Global ETD Search
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Showing 1 to 10 of 10 for “"Unionid mussels"”.
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Population Genetic Structure of Unionid Mussels Across Multiple Gulf Drainages
… Texas state threatened mussel species of family Unionidae: Pleurobema riddellii (Louisiana Pigtoe), Fusconaia askewi (Texas Pigtoe), and Potamilus amphichaenus (Texas Heelsplitter). Principal component and admixture analyses paired with genetic distance estimates (GST) of these species …
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Acquired and Cross Immunity of Largemouth Bass (Micropterus Salmoides) to the Glochidia Larvae of Unionid Mussels
The glochidia larvae of freshwater mussels (family Unionidae) are temporary parasites of host fish, where they are contained within dermal cysts. The immune responses of largemouth bass (Micropterus salmoides) to glochidia of the broken rays mussel (Mapsilis reeveiana) were investigated to …
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Abiotic and biotic factors influencing the decline of native unionid mussels in the Clinch River, Virginia
Declining unionid populations in the Clinch River are of concern due to the high endemism in the diverse fauna of the Cumberlandian region. Increase in agricultural and mining activities, as well as in industry and urbanization, are coupled with unionid declines throughout the watershed. In many …
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The physiological effects of elevated carbon dioxide, in the context of non-physical fish barriers, on unionid mussels
… organisms need to be defined. Freshwater unionid mussels are a non-target taxa that have the potential to be affected by elevated CO2. Unionid mussels are some of the most threatened taxa worldwide, with more than half (71%) of the species in North America listed as threatened, endangered, …
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Feeding morphology of juvenile Utterbackia imbecillis (Bivalvia:Unionidae)
… about this relatively little studied stage of unionid mussel development. Glochidia larvae were induced to metamorphose to juveniles by using in vitro culture techniques. Juveniles were reared in a recirculating flow through trough system. Specimens were collected weekly from 0-130 days, and …
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Reproductive biology and comparative growth rates of selected species of freshwater mussels (Bivalvia: Unionidae) in the New and Greenbrier Rivers, Virginia and West Virginia
The reproductive biology of four unionid mussels, Actinonaias carinata, Elliptio dilatata, Cyclonaias tuberculata, and Tritogonia verrucosa, from the New River in Virginia and West Virginia was investigated. The gametogenic cycle, length and timing of spawning and glochidial release periods, and …
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Biological invasions in brackish waters
… responses compared to a sympatric, native unionid mussels. I finish by investigating two methods to control invasive species in brackish waters. I show that using saline, but not freshwater, shock could effectively control R. cuneata. I then demonstrate the effectiveness of two new …
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Parasites in freshwater mussels: community ecology and conservation
… system: the ecosystem-engineering freshwater mussels (Unionida) and their macroparasites. As such, this thesis has three broad aims: to characterise knowledge to date on unionid mussel parasite communities and develop tools to further knowledge in this area; to analyse the drivers of parasite …
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The Effects of Glochidiosis on Fish Respiration
Freshwater mussels of the family Unionidae begin life as parasitic larvae, known as glochidia. These larvae are temporary parasites on the gills or skin of fish. Little is known of the pathological effects of glochidia on their hosts (glochidiosis). Thus, the existence of an evolutionary arms race …