Rozprawy doktorskie na temat „Crabs”
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Houser, Letise T. "The importance of horizontal swimming behavior in maintaining patches of larval crabs". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 1.34 Mb., 156 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3200543.
Pełny tekst źródłaLai, Chi-sing. "The feeding ecology of Thalamita danae Stimpson 1858 (Brachyura:Portunidae), with a review of the genus Thalamita in Hong Kong /". Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18933464.
Pełny tekst źródłaYau, Po-ming. "Studies on the ecology, ecophysiology and ecotoxicology of three species of intertidal crabs in Hong Kong /". Hong Kong : [University of Hong Kong], 1991. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1316661X.
Pełny tekst źródłaLee, Ka-wai. "The impact of foraging by soldier crabs, Mictyris brevidactylus, on sandy shore communities". Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/HKUTO/record/B3955742X.
Pełny tekst źródłaBellwood, O. "Systematics, biogeography and functional morphology of the box crabs (Family Calappidae) /". Connect to this title online, 2002. http://eprints.jcu.edu.au/1182/.
Pełny tekst źródłaBarbour, Russell W. "Patterns of larval distribution and settlement in a river-dominated estuary /". Electronic version (PDF), 2003. http://dl.uncw.edu/etd/2003/barbourr/russellbarbour.pdf.
Pełny tekst źródłaKennedy, Patrick J. "Characterization of a gene family associated with calcified structures in the blue crab, Callinectes sapidus /". Electronic version (PDF), 2004. http://dl.uncw.edu/etd/2004/kennedyp/patrickkennedy.pdf.
Pełny tekst źródłaBuda, Elizabeth S. "Prophenoloxidase activating factor from the blue crab, Callinectes sapidus /". Electronic version (PDF), 2004. http://dl.uncw.edu/etd/2004/budae/elizabethbuda.pdf.
Pełny tekst źródłaGarrison, Lance Preston. "The influence of physical transport and nutritional stress on the zoeae of estuarine crabs". W&M ScholarWorks, 1997. http://web.vims.edu/library/Theses/Garrison97.pdf.
Pełny tekst źródłaKennish, Robin. "Seasonal patterns of algal availability, influences on diet selection and fitness of the tropical crab grapsus albolineatus". Thesis, Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17591533.
Pełny tekst źródłaConnelly, Janet Hosier. "Horseshoe Crabs-Ancient Alien Protectors". Thesis, The George Washington University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10118697.
Pełny tekst źródłaAncient Alien Protectors is an exhibition that tells the story of the wonders and benefits of horseshoe crabs. What are they and why should anyone care about them? Researching the topic revealed that more often than not an inhabitant of the Western Shore or any of the landlocked geographical locations in the United States has limited knowledge about horseshoe crabs. Their kind has inhabited our Earth for over 475 million years. They have outlasted over ninety-nine percent of all the species that ever swam or walked on the planet but are now in peril due to human activity. They have been harvested for farmers to make fertilizer for crops, chopped up as bait for fishermen, and captured and bled by biomedical companies. Their copper-based blue blood is used to produce a life-saving product that is hypersensitive to bacteria. The injectable drugs and medical devices that come in contact with our blood must be tested for the presence of toxins, horseshoe crabs have now become an invaluable commodity to modern medicine.
Horseshoe crab eggs are a food source for many crustaceans and fishes. Their eggs are an integral part of the diet of many shorebirds, allowing them to refuel and gain weight before continuing their journey northward to the Arctic. Disappearance of the horseshoe crab from the waters of the Atlantic Ocean would be a critical blow to the life-sustaining connection between members of local ecosystems.
The goal of this research is to create an exhibition that sparks an awareness about how we are an intrinsic part of the natural world. The exhibition is designed so that visitors will have an opportunity to enter a museum located in the Delaware Bay region, the natural setting where the largest population of horseshoe crabs are born, grow to maturity, and reproduce. Visitors can immerse themselves in an environment that will stimulate their senses as well as their mind and leave inspired to engage in the conservation and protection of this resilient species. The proposed site will also house a research facility collocated with the museum to foster cooperation and knowledge sharing among scientists. A partnership between the conservation and medical communities would strengthen the commitment to finding better ways to strategically manage and preserve this precious living resource.
