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Full-Text Articles in Life Sciences
Distribution And Ecology Of Orconectes Iowaensis Fitzpatrick And Orconectes Rusticus (Girard) In Minnesota, Gary S. Phillips, Larry A. Reis
Distribution And Ecology Of Orconectes Iowaensis Fitzpatrick And Orconectes Rusticus (Girard) In Minnesota, Gary S. Phillips, Larry A. Reis
Journal of the Minnesota Academy of Science
During 1979, a field study was conducted to determine the species of crayfish present in southern Minnesota. Specimens of Orconectes iowaensis Fitzpatrick, Orconectes rusticus (Girard), and Orconectes virilis (Hagen) were collected. These represent new state records for O. iowaensis and O. rusticus. O. iowaensis appears restricted to the Root River drainage system in extreme southeastern Minnesota. O. rusticus was found in the West Fork of the Des Moines River in southwestern Minnesota and the Cedar River drainage system in south central Minnesota. Notes on the ecology of these species are included.
Macroinvertebrate Populations In The Upper Mississippi River, David R. Mcconville
Macroinvertebrate Populations In The Upper Mississippi River, David R. Mcconville
Journal of the Minnesota Academy of Science
The macroinvertebrate community of the Mississippi River near Monticell, Minnesota, was examined for 22 months. Quantitative bottom fauna information was obtained by use of concrete block artificial substrate sampling units. Representative organisms were obtained from seven (7) orders, 15 families and 35 genera of benthic macroinvertebrates. All taxa collected displayed definite seasonal trends. The Orders Trichoptera, Diptera, and Ephemeroptera were the most abundant groups collected, Trichoptera (Hydropsyche and Cheumatopsyche) were the dominant members of the benthic population in both numbers and biomass. Midges and blackflies were the dominant Diptera. Pseudocloeon, Stenonema, and Ephemerella were the most frequently collected mayflies.
Nesting And Brood Rearing Habitat Of The Upland Sandpiper, John C. Dorio, Alfred H. Grewe
Nesting And Brood Rearing Habitat Of The Upland Sandpiper, John C. Dorio, Alfred H. Grewe
Journal of the Minnesota Academy of Science
The upland sandpiper population breeding in Morrison county in central Minnesota was studied in 1975 and 1976. Nests were found in old fields (73 percent), pastures (20 percent), and in a sedge-grass meadow (7 percent). Most nests were discovered in vegetation 22.5 to 35.0 cm tall and on the average were 13.2 m. from an aspen or willow edge. Seven grasses and 23 forbs made up the plant species composition at 14 nest-sites. Brood rearing areas were old fields and over-grazed pastures. Upland sandpipers prefer to feed in vegetation that does not exceed 10 cm.
Shovelnose Sturgeon (Scaphirhynchus Platorhynchus) In The Minnesota River, Paul Durkee, Brian Paulson, Robert Bellig
Shovelnose Sturgeon (Scaphirhynchus Platorhynchus) In The Minnesota River, Paul Durkee, Brian Paulson, Robert Bellig
Journal of the Minnesota Academy of Science
The shovelnose sturgeon, Scaphirhyncus platorhyncus, according to Eddy and Underhill (1974) has not been reported from the Minnesota River for a number of years. Recently, Wilcox et. al. (1978) reported a single adult taken in 1974, and two others in 1976. Our survey of the fishes in the Minnesota River showed a substantial number of shovelnose sturgeon, at least in certain locations. Twenty specimens were taken in 42 gill net days. Other data obtained included food habits and age-length relationships. Food habits were determined through volumetric analysis of stomach contents, and ages were obtained by sectioning the marginal pectoral fin …