dana, 1851) is a crab found in salt marshes and mangroves of the Southern Clarification of trophic relationships is one Atlantic Coast, from Rio de Janeiro (Brazil) to important approach for understanding the Patagonia (Argentina) (Melo, 1996), and it is one organization of communities. -
Biodiversity Risk and Benefit Assessment for Pacific Oyster (Crassostrea Gigas) in South Africa
Biodiversity Risk and Benefit Assessment for Pacific oyster (Crassostrea gigas) in South Africa Prepared in Accordance with Section 14 of the Alien and Invasive Species Regulations, 2014 (Government Notice R 598 of 01 August 2014), promulgated in terms of the National Environmental Management: Biodiversity Act (Act No. 10 of 2004). September 2019 Biodiversity Risk and Benefit Assessment for Pacific oyster (Crassostrea gigas) in South Africa Document Title Biodiversity Risk and Benefit Assessment for Pacific oyster (Crassostrea gigas) in South Africa. Edition Date September 2019 Prepared For Directorate: Sustainable Aquaculture Management Department of Environment, Forestry and Fisheries Private Bag X2 Roggebaai, 8001 www.daff.gov.za/daffweb3/Branches/Fisheries- Management/Aquaculture-and-Economic- Development Originally Prepared By Dr B. Clark (2012) Anchor Environmental Consultants Reviewed, Updated and Mr. E. Hinrichsen Recompiled By AquaEco as commisioned by Enterprises at (2019) University of Pretoria 1 | P a g e Biodiversity Risk and Benefit Assessment for Pacific oyster (Crassostrea gigas) in South Africa CONTENT 1. INTRODUCTION .............................................................................................................................. 9 2. PURPOSE OF THIS RISK ASSESSMENT ..................................................................................... 9 3. THE RISK ASSESSMENT PRACTITIONER ................................................................................. 10 4. NATURE OF THE USE OF PACIFIC OYSTER -
Part I. an Annotated Checklist of Extant Brachyuran Crabs of the World
THE RAFFLES BULLETIN OF ZOOLOGY 2008 17: 1–286 Date of Publication: 31 Jan.2008 © National University of Singapore SYSTEMA BRACHYURORUM: PART I. AN ANNOTATED CHECKLIST OF EXTANT BRACHYURAN CRABS OF THE WORLD Peter K. L. Ng Raffles Museum of Biodiversity Research, Department of Biological Sciences, National University of Singapore, Kent Ridge, Singapore 119260, Republic of Singapore Email: [email protected] Danièle Guinot Muséum national d'Histoire naturelle, Département Milieux et peuplements aquatiques, 61 rue Buffon, 75005 Paris, France Email: [email protected] Peter J. F. Davie Queensland Museum, PO Box 3300, South Brisbane, Queensland, Australia Email: [email protected] ABSTRACT. – An annotated checklist of the extant brachyuran crabs of the world is presented for the first time. Over 10,500 names are treated including 6,793 valid species and subspecies (with 1,907 primary synonyms), 1,271 genera and subgenera (with 393 primary synonyms), 93 families and 38 superfamilies. Nomenclatural and taxonomic problems are reviewed in detail, and many resolved. Detailed notes and references are provided where necessary. The constitution of a large number of families and superfamilies is discussed in detail, with the positions of some taxa rearranged in an attempt to form a stable base for future taxonomic studies. This is the first time the nomenclature of any large group of decapod crustaceans has been examined in such detail. KEY WORDS. – Annotated checklist, crabs of the world, Brachyura, systematics, nomenclature. CONTENTS Preamble .................................................................................. 3 Family Cymonomidae .......................................... 32 Caveats and acknowledgements ............................................... 5 Family Phyllotymolinidae .................................... 32 Introduction .............................................................................. 6 Superfamily DROMIOIDEA ..................................... 33 The higher classification of the Brachyura ........................ -
Diversity and Life-Cycle Analysis of Pacific Ocean Zooplankton by Video Microscopy and DNA Barcoding: Crustacea