Suchanek, Jessica. "A Cast of White Crabs". ScholarWorks@UNO, 2011. http://scholarworks.uno.edu/td/1374.
Pełny tekst źródłaJohnson, Lisa K. "Metabolic influences of fiber size in aerobic and anaerobic muscles of the blue crab, Callinectes sapidus /". Electronic version (PDF), 2004. http://dl.uncw.edu/etd/2004/johnsonl/lisajohnson.pdf.
Pełny tekst źródłaLee, Ka-wai, i 李嘉慧. "The impact of foraging by soldier crabs, Mictyris brevidactylus, on sandy shore communities". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B3955742X.
Pełny tekst źródłaKwok, Pik-wan. "The ecology of two sesarmine crabs, perisesarma bidens (de Haan) and parasesarma plicata (latreille) at the Mai Po Marshes nature reserve, Hong Kong /". Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B14778348.
Pełny tekst źródłaChurchill, Giles John. "An investigation into the captive spawning, egg characteristics and egg quality of the mud crab (Scylla serrata) in South Africa". Thesis, Rhodes University, 2004. http://hdl.handle.net/10962/d1015963.
Pełny tekst źródłaBryant, Andrew D. "The life history patterns of brachyuran crabs". Thesis, University of Liverpool, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316604.
Pełny tekst źródłaDo, Van Tu. "Freshwater crabs of Vietnam: diversity and conservation". Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-190347.
Pełny tekst źródłaKhu hệ cua nước ngọt ở Việt Nam có mức độ đa dạng và đặc hữu cao với 49 loài đã được ghi nhận, trong đó có tới 42 loài chỉ được biết đến ở Việt Nam. Ngoài ra, nhiều loài cua nước ngọt còn chưa được mô tả hay chưa được khám phá, trong khi có tới 10% trong tổng số loài đã biết đang phải đối mặt với nguy cơ tuyệt chủng. Ô nhiễm môi trường nước, đô thị hóa, phát triển công nghiệp và nông nghiệp, nơi sống bị phân mảnh và mất, phá rừng cùng với khai thác quá mức là những mối đe dọa chính đối với khu hệ này. Công tác bảo tồn trước hết phải giữ cho diện tích rừng đủ lớn để duy trì chất lượng môi trường sống cho sự tồn tại lâu dài của các loài cua này. Các nghiên cứu về phân loại học, phân bố, động lực quần thể là rất cần thiết để đánh giá tình trạng bảo tồn và đưa ra những hành động bảo tồn hiệu quả cho các loài cua nước ngọt ở Việt Nam
DeRivera, Catherine E. "Conflict over male searching in fiddler crabs /". Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1999. http://wwwlib.umi.com/cr/ucsd/fullcit?p9956458.
Pełny tekst źródłaBurch, Alexandra. "The foraging behaviour of shallow water crabs". Thesis, Bangor University, 1998. https://research.bangor.ac.uk/portal/en/theses/the-foraging-behaviour-of-shallow-water-crabs(0e293f58-80a5-466f-8d3a-90ac3c384b4c).html.
Pełny tekst źródła胡嘉麟 i Ka-lun Kelvin Wu. "Status, consumption and conservation of horseshoe crabs in Hong Kong". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41549533.
Pełny tekst źródłaWu, Ka-lun Kelvin. "Status, consumption and conservation of horseshoe crabs in Hong Kong". Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B41549533.
Pełny tekst źródłaThariyan, Sheeba K. "Size distribution and reproductive biology of the mud crab Scylla serrata at Cochin during monsoon period". Thesis, Central Marine Fisheries Research Institute, 1988. http://eprints.cmfri.org.in/11196/1/Sheeba%20K.%20Thariyan%20.pdf.
Pełny tekst źródłaZayasu, Yuna. "The cospeciation between massive corals and gall crabs". 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188516.
Pełny tekst źródłaWithers, Patrick. "Hormonal control of growth and reproduction in crabs". Thesis, Bangor University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369443.
Pełny tekst źródłaSzebeni, Tommy. "Camouflage and associated adaptations in Manx spider crabs". Thesis, University of Liverpool, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396706.
Pełny tekst źródłaWarren, Janice H. (Janice Helene). "Behavioural ecology of crabs in temperate mangrove swamps". Thesis, The University of Sydney, 1987. https://hdl.handle.net/2123/26768.
