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Dissertations / Theses on the topic 'Crayfis'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Gladman, Zara F. "Crayfish in Scotland." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3977/.

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Unlike the rest of Britain, Scotland has no native crayfish species. There are, however, two introduced species: the white-clawed crayfish (Austropotamobius pallipes) has inhabited Loch Croispol in Sutherland and Whitemoss Reservoir in Renfrewshire for several decades. A. pallipes is endangered in its native range and Scottish stocks may constitute an important conservation resource in the future. The other crayfish species in Scotland, the North American signal crayfish (Pacifastacus leniusculus) was first recorded in the wild in 1995 and has spread rapidly to inhabit many river catchments an

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2

Beatty, Stephen John. "Translocations of freshwater crayfish : contributions from life histories, trophic relations and diseases of three species in Western Australia /." Access via Murdoch University Digital Theses project, 2005. https://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20050718.152608.

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3

Studer, Thomas. "Smelling out the competition: Response behavior of naive crayfish to novel crayfish odors." Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1401464496.

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4

Wong, Frank Yet Kheong. "Study of non-halophilic Vibrio in Australian freshwater crayfish farms : distribution, epidemiology and virulence /." [St. Lucia, Qld. : s.n.], 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16642.pdf.

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5

Herleth-King, Shawna S. "Habitat use of two crayfishes, Orconectes meeki meeki and Orconectes williamsi, in a small Missouri Ozark stream a thesis presented to the faculty of the Graduate School, Tennessee Technological University /." Click to access online, 2009. http://proquest.umi.com/pqdweb?index=25&did=1908035801&SrchMode=1&sid=1&Fmt=6&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1264711002&clientId=28564.

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6

Allen, Sarah Kathryn. "Flow Cytometric Analysis of Crayfish Hemocytes." Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etd/1309.

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Crayfish exhibit innate immune responses via hemocytes and their products. There are 3 hemocyte populations: hyaline cells, granular cells, and semigranular cells. Hemocytes from laboratory housed, untreated crayfish (normal crayfish) have been quantified on the basis of cell type, cell size, and cell granularity using Flow Cytometry. These data present the first overall picture of normal hemocytes from Red Swamp Crayfish with regard to cell type, cell size, and cell granularity and will serve as a baseline for all future studies in our lab. Experiments using crayfish injected with Pseudomonas

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7

Harlioğlu, Muzaffer Mustafa. "Comparative biology of the signal crayfish, Pacifastacus leniusculus (Dana), and the narrow-clawed crayfish, Astacus leptodactylus Eschscholtz." Thesis, University of Nottingham, 1996. http://eprints.nottingham.ac.uk/13339/.

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Some aspects of the biology of Pacifastacus leniusculus and Astacus leptodactylus have been compared. The literature survey shows that considerably more studies have been carried out on P. leniusculus than A. leptodactylus. Although no major differences have been found in the morphology of appendages and mouthparts of the species, structural differences have been found in the abundance of setae on the second maxilliped, in the number of teeth on the mandibles and the crista dentata, and form of the chelipeds. Studies on the environmental tolerance of the species show that both species are able

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8

Bubb, Damian H. "Spatial ecology of white-clawed crayfish Austropotamobius pallipes and signal crayfish Pacifastacus leniusculus in upland rivers, northern England." Thesis, Durham University, 2004. http://etheses.dur.ac.uk/3118/.

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The American signal crayfish Pacifastacus lernusculus, an invasive species widely introduced throughout Europe, is a major threat to native European crayfish species and is causing increasing concern because of its wide impact on aquatic ecosystems. This thesis investigates the within catchment expansion of signal crayfish populations in two upland rivers and the spatial ecology and movement of the introduced signal crayfish and the indigenous white-clawed crayfish Austropotamobius pallipes. Populations of signal crayfish are established and expanding on the upland rivers Wharfe and Ure. On th

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9

Boštjančić, Ljudevit Luka. "Through the maze of immunity : molecular characterisation of the freshwater crayfish immune response to the crayfish plague pathogen." Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAJ080.

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Les écrevisses d'eau douce sont un ancien groupe de crustacés décapodes. Ce sont des espèces clés des habitats d'eau douce qui jouent le rôle d'ingénieurs de l'écosystème, de régulateurs trophiques et d'indicateurs de la biodiversité. Au début du 20ème siècle, un effondrement des populations d'écrevisses européennes autochtones s'est produit en raison de l'introduction de l'oomycète pathogène invasif Aphanomyces astaci Schikora (1906), agent responsable de la peste des écrevisses. Par la suite, les introductions répétées d'espèces d'écrevisses d'eau douce invasives, infectées de manière latent

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10

Belanger, Rachelle Marie. "An Interdisciplinary Investigation of the Role of Crayfish Major Chelae in the Discrimination of Conspecific Odours: from Morphology to Behaviour." Bowling Green, Ohio : Bowling Green State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1182174766.