Journal of Aquaculture & Marine Biology Research Article Open Access Diversity and life-cycle analysis of Pacific Ocean zooplankton by video microscopy and DNA barcoding: Crustacea Abstract Volume 10 Issue 3 - 2021 Determining the DNA sequencing of a small element in the mitochondrial DNA (DNA Peter Bryant,1 Timothy Arehart2 barcoding) makes it possible to easily identify individuals of different larval stages of 1Department of Developmental and Cell Biology, University of marine crustaceans without the need for laboratory rearing. It can also be used to construct California, USA taxonomic trees, although it is not yet clear to what extent this barcode-based taxonomy 2Crystal Cove Conservancy, Newport Coast, CA, USA reflects more traditional morphological or molecular taxonomy. Collections of zooplankton were made using conventional plankton nets in Newport Bay and the Pacific Ocean near Correspondence: Peter Bryant, Department of Newport Beach, California (Lat. 33.628342, Long. -117.927933) between May 2013 and Developmental and Cell Biology, University of California, USA, January 2020, and individual crustacean specimens were documented by video microscopy. Email Adult crustaceans were collected from solid substrates in the same areas. Specimens were preserved in ethanol and sent to the Canadian Centre for DNA Barcoding at the Received: June 03, 2021 | Published: July 26, 2021 University of Guelph, Ontario, Canada for sequencing of the COI DNA barcode. From 1042 specimens, 544 COI sequences were obtained falling into 199 Barcode Identification Numbers (BINs), of which 76 correspond to recognized species. For 15 species of decapods (Loxorhynchus grandis, Pelia tumida, Pugettia dalli, Metacarcinus anthonyi, Metacarcinus gracilis, Pachygrapsus crassipes, Pleuroncodes planipes, Lophopanopeus sp., Pinnixa franciscana, Pinnixa tubicola, Pagurus longicarpus, Petrolisthes cabrilloi, Portunus xantusii, Hemigrapsus oregonensis, Heptacarpus brevirostris), DNA barcoding allowed the matching of different life-cycle stages (zoea, megalops, adult). -
Growth, Tolerance to Low Salinity, and Osmoregulation in Decapod Crustacean Larvae
Vol. 12: 249–260, 2011 AQUATIC BIOLOGY Published online June 1 doi: 10.3354/ab00341 Aquat Biol Growth, tolerance to low salinity, and osmoregulation in decapod crustacean larvae Gabriela Torres1, 2,*, Luis Giménez1, Klaus Anger2 1School of Ocean Sciences, Bangor University, Menai Bridge, LL59 5AB, UK 2Biologische Anstalt Helgoland, Foundation Alfred Wegener Institute for Polar and Marine Research, 27498 Helgoland, Germany ABSTRACT: Marine invertebrate larvae suffer high mortality due to abiotic and biotic stress. In planktotrophic larvae, mortality may be minimised if growth rates are maximised. In estuaries and coastal habitats however, larval growth may be limited by salinity stress, which is a key factor select- ing for particular physiological adaptations such as osmoregulation. These mechanisms may be ener- getically costly, leading to reductions in growth. Alternatively, the metabolic costs of osmoregulation may be offset by the capacity maintaining high growth at low salinities. Here we attempted identify general response patterns in larval growth at reduced salinities by comparing 12 species of decapod crustaceans with differing levels of tolerance to low salinity and differing osmoregulatory capability, from osmoconformers to strong osmoregulators. Larvae possessing tolerance to a wider range in salinity were only weakly affected by low salinity levels. Larvae with a narrower tolerance range, by contrast, generally showed reductions in growth at low salinity. The negative effect of low salinity on growth decreased with increasing osmoregulatory capacity. Therefore, the ability to osmoregulate allows for stable growth. In euryhaline larval decapods, the capacity to maintain high growth rates in physically variable environments such as estuaries appears thus to be largely unaffected by the energetic costs of osmoregulation. -
Native Decapoda
NATIVE DECAPODA Dungeness crab - Metacarcinus magister DESCRIPTION This crab has white-tipped pinchers on the claws, and the top edges and upper pincers are sawtoothed with dozens of teeth along each edge. The last three joints of the last pair of walking legs have a comb-like fringe of hair on the lower edge. Also the tip of the last segment of the tail flap is rounded as compared to the pointed last segment of many other crabs. RANGE Alaska's Aleutian Islands south to Pt Conception in California SIZE Carapace width to 25 cm (9 inches), but typically less than 20 cm STATUS Native; see the full record at http://www.dfg.ca.gov/marine/dungeness_crab.asp COLOR Light reddish brown on the back, with a purplish wash anteriorly in some specimens. Underside whitish to light orange. HABITAT Rock, sand and eelgrass TIDAL HEIGHT Subtidal to offshore SALINITY Normal range 10–32ppt; 15ppt optimum for hatching TEMPERATURE Normally found from 3–19°C SIMILAR SPECIES Unlike the green crab, it has 10 spines on either side of the eye sockets and grows much larger. It can be distinguished from Metacarcinus gracilis which also has white claws, by the carapace being widest at the 10th tooth vs the 9th in M. gracilis . Unlike the red rock crab it has a tooth on the dorsal margin of its white tipped claw (this and other similar Cancer crabs have black tipped claws). ©Aaron Baldwin © bioweb.uwlax.edu red rock crab - note black tipped claws Plate Watch Monitoring Program . -
