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.
Results
Showing 1 to 20 of 171 for “"Geographic distribution"”.
-
Geographic distribution of southern- and northern-form brook trout populations in southwestern Virginia
… The secondary objective was to determine the geographic distribution of southern- and northern-form brook trout populations throughout the native range using data compiled from all known genetic studies. A map of these data showed that the break between the southern and northern form is sharp, …
-
Rabies in Virginia, 1989-2003: With particular attention to animals, geographic distribution, and virus variant
… Methods: Using simple statistical methods and a geographic information system (GIS)-based approach, and fifteen years worth of animal surveillance data, the progress of this epizootic has been charted in terms of the geographic spread of the disease, the major animal species affected by the …
-
The impact of the geographic distribution of design engineers on the pace of engineering development
… is creating an environment that permits the geographic distribution of design engineers. In order to successfully distributed engineering the consequences need to be understood. Through the examination of records of project execution, this thesis investigates whether the decision to …
-
Polyploidy in Brodiaea Elegans Hoover (LILIACEAE, SENS. LAT.) and the geographic distribution of the chromosome races
… races within the species and to map their distribution. Chromosome races with 2<em>n</em> = 12, 16, 24, 32, 40, 42, and 48 are reported. The new races 2<em>n</em> = 40, 42, and 48 are reported from California. Maps of the distribution of all chromosome races are presented.</p>
-
Distributive justice in international law: : can the CDM regime support an equitable geographic distribution of projects?
… research determines whether and how an equitable geographic distribution of Clean Development Mechanism (CDM) projects can be achieved. In particular, it examines whether the CDM legal regime can achieve an equitable geographic distribution of projects, or whether the issues that contribute to the …
-
Geographic distribution of tree species diversity of the United States reveals positive association between biodiversity and site productivity
… and thus studies that incorporate greater geographic coverage and structural complexity are much needed. Here, I compiled ground-measured data from 436,177 Forest Inventory and Analysis (FIA) plots of every U.S. state except Hawaii to map current basal area, site productivity, and tree …
-
Predicting the Risk of Lyme Disease in the Midwestern United States: Surveillance Methods, Environmental Determinants, and Geographic Distribution
The use of a combination of surveillance methods is the most effective way of assessing Lyme disease risk in an area where risk is unknown. Significant environmental determinants can be identified using a GIS, and a risk map can be generated to detect unknown endemic areas and to predict where new …
-
Geographic distribution and composition of the parasite assemblage of the insectivorous bat, Miniopterus natalensis (Chiroptera: Miniopteridae), in South Africa
… assemblage, and attempted to explain the distribution of the parasites and the factors influencing it.
-
Systematics, biogeography and conservation of Bald Uakaris (Cacajao Lesson, 1840)
… Pitheciinae are limited to few studies and their geographic distribution to a few records and localities. The overall goal of this study is to investigate the phylogenetic relationship of bald uakaris, genus Cacajao, using molecular data, and to get new information on its genetic diversity and …
-
Camarões (Atyidae e Palaemonidae) da rede fluvial do Estado do Rio de Janeiro: sistemática e distribuição
Systematics and geographic distribution of freshwater shrimps (Atyidae and Palaemonidae) from the Rio de Janeiro fluvial system were studied. Some environmental factors (salinity, temperature, declivity and oxygen) influence upon species distribution. This dissertation contains an introduction, …
-
Allozyme Diversity and Hybridization in Castanea Pumila (Section Balanocastanon, Fagaceae)
… intergradation. One explanation for the observed geographic variability is hybridization between two incompletely isolated species. To explore this possibility, the geographic distribution of allozyme variation was examined for patterns indicative of a hybrid zone. Only one of six loci assayed was …
-
Contribuição ao conhecimento dos poliplacóforos do Estado do Rio de Janeiro, Brasil (Mollusca; polyplacophora)
… are emphazised, aside from observations on geographic distribution and habitat.
-
Contribuição ao conhecimento da taxonomia em Thais (Stramonita) haemastona (Linnaeus, 1767) (Mollusca, Gastropoda, Muricidae)
… important characters. Data related to geographic distribution, synonyms and records of the species in Brazil are also given.
-
Sistemática das espécies brasileiras oceladas de Trichorhina Budde-Lund, 1908 (Crustacea, Isopoda Oniscidea)
… as a key to its genera and an overview of their geographic distribution. A similar account is sketched for Trichorhina Budde-Lund, 1908, and a check list is organized for the species of the genus, constituted by 49 extant and one fossil species. Graphics depicting noduli laterales are used for …
-
UTTERBACKIA IMBECILLIS (BIVALVIA: UNIONIDAE) AS A BIOLOGICAL INDICATOR OF COPPER POLLUTION
… of aquatic ecosystems because of its widespread geographic distribution, abundance, and sedentary, filter-feeding lifestyle. The present study evaluated the physiological responses of <italic>U. imbecillis</italic> to copper. This heavy metal is an ecologically relevant stressor, as it is a …
-
Revisão taxonômica de Mischonyx Bertkau, 1880 (Opiliones: Laniatores: Gonyleptidae)
… many institutions has been studied to define the geographic distribution of the species and to identify eventual new species. Results include: ( 1) two undescribed species, herein called Mischonyx sp. nova 1 e Mischonyx sp. nova 2 are characterized. (2) Ilhaia parva Roewer, 1913 is restored from …
-
Desalination of brackish groundwater in the United States : minimum energy requirements
… one national assessment of groundwater resource distribution and availability has been conducted in the United States since the 1960s, and no national assessment has been conducted on the energy costs required to make brackish groundwater potable. Because the ionic composition of groundwater …
-
Using Molecular Diagnostics Based On Internal Transcribed Spacer 2 Sequence To Study Geographical Distribution of Holarctic Malaria Mosquitoes
… of the species to accurately determine their distribution. For identification, sequencing of the Internal Transcribed Spacer 2 region of the ribosomal DNA is analyzed. Although African Anophelines are very well studied species, there has been no recent significant research for Holarctic …
-
Taxonomia, variação morfológica e distribuição geográfica das espécies do grupo Hyla circumdata (Cope, 1870) (Amphibia, Anura, Hylidae)
… tadpoles, vocalization, natural history, and geographic distribution, revealed considerable intra- and interpopulation variation of some taxa, including geographic gradients of variation not easy to understand. Morphological characters, osteology, and natural history were added to the original …
-
Palemonídeos do Brasil (Crustacea - Decapoda - Natantia)
… as well as, coloration, type locality, geographic distribution, size of the specimens examined and other remarks. ln the conclusions the species are divided according their habitat. Those living in freshwater are placed within the Brazilian hydrographic basins. The validity of four …
Page 1 of 9