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 12 of 12 for “"stonefly"”.
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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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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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Gene Flow and Dispersal Among Populations of the Stonefly <i>Peltoperla tarteri</i> (Plecoptera: Peltoperlidae) in the Southern Appalachians
… gene flow and dispersal among populations of the stonefly <i>Peltoperla tarteri</i> in the Southern Appalachians. The control region of <i>P. tarteri</i> is approximately 1270 base pairs (bp) in length, 81% AT-rich, and contains variable numbers of a 74 bp tandem repeat containing the sequence …
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Relative importance of Conservation Reserve Programs to mayfly, stonefly, and caddisfly species richness in the Kaskaskia River basin of Illinois
The Conservation Reserve (CRP) and Conservation Reserve Enhancement Programs (CREP), funded by federal and state government, offer farmers financial incentives to take erosive agricultural lands out of production. Within these program landscapes, several best management practices, including …
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Community responses of aquatic macroinvertebrates to heavy metals in laboratory and outdoor experimental streams
… morosa and Chimarra sp.) to predation by the Stonefly, Paragnetina fumosa. Caddisflies were also the major component of stonefly diets and were consumed Significantly more frequently in dosed Streams than controls. These results demonstrate that single Species bioassays were inadequate for …
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Investigation of DNA Variability and Phylogenetic Relationships of Perlesta (Plecoptera: Perlidae) in Mississippi
… 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, <em>Perlesta placida</em>, but taxonomic work in the genus since 1989 has resulted in the recognition of additional species. These species were mostly …
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Biodiversity and Phenology of the Epibenthic Macroinvertebrate Fauna in a First Order Mississippi Stream
… perlids are predators on aquatic insects. The stonefly species <em>Perlesta placida</em>, displayed an extended diapause, with nymphs present in the March and June 2014 collections, ensuring absence from samples from July 2014 through January 2015, and re-appearance in the February and March …
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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
… 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. However, due to habitat …
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Phylogeograpy of Aphanicercella cassida (Plecoptera : Notonemourida) : cryptic speciation?
… 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 limited range. Of particular interest is a population in Mpumalanga (north of South Africa) which is very disjunct from the …
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The resistance of three aquatic insect detritivores to fly ash constituents
… excursions and heavy metals) in three species of stonefly nymphs (Plecoptera), Tallaperla maria, Pteronarcys dorsata and Pteronarcys proteus were investigated in laboratory and field located bioassays. Fly ash particulates were non-toxic to the three species. All three species were highly …
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Energy Flow in a Floodplain Aquifer Ecosystem
… oxygen hotspots corresponded with migration of stonefly nymphs 100’s of meters into the aquifer. The U-shaped responses and biogeochemical trends suggest a major threshold at bulk oxygen concentrations of 3-5 mg/l. Collectively, these findings indicate the role of dissolved oxygen as a key …
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Energy Flow in a Floodplain Aquifer Ecosystem
… oxygen hotspots corresponded with migration of stonefly nymphs 100’s of meters into the aquifer. The U-shaped responses and biogeochemical trends suggest a major threshold at bulk oxygen concentrations of 3-5 mg/l. Collectively, these findings indicate the role of dissolved oxygen as a key …