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 88 for “"intraspecific variation"”.
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Intraspecific variation in Erica coccinea
… like many other Cape Erica species, has high intraspecific variability between populations. In addition to variability in floral characteristics such as colour, this species includes two distinct regeneration forms: a resprouter form which survives fire by resprouting from dormant buds in a …
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Intraspecific variation in avian growth and development: Patterns and mechanisms
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-08-01
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Accounting for intraspecific variation transforms our understanding of artiodactyl social evolution
… the evolution of social traits but have omitted intraspecific variation in social organization (IVSO) and mating systems (IVMS). My objectives were to (i) summarize the extent of IVSO and IVMS in Artiodactyla and Perissodactyla and (ii) determine the ancestral social organization and mating …
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Intraspecific Variation Among Emerald Shiners (Notropis atherinoides) of the Missouri River
… four analyses to determine if l) there were any intraspecific differences among sites, 2) the differences were related to a genetic population structure, 3) the differences were correlated with habitat types, and 4) if the differences provided a measurable performance advantage. Emerald shiners …
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Intraspecific variation in environmental and geographic space use: insights from individual movement data
… but there is growing evidence for individual variation. Here, I use movement data to investigate individual-level decisions and compromises regarding the different costs and benefits influencing individuals’ geographic locations, and the species-level spatial patterns that emerge from these. I …
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The evolution of intraspecific variation, growth, and body size in early theropod dinosaurs
… dinosaurs possessed an extremely high amount of intraspecific variation in growth. This variation had been previously interpreted as sexual difference; however, I found no evidence of this. Because this variation is widespread among early dinosaurs and their relatives, I hypothesize that this is …
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The influence of intraspecific variation in host plants on arthropod and fungal endophyte communities
An appreciation for intraspecific variation is central to the study of evolutionary biology, however community ecologists have often assumed equivalence among conspecific organisms. In recent years, intraspecific genetic variation, particularly in plants, has received more attention, and has been …
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The Role of Intraspecific Variation, Species Interactions, and Eco-evolutionary Feedbacks in Population Persistence
… Furthermore, recent studies have shown that intraspecific trait variation (ITV) in interacting species also influences population and species persistence. However, the effects of coevolution and incorporating ITV in two or more interacting species remain primarily speculative. This …
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Sources And Consequences of Ecological Intraspecific Variation In The Florida Scrub Lizard (Sceloporus Woodi)
… current study I investigated seasonal and sexual variation in foraging behavior of S. woodi and compared microhabitat use, behavior, diet, morphology, and ectoparasite load at a pine island site to S. woodi in scrub habitats. No variation in movement patterns existed between seasons and sexes. …
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Biological and Ecological Trait Associations and Analysis of Spatial and Intraspecific Variation in Fish Traits
… Chapters two and three examine spatial and intraspecific trait variability. Chapter two specifically examines large-scale life history trait variability along latitudinal gradients for twelve widely distributed fish species, including directionality of trait variation, and hypothesizing how …
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An Analysis of Intraspecific Variation in the Kangaroo Rats Dipodomys Spectabilis (Merriam) and Dipodomys Deserti (Stephens)
Made available in DSpace on 2014-12-10T18:13:20Z (GMT). No. of bitstreams: 1 6407159.pdf: 8566115 bytes, checksum: 987d45afe2100fa0911055889287b04d (MD5) Previous issue date: 1964
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Intraspecific variation in resource use, dormancy investment, and competitive ability in the facultative parthenogen Daphnia pulicaria
… and most populations maintain high degrees of intraspecific (within species or within population) variation in a wide variety of life-history traits. This pattern prompts the question: how important is this variation? This is a question that is especially motivating for evolutionary ecologists …
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Intraspecific variation and ecology of a highly restricted paleoendemic (Witsenia maura) in the south-western Cape
… are sequenced to investigate haplotypic variation within the species, and dispersal of ancestral populations. This thesis investigates the current knowledge of Witsenia, its ecology, history and distribution. An examination of flowers under UV light reveals the first evidence of UV nectar …
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The nocturnal flight calls of migratory songbirds: interspecific variation in the “zeep” complex and intraspecific variation across North America
… of the calls of closely related taxa, or variation in calls associated with age, sex, or geography. The objective of my thesis research was to investigate acoustic variation within the flight calls of songbirds to expand our understanding of these calls and their application in migration …
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Identification and isolation of microsatellite loci from the Trematode Echinostoma Trivolvis for use in interspecific and intraspecific variation studies
<p>The aim of this project was to study the population genetics of Echinostoma trivolvis, a parasitic trematode that uses multiple hosts in its lifecycle and has a significant impact on amphibian populations. Microsatellite markers were to be identified and isolated because of their highly variable …
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Dental Microwear Textures of Paranthropus robustus from Kromdraai, Drimolen, and an Enlarged Sample from Swartkrans: Ecological and Intraspecific Variation
… in dispersion. This suggests that while there is variation in textures among P. robustus samples, these differences are not outside the overall range seen for the species. </p>
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Validating Body Condition Indices As Indicators Of Individual Quality: Does Condition Explain Intraspecific Variation In Reproductive Success And Survival Among Crimson Finches (Neochmia Phaeton)?
… areas and do not hold territories such that variation in condition between individuals is not confounded by differences in habitat quality. Because little is known about crimson finches in the wild, I first describe their breeding biology and life-history traits (Chapter I). Next, I sampled …
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Characterization of the intraspecific variation within the nickel (Ni) hyperaccumulator species Senecio coronatus (Asteraceae): a preliminary analysis of genetic population structure and shoot proteome expression
… Ni hyperaccumulation has been the severe lack of intraspecific variation in the trait. Hence, the study of a single species exhibiting a significant degree of variation is highly desirable. as it avoids the use of inter-species comparative studies mostly utilized to date. The Ni hyperaccumulator …
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