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Full-Text Articles in Animal Sciences
Larval Trematodes Of Fresh-Water Snails Of Lake Itasca, Minnesota, Omer R. Larson
Larval Trematodes Of Fresh-Water Snails Of Lake Itasca, Minnesota, Omer R. Larson
Journal of the Minnesota Academy of Science
The purpose of this study was to determine the cercariae present in nine species of aquatic snails of Lake Itasca, Minnesota. Although Cort (1914), and Faust (1917) initiated cercarial survey studies in North America, no comprehensive survey has been reported from Minnesota. Sporadic reports since 1928 have described the occurrence of twenty-two species of cercariae in our state. This report adds seven species to the known cercarial fauna of Minnesota.
An Investigation Of Possible Commensalism In Red Squirrels, Yellow-Bellied Sapsuckers, And Humming-Birds At The Lake Itasca Biological Station, John C. Coulter
An Investigation Of Possible Commensalism In Red Squirrels, Yellow-Bellied Sapsuckers, And Humming-Birds At The Lake Itasca Biological Station, John C. Coulter
Journal of the Minnesota Academy of Science
This is an investigation of a relationship noted at the Lake Itasca Biological Station. It was noted that the Red Squirrel, Tamiasciurus hudsonicus, in some locations spent a considerable amount of time lapping sap from the rows of holes drilled in the White Birch, Betula papyrifera, by the Yellow-bellied Sapsuckers, Sphyropious varius varius (L.). After the invasion of the red squirrel the sapsuckers and the Ruby-throated Hummingbird, Archilochus colubris (L.) continued to utilize the same food supply as well as a considerably number of insects. The two general objectives of this endeavor were then to investigate some of the related …