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11

Dawkins, Kathryn L. "A Study on Tenuibranchiurus and the Evolution of the Burrowing Clade of Australian Freshwater Crayfish." Thesis, Griffith University, 2015. http://hdl.handle.net/10072/367987.

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The overall aim of this thesis was to investigate the morphological and molecular diversity within Tenuibranchiurus, and to utilise these data to further the understanding of the evolution of this freshwater crayfish and the other genera of the Australian burrowing clade from both a phylogenetic and biogeographic perspective. The genus Tenuibranchiurus occurs within coastal eastern Australia and currently represents the largest gap in knowledge within this clade of crayfish. It is also the only monotypic parastacid genus, containing the single species T. glypticus. Additionally, it has morph

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12

Berry, Fiona Catherine. "The behavioural function of pheromones in crayfish." Thesis, University of Hull, 2008. http://hydra.hull.ac.uk/resources/hull:5756.

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Pacifastacus leniusculus and Procambarus clarkii are highly invasive freshwater crayfish and are having detrimental impacts on native species and habitats throughout Europe. The application of pheromone baits have been proposed as a way of increasing trap efficiency for population control, however the chemical identity of crayfish pheromones is unknown. An incomplete understanding of chemical communication has delayed progress in the development of appropriate bioassays. This thesis therefore focused on researching the natural context of chemical signalling by crayfish, including signal delive

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13

Luan, Xin. "Interspecies aggression and social dominance in crayfish." Bowling Green, Ohio : Bowling Green State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1256151469.

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14

Breinholt, Jesse W. "Testing Crayfish Evolutionary Hypotheses with Phylogenetic Methods." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3563.

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This dissertation focuses on increasing the understanding of the evolution processes that have contributed to the diversification of freshwater crayfish. Chapter one estimates the divergence time of the three crayfish families and tests the hypothesis that diversification is tied to the break-up of Pangaea, Gondwanna, and Laurasia. I find that the families of crayfish diverged prior to or in association with the break-up of the three super continents. Chapter two addresses the evolutionary history of the genus Cambarus, using molecular data to test hypotheses of relationships based on chela an

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15

au, S. Beatty@murdoch edu, and Stephen Beatty. "Translocations of freshwater crayfish: contributions from life histories, trophic relations and diseases of three species in Western Australia." Murdoch University, 2005. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20050718.152608.

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By examining Western Australian freshwater crayfishes, this thesis aims to further our understanding of how life-history strategies, trophic relationships and disease introductions contribute to the threats posed by introduced species. Reproductive and population biology of two species of freshwater crayfish endemic to Western Australia (the marron Cherax cainii and gilgie Cherax quinquecarinatus) and the introduced yabbie Cherax destructor were described. Multiple stable isotope analysis was employed to determine the trophic positions of sympatric populations of C. cainii and the invading.

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16

Simon, Jodie L. "Male-Female Communication in the Crayfish Orconectes Rusticus: The Use of Urinary Signals in Reproductive and Non-Reproductive Pairings." Connect to this title online, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1148415041.

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17

Welch, Shane Matthew. "Multiscale habitat associations of three primary burrowing crayfish." Connect to this title online, 2006. http://etd.lib.clemson.edu/documents/1175184962/.

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18

Bierbower, Sonya M. "ENVIRONMENTAL EFFECTS ON BEHAVIOR AND PHYSIOLOGY IN CRAYFISH." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_diss/778.

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Despite dramatic morphological differences between animals from different taxa, several important features in organization and sensory system processing are similar across animals. Because of this similarity, a number of different organisms including mammals, insects, and decapod crustaceans serve as valuable model systems for understanding general principles of environmental effects. This research examines intrinsic and extrinsic factors by behaviorally and physiologically means to identify the impact of environmental conditions on two distinct crayfish species- Procambarus clarkii (surface)

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19

Firkins, Ian. "Environmental tolerances of three species of freshwater crayfish." Thesis, University of Nottingham, 1993. http://eprints.nottingham.ac.uk/11282/.

