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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 37 for “"Plecoptera"”.
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Phylogeograpy of Aphanicercella cassida (Plecoptera : Notonemourida) : cryptic speciation?
Stoneflies (Plecoptera) in South Africa are limited to cool pristine mountain streams. This provides them with very limited habitat in which to survive. The species of stonefly studied in this project (Aphanicercella cassida) has a very wide distribution unlike most other species which have a …
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Systematics of the Notonemouridae (Plecoptera) of southern Africa
The broad aims of this research, following the establishment of a firm taxonomic base for the southern African Notonemouridae, were to investigate species boundaries and to infer phylogenetic relationships in the Aphanicerca capensis Tillyard species complex using morphological, behavioural and …
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Upper lethal temperature relations of Paragnetina media Walker (Plecoptera: Perlidae)
Thesis (M.S.)--Michigan State University. Dept. of Entomology and the W.K. Kellogg Biological Station, 1968
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Ecology and energetics of an aquatic detritivore, Pteronarcys proteus (Plecoptera: Pteronarcyidae)
Life history, food habits, energetics, and production by nymphs of Pteronarcys proteus were measured. The life cycle lasted four years in an Appalachian mountain stream in southwestern Virginia. Adults emerged late May to early June, and eggs deposited did not hatch until the following spring. …
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Holomorphology and systematics of the eastern Nearctic stonefly genus Remenus Ricker (Plecoptera: Perlodidae)
The holomorphology of the eastern Nearctic stonefly genus Remenus Ricker is reviewed using scanning electron microscopy, color photomicrographs and COI DNA barcodes. Examination of all life stages has resulted in new comparative descriptions and a new key to adults. Remenus daniellae Verdone and …
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Investigation of DNA Variability and Phylogenetic Relationships of Perlesta (Plecoptera: Perlidae) in Mississippi
<p>The genus <em>Perlesta</em> Banks, 1906 (Plecoptera: Perlidae) consists of 35 species, 33 native to the United States and Canada and two native to China. For over a century these small, brown stonefly adults and freckled yellow nymphs have gone by the name of the type species of the genus, …
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Phylogeny of the Polyneopterous Insects With Emphasis on Plecoptera: Molecular and Morpological Evidence
… + Zoraptera, and a relatively basal placement of Plecoptera. The analyses also support a sister taxon relationship between the newly described Mantophasmatodea and Grylloblattodea, a small order of cryophilic insects confined to the northwestern Americas and northeastern Asia. This placement …
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The stonefly genus Isogenoides Klapálek (Plecoptera: Perlodidae) of North America: Systematics, behavior and ecology.
The stonefly genus Isogenoides is revised following a holomorphological approach utilizing traditional morphology and behavioral lines of evidence. Species keys are provided for all life stages. One species, I. krumholzi (Ricker) is considered a synonym of I. doratus (Frison). Detailed species …
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The distribution and diversity of an entire assemblage of Plecoptera (stoneflies) inhabiting Indiana, USA
Plecoptera are an environmentally sensitive order of aquatic insects commonly used in water quality monitoring and are experiencing declines across the globe. A dataset containing over 6,300 specimen records from regional museums, literature records, and new collections was used to answer three …
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The ephemeroptera, plecoptera, and trichoptera of Missouri state parks with notes on biomonitoring, mesohabitat associations, and distribution
… sampled for immature and adult Ephemeroptera, Plecoptera, and Trichoptera (EPT) through 2002 and early 2003. All totaled, 34,251 EPT larvae were collected, all specimens of which were identified to the lowest taxon possible. Of approximately 70,000 adult specimens collected, 10,342 were …
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Molecular phylogenetics of the North American stoneflies (Insecta: Plecoptera), with description of a new species and family
Stoneflies (Insecta: Plecoptera) are vital to aquatic ecological systems worldwide. Their value as bioindicators and ideal subjects for biogeographic and phylogeographic studies is directly dependent on the integrity of their phylogeny. Yet, a fully-resolved and well-supported phylogeny of the …
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Food aquisition [i.e. acquisition] behavior of Pycnopsyche Guttifer (Limnephilidae: Trichoptera), Pteronarcys Pictetti (Pteronarcidae: Plecoptera) and Orconectes Propinquis (Decapoda: Crustacea)
Thesis (M.S.)--Michigan State University. Dept. of Entomology, 1983
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Gene Flow and Dispersal Among Populations of the Stonefly <i>Peltoperla tarteri</i> (Plecoptera: Peltoperlidae) in the Southern Appalachians
Despite a number of recent studies focused on the issue, patterns of stream insect dispersal in temperate streams of North America remain poorly understood. Movement of benthic invertebrates is notoriously difficult to measure directly using traditional means; however, genetic markers provide an …
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Range-wide Distribution and Genetic Structure of Acroneuria frisoni Stark and Brown, 1991 (Plecoptera; Perlidae): Tools for Reintroduction to Central Illinois
Acroneuria frisoni Stark & Brown, 1991(Plecoptera: Perlidae), is a highly threatened stonefly species which in Illinois alone has experienced a 98% loss of its historical range. Some previously degraded drainages within the state have improved in quality and could at present support this species. …
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Caracterização taxonômica e biologia de uma espécie de Kempnyia Klapálek (Plecoptera, Perlidae) em um riacho da Floresta da Tijuca, Rio de Janeiro (RJ)
The adults and nymphs of Kempnyia tijucana are herein described, being differentiated from the other species of the genus by distinct morphological characters. ln the nymphs the absence of the intersegmental gills III is remarkable, not occurring in any other species of the genus. The comparison …
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Land use influences on benthic invertebrate assemblages in southern Appalachian agricultural streams
… was greater in FA streams. Pollution-sensitive Plecoptera were relatively more abundant in FA streams, while tolerant Diptera were more abundant in CA streams. High diversity and Plecoptera abundance was related to high habitat quality, more riparian vegetation, low nitrates, and low summer …
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The Effects of a Paper Mill discharge on the Benthic Macro- Invertebrates of the River Llynfi
… of the discharge species belonging to the Plecoptera, Ephemeroptera and Trichoptera tended to become more important members of the benthic community.<br/><br/>The biological results were analysed with standard statistical tests, various biotic indices and computer programs.The results of …
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Influence of nature preserves on macroinvertebrate assemblages, water quality, and habitat quality along two urban streams
… percentage of Ephemeroptera, Trichoptera, and Plecoptera (%EPT) showed no improvements at sites located further downstream within the preserves compared to those outside or upstream in either stream. Water quality monitoring showed no consistent trends and seemed to be confounded by …
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Temporal Dynamics of Benthic Macroinvertebrate Communities and Their Response to Elevated Specific Conductance in Headwater Streams of the Appalachian Coalfields
… means for six metrics. Metrics involving % Plecoptera and/or % Trichoptera were not sensitive to elevated SC, as Leuctridae and Hydropsychidae exhibited increased abundance in streams with elevated SC. Best scores for benthic macroinvertebrate community metrics differed based on selected …
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Relative importance of Conservation Reserve Programs to mayfly, stonefly, and caddisfly species richness in the Kaskaskia River basin of Illinois
… sensitive orders, Ephemeroptera (mayflies), Plecoptera (stoneflies), and Trichoptera (caddisflies) (EPT) in the Kaskaskia River basin, a heavily impacted, predominantly agricultural watershed in central and southern Illinois. A total of 10,522 EPT specimens were examined from 84 sites across …
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