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 25 for “"Nymph"”.
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The nymph of Stylurus laurae Williamson (Odonata, Gomphinae)
Electronic Thesis or Dissertation
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Using PCR Amplification and Genetic Sequence Analysis of 18S rRNA Genes to Survey the Microbial Diversity and Distribution of Eukaryotic Microbes Inhabiting Two Thermo-acidic Streams in Yellowstone National Park, Wyoming
… (1) clarify the identity of mat forming algae in Nymph Creek (2) survey microbial species in the Nymph Creek mat over seasonal intervals along a thermal gradient (3) compare microbial species in the Nymph Creek mat with those in Alluvium Creek mats (4) evaluate microbial species in algal mats …
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Life History and Secondary Production of Caenis latipennis Banks (Ephemeroptera: Caenidae) in Honey Creek, Oklahoma
… 1999 through September 2000. The first instar nymph was described. Nymphs were separated into five development classes. Laboratory egg and nymph development rates, emergence, fecundity, voltinism, and secondary production were analyzed. C. latipennis eggs and nymphs take 132 and 1709 degree …
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The Life History and Contributions to the Ecology of Camelobaetidius variabilis Wiersema 1998 (Ephemeroptera: Baetidae) in Honey Creek, Oklahoma
… Honey Creek, OK from February 2003-April 2004. Nymph development was assessed using changes in external morphology. Laboratory reared nymphs were used to calculate number of degree days to complete development (772 degree days at 20.8° C ±.38° C), which was used to determine voltinism. Field …
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Evaluation of anther-derived, inbred, and hybrid populations of Streptocarpus X hybridus Voss
… X hybridus was examined. A 'Concorde' and 'Mixed Nymph' genotype expressed inbreeding depression within 2 generations, characterized by a reduction in corolla, leaf, and peduncle size, as well as an increase in floral deformities (flower part fusions). Inbred populations contained individuals …
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The ecology and management of the boxelder bug, Boisea trivittata (Say), (Hemiptera: rhopalidae) in the urban environment
… in urban areas. Field-collected adults and nymphs exposed to latex-painted surfaces treated with 0.1% cypermethrin, 1.0% diazinon, 0.25% bendiocarb, 0.25% chlorpyrifos, and 1.0% propetamphos resulted in more than 70% mortality with all insecticides up to 3 d after treatment for adults, and 7 …
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Do Butterflies Use "Hearing Aids"?Investigating the Structure and Function of Inflated Wing Veins in Nymphalidae
… species within the subfamily Satyrinae (Nymphalidae) have been informally reported to possess a conspicuous "inflated" or "swollen" subcostal vein on each forewing. However, the function and taxonomic diversity of these structures is unknown. This thesis comprises both experimental and …
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Kepekaan tanaman kedelai (Glycine max (L.) Merr.) terhadap hama kutu kebul (Bemisia tabaci Genn.)
… the relationship between populations of eggs, nymphs, pupa and imago, the intensity of leaf damage by flea kebul at various stadia, the level of sensitivity based on the number of ticks kebul various stadia. The results show that there is a noticeable effect between the type of soy to the …
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Infection Rates of Amblyomma Americanum and Dermacentor Variablis by Francisella Tularensis and Borrelia Lonestari in Southwest Missouri
… with tick attachment to humans. Adult and nymphal A. americanum and D. variabilis ticks were collected in June of 2009 and 2010. DNA was extracted from the ticks and used in nested PCR assays to identify F. tularensis using the fopA gene and B. lonestari using the flab gene. F. tularensis …
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Do Mosquito Pesticides Harm Their Natural Enemies? Ecological Impacts and Non-Target Effects of Larvicides on Mosquito Predators
… recommended and high concentrations. Dragonfly nymph location preference in aquariums varied between SFs and IGRs. Laccophilus larvae in IGRs spent more time moving and eating compared to SFs. Behavioral differences were among combined concentrations in both larvicide treatments, not within …
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Diversity and role of bacterial endosymbionts infecting the cassava whitefly, Bemisia tabaci (Gennadius) in Sub-Saharan Africa
… specialised cells called bacteriocytes in both nymphs and adults. Isofemale lines of different whitefly populations with varied symbiont infections were developed for comparing the effect of bacterial infection on the whitefly fitness and biology. Isofemale colonies of sub-Saharan Africa …
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Population studies of the potato leafhopper, Empoasca fabae (Harris), on alfalfa, Medicago sativa L.