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The only species of crayfish native to the British Isles, i.e. Austropotamobius pallipes, is presently widely distributed throughout much of England, Wales and Ireland. The main controlling factor behind this distribution is the predominantly "bicarbonate" freshwater system of the British Isles. In geological terms, native crayfish are generally found in areas of chalk, carboniferous or magnesium limestone, or drift deposits of boulder clay. More recently, native crayfish have been affected by a general decline in the quality of Britain's freshwater system largely due to sewage effluent and ag

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20

Guan, Ruizhang. "Ecological studies on the crayfish Pacifastacus leniusculus (Dana)." Thesis, University of Buckingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282636.

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21

James, Joanna. "The impact of invasive crayfish on aquatic ecosystems." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/89031/.

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Crayfish are keystone species and ecosystem engineers that affect the structure and function of aquatic ecosystems. Whilst ecological impacts are caused by crayfish in their native range, non - native crayfish species typically have a greater ef fect on some other aquatic organisms and ecosystem processes (Chapter 2). Crayfish are extremely successful invaders that often cause declines in native cra yfish (Chapter 3). Of the 7 non - native crayfish species in the UK, the signal crayfish ( Pacifastacus leniusculus ) is currently the most widespread (Chapter 3). Field and laboratory data, howeve

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22

Peay, Stephanie. "Developing tools for the management of freshwater crayfish." Thesis, University of Leeds, 2013. http://etheses.whiterose.ac.uk/6343/.

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The introduction of non-indigenous crayfish into Europe is causing the loss of indigenous crayfish, due to transmission of crayfish plague and competition. Other factors are reductions of habitat quality and in some areas harvesting. This study deals with issues facing environmental agencies and other resource managers about how manage crayfish; from prevention of further introductions, to eradication where feasible, or control if it is cost-effective, or where it is not, then applying measures to mitigate the effects of invasion by finding or establishing isolated areas for indigenous crayfis

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23

Filipová, Lenka. "Genetic variation in North American crayfish species introduced to Europe and the prevalence of the crayfish plague pathogen in their population." Poitiers, 2012. http://theses.univ-poitiers.fr/25202/2012-Filipova-Lenka-These.pdf.

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Les invasions biologiques de crustacés représentent une sérieuse menace pour les espèces natives d'Europe. Ma thèse porte sur les écrevisses non-indigènes introduites en Europe et sur leur parasite Aphanomyces astaci, le pathogène de la peste de l'écrevisse. Les chapitres I-V portent sur la diversité génétique des écrevisses d'Amérique du Nord. Nous avons montré que chez deux espèces avérées invasives, la variabilité génétique varie significativement. Orconectes limosus a été introduite en Europe probablement en une seule fois, avec peu d'individus. La variabilité de l'ADN mitochondrial en Eur

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24

Wolf, Mary Caroline. "Neural and behavioral responses to complex stimuli using crayfish as a model system." Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1130864221.

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25

Skorupski, P. "Central nervous and proprioceptive control of crayfish walking leg motoneurones : An intracellular microelectrode study of the isolated 4. thoracic ganglion." Thesis, University of Bristol, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354467.

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26

Clark, Jennifer M. "Abiotic and biotic factors affecting size-dependent crayfish (Orconectes obscurus) distribution, density, and survival." [Kent, Ohio] : Kent State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=kent1239497384.

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Thesis (Ph.D.)--Kent State University, 2009.<br>Title from PDF t.p. (viewed Nov. 16, 2009). Advisor: Mark Kershner. Keywords: crayfish; stream; predation; current velocity; water depth; grain size; resource competition. Includes bibliographical references.

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27

Channell, Katherine B. "Implementation of a spatial-temporal focus to predict habitat locations and distribution of Cambarus veteranus." Huntington, WV : [Marshall University Libraries], 2004. http://www.marshall.edu/etd/descript.asp?ref=394.

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Thesis (M.S.)--Marshall University, 2004.<br>Title from document title page. Document formatted into pages; contains ix, 88 p. including illustrations. Includes abstract. Includes bibliographical references (p. 72-76).

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28

Dillman, Casey B. "Phylogenetic systematics of Orconectes stygocaneyi, with a genealogical analysis of the Ozark cave crayfishes /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1421131.

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29

Buhay, Jennifer E. "Phylogeographic analyses of obligate and facultative cave crayfish species on the Cumberland Plateau of the Southern Appalachians /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1415.pdf.

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30

Northcutt, Brian S. W. "Effects of External Electric Fields on Light Transmittance in Isolated Crayfish Nerves." Thesis, University of North Texas, 1995. https://digital.library.unt.edu/ark:/67531/metadc279205/.

