Relevant bibliographies by topics / Cryptic variation / Dissertations / Theses
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Dissertations / Theses on the topic 'Cryptic variation'

Author: Grafiati
Published: 28 June 2021
Last updated: 12 February 2022

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1

KIssane, Kelly C. "Geographic variation and cryptic species evidence from natural populations of the fishing spider Dolomedes triton /." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3275834.

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2

Moeser, Andrew A. "Genetic analyses of sympatric cryptic species in the Neotropical catfish, Pimelodella chagresi." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82294.

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I used microsatellite markers to assess reproductive isolation between cryptic, sympatric lineages of a freshwater catfish (Pimelodella chagresi ). These are "cryptic" lineages because they cannot be distinguished visually on the basis of morphological characters, and currently they are recognized as a single species. Previous analyses utilizing mitochondrial DNA (mtDNA) indicated that two highly divergent lineages are present in lower Central America, and that these lineages are the result of independent colonization events from South American source populations. I isolated eight dinucleotide
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3

Tri, Baskoro T. S. "Cryptic species within Anopheles barbirostris Van der Wulp, 1884 : inferred from nuclear and mitochondrial gene sequence variation." Thesis, University of Liverpool, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250419.

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4

Van, Leeuwen Travis Edward. "Variation in metabolic rate between individuals and species : cryptic physiological tradeoffs underlying habitat partitioning and life history strategies of juvenile salmonids." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/28689.

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Physiological traits such as standard metabolic rate have been shown to vary up to half an order of magnitude between individuals and species and influence key life history tradeoffs in juvenile salmonids (e.g. smolt timing). The purpose of my thesis research was to examine the relationship between food consumption, dominance and disproportionate feeding on physiological traits and adaptive strategies of juvenile salmonids. Results show that SMR is positively correlated with food consumption and growth in juvenile coho salmon which showed a reduction in SMR under low food and an elevation i
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5

Bazzano, Jason. "Differences in Sexual Dimorphism and Influences of Sexual Dichromatism on Crypsis Among Populations of the Jumping Spider Habronattus oregonensis." PDXScholar, 2011. https://pdxscholar.library.pdx.edu/open_access_etds/272.

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Crypsis can be an important mechanism of predator avoidance for organisms. However, many species exhibit sexual dichromatism, in which the males possess a suite of colorations in order to attract female attention. The resulting differences in crypsis between the males and females can provide insight into the relative strengths of the sexually and naturally selective forces shaping the coloration of the organism, as well as clues regarding potential sensory biases of the selecting sex. In this study, I examine variation in the coloration of four Pacific Northwest populations of the sexually dim
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6

Aissaoui, Cherifa. "Les mollusques du Golfe de Gabès (Méditerranée sud-orientale) : néo-endemisme ou variations écophénotypiques ?" Thesis, Paris, Muséum national d'histoire naturelle, 2016. http://www.theses.fr/2016MNHN0014/document.

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L’originalité du golfe de Gabès (Sud de la Tunisie) a été reconnue par les malacologistes depuis le19ème siècle mais reste mal définie. Les espèces de cette région présentent des caractères morphologiques qui ont conduit à l’établissement de variétés, sous-espèces et espèces faiblement caractérisées. Certains auteurs les traitent comme des taxons endémiques tandis que d'autres les considèrent comme de simples variants locaux d'espèces à large répartition méditerranéenne. Le manque d’information concernant la valeur taxonomique de ces caractères morphologiques ne permet pas de traiter de façon
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7

Colson-Proch, Céline. "Écophysiologie évolutive en milieu aquatique souterrain : influence des variations de température sur la distribution de Niphargus rhenorhodanensis et Proasellus valdensis." Thesis, Lyon 1, 2009. http://www.theses.fr/2009LYO10195.

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La température est le paramètre abiotique qui influence de façon majoritaire les traits d’histoire de vie des espèces ectothermes. Pour appréhender les relations entre physiologie, environnement et histoire évolutive et leur influence respective sur la délimitation des aires de distribution des espèces, ce travail exploite les caractéristiques thermiques du milieu souterrain. Les résultats réfutent l’hypothèse de sténothermie des deux organismes hypogés étudiés Niphargus rhenorhodanensis et Proasellus valdensis et prouvent que l’histoire évolutive, la dispersion ou la compétition sont des para
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8

Cunche, Mathieu. "Codes AL-FEC hautes performances pour les canaux à effacements : variations autour des codes LDPC." Phd thesis, Grenoble, 2010. http://tel.archives-ouvertes.fr/tel-00451336.

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Nous assistons au développement rapide des solutions de diffusion de contenus sur des systèmes, où en plus des traditionnelles corruptions de l'information dans les couches basses, se pose le problème des pertes de paquets d'informations. Le besoin de fiabiliser ces systèmes de transmission a conduit à l'émergence de codes correcteurs d'effacements, qui grâce à l'ajout d'informations redondantes, permettent de reconstruire l'information perdue. Dans cette thèse nous abordons le problème de la conception de codes à effacements ayant de bonnes capacités de correction et dont les algorithmes de d
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9

Smith, Geneviève Kathleen. "The coexistence of ecologically similar species." 2013. http://hdl.handle.net/2152/23186.