Pełny tekst źródłaChan, Hing Man. "Aspects of the biology of zinc in crabs with particular emphasis on the shore crab Carcinus maenas (L.)". Thesis, Queen Mary, University of London, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389150.
Pełny tekst źródłaYau, Po-ming, i 邱寶明. "Studies on the ecology, ecophysiology and ecotoxicology of three species of intertidal crabs in Hong Kong". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1991. http://hub.hku.hk/bib/B31232899.
Pełny tekst źródłaLai, Chi-sing, i 黎志誠. "The feeding ecology of Thalamita danae Stimpson 1858 (Brachyura:Portunidae), with a review of the genus Thalamita in Hong Kong". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31214204.
Pełny tekst źródłaau, kdsmith@fish wa gov, i Kimberley Dale Smith. "Distributions, relative abundances and reproductive biology of the deep-water crabs Hypothalassia acerba and Chaceon bicolor in southwestern Australia". Murdoch University, 2006. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20061129.142618.
Pełny tekst źródłaPercival, Scott R. "Feeding and substrate preferences of the Japanese shore crab, hemigrapsus sanguineus /". View abstract, 2002. http://library.ccsu.edu/ccsu%5Ftheses/showit.php3?id=1662.
Pełny tekst źródłaThesis advisor: Kim Wilson. " ... in partial fulfillment of the requirements for the degree of Master of Science in Biology." Includes bibliographical references (leaves 54-58). Also available via the World Wide Web.
Bell, Karen Lennox. "Studies on phagocytosis in the shore crab Carcinus maenas (Crustacea, Decapoda)". Thesis, University of St Andrews, 1994. http://hdl.handle.net/10023/14845.
Pełny tekst źródłaPhiri, Ethel Emmarantia. "Molecular phylogeny and biogeography of the Afrotropical freshwater crab fauna". Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86312.
Pełny tekst źródłaENGLISH ABSTRACT: Freshwater organisms, such as crabs (Crustacea: Decapoda: Brachyura), are useful in studies examining inland historical biogeographic patterns and speciation because they are isolated to specific drainage systems, which often serve as barriers to gene flow. The Afrotropical freshwater crab fauna (Potamonautidae) present ideal organisms for investigating hypothesis relating to evolutionary histories because they occur on continental Africa (sub-Sahara) and islands. However, there is a great deal of undiscovered freshwater crab diversity, especially with the prevalence of undiscovered cryptic lineages, which are poorly studied among freshwater crabs, leading to uncertain regional diversity. In this research, multiple genetic (mt- and nuDNA) markers were used to infer the phylogenetic relationships and the biogeographical histories of the Afrotropical freshwater crab superfamily, Potamonautidae. Divergence time estimations were used to infer biogeographic histories, to ascertain whether speciation could be linked to past geologic and / or climatic events. Two widely distributed Potamonautes species complexes were targeted for the investigation of regional cryptic species diversity. In Chapter 2, the intraspecific phylogenetic variability within Potamonautes perlatus sensu lato occurring on the Cape Fold Mountain range (South Africa) was examined, with sampling localities occurring in western- and southern flowing drainages. Previous research suggested possible cryptic speciation within this species complex; however, no tangible inferences could be made because of analytical constraints. Two major clades were recovered: one corresponding to western flowing drainages and another to southern flowing drainages. Moreover, three cryptic lineages were recovered: P. perlatus sensu stricto, restricted to western flowing drainages, and two geographically discrete novel cryptic lineages from the southern flowing drainages, described as P. barbarai sp. nov and P. barnardi sp. nov., with divergence (±2.61 Mya) linked to Pleistocene climatic events. Subsequent to the recovery of the two novel lineages from the Cape Fold Mountain range, the Pleistocene climatic events. Subsequent to the recovery of the two novel lineages from the Cape Fold Mountain range, the revision of the P. clarus / P. depressus species complex from the Tugela and uMkomazi drainages (Drakensberg Mountain range, South Africa) was conducted. This species complex was previously found to comprise at least five cryptic lineages (Chapter 3). A coalescent multilocus (three mt- and three nuDNA) Bayesian species delimitation method was used, and an additional three cryptic lineages were recovered, bringing the total to eight species (two already described as P. clarus and P. depressus), with divergence having occurred approximately 10.3 Mya. Following the recent discovery of novel freshwater crab lineages in the mountainous areas of Mozambique and Malawi, a