DOCSLIB.ORG

Chattooga River Crayfish (Cambarus Scotti)

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Chattooga River Crayfish (Cambarus Scotti) Comprehensive Report Species - Cambarus scotti Page 1 of7 ~ NatureServe UEXPLORER Soarch About the Dat{i About Us " Contact Us Halp «Previous I Next» View Glossary Cambarus scottl- Hobbs, 1981 Coogle Chattooga River Crayfish Search for Images on Google Related ITIS Name(s): Cambarus scolfiHobbs, 1981 (TSN 97403) Unique Identifier: ELEMENT_GLOBAL,2.115192 Element Code: ICMAL07740 Informal Taxonomy: Animals, Invertebrates - Crustaceans - Crayfishes Kingdom Phylum Class Order Family Genus Animalia Crustacea Malacostraca Decapoda Cambaridae Cambarus Genus Size: D- Medium to large genus (21+ species) Check Ihis box 10 expand all reporl seclions: 0 Concept Hefercnce Concept Reference: Hobbs, Horton. H. Jr. 1989. An l!iuslrated Checklist of the American crayfishes (Decapoda: Astacidae, Cambaridae & Parastacidae). Smithsonian Contributions to Zoology 480. Smithsonian Institute Press, Washington, D. C. 236 pp. Concept Reference Code: B89HOBOI GAUS Name Used in Concept Reference: Cambarus scotti -~om;Glvalion ::>Iaiw; NaluroServe Stalus Global Sialus: G3 Global Sialus Lasl Reviewed: 01Jul2009 Global Status Last Changed: 15Jun2000 Rounded Global Slatus: G3 - Vulnerable Reasons: This species only occurs in nine iocalities along Ihe Coosa River basin (extent <5000 sq. km). II has nol been found in any other stream systems and is thought to be endemic to this river. However, there is information major threats which may be having an impact on this species, but it has been described as abundant at some sites where it occurs; especially sites where it was recently found in the Coosa basin in Alabama. It seems secure throughout at least the southern portion of its range. Nation: United States National Slatus: N3 Iu.s. & Canada State/Province Sialus I !United StatesllAiabama (SNR), Georgia (S2S3)1 Other Statuses IUCN Red List Category: VU - Vulnerabte American Fisheries Society Slatus: Threatened (01Jan1996) NalureServc Global Conservation Status Factors Range Extenl: 1000-5000 square km (about 400-2000 square miles) Range Extent Comments: Reslricted to the Chattooga River basin (Upper Coosa system) in Chattooga and Walker counties in Georgia and Cherokee County, Alabama. The Alabama specimens are tentatively assigned to this species, but do not share all http://www,natureselve.org/explorer/servletINatureServe?sourceTemplate=tabnlac.report.,.. 3127120 12 Comprehensive RepOli Species - Cambarus scotti Page 2 of7 characters (Hobbs 1981), although it is listed as occurring In Alabama in Taylor et al. (2007). Mirarchi et al. (2004; appendix 1.2 pub. separately) lists this species in Alabama from 9 records in the upper Coosa River system (Chatlooga River). Number of Occurrences: 21 - 80 Number of Occurrences Comments: Collected at 14 sites In Chatlooga (Clarks Creek, Lyerly Creek, Challooga River in 3 sites, Chappel Creek, Cane Creek, Perenniai Spring Run) and Walker Cos. (Cane Creek at 2 sites, Town Creek, Duck Creek at 2 sites), Georgia and five sites in Cherokee (creek north of Gaylesville, Terrapin Creek at2 sites, Challooga River), Calhoun (Choccolocco Creek, Terrapin Creek, tributary to Terrapin Creek at 2 sites), and Sl. Clair Cos. (stream east of Blount Co. line), Alabama (Hobbs, 1981). Mirarchi et ai. (2004; appendix 1.2 pub. separately) and Schuster and Taylor (2004) list this species in Alabama from 9 records in the upper Coosa River system (Chatlooga River) (Schuster et aI., 2008) in Calhoun, Cherokee, and Sl. Clair Cos. There Is one unverified lot in USNM from a creek in Greenville Co., South Carolina. Population Size: Unknown Overall Threat Impact Comments: It is unknown whether Cambarus scotti is impacted by any major threat