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- Agriculture (2)
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- Aquatic insects (1)
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- Bacteriology--Cultures and culture media (1)
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- Birds--Breeding (1)
- Birds--Nests (1)
- Botany--Study and teaching (1)
- Cannon River (Minn.) (1)
- Diatoms (1)
- Diptera (1)
- Fish surveys (1)
- Fishing nets (1)
- Foxes--Age determination (1)
- Peat (1)
- Plant communities (1)
- Plant diversity (1)
- Red fox (1)
- Red-winged blackbird (1)
- Snake River (Minn.) (1)
- Sponges--Minnesota (1)
- Teeth--Radiography (1)
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- Yeast (1)
Articles 1 - 10 of 10
Full-Text Articles in Life Sciences
Some Optimal Growth Media For Use In The Botany Classroom, Marshall D. Sundberg
Some Optimal Growth Media For Use In The Botany Classroom, Marshall D. Sundberg
Journal of the Minnesota Academy of Science
Cultures of various bacteria and fungi are often used in introductory botany classes. In most cases the students are simply asked to examine these colonies or to prepare a microscope slide. Directions are given in this paper for the preparation of optimal growth media which may be consumed by the student. This provides a new twist to otherwise routine laboratory exercises.
Use Of Peat Hydrolysate For Cultivation Of The Yeast, Candida Utilis, Jeffrey S. Denny, Allen G. Good
Use Of Peat Hydrolysate For Cultivation Of The Yeast, Candida Utilis, Jeffrey S. Denny, Allen G. Good
Journal of the Minnesota Academy of Science
No abstract provided.
Ultrastructural Features Of Spicules Of Five Species Of Minnesota Sponges, Louise A. Rollins, Lynn C. Hyland
Ultrastructural Features Of Spicules Of Five Species Of Minnesota Sponges, Louise A. Rollins, Lynn C. Hyland
Journal of the Minnesota Academy of Science
No abstract provided.
Observations Of Diatom Populations In The Snake River, Minnesota, Donald G. Kaddatz, Keith M. Knutson
Observations Of Diatom Populations In The Snake River, Minnesota, Donald G. Kaddatz, Keith M. Knutson
Journal of the Minnesