Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 2043 for “"taxa"”.
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Systematics of Tridactyloidea (Orthoptera: Caelifera): Taxonomic revision of extinct taxa with comments on extant taxa
… fossils to the other known extinct and extant taxa. In this chapter descriptions of new species and a new family are provided. Chapter 6 describes the systematics of mud crickets, pygmy mole crickets and sandgropers. Here, I provide the first phylogeny for the superfamily Tridactyloidea. This …
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Chemophenetics of selected European plant taxa
Diese Dissertation untersucht die chemische Diversität ausgewählter europäischer Pflanzen aus einer chemophänetischen Perspektive. In vier komplementären Studien werden Metabolitprofile mit taxonomischen Beziehungen, saisonalen Veränderungen und post-harvest Prozessen verknüpft. Vergleichende …
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Taxa de câmbio : um estudo sobre os determinantes, taxa de câmbio real e efetiva e crises cambiais
… os modelos que tentam elucidar como se forma a taxa de câmbio no curto e longo prazo. Serão tratados os motivos que levaram o Brasil a abandonar a política de bandas cambiais em 1999 e quais as medidas tomadas pelas autoridades econômicas, bem como o impacto destas sobre a economia. Ao longo …
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New taxa and phylogenetic placement of Asterinales from Brazil
Infected living leaves of different host plants showing black colonies belonging to Asterinales were collected in areas of Atlantic forest of Brazil in field trips during 2009–2012. The field trips were conducted in four Brazilian states and six areas: Minas Gerais (Mata do Paraíso, Mata do Seu …
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The Distribution of Three Taxa of Peromyscus in Central Washington
One aspect of the study was to define the present ranges of all types of Peromyscus in the study area; the other to determine the extent of interfertility of the groups.
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Rare and problematic taxa from the Much Wenlock Limestone Formation
… fauna including many rare and problematical taxa. This study investigates the palaeobiology and palaeoecology of five such groups: asteroids (starfish), the crinoid Calyptocymba mariae gen. et sp. nov., rostroconch molluscs, machaeridians and cornulitids. Six species of asteroids are …
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Investigating genetic vulnerability to chronic wasting disease in endangered cervid taxa
… I assess PRNP variation in endangered cervid taxa to identify polymorphisms that are potentially associated with differing vulnerability to CWD. In Chapter 1, I introduce the biological background and current status of CWD in cervids. In Chapter 2, I assess two white-tailed deer subspecies …
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Chemotassonomia e attività biologica degli oli essenziali di taxa del genere Thymus.
… chimici degli oli essenziali di differenti taxa del genere Thymus, quali validi marcatori chemotassonomici, per contribuire all identificazione delle entità indagate. La ricerca è stata finalizzata anche alla valutazione dell attività biologica, in vitro e in vivo, degli oli essenziali di …
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Morphology, Molecular Phylogeny and Genome content of Bothriochloa focusing on Australian taxa
The study focuses on the genus Bothriochloa (Andropogoneae, Poaceae) in Australia. Despite morphological features separating this genus from the closely related two genera Capillipedium and Dichanthium, (the three hereafter will be called BCD), De Wet and Harlan introduced the compilospecies …
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Towards a molecular approach for the identification of fungal taxa that contain psilocybin
… taxonomic methodologies for determining taxa of mushrooms are based primarily on morphological traits. If the mushroom specimens are dried or pulverized, the morphological characteristics are frequently disguised or no longer apparent. Included among these fungi are known to produce …
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Oviposition Site Selection By Mosquitoes: Predator-Released Kairomones And Responses To Different Taxa
Oviposition site selection is a critical reproductive behavior for egg-laying organisms that offer little to no parental care. Determining the mechanisms females use to assess sites is critical to understanding life history traits, community structure, and species interactions. Mosquitoes are …
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Δημιουργία μιας φωτογραφικής βάσης δεδομένων για taxa φυτοπλαγκτού από υγροτόπους νησιών του Αιγαίου
Η εργασία συγκροτεί μια φωτογραφική/ταξινομικά επιμελημένη βάση δεδομένων φυτοπλαγκτού από νησιωτικούς υγροτόπους στην Ελλάδα. Από συντηρημένα δείγματα μέσω μικροσκοπικής παρατήρησης (εξετάστηκαν >6.800 εικόνες), τεκμηριώθηκαν 92 είδη (72 γένη, 55 οικογένειες, 12 κλάσεις). Η βάση λειτουργεί ως …
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Avaliação da taxa de crescimento do Tribolium castaneum Herbst durante o armazenamento de milho.
… o armazenamento, mais especificamente avaliar a taxa de crescimento populacional do inseto em estudo em função da rotação utilizada durante a colheita (manual ou mecânica), e o nível de infestação dos insetos nas unidades experimentais, durante o período de armazenamento. Foram utilizadas duas …
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Estudo da influência da taxa de amortecimento na modelagem reduzida via teoria da semelhança
Two types of structures were fabricated in laboratory, and for these prototypes, reduced scale models were designed and constructed according to the structural elastic similitude conditions. These models were fabricated with different materials and geometric scales, and the number of joints in …
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Avaliação de impacto do Programa Fica Vivo! sobre a taxa de homicídios em Minas Gerais
… pelas estatísticas é que o Brasil tem uma das taxas de homicídios mais elevadas do mundo, com 1.202.245 vítimas no período de 1980 a 2012, sendo as principais vítimas jovens, pardos, com 4 a 7 anos de estudo. Nesse sentido, diante dos custos socioeconômicos que o fenômeno da criminalidade impõe …
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