process. However, it is likely to be undergoing localized declines due to urbanization, alterations to the hydrological regime and water pollution. Shorl-term Trend: Relatively stable (~10% change) Shari-term Trend Comments: Where collected in Alabama recently, it was found to be common where tound (G. Schuster, C. Taylor, pers. comm., 2009). Long-term Trend: Increase of 10-25% to decline of 30% Long-term Trend Comments: Historically, Ortmann (1931) noted a Cambarus montanus acuminatus from the Chatlooga River in trion, Chatlooga Co., Georgia, bul Hobbs (1981) determined this to be what he laler described as Cambarus scotti. Also, specimens from Town Creek (at Roule S2557) north of Lafayelle in Walker Co, Georgia, were also identified by Hobbs (1981) as this species. Hart and Hart (1974) cited it as a host of Dactylocythere falcata (ostracod) in a stream 5.2 miles south of Summervilleon U.S. 271n Chatlooga Co., Georgia. Other NatureServe Conservation Status Information Distribution Global Range: (1000-5000 square km (about 400-2000 square miles)) Restricted to the Chatlooga River basin (Upper Coosa system) in Challooga and Walker counties in Georgia and Cherokee County, Atabama. The Alabama specimens are tentativeiy assigned to this spectes, but do not share all characters (Hobbs 1981), although it is listed as occurring in Atabama in Taylor et al. (2007). Mirarchi et al. (2004; appendix 1.2 pUb. separateiy) lists this species in Alabama from 9 records in the upper Coosa River system (Chatlooga River). U.S. States and Canadian PrOVinces http://www.natureserve.orglexplorer/servIet/NatureServe?sourceTemplate=tabulaCreport.... 3/27/20 12 Comprehensive Report Species - Cambarus scotti Page 3 of? State/Province Conservation Status i , sx- P,esumed ~• . Exiilpated ~J sH. Possibly g . ExtIrpated - 81: Cri!leally • Imperiled $2: fmpeilled D S3: Vulnerable 84: Apparently Secu,e • S5: Secure t10t 111 Ranked/Under Review (SNR/SU) Conservation Status Not Applicable (SNA) Exotio Hybrid without Conservation Value Endemism: endemic to a single" nation lu.s. & Canada State/Province Dlstributlonl IUnited Slates IIAl, GA I Range Map No map avaiiabie. Natural heritage records exist for the following U.S. counties CD State . 'County Name (FIPS Code) GA IChatlooga (13055)'. Waiker (13295)' .EXlirpated/posslbiy extlrpaled U.S. Distribution by Watershed (based on available natural heritage records) CD Watershed Region CD IWatershed Name (Watershed Code) 03 IUpper Coosa (03150105) + Naturai hentage record(s) eXist for thiS watershed • Extirpated/possibly extirpated Ecology & Life History ('IJ Basic Description: a craytish Habitat Type: Freshwater Non·Mlgrant: N locally Migrant: N long Distance Migrant: N http://www.natureserve.orglexplorer/servletlNatureServe?sourceTemplate=tabu1at~J·eport.... 3/2712012 Comprehensive Report Species - Cambarus scotti Page 4 of? Riverine Habltat(s): High gradient, MEDIUM RIVER, Moderate gradient, Riffle Habitat Comments: Is most abundant In areas with swift water and rocks (Hobbs, 1981). Economic Attributes Management SUllllnary Population/Occurrence Delineation Group Name: Crayfishes Use Class: Not applicable Minimum Criteria for an Occurrence: Occurrences are based on some evidence of historical or current presence of single or multiple specimens. including Jive specimens or recently dead shells (Le., soft tissue still attached without signs of external weathering or staining). at a given location with potentially recurring existence. Evidence is derived from reliable published observation or collection data: unpublished, though documented (Le. government or agency reports, web siles, etc.) observation or collection data; or museum specimen information. Separation Barriers: Separation barriers are based on hydrological discontinuity. Additional physical