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Acute effects of a pulsed external electric field (PEEF) at 20 V/cm and a d.c. EEF at 90 V/cm on light transmittance in an isolated compound crayfish nerve was measured. In a third series, the nerve was pre-treated with the Na+ channel blocker tetrodotoxin (TTX). A PEEF produced an irreversible increase in the variation of light transmittance in normal nerves but a reversible increase in TTX treated nerves. This data was statistically insignificant. The d.c. EEFs produced a reversible and statistically significant enhancement of variation in light transmittance in both untreated and TTX-treat

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31

Jiravanichpaisal, Pikul. "White Spot Syndrome Virus Interaction with a Freshwater Crayfish." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5776.

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32

Middleton, Dawn. "Comparative aspects of the immunobiology of freshwater crayfish species." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283632.

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33

Hayes, Richard Birchall. "Consequences for lotic ecosystems of invasion by signal crayfish." Thesis, Queen Mary, University of London, 2012. http://qmro.qmul.ac.uk/xmlui/handle/123456789/2484.

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Non-native invasive species are major drivers of biodiversity loss and ecosystemlevel modification. The signal crayfish (Pacifastacus leniusculus) is a highly successful invasive species and demonstrates traits often seen in keystone species, including top-down predatory effects, a high degree of omnivory, and an ability to physically modify its habitat. From field surveys, and in situ and artificial channel experiments, I show that signal crayfish have direct and indirect impacts on the benthos, as well as ecosystem process rates, in lowland, chalk stream ecosystems. Furthermore, I show that

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34

Tambo, Guillermo Eduardo Willis-Jones. "The indirect impacts of ecosystem engineering by invasive crayfish." Thesis, Queen Mary, University of London, 2018. http://qmro.qmul.ac.uk/xmlui/handle/123456789/46825.

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Bioturbation by invasive crayfish can significantly alter sediment properties and its transport in invaded water bodies; however, the indirect impacts of this on ecosystem functioning are poorly understood. In this thesis I present data from mesocosm and field manipulation experiments used to assess the effect of bioturbation by three widely distributed invasive crayfish species (Procambarus clarkii, Pacifastacus leniusculus and Astacus leptodactylus) on a variety of ecosystem properties across seasons. In the mesocosm experiments, P. clarkii caused significantly more bioturbation than the oth

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35

Bhimani, Rohan. "Operant Place Aversion in the Rusty Crayfish, Orconectes rusticus." Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1415978513.

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36

Mueller, Karl W. "Shelter competition between native signal crayfish and non-native red swamp crayfish in Pine Lake, Sammamish, Washington : the role of size and sex /." Online version, 2007. http://content.wwu.edu/cdm4/document.php?CISOROOT=/hcc&CISOPTR=2490&REC=15.

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37

Warren, Amy H. "Male dominance and sexual selection in the crayfish Orconectes Quinebaugensis." Worcester, Mass. : Worcester Polytechnic Institute, 2009. http://www.wpi.edu/Pubs/ETD/Available/etd-043009-140131/.

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38

Williams, Kristi. "Macroinvertebrate and crayfish communities in the Meramec River drainage basin an investigation at multiple spatial scales /." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4580.

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Thesis (M.S.) University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (June 27, 2007) Includes bibliographical references.

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39

Ashley, Claire M. "Toxicology of dioxin in an invertebrate, Pacifastacus leniusculus (Dana)." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283656.

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40

Bell, Spencer Sullivan. "Mountain Lake Revisited: Impacts of Invasion on Native Symbiotic Systems." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/96193.

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Organismal invasions have repeatedly been cited as both a driving force behind global change and beneficiaries of that change. Although many drivers of these invasions have been well studied, few studies have addressed invasions through the perspective of native symbiont communities. In the Mountain Lake region of Virginia, crayfish host diverse assemblages of obligate cleaning symbionts known as branchiobdellida. This cleaning symbiosis has been found to result in significant fitness benefits for native crayfish. Historical survey work showed that invasive crayfish, known to be intolerant

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41

Fero, Kandice Christine. "Social dominance a behavioral mechanism for resource allocation in crayfish /." Bowling Green, Ohio : Bowling Green State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1213213435.

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42

Noonin, Chadanat. "Melanization and Hemocyte Homeostasis in the Freshwater Crayfish, Pacifastacus leniusculus." Doctoral thesis, Uppsala universitet, Jämförande fysiologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-209209.

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Blood cells or hemocytes play important roles in immunity. They are a major source of many immune-related molecules such as antibodies in adaptive immunity of vertebrates and prophenoloxidase (proPO) in invertebrates. In the crayfish Pacifastacus leniusculus, the proPO-system has been reported to be an important component of immune responses against microorganisms. In this study, several mutant strains of Aeromonas hydrophila were used to reveal that LPS (lipopolysaccharide) is an important factor for the pathogenicity of A. hydrophila, strongly inducing the proPO system and melanization. This

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Jones, Julia Patricia Gordon. "The sustainability of crayfish harvesting in Ranomafana National Park, Madagascar." Thesis, University of Cambridge, 2004. https://www.repository.cam.ac.uk/handle/1810/284387.