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The biological diversity on planet Earth is astounding. Understanding the origins of this diversity, and how it is maintained, are the twin goals of ecology and evolutionary biology. An early and oft-repeated insight in this investigation is that that similar organisms cannot coexist indefinitely. Theory predicts that individuals and species will compete for limited resources and whichever has even a slight advantage will drive all others extinct in a process known as ‘competitive exclusion’. By diversifying, species avoid competition, thereby ‘stabilizing’ their coexistence. Yet natural syste
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10

Zhang, Bing. "Habitat selection, cryptic diversity, phylogeny, and phylogeography of the European Lepidocyrtus lanuginosus species group (Collembola: Entomobryidae)." Doctoral thesis, 2018. http://hdl.handle.net/11858/00-1735-0000-002E-E58C-1.

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11

Pereira-da-Conceicoa, Lyndall L., Benjamin W. Price, Helen Margaret Barber-James, Nigel P. Barker, Moor Ferdy C. De, and Martin Herrer Villet. "Cryptic variation in an ecological indicator organism: mitochondrial and nuclear DNA sequence data confirm distinct lineages of Baetis harrisoni Barnard (Ephemeroptera: Baetidae) in Southern Africa." 2012. http://hdl.handle.net/10962/d1005976.

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Baetis harrisoni Barnard is a mayfly frequently encountered in river studies across Africa, but the external morphological features used for identifying nymphs have been observed to vary subtly between different geographic locations. It has been associated with a wide range of ecological conditions, including pH extremes of pH 2.9–10.0 in polluted waters. We present a molecular study of the genetic variation within B. harrisoni across 21 rivers in its distribution range in southern Africa.
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12

Pereira-da-Conceicoa, Lyundall L., Benjamin W. Price, Helen Margaret Barber-James, Nigel P. Barker, Moor Ferdy C. De, and Martin Herrer Villet. "Cryptic variation in an ecological indicator organism: mitochondrial and nuclear DNA sequence data confirm distinct lineages of Baetis harrisoni Barnard (Ephemeroptera: Baetidae) in southern Africa." 2012. http://hdl.handle.net/10962/d1010990.

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Baetis harrisoni Barnard is a mayfly frequently encountered in river studies across Africa, but the external morphological features used for identifying nymphs have been observed to vary subtly between different geographic locations. It has been associated with a wide range of ecological conditions, including pH extremes of pH 2.9–10.0 in polluted waters. We present a molecular study of the genetic variation within B. harrisoni across 21 rivers in its distribution range in southern Africa.
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13

Hanzlíčková, Johana. "Zhodnocení kryptické diverzity ve skupině lakušníku niťolistého (Ranunculus trichophyllus agg.)." Master's thesis, 2021. http://www.nusl.cz/ntk/nusl-446186.

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Ranunculus trichophyllus agg. (thread-leaved water crowfoot) represents a taxonomically challenging group of aquatic plants in which the presence of several significantly different genotypes and the genome size variation have been recently revealed. The results of previous studies suggest that cryptic taxa occur in this group, being so far overlooked due to considerable morphological reduction and extensivephenotypic plasticity. In this thesis, the variation and genetic relationships of four morphologically similar homophyllous water-crowfoot species was critically assessed in the area of Cent
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14

Liu, Fan-Di, and 劉汎笛. "Existence and Variation—The Chinese Ink Paintings of Crypsis." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/pt36s6.

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碩士<br>國立臺南大學<br>美術學系碩士班<br>102<br>The subject of this thesis “Crypsis” is based on the social experience of author. And developed into a series of the reflecting what community is projecting on the author. That is the art been presented by the author’s own experience. The subject what the author wants to discuss by the animal’s appearance is the insecurity of human kind who is living with groups, and the action of self-protection for keeping the security distance between humans. The theoretical bases of the creations in this thesis are from the theories of Charles Darwin, Sigmund Freud, etc. A
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15

Isaac, Leigh Anne. "Exploring ecological correlates associated with dorsal colour variation in garter snakes." Thesis, 2010. http://hdl.handle.net/1828/5006.

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Colours influence numerous aspects of an animal’s ecology and the adaptive significance of colour variation has been intensively studied in diverse taxonomic groups. This study was motivated by the question: Why do garter snakes vary in colour? To answer this question, I focused on Western Terrestrial Garter Snakes, Thamnophis elegans, which exhibit geographic variation in colouration (dark morph vs. light morph), and two different species of garter snake that occur in the same geographic region but vary in colour –light T. elegans and the Common Garter Snake, T. sirtalis. My work provid
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