barriers, particularly for secondary and tertiary burrowers, include presence of upland habitat between water connections of a distance greater than 30 m. Migration of primary burrowers is generally not hindered by presence of upland habitat unless conditions are very xeric (dry and desert­ like) (Smith, 2001). Separation Distance for Unsuitable Habitat: 2 km Separation Distance for Suitable Habitat: 2 km Alternate Separation Procedure: Freshwater cave (troglobitic) species may occur from near entrances to very deep in cave systems. For cave species, each cave where an observation or collection was recorded (see Minimum EO Criteria, above) constitutes an element occurrence regardless of separation distance unless caves are part of a single hydrological system (see below). Occurrences are additionally separated by underground physical barriers to movement. Multiple caves within a single hydrological cave system are considered to be a single element occurrence when they are less than one km apart. Multiple caves within a single hydrological cave system are considered separate element occurrences when hydrological connections have not been determined or When separated by a distance of at least one km. Separation Justification: Habitat for these creatures Is primarily separated according to each species' burrowing ability. All crayfish are able to burrow to some extent and this ability will help determine the range of habitats in which a species can be found. Burrowing In the Astacldae is limited to streambed and bank excavation (Hobbs, 1988). The Cambaridae, as a whole are much more adept al burrowing than the Astacldae. As a result, they possess a greater habitat range than the Astacidae Including dry water bodies (Hogger, 1988). The burrowers can be classified into three categories: primary burrowers, secondary burrowers, and tertiary burrowers. Primary burrowers tend to remain in their burrows continuously and live in areas without permanent water except during breeding when th~y must migrate to a nearby water source (Hogger, 1988). The prairies
Load more

Recommended publications
  • Endangered Species Act 2018
    ▪ Requires regulators to consider potential effects on T&E species during permitting process ▪ Must evaluate whether they are present ▪ If present, will there be any effects? ▪ Each plant or animal type has particular set of rules about when protective measures need to be placed in permit ▪ Terrestrial species typically only require protections when present within footprint of activity or within a buffer zone of habitat features (roost trees, hibernacula, etc.) ▪ Aquatic species require protections if project is within a certain distance upstream and/or if the project disturbs an upstream drainage area greater than a given size Species Scientific Name Eastern cougar Felis concolor cougar* Indiana bat Myotis sodalis Virginia big-eared bat Corynorhinus townsendii virginianus Northern long-eared bat Myotis septentrionalis Cheat Mountain salamander Plethodon nettingi Diamond darter Crystallaria cincotta Madison Cave isopod Antrolana lira Species Scientific Name Clubshell mussel Pleurobema clava Fanshell mussel Cyprogenia stegaria James spiny mussel Pleurobema collina Pink mucket mussel Lampsilis abrupta Rayed bean mussel Villosa fabalis Sheepnose mussel Plethobasus cyphyus Spectaclecase mussel Cumberlandia monodonta Species Scientific Name Snuffbox mussel Epioblasma triquetra Tubercled blossom pearly mussel Epioblasma torulosa torulosa Guyandotte River crayfish Cambarus veteranus Big Sandy crayfish Canbarus callainus Flat-spired three toothed land snail Triodopsis platysayoides Harperella Ptilimnium nodosum Northeastern bulrush Scirpus ancistrochaetus
    [Show full text]
  • Common Name: COOSAWATTEE CRAYFISH Scientific Name: Cambarus (Hiaticambarus) Coosawattae Hobbs Other Commonly Used Names: None P