sampling trip to the Zimbabwean Highlands was undertaken, where a novel freshwater crab species was discovered and described as P. mutareensis, highlighting the need to sample high-lying regions (Chapter 4). Furthermore, two additional novel lineages from Mozambique (P. bellarussus sp. nov.) and the Mpumalanga Province in South Africa (P. flavusjo sp. nov) were described (Chapter 5). In Chapter 6, increased taxon sampling, with additional specimens acquired from various museums and personal collections was used to obtain a better resolution of the phylogeny of the Afrotropical Potamonautidae and to infer the ancestral affinities of the two sub-families, Deckeniinae and Potamonautinae. The Potamonautidae were found to have speciated eastward from West Africa, with a late Cretaceous divergence (±107 – 96.04 Mya). The Potamonautinae originated in West Africa (three genera), while the paraphyletic Potamonautes and Platythelphusa had East African affinities. Potamonautes was not monophyletic, comprising several fragmented geographic clades, which may suggest that this genus requires revision. Nevertheless, the overall speciation within the Potamonautidae reflects past geological and climatic events, such as rifting and uplift episodes and the contraction of forests, which occurred from the Tertiary onwards.
Colavite, Jéssica. "Phylogenetic relationships and taxonomic revision of the genus Macrocoeloma Miers, 1879 (Crustacea Decapoda: Brachyura) /". Botucatu, 2020. http://hdl.handle.net/11449/192314.
Pełny tekst źródłaResumo: O gênero anfi-americano Macrocoeloma Miers, 1879 é composto por caranguejos decoradores de habitats tropicais e subtropicais. Esses caranguejos são encontrados em substratos distintos, incluindo principalmente recifes de corais e rochas. Esse gênero passou por várias alterações sistemáticas em seu status de família, desde sua descrição original até a sua recente exclusão de Mithracidae. No início deste estudo Macrocoeloma era considerado incertae sedis, devido ao pouco conhecimento das relações entre as espécies do gênero e outros gêneros relacionados, sendo sua revisão taxonômica sugerida diversas vezes na literatura. Assim, com o objetivo de suprir essas lacunas taxonômicas e filogenéticas, este estudo empregou abordagens morfológicas e moleculares para reconstruir as relações filogenéticas de Macrocoeloma. Para isso, utilizamos um conjunto de dados moleculares combinados de um gene nuclear (18S) e três mitocondriais (12S, 16S, COI), usando máxima verossimilhança e inferência bayesiana. Além disso, uma inferência de delimitação de espécies foi realizada com o modelo de Poisson tree processes (PTP), usando a filogenia de máxima verossimilhança do gene mitocondrial COI. Foi realizada a revisão taxonômica de Macrocoeloma, com diagnóstico elaborado, descrições detalhadas e mapas de distribuição geográfica com base no material examinado. A monofilia de Macrocoeloma foi demonstrada, após exclusão de Pericera heptacantha Bell, 1836 e P. septemspinosa Stimpson, 1871. O gênero monot... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The amphi-American genus, Macrocoeloma Miers, 1879, is composed of decorator crabs from tropical and subtropical regions. These crabs are found on distinct substrates, including mainly coral reefs and rock. Macrocoeloma has undergone several systematic changes in its family status, since the original description until its recent exclusion of Mithracidae. Prior to this study, Macrocoeloma was considered incertae sedis, due to little knowledge of the relationships between species of the genus and related genera, and its taxonomic revision has been suggested several times in the literature. Thus, in order to address these taxonomic and phylogenetics gaps, this study employed morphological and molecular approaches to reconstruct the phylogenetic relationships of Macrocoeloma. We used a combined molecular dataset of a nuclear (18S) and three mitochondrial genes (12S, 16S, COI) using Maximum Likelihood and Bayesian Inference. In addition, the inference of species delimitation was performed with the Poisson tree processes model (PTP), using Maximum Likelihood phylogeny of the mitochondrial COI gene. The taxonomic revision of Macrocoeloma was provided with elaborated diagnosis, detailed descriptions and maps of geographic distribution based on examined material. The monophyly of Macrocoeloma was demonstrated after exclusion of Pericera heptacantha and P. septemspinosa. The monotypic genus Thersandrus Rathbun, 1897 is a sister group of Macrocoeloma, followed by the new genus proposed ... (Complete abstract click electronic access below)
Doutor
Do, Van Tu. "Freshwater crabs of Vietnam: diversity and conservation: Review paper". Technische Universität Dresden, 2014. https://tud.qucosa.de/id/qucosa%3A29079.