… sampling programs for each growth stage (egg, nymph, and adult) were developed to study the population dynamics of this insect. Distribution patterns exhibited by each stage have been used to determine sample unit size and optimum number of samples. The sampling technique was also evaluated in …
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Release and monitoring of Laricobius nigrinus (Coleoptera: Derodontidae) for biological control of the hemlock woolly adelgid in the eastern US
… sites for 2 yr in Seattle. Unspecified causes of nymph and adult mortality were high and L. nigrinus was the dominant predator of ovisacs. Adult L. nigrinus abundance was positively related to HWA density and immature abundance was related to ovisac density, indicating an aggregation and numerical …
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Tick Control Methods for <i>Amblyomma americanum</i> in Virginia: Applications and Modeling
… <em>N. meleagris</em> provided some reduction in nymph densities, but <em>N. meleagris</em> were also found to be hosts of <em>A. americanum</em> nymphs. An agent-based model was developed to assess the use of the TickBot and extended to also include <em>N. meleagris</em> as an ITM. The TickBot …
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Abiotic Factors Contributing to the Survival of Three Tick Species in Southeastern Virginia, <i>Amblyomma Americanum</i> (Lone Star Tick), <i>Dermacentor Variabilis</i> (American Dog Tick), and <i>Amblyomma Maculatum</i> (Gulf Coast Tick)
… were recaptured. One <em>A. americanum</em> nymph and 1 <em>D. variabilis</em> female were recaptured an additional time. For <em>A</em>. <em>americanum</em>, the average time-to-recapture was 30 days with a maximum of 71 and a minimum of 8 days. Only 1 male <em>A. americanum</em> tick was …
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Possible Effects Of Climate Change On Induced Defenses In Tadpoles
… important pond predators, such as dragonfly nymphs, may emerge from ponds in the autumn instead of overwintering in the pond. Amphibians are important components of temporary pond systems, and their tadpoles can exhibit a great amount of plasticity in morphology and life history traits due to …
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Russian wheat aphid, Diuraphis noxia (Kurdjomov), ecology and reproduction on five noncultivated grass hosts in high elevation environments
… 13-18°C temperature had lower fecundity, fewer nymph production days, longer generational times, and lower intrinsic rate of increase than aphids feeding at the 18-24 °C temperature regime. Poor hosts pose greater selection pressures. The five noncultivated hosts tested were poor hosts in …
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Systematics of Tridactyloidea (Orthoptera: Caelifera): Taxonomic revision of extinct taxa with comments on extant taxa
… gap of knowledge not only in the morphology of nymph, but also in their ecology. The chapter provides a comparison of adult and nymphal characters and additionally designates Mirhipipteryx lobata as a nomen nudum. Chapter 4 is a revision of fossil tridactyloids from the Crato Formation of …
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Comparative studies of three aphelinid parasitoids of Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae) with emphasis on Eretmocerus eremicus Rose and Zolnerowich : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Plant Protection (Entomology) at Massey University, Palmerston North, New Zealand
… infested with 2nd instar greenhouse whitefly nymphs. To replicate the range of temperatures encountered in a glasshouse, these studies were performed within temperature controlled rooms set to 15, 20, 25, and 30 degrees C. The results indicated that at temperatures of 25 and 30 degrees C, both …
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Analysis of the ecological principles underpinning forest landscape restoration: a case study of wood cricket (Nemobius sylvestris) on the Isle of Wight (UK).
… was found to be limited. Few individuals of nymph (i. e. juvenile) and adult wood cricket populations were found to disperse. Wood cricket was found able to disperse up to 55 m into non-woodland habitat and mature habitat corridors were found to be used by wood cricket, but not new immature …
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