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Full-Text Articles in Life Sciences
Comparison Of Artificial Substrates In Bottom Fauna Studies On A Large River, David R. Mcconville
Comparison Of Artificial Substrates In Bottom Fauna Studies On A Large River, David R. Mcconville
Journal of the Minnesota Academy of Science
During the summer of 1974, five types of artificial substrates and grab sampling were evaluated for sampling efficiency in pool No. 3 of the Upper Mississippi River. A total of 35 taxa of organisms were collected by the different techniques. Ponar grab sampling collected representatives of only eight taxa, whereas concrete block samplers collected 22 taxa . Intermediate in taxonomic collection were the Hester-Dendy samplers with 21 taxa, the barbecue basket samplers with 20 taxa, the Miller samplers with 17 taxa, and conservation webbing with 12 taxa. The barbecue basket samplers were the most productive, yielding at least five times …
Studies On Schistosome Dermatitis ('Swimmer's Itch") In Minnesota, Donald E. Gilbertson, Richard Wedlund
Studies On Schistosome Dermatitis ('Swimmer's Itch") In Minnesota, Donald E. Gilbertson, Richard Wedlund
Journal of the Minnesota Academy of Science
A preliminary study was conducted to determine the causative agents of schistosome dermatitis ( "swimmer's itch") in Minnesota and to determine the incidence schistosome infection in vector snails. A total of 1180 snails were collected from ten different localities, eight of which were sites of known schistosome activity . The incidence of schistosome infection in snails from individual areas was always less than 10 percent. Cercariae of Trichobilharzia ocellata from Lymnaea stagnalis were the most frequently-found schistosomes in our study.