Pełny tekst źródłaKhu hệ cua nước ngọt ở Việt Nam có mức độ đa dạng và đặc hữu cao với 49 loài đã được ghi nhận, trong đó có tới 42 loài chỉ được biết đến ở Việt Nam. Ngoài ra, nhiều loài cua nước ngọt còn chưa được mô tả hay chưa được khám phá, trong khi có tới 10% trong tổng số loài đã biết đang phải đối mặt với nguy cơ tuyệt chủng. Ô nhiễm môi trường nước, đô thị hóa, phát triển công nghiệp và nông nghiệp, nơi sống bị phân mảnh và mất, phá rừng cùng với khai thác quá mức là những mối đe dọa chính đối với khu hệ này. Công tác bảo tồn trước hết phải giữ cho diện tích rừng đủ lớn để duy trì chất lượng môi trường sống cho sự tồn tại lâu dài của các loài cua này. Các nghiên cứu về phân loại học, phân bố, động lực quần thể là rất cần thiết để đánh giá tình trạng bảo tồn và đưa ra những hành động bảo tồn hiệu quả cho các loài cua nước ngọt ở Việt Nam.
Marijnissen, S. A. E. "Lake Tanganyika crabs evolution, ecology, and implications for conservation /". [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2007. http://dare.uva.nl/document/54978.
Pełny tekst źródłaBaker, Patrick. "Predation on an introduced marine snail by native crabs". Thesis, Thesis (M.S.)--University of Oregon, 1988, 1988. http://hdl.handle.net/1794/9843.
Pełny tekst źródłaCeratostoma ioornatum is an introduced marine snail in Puget Sound, Washington. Two of five native species tested as possible predators ate Ceratostoma. These two species, the crabs Cancer gracilis and Lopbppaoopeys bellys, did not eat native snails similar to Ceratpstpma, but ate native and introduced bivalves more than Ceratpstpma. The reasons for the differences in predation seemed to be explained by shell strength of the prey species. The presence of Ceratpstpma adds a new type of prey to the menu of the two crab species at the sites studied.
Bui, Thi Hong Hanh. "Detritivory in the Mangrove Sesarmid Crab Parasesarma Erythodactyla". Thesis, Griffith University, 2015. http://hdl.handle.net/10072/366242.
Pełny tekst źródłaThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Griffith School of Environment
Science, Environment, Engineering and Technology
Full Text
Kennelly, Steven James. "The Empirical Study of Marine Biological Resources". University of Sydney, Marine Studies Centre, 1999. http://hdl.handle.net/2123/390.
Pełny tekst źródłaHow, Martin J. "The fiddler crab claw-waving display : an analysis of the structure and function of a movement-based visual signal /". View thesis entry in Australian Digital Theses Program, 2007. http://thesis.anu.edu.au/public/adt-ANU20081001.111333/index.html.
Pełny tekst źródłaPeura, Jennifer Frances. "HERMIT CRAB POPULATION STRUCTURE AND ASSOCIATION WITH GASTROPOD SHELLS IN THE NORTHERN BERING SEA". OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1281.
Pełny tekst źródłaHill, Jennifer Marie. "Predator biomass and habitat characteristics affect the magnitude of consumptive and non-consumptive effects (NCEs): experiments between blue crabs, mud crabs, and oyster prey". Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41172.
Pełny tekst źródłaFerreira, Da Silva Ana Catarina. "Predation by crabs on rocky shores in north-east Atlantic". Thesis, University of Plymouth, 2008. http://hdl.handle.net/10026.1/1993.
Pełny tekst źródłaPearson, Timothy. "Adaptive responses to temperature in homogeneously and heterogeneously acclimated crabs". Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4822/.