    Common Name: COOSAWATTEE CRAYFISH Scientific Name: Cambarus (Hiaticambarus) coosawattae Hobbs Other Commonly Used Names: none Previously Used Scientific Names: none Family: Cambaridae Rarity Ranks: G1/S1 State Legal Status: Endangered Federal Legal Status: none Description: The base color of the Coosawattee crayfish is brownish to olive with a reddish or burgundy coloration on the posterior portion of the carapace and the posterior edge of each abdominal segment. Margins of the rostrum and postorbital ridges are orange to reddish. The claws can be quite large in relation to the body and there is a gap between the fingers of the claw when the claw is closed. There is usually a tuft of setae at the base of the fixed finger of the claw and a single row of flattened tubercles along the mesial margin of the palm. The rostrum tapers anteriorly and appears “pinched” near the middle. The areola is broad with sides that are nearly parallel. Cervical spines are absent. This species reaches a maximum total body length of about 75 mm (3 inches). Similar Species: The Coosawattee crayfish may be found with the similar appearing beautiful crayfish (Cambarus speciosus). The Coosawattee crayfish differs from the latter by the lack of cervical spines and a rostrum that appears pinched in the middle compared to the nearly parallel- sided rostrum of the beautiful crayfish Habitat: Adults are typically found under rocks in relatively fast currents within streams. Juveniles may be found in leaves or woody debris in slower moving water. Diet: No studies of the Coosawattee crayfish are known. Crayfishes are considered opportunistic omnivores and are likely to feed on live and decaying vegetation, aquatic insect larvae, small fishes, and dead animal matter.
    [Show full text]
  • Stream-Temperature Characteristics in Georgia
    STREAM-TEMPERATURE CHARACTERISTICS IN GEORGIA By T.R. Dyar and S.J. Alhadeff ______________________________________________________________________________ U.S. GEOLOGICAL SURVEY Water-Resources Investigations Report 96-4203 Prepared in cooperation with GEORGIA DEPARTMENT OF NATURAL RESOURCES ENVIRONMENTAL PROTECTION DIVISION Atlanta, Georgia 1997 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY Charles G. Groat, Director For additional information write to: Copies of this report can be purchased from: District Chief U.S. Geological Survey U.S. Geological Survey Branch of Information Services 3039 Amwiler Road, Suite 130 Denver Federal Center Peachtree Business Center Box 25286 Atlanta, GA 30360-2824 Denver, CO 80225-0286 CONTENTS Page Abstract . 1 Introduction . 1 Purpose and scope . 2 Previous investigations. 2 Station-identification system . 3 Stream-temperature data . 3 Long-term stream-temperature characteristics. 6 Natural stream-temperature characteristics . 7 Regression analysis . 7 Harmonic mean coefficient . 7 Amplitude coefficient. 10 Phase coefficient . 13 Statewide harmonic equation . 13 Examples of estimating natural stream-temperature characteristics . 15 Panther Creek . 15 West Armuchee Creek . 15 Alcovy River . 18 Altamaha River . 18 Summary of stream-temperature characteristics by river basin . 19 Savannah River basin . 19 Ogeechee River basin. 25 Altamaha River basin. 25 Satilla-St Marys River basins. 26 Suwannee-Ochlockonee River basins . 27 Chattahoochee River basin. 27 Flint River basin. 28 Coosa River basin. 29 Tennessee River basin . 31 Selected references. 31 Tabular data . 33 Graphs showing harmonic stream-temperature curves of observed data and statewide harmonic equation for selected stations, figures 14-211 . 51 iii ILLUSTRATIONS Page Figure 1. Map showing locations of 198 periodic and 22 daily stream-temperature stations, major river basins, and physiographic provinces in Georgia.
