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Full-Text Articles in Life Sciences
Myrmecological Techniques, Arthur W. Glass, Charles L. Hamrum
Myrmecological Techniques, Arthur W. Glass, Charles L. Hamrum
Journal of the Minnesota Academy of Science
An ant colony collection-maintenance unit is described and various adaptations of it are described and illustrated. These adaptations may be used to study food preference, interspecific fighting, or predation. Methods of feeding and watering colonies and examination of individual ants are also included as well as maze constructions and colony-recognition devices that may be attached. Only techniques for observation of ant behavior are presented; experimental results are omitted.
Distribution And Habitat Preference Of Minnesota Dragonfly Species (Odonata, Anisoptera) I., Robert Evans Carlson, Myron A. Anderson, Charles L. Hamrum
Distribution And Habitat Preference Of Minnesota Dragonfly Species (Odonata, Anisoptera) I., Robert Evans Carlson, Myron A. Anderson, Charles L. Hamrum
Journal of the Minnesota Academy of Science
The Anisoptera species found in Minnesota collections are listed. Eighteen of the 63 species are reported for the first time as occurring in Minnesota. The geographical distribution of the 63 species is presented. Factors affecting geographical distribution are discussed . The seasonal distribution of common species and genera with restricted flying times is discussed.
The Summer Standing Crop, Growth And Distribution Of Chironomus Plumosus, In Lake Itasca, Minnesota, James C. Underhill, Gerald A. Cole
The Summer Standing Crop, Growth And Distribution Of Chironomus Plumosus, In Lake Itasca, Minnesota, James C. Underhill, Gerald A. Cole
Journal of the Minnesota Academy of Science
During the period 15 June to 3 September 1965, 626 Ekman dredge hauls were made in Lake Itasca, Minnesota. The numbers and weights of Chironomus plumosus L. at 6 m, 7 m, 8 m, Siefert's Hole (9.5 - l 0.4 m), and Peace Pipe Vista (11.5 - 13.7 m) depression were determined. In addition, the numbers and weights of several other benthic dipteran larvae, Cryptochironomus, Palpomyia, and Procladius, normal associates of C. plumosus, were determined. A loss of 98,407 larvae/ha/day occurred in the 6-9 m stratum during the 12 weeks. There was a decrease in numbers of larvae of 79.3% …