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 13 of 13 for “"Damselflies"”.
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Population genetic structure of Antarctic springtails (Collembola) and New Zealand damselflies (Odonata)
Since Darwin (Darwin, 1859), the process of speciation and maintenance of biological diversity has caused intensive debate in the scientific and non-scientific communities alike. The ability to analyze differences in the molecular structure of enzymes and DNA sequences has provided an extremely …
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Environmental controls in the seasonal succession and synchronization of development in some pond species of damselflies (Odonata: Zygoptera)
Environmental factors which control seasonal succession and synchronization of development in seven species of pond-dwelling Zygoptera were investigate. A three phase succession was observed. Three species of Coenagrionidae, Coenagrion angulatum, C. resolutum and Enallagma boreale which …
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Variation in fluctuating asymmetry among nine damselfly species.
… measured levels of FA among multiple species of damselflies from the same environment to determine the relative roles of environmental stress and species specific developmental instability. Damselflies of nine species were collected from a central Texas wetland. Calculations of their FA were …
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Causes and consequences of color polymorphism in Rambur’s forktail (Ischnura ramburii)
… female forms in nature. Female-polymorphic damselflies provide ideal systems in which to study how female variation evolves. Color polymorphic damselflies typically contain one female morph that resembles the male (“andromorph”) and one or more alternative morphs with distinctive coloration …
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The potential and promotion of entotourism in Gunung Ledang, Johor, Malaysia
… dragonflies, moths, beetles, cicadas and damselflies. Field trials indicated that these insects were viable attractions as they are readily visible, safe, easily recognizable, with some having linkage to local culture. Regardless of the different environmental ambience, time of observation …
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The potential and promotion of entotourism in Gunung Ledang, Johor, Malaysia
… dragonflies, moths, beetles, cicadas and damselflies. Field trials indicated that these insects were viable attractions as they are readily visible, safe, easily recognizable, with some having linkage to local culture. Regardless of the different environmental ambience, time of observation …
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Gregarine parasitism in dragonfly populations of Central Texas with an assessment of fitness costs in Erythemis simplicicollis.
… studies have more commonly involved damselflies, and some have considered gregarines to rarely infect dragonflies. In this study, dragonfly populations were surveyed for gregarines and an assessment of fitness costs was made in a common and widespread host species, Erythemis …
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Descending premotor target tracking systems in flying insects
… Chapter 3 identifies TSDNs in demoiselle damselflies and compares their response properties to those previously described in dragonflies. Demoiselle TSDNs are also found to integrate binocular information, which is further elaborated with prism and eyepatch experiments. Chapter 4 describes …
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The Zygoptera or damsel-flies of Illinois
Made available in DSpace on 2014-09-18T16:21:22Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) zygopteraordamse00garm_0.pdf: 26252158 bytes, checksum: 9bfb74a279f74730790bf3af745eadd2 (MD5) Previous issue date: 1916
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Factors affecting growth and condition of stocked rainbow trout in eastern Washington lakes
… predictors including biomass of coenagrionid damselflies and Aglaodiaptomus copepods explained approximately 42% and 49% of the lake-to-lake variation in rainbow trout growth and condition, respectively. In addition, more than 84% of the variation in rainbow trout condition was explained by …
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Host-Parasite Interactions Within Food Webs
… species interactions. In Chapter 2 I used larval damselflies and their dominant fish predator to test how cascading effects of predators on host competitive interactions and resource acquisition affected a critical component of damselfly immune function, the phenoloxidase (PO) cascade. I found …
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Hormonal control of flight metabolism in Odonata?
… (Anisoptera: Libellulidae) and the damselflies Pseudagrion inconspicuum and Ischnura senegalensis (Zygoptera: Coenagrionidae). After isolation ofthe peptides by reversed phase high performance liquid chromatography, the primary structures were established by Edman sequencing and mass …
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Analysis of Hydric Pine Flatwood Ephemeral Pool Macroinvertebrate and Crustacean Assemblages Along a Temporal and Spatial Gradient From a Hypothesized Colonial Source
… for future monitoring. Taxa such as dragonflies, damselflies, Caenis sp., Ablabesmyia rhamphe grp., and Zavreliella marmorata could be expected to be indicators of adequate wetland conditions. In the larger wetland areas, the loss of longer-lived species, like the dragonflies and mayflies, …