    [Show full text]
  • FINAL REPORT Distribution and Habitat of the Tennessee
    0 FINAL REPORT Distribution and Habitat of the Tennessee Bottlebrush Crayfish, Barbicambarus simmonsi ILLINOIS NATURAL HISTORY SURVEY PRAIRIE RESEARCH INSTITUTE UNIVERSITY OF ILLINOIS AT URBANA CHAMPAIGN 1816 S. OAK CHAMPAIGN, IL 61820 INHS TECHNICAL REPORT 2014(19) BY Andrew J. Stites Illinois Natural History Survey 1816 S. Oak Champaign, IL 61820 Christopher A. Taylor, Ph. D. Illinois Natural History Survey 1816 S. Oak Champaign, IL 61820 PREPARED FOR: Tennessee Department of Environment and Conservation William R. Snodgrass Tennessee Tower 312 Rosa L. Parks Ave Nashville, TN 37243 20 July 2014 1 Introduction Crayfish are large aquatic invertebrates that have significant affects upon aquatic ecosystems and often comprise a large portion of an aquatic systems biomass (Taylor and Soucek 2010). Crayfish are good indicators of ecosystem health because they serve vital roles within aquatic systems, such as that of a primary consumer breaking down plants, woody debris and detritus into fine particulate organic matter (Parkyn and others 2001). In addition, crayfish can function as scavengers and predators of fish and invertebrates (Momot 1995; Taylor and Soucek 2010; Thomas and Taylor 2013). Finally, crayfish also have the capability to significantly alter their habitats via vegetation reduction and substrate disturbance (Momot 1995). The genus Barbicambarus was comprised of one known species, B. cornutus, until 2010 when B. simmonsi (Fig. 1) was described (Taylor and Schuster 2010). The crayfish in this genus are characterized by having densely setose antennae, a larger than average body size, and a strongly dorsoventrally flattened carapace (Taylor and Schuster 2010). B. cornutus can be found within the Green River basin in Kentucky and Tennessee and occurs most commonly under large flat boulders along creek margins where there is current (Taylor and Schuster 2004).
    [Show full text]
  • New Alien Crayfish Species in Central Europe
    NEW ALIEN CRAYFISH SPECIES IN CENTRAL EUROPE Introduction pathways, life histories, and ecological impacts DISSERTATION zur Erlangung des Doktorgrades Dr. rer. nat. der Fakultät für Naturwissenschaften der Universität Ulm vorgelegt von Christoph Chucholl aus Rosenheim Ulm 2012 NEW ALIEN CRAYFISH SPECIES IN CENTRAL EUROPE Introduction pathways, life histories, and ecological impacts DISSERTATION zur Erlangung des Doktorgrades Dr. rer. nat. der Fakultät für Naturwissenschaften der Universität Ulm vorgelegt von Christoph Chucholl aus Rosenheim Ulm 2012 Amtierender Dekan: Prof. Dr. Axel Groß Erstgutachter: Prof. Dr. Manfred Ayasse Zweitgutachter: Prof. apl. Dr. Gerhard Maier Tag der Prüfung: 16.7.2012 Cover picture: Orconectes immunis male (blue color morph) (photo courtesy of Dr. H. Bellmann) Table of contents Part 1 – Summary Introduction ............................................................................................................................ 1 Invasive alien species – a global menace ....................................................................... 1 “Invasive” matters .......................................................................................................... 2 Crustaceans – successful invaders .................................................................................. 4 The case of alien crayfish in Europe .............................................................................. 5 New versus Old alien crayfish .......................................................................................