Burrowing Activity of the Neohelice Granulata Crab (Brachyura, Varunidae) in Southwest Atlantic Intertidal Areas
Ciencias Marinas (2018), 44(3): 155–167 http://dx.doi.org/10.7773/cm.v44i3.2851 Burrowing activity of the Neohelice granulata crab (Brachyura, Varunidae) in southwest Atlantic intertidal areas Actividad cavadora del cangrejo Neohelice granulata (Brachyura, Varunidae) en sitios intermareales del atlántico sudoccidental Sabrina Angeletti1*, Patricia M Cervellini1, Leticia Lescano2,3 1 Instituto de Ciencias Biológicas y Biomédicas del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas-Universidad Nacional del Sur (CONICET-UNS), San Juan 670, 8000-Bahía Blanca, Argentina. 2 Departamento de Geología, Universidad Nacional del Sur, San Juan 670, 8000-Bahía Blanca, Argentina. 3 Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Calle 526 entre 10 y 11, 1900-La Plata, Argentina. * Corresponding author. E-mail: [email protected] A. The burrowing and semiterrestrial crab Neohelice granulata actively and constantly builds its burrows in the intertidal zone of the Bahía Blanca Estuary during low tide. Differences in structural morphology of N. granulata burrows and burrowing activities in contrasting microhabitats (saltmarsh and mudflat) were analyzed and related to several conditions, such as tide level, substrate type, sediment properties, and population density. In the mudflat the higher density of total burrows in autumn (172 burrows·m–2) was associated with molt timing, and the higher density of active burrows in summer (144 burrows·m–2) was associated with reproductive migration. Sediments from biogenic mounds (removed by crabs) showed higher water content and penetrability than surface sediments (control), suggesting that bioturbation increases the values of these parameters. Grain size distribution profiles and mineralogical composition did not vary between microhabitats or between seasons. -
Open Ocean Intake Effects Study
City of Santa Cruz Water Department & Soquel Creek Water District scwd2 Desalination Program Open Ocean Intake Effects Study December 2010 Submitted to: Ms. Heidi Luckenbach City of Santa Cruz 212 Locust Street Santa Cruz, CA 95060 Prepared by: Environmental ESLO2010-017.1 [Blank Page] ACKNOWLEDGEMENTS Tenera Environmental wishes to acknowledge the valuable contributions of the Santa Cruz Water Department, Soquel Creek Water District, and scwd² Task Force in conducting the Open Ocean Intake Effects Study. Specifically, Tenera would like to acknowledge the efforts of: City of Santa Cruz Water Department Soquel Creek Water District Bill Kocher, Director Laura Brown, General Manager Linette Almond, Engineering Manager Melanie Mow Schumacher, Public Information Heidi R. Luckenbach, Program Coordinator Coordinator Leah Van Der Maaten, Associate Engineer Catherine Borrowman, Professional and Technical scwd² Task Force Assistant Ryan Coonerty Todd Reynolds, Kennedy/Jenks and scwd² Bruce Daniels Technical Advisor Bruce Jaffe Dan Kriege Thomas LaHue Don Lane Cynthia Mathews Mike Rotkin Ed Porter Tenera’s project team included the following members: David L. Mayer, Ph.D., Tenera Environmental President and Principal Scientist John Steinbeck, Tenera Environmental Vice President and Principal Scientist Carol Raifsnider, Tenera Environmental Director of Operations and Principal Scientist Technical review and advice was provided by: Pete Raimondi, Ph.D., UCSC, Professor of Ecology and Evolutionary Biology in the Earth and Marine Sciences Dept. Gregor -
Harbor Seal Species Profile Encyclopedia of Puget Sound June 9, 2014
(Photograph by G. E. Davis) Harbor seal species profile Encyclopedia of Puget Sound June 9, 2014 Jacqlynn C. Zier and Joseph K. Gaydos* SeaDoc Society / UC Davis’ Karen C. Drayer Wildlife Health Center Orcas Island Office 942 Deer Harbor Road, Eastsound, WA 98245 *Corresponding author [email protected] Table of Contents Introduction ............................................................................................................. 3 Distribution .............................................................................................................. 3 Global .............................................................................................................................................................................. 3 Local ................................................................................................................................................................................ 3 1 Populations .............................................................................................................. 4 Genetic diversity ........................................................................................................................................................ 4 Population size ........................................................................................................................................................... 5 Longevity and survival .......................................................................................................................................... -
2018 Master Plan for Fisheries: a Guide for Implementing the Marine
2018 Master Plan for Fisheries A Guide for Implementation of the Marine Life Management Act June 2018 State of California The Natural Resources Agency Department of Fish and Wildlife Acknowledgements The Marine Life Management Act (Appendix A) emphasizes the importance of stakeholder engagement in all areas of management, including the development and revision of the Master Plan. The Department thanks and acknowledges Tribes and tribal communities, and stakeholders for the thoughtful input that has been provided in a range of venues and formats throughout the two-year development of this 2018 Master Plan. The Department also appreciates the generous funding from the Ocean Protection Council and the Resources Legacy Fund, and the numerous partners who provided background material and tools for consideration as part of the preparation of the 2018 Master Plan. See Appendix B for a complete list of these partnerships and engagement efforts. Executive summary The Marine Life Management Act (MLMA) is California’s primary fisheries management law. It directs the California Department of Fish and Wildlife (Department) to develop a Master Plan to guide its implementation. The original Master Plan, adopted in 2001, is being updated to reflect new priorities and emerging management strategies for achieving the MLMA’s goals, and to better describe the Department’s inclusion of MLMA principles in management decisions. The 2018 Master Plan (Master Plan) replaces the original and is re-structured to better meet the specific management objectives identified in the MLMA. It is intended to be both a roadmap and a toolbox for implementation, providing guidance and direction in the following areas: Prioritization of management efforts The Master Plan includes an interim list of prioritized species for management action based on the results of a Productivity and Susceptibility Analysis (PSA). -
1 Metagenetic Analysis of 2018 and 2019 Plankton Samples from Prince
Metagenetic Analysis of 2018 and 2019 Plankton Samples from Prince William Sound, Alaska. Report to Prince William Sound Regional Citizens’ Advisory Council (PWSRCAC) From Molecular Ecology Laboratory Moss Landing Marine Laboratory Dr. Jonathan Geller Melinda Wheelock Martin Guo Any opinions expressed in this PWSRCAC-commissioned report are not necessarily those of PWSRCAC. April 13, 2020 ABSTRACT This report describes the methods and findings of the metagenetic analysis of plankton samples from the waters of Prince William Sound (PWS), Alaska, taken in May of 2018 and 2019. The study was done to identify zooplankton, in particular the larvae of benthic non-indigenous species (NIS). Plankton samples, collected by the Prince William Sound Science Center (PWSSC), were analyzed by the Molecular Ecology Laboratory at the Moss Landing Marine Laboratories. The samples were taken from five stations in Port Valdez and nearby in PWS. DNA was extracted from bulk plankton and a portion of the mitochondrial Cytochrome c oxidase subunit 1 gene (the most commonly used DNA barcode for animals) was amplified by polymerase chain reaction (PCR). Products of PCR were sequenced using Illumina reagents and MiSeq instrument. In 2018, 257 operational taxonomic units (OTU; an approximation of biological species) were found and 60 were identified to species. In 2019, 523 OTU were found and 126 were identified to species. Most OTU had no reference sequence and therefore could not be identified. Most identified species were crustaceans and mollusks, and none were non-native. Certain species typical of fouling communities, such as Porifera (sponges) and Bryozoa (moss animals) were scarce. Larvae of many species in these phyla are poorly dispersing, such that they will be found in abundance only in close proximity to adult populations.