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Madagascar's freshwater crayfish, belonging to the endemic genus Astacoides, are harvested throughout their range in the eastern highlands of the country. They provide an important source of protein and revenue to local communities but there is concern that the harvest may be unsustainable. In this thesis I assess the sustainability of crayfish harvesting in and around Ranomafana National Park, an area well known for its reliance on crayfish harvesting. Six taxa (belonging to four described species) are found in the Ranomafana area. Most families in villages with access to forest carry out som

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Martin, Arthur Leo III. "Underlying Mechanisms That Affect Crayfish Agonistic Interactions and Resource Acquisition." Bowling Green State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1181230800.

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Slutzker, Juliet M. "Impacts of Road Crossings and Flow on Crayfish Population Structures." Bowling Green State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1428515728.

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46

Blake, Michael A. "Defence against predators by juvenile signal crayfish (Pacifastacus leniusculus, Dana)." Thesis, University of Leicester, 1993. http://hdl.handle.net/2381/34156.

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This study investigated the defensive responses of juvenile signal crayfish (Pacifastacus leniusculus, Dana) to two putative predators, perch (Perca fluviatilis, L.) and eel (Anguilla anguilla, L.), and attempted to determine the Importance of direct and indirect predatory effects on the distribution of newly independent Juvenile crayfish in a Swedish pond. Eels are thought to be more detrimental to crayfish populations than perch. Experiments using juvenile crayfish did not support this assertion. Visual and chemical stimuli elicited crayfish avoidance behaviour. This was most marked when bot

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Carpenter, Jeanette 1960. "Effects of introduced crayfish on selected native fishes of Arizona." Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/284145.

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The virile crayfish (Orconectes virilis), an aggressive polytrophic species, has been introduced into many Arizona streams. I investigated competition and predation between this crayfish and several native Arizona fishes. I conducted field experiments to assess competition for food between crayfish and fish, and laboratory experiments to examine competition for shelter and food, and predation. In Sabino Creek, I manipulated crayfish densities in isolated pools to examine effects of crayfish on growth, mortality, and recruitment of Gila chub (Gila intermedia). Regardless of crayfish density, Gi

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48

Fletcher, Kenneth A. "Febrile response and activity in the crayfish, Pacifasticus leniusculus trowbridgii." PDXScholar, 1988. https://pdxscholar.library.pdx.edu/open_access_etds/3809.

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Poikilothermic and endothermic animals demonstrate febrile response to infection with bacteria or to injection with endogenous pyrogen extract of Prostaglandin E1. Febrile response is measured in endotherms as a relative change in metabolically achieved body temperature and in poikilotherms as an increase in selected temperatures relative to previously established preferred temperatures. Final preferendum change with environmental factors or associated physiological states.

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Crawford, Allison Clare. "Evolution and function of cellulase genes in Australian freshwater crayfish." Thesis, Queensland University of Technology, 2006. https://eprints.qut.edu.au/16274/1/Allison_Crawford_Thesis.pdf.

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The most abundant organic compound produced by plants is cellulose, however it has long been accepted that animals do not secrete the hydrolytic enzymes required for its degradation, but rely instead on cellulases produced by symbiotic microbes. The recent discovery of an endogenous cDNA transcript encoding a putative GHF9 endoglucanase in the parastacid crayfish Cherax quadricarinatus (Byrne et al., 1999) suggests that similar cellulase genes may have been inherited by a range of crustacean taxa. In this study, the evolutionary history of the C. quadricarinatus endoglucanase gene and the pr

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Crawford, Allison Clare. "Evolution and function of cellulase genes in Australian freshwater crayfish." Queensland University of Technology, 2006. http://eprints.qut.edu.au/16274/.

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The most abundant organic compound produced by plants is cellulose, however it has long been accepted that animals do not secrete the hydrolytic enzymes required for its degradation, but rely instead on cellulases produced by symbiotic microbes. The recent discovery of an endogenous cDNA transcript encoding a putative GHF9 endoglucanase in the parastacid crayfish Cherax quadricarinatus (Byrne et al., 1999) suggests that similar cellulase genes may have been inherited by a range of crustacean taxa. In this study, the evolutionary history of the C. quadricarinatus endoglucanase gene and the pr

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