    [Show full text]
  • Wild Species 2010 the GENERAL STATUS of SPECIES in CANADA
    Wild Species 2010 THE GENERAL STATUS OF SPECIES IN CANADA Canadian Endangered Species Conservation Council National General Status Working Group This report is a product from the collaboration of all provincial and territorial governments in Canada, and of the federal government. Canadian Endangered Species Conservation Council (CESCC). 2011. Wild Species 2010: The General Status of Species in Canada. National General Status Working Group: 302 pp. Available in French under title: Espèces sauvages 2010: La situation générale des espèces au Canada. ii Abstract Wild Species 2010 is the third report of the series after 2000 and 2005. The aim of the Wild Species series is to provide an overview on which species occur in Canada, in which provinces, territories or ocean regions they occur, and what is their status. Each species assessed in this report received a rank among the following categories: Extinct (0.2), Extirpated (0.1), At Risk (1), May Be At Risk (2), Sensitive (3), Secure (4), Undetermined (5), Not Assessed (6), Exotic (7) or Accidental (8). In the 2010 report, 11 950 species were assessed. Many taxonomic groups that were first assessed in the previous Wild Species reports were reassessed, such as vascular plants, freshwater mussels, odonates, butterflies, crayfishes, amphibians, reptiles, birds and mammals. Other taxonomic groups are assessed for the first time in the Wild Species 2010 report, namely lichens, mosses, spiders, predaceous diving beetles, ground beetles (including the reassessment of tiger beetles), lady beetles, bumblebees, black flies, horse flies, mosquitoes, and some selected macromoths. The overall results of this report show that the majority of Canada’s wild species are ranked Secure.
    [Show full text]
  • Chemical Character of Surface Waters of Georgia
    SliEU' :\0..... / ........ RO O ~ l NO. ···- ··-<~ ......... U )'On no l~er need this publication write to the Geological Sur»ey in Washlndon for ali official maillne label to use In returning it UNITED STATES DEPARTMENT OF THE INTERIOR CHEMICAL CHARACTER OF SURFACE WATERS OF GEORGIA Prepared In cooperation wilh the DIVISION OF MINES, MINING, AND GEOLOGY OF 'l'HE GEORGIA DEPARTMENT OF NATURAL RESOURCES GEOLOGICAL SURVEY WATER-SUPPLY PAPER 889- E ' UNITED STATES DEPARTMENT OF THE INTERIOR Harold L. Ickes, Secretary GEOLOGICAL SURVEY W. E. Wrather, Director Water-Supply Paper 889-E CHEMICAL CHARACTER OF SURFACE WATERS OF GEORGIA BY WILLIAM L. LAMAR Prepared in cooperation with the DIVISION OF MINES, MINING, AND GEOLOGY OF THE GEORGIA DEPARTMENT OF NATURAL RESOURCES Contributions to the Hydrology of the United States, 19~1-!3 (Pages 317- 380) UN ITED STATES GOVEHNMENT PRINTING OFFICE WASHINGTON : 1944 For sct le Ly Ll w S upcrinkntlent of Doc uments, U. S. Gover nme nt Printing Office, " ' asbingtou 25, D . C. Price 15 ce nl~ CONTENTS Page- Abstract ___________________________________________ -----_--------- 31 T Introduction __________________ c ________________________________ -- _ 317 Physiography_____________________________________________________ 318 Climate__________________________________________________________ 820 Collection and examination of samples_______________________________ 323 Stream flow __________________________ --------- ___________ c ________ . 324 Rainfall and discharge during sampling years_____________________
    [Show full text]
  • Wild About Learning
    WILD ABOUT LEARNING An Interdisciplinary Unit Fostering Discovery Learning Written on a 4th grade reading level, Wild Discoveries: Wacky New Animals, is perfect for every kid who loves wacky animals! With engaging full-color photos throughout, the book draws readers right into the animal action! Wild Discoveries features newly discovered species from around the world--such as the Shocking Pink Dragon and the Green Bomber. These wacky species are organized by region with fun facts about each one's amazing abilities and traits. The book concludes with a special section featuring new species discovered by kids! Heather L. Montgomery writes about science and nature for kids. Her subject matter ranges from snake tongues to snail poop. Heather is an award-winning teacher who uses yuck appeal to engage young minds. During a typical school visit, petrified parts and tree guts inspire reluctant writers and encourage scientific thinking. Heather has a B.S. in Biology and a M.S. in Environmental Education. When she is not writing, you can find her painting her face with mud at the McDowell Environmental Center where she is the Education Coordinator. Heather resides on the Tennessee/Alabama border. Learn more about her ten books at www.HeatherLMontgomery.com. Dear Teachers, Photo by Sonya Sones As I wrote Wild Discoveries: Wacky New Animals, I was astounded by how much I learned. As expected, I learned amazing facts about animals and the process of scientifically describing new species, but my knowledge also grew in subjects such as geography, math and language arts. I have developed this unit to share that learning growth with children.
