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 7 of 7 for “"Echinostoma"”.
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Population Biology and Landscape Ecology of Digenetic Trematode Parasites in their Gastropod Hosts, with Special Emphasis on Echinostoma spp.
Digenetic trematode parasites are characterized by having complex life cycles involving both vertebrate and invertebrate hosts, and are grouped into 1 of 2 categories. Allogenic parasites have at least one host capable of moving between aquatic habitats, while autogenic species have all hosts …
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Identification and isolation of microsatellite loci from the Trematode Echinostoma Trivolvis for use in interspecific and intraspecific variation studies
… project was to study the population genetics of Echinostoma trivolvis, a parasitic trematode that uses multiple hosts in its lifecycle and has a significant impact on amphibian populations. Microsatellite markers were to be identified and isolated because of their highly variable nature and …
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Population Biology of Daubaylia potomaca (Nematoda:Rhabditida) in Mallard Lake, North Carolina
… limnaei) and several trematode parasites, namely Echinostoma sp., revealed some interesting biotic interactions in the system. It was found that the presence of C. l. limnaei significantly increased the mean intensity of D. potomaca (P<0.001) in the snail hosts while the presence of Echinostoma …
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Contribuição ao conhecimento da fauna helmintológica do Anu Branco (Guira Guira (G. M.))
… studied: Athesmia terolecithodes (Braun, 1899), Echinostoma uncatum Dietz, 1909, Eumegacetes medioximus Braun, 1901, Tanaisia magnicolica Freitas, 1951, Oxyspirura cruzi Rodrigues, 1962, Cyrnea semilunaris (Molin, 1860), Torquatella crotophaga Williams, 1929; Skrjabinura spiralis Gnedina, 1933, …
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The reciprocal influence of trematode parasites and malathion on developing pickerel frogs (Rana palustris)
… tests to examine effect of trematode parasite, Echinostoma trivolvis, infection (0, 10, or 30 cercaria) on the susceptibility of pickerel frog tadpoles to the widely used organophosphate insecticide malathion. LC50 values ranged from 16.5 – 17.4 mg/L, within the range reported for other …
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Effects of Atrazine and Metolachlor on Snails, Tadpoles, and Their Trematode Parasites
… in survivorship when trematode parasites (Echinostoma trivolvis) and their first intermediate host, Planorbella trivolvis snails, were exposed to a low concentration (10 ppb: 15 ppb) and high concentration (85 ppb: 100 ppb) mixture of atrazine and metolachlor, respectively. There was a …
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Environmental, Landscape, and Host-Related Factors Associated With Parasitism and Its Effects on Larvae and Metamorphic Frogs of Rana Pipiens
… and two parasites that occurred in Minnesota, Echinostoma trivolvis (and related trematodes) and Ribeiroia ondatrae, were investigated in the laboratory. Individuals were exposed to cercariae at different stages of development and monitored for survival and, in the case of R. ondatrae, for …