Pełny tekst źródłaRalph, Gina M. "Quantification of Nursery Habitats for Blue Crabs in Chesapeake Bay". W&M ScholarWorks, 2014. https://scholarworks.wm.edu/etd/1539616819.
Pełny tekst źródłaDe, Bruyn Colin. "Modalités fonctionnelles et évolutives des parasitoses développées par les crabes Pinnotheridae aux dépens des échinides fouisseurs". Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209978.
Pełny tekst źródłaprimitivus exploite deux espèces Spatangidae vivant dans la Mer des Caraïbes, Meoma
ventricosa et Plagiobrissus grandis. Des approches comportementales, démographiques et
génétiques ont été adoptées afin de mettre en lumière le fonctionnement et la biologie de cette
symbiose. Par son comportement alimentaire, le crabe occasionne des lésions tégumentaires
sur ses hôtes. Celles-ci affectent la fitness de M. ventricosa, au travers de son développement
gonadique. Dissodactylus primitivus exploite ses deux espèces hôtes de façon asymétrique. La
reproduction des parasites se déroule sur les deux hôtes, alors que le recrutement ne s’effectue
que sur M. ventricosa. Ce cycle vital asymétrique du crabe serait stabilisé par la qualité et la
rareté de P. grandis. En outre, Le comportement sexuel du crabe sur M. ventricosa répondrait
aux critères de la polygynandrie à femelles mobiles. Selon ce modèle, les mâles et les
femelles se déplacent entre les hôtes à la recherche de partenaires multiples. Lors de ces
déplacements, le crabe s’aiderait de son aptitude à localiser chimiquement ses hôtes.
Néanmoins, ce mécanisme s’avère plastique et pourrait refléter l’asymétrie du cycle vital. En
effet, cette différence n’a pas d’origine génétique, car les crabes vivant au sein du site d’étude constituent la même population quelle que soit l’espèce hôte considérée. Les marqueurs
moléculaires microsatellites mis au point dans ce travail permettront lors de futurs travaux
d’affiner les observations sur les modalités d’accouplement du crabe et d’estimer sa capacité
de dispersion.
This work aimed to highlight the relationships between the host exploitation strategy of an
ectoparasite crustacean and its mating system. The pea crab Dissodactylus primitivus exploits
two Spatangidae species living in the Caribbean Sea, Meoma ventricosa and Plagiobrissus
grandis. Behavioural, demographic and genetic approaches have been conducted to examine
the functioning and biology of this symbiosis. Owing to its feeding behaviour, the crab
wounds the host tegument. The wounds negatively affect M. ventricosa's fitness through its
gonadic development. Dissodactylus primitivus asymmetrically exploits its two host species.
The reproduction of the parasites happens on each host, but the recruitment only takes place
on M. ventricosa. The asymmetrical life cycle would be stabilised par the quality and the
scarcity of P. grandis. The mating system of crabs living on M. ventricosa would correspond
to the Pure-search polygynandry of mobile females criteria. According to this model, the
males and the females practice the host switching behaviour to find several sexual partners.
During these movements, the crab could use its chemodetection ability to locate its hosts.
However, this mechanism is plastic and presumably reflects the asymmetrical life cycle of the
crab. This difference has indeed not a genetic cause because the crabs living inside the
investigated region belong to the same population, whatever the regarded host species. In
future studies, the microsatellites markers developed for this work could be used to test the
mating system of D. primitivus and to estimate its dispersion ability.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished
Choi, Kwong-chuen. "The ecology of fiddler crabs (Crustacea: Ocypodidae) at the Mai Po Marshes Nature Reserve, Hong Kong /". [Hong Kong : University of Hong Kong], 1991. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12971820.
Pełny tekst źródłaLeelapiyanart, Nongnud. "Ecophysiological studies on developing eggs and ovigerous females of intertidal crabs". Thesis, University of Canterbury. Zoology, 1996. http://hdl.handle.net/10092/5533.
Pełny tekst źródłaSpencer, David. "The Effects of Oceanographic Drivers on the Catchability of Spanner Crabs". Thesis, Griffith University, 2018. http://hdl.handle.net/10072/380993.
Pełny tekst źródłaThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Eng & Built Env
Science, Environment, Engineering and Technology
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