    [Show full text]
  • Crayfishes and Shrimps) of Arkansas with a Discussion of Their Ah Bitats Raymond W
    Journal of the Arkansas Academy of Science Volume 34 Article 9 1980 Inventory of the Decapod Crustaceans (Crayfishes and Shrimps) of Arkansas with a Discussion of Their aH bitats Raymond W. Bouchard Southern Arkansas University Henry W. Robison Southern Arkansas University Follow this and additional works at: http://scholarworks.uark.edu/jaas Part of the Terrestrial and Aquatic Ecology Commons Recommended Citation Bouchard, Raymond W. and Robison, Henry W. (1980) "Inventory of the Decapod Crustaceans (Crayfishes and Shrimps) of Arkansas with a Discussion of Their aH bitats," Journal of the Arkansas Academy of Science: Vol. 34 , Article 9. Available at: http://scholarworks.uark.edu/jaas/vol34/iss1/9 This article is available for use under the Creative Commons license: Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0). Users are able to read, download, copy, print, distribute, search, link to the full texts of these articles, or use them for any other lawful purpose, without asking prior permission from the publisher or the author. This Article is brought to you for free and open access by ScholarWorks@UARK. It has been accepted for inclusion in Journal of the Arkansas Academy of Science by an authorized editor of ScholarWorks@UARK. For more information, please contact [email protected], [email protected]. Journal of the Arkansas Academy of Science, Vol. 34 [1980], Art. 9 AN INVENTORY OF THE DECAPOD CRUSTACEANS (CRAYFISHES AND SHRIMPS) OF ARKANSAS WITH A DISCUSSION OF THEIR HABITATS i RAYMOND W. BOUCHARD 7500 Seaview Avenue, Wildwood Crest, New Jersey 08260 HENRY W. ROBISON Department of Biological Sciences Southern Arkansas University, Magnolia, Arkansas 71753 ABSTRACT The freshwater decapod crustaceans of Arkansas presently consist of two species of shrimps and 51 taxa of crayfishes divided into 47 species and four subspecies.
    [Show full text]
  • Circadian Clocks in Crustaceans: Identified Neuronal and Cellular Systems
    Circadian clocks in crustaceans: identified neuronal and cellular systems Johannes Strauss, Heinrich Dircksen Department of Zoology, Stockholm University, Svante Arrhenius vag 18A, S-10691 Stockholm, Sweden TABLE OF CONTENTS 1. Abstract 2. Introduction: crustacean circadian biology 2.1. Rhythms and circadian phenomena 2.2. Chronobiological systems in Crustacea 2.3. Pacemakers in crustacean circadian systems 3. The cellular basis of crustacean circadian rhythms 3.1. The retina of the eye 3.1.1. Eye pigment migration and its adaptive role 3.1.2. Receptor potential changes of retinular cells in the electroretinogram (ERG) 3.2. Eyestalk systems and mediators of circadian rhythmicity 3.2.1. Red pigment concentrating hormone (RPCH) 3.2.2. Crustacean hyperglycaemic hormone (CHH) 3.2.3. Pigment-dispersing hormone (PDH) 3.2.4. Serotonin 3.2.5. Melatonin 3.2.6. Further factors with possible effects on circadian rhythmicity 3.3. The caudal photoreceptor of the crayfish terminal abdominal ganglion (CPR) 3.4. Extraretinal brain photoreceptors 3.5. Integration of distributed circadian clock systems and rhythms 4. Comparative aspects of crustacean clocks 4.1. Evolution of circadian pacemakers in arthropods 4.2. Putative clock neurons conserved in crustaceans and insects 4.3. Clock genes in crustaceans 4.3.1. Current knowledge about insect clock genes 4.3.2. Crustacean clock-gene 4.3.3. Crustacean period-gene 4.3.4. Crustacean cryptochrome-gene 5. Perspective 6. Acknowledgements 7. References 1. ABSTRACT Circadian rhythms are known for locomotory and reproductive behaviours, and the functioning of sensory organs, nervous structures, metabolism and developmental processes. The mechanisms and cellular bases of control are mainly inferred from circadian phenomenologies, ablation experiments and pharmacological approaches.
    [Show full text]
  • An Econometric Approach to Applied Microeconomic Theories: the Case of Natural Resource-Based Industries
    An Econometric Approach to Applied Microeconomic Theories: The Case of Natural Resource-Based Industries by Hakan Uslu A dissertation submitted to the Graduate Faculty of Auburn University in partial fulfillment of the requirements for the Degree of Doctor of Philosophy Auburn, Alabama May 7, 2016 Keywords: Economic well-being, Demand, Cost Copyright 2016 by Hakan Uslu Approved by Larry Teeter, Professor, School of Forestry and Wildlife Sciences Conner Bailey, Professor, Department of Agricultural Economics and Rural Sociology Duha Altindag, Assistant Professor, Department of Economics Yaoqi Zhang, Professor, School of Forestry and Wildlife Sciences Abstract The forest products industry of Alabama has a dominant role in the state’s economy. The industry has experienced a general downturn in production, employment and number of operating establishments since the mid-1990s. In this study, the possible determinants of the decline in the forest products industry of Alabama are discussed. Moreover, economic impact analyses are used to investigate how the contribution of the industry to the economy of Alabama has changed since the mid-1990s. Additionally, econometric analyses are employed to estimate the relationship between the decline in the industry and changes in the factors behind the decline. Furthermore, additional econometric analyses are employed to estimate the relationship between economic well-being and forest sector dependence in the counties of Alabama. Results showed that the forest products industry of Alabama has lost many employees, production, mills, and contribution to the economy of the state between 1996 and 2012. There is statistically significant relationship between increases in cost of production and decreases in demand for the forest products and the downturn in the industry.
    [Show full text]
  • Decapoda: Cambaridae) of Arkansas Henry W
    Journal of the Arkansas Academy of Science Volume 71 Article 9 2017 An Annotated Checklist of the Crayfishes (Decapoda: Cambaridae) of Arkansas Henry W. Robison Retired, [email protected] Keith A. Crandall George Washington University, [email protected] Chris T. McAllister Eastern Oklahoma State College, [email protected] Follow this and additional works at: http://scholarworks.uark.edu/jaas Part of the Biology Commons, and the Terrestrial and Aquatic Ecology Commons Recommended Citation Robison, Henry W.; Crandall, Keith A.; and McAllister, Chris T. (2017) "An Annotated Checklist of the Crayfishes (Decapoda: Cambaridae) of Arkansas," Journal of the Arkansas Academy of Science: Vol. 71 , Article 9. Available at: http://scholarworks.uark.edu/jaas/vol71/iss1/9 This article is available for use under the Creative Commons license: Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0). Users are able to read, download, copy, print, distribute, search, link to the full texts of these articles, or use them for any other lawful purpose, without asking prior permission from the publisher or the author. This Article is brought to you for free and open access by ScholarWorks@UARK. It has been accepted for inclusion in Journal of the Arkansas Academy of Science by an authorized editor of ScholarWorks@UARK. For more information, please contact [email protected], [email protected]. An Annotated Checklist of the Crayfishes (Decapoda: Cambaridae) of Arkansas Cover Page Footnote Our deepest thanks go to HWR’s numerous former SAU students who traveled with him in search of crayfishes on many fieldtrips throughout Arkansas from 1971 to 2008. Personnel especially integral to this study were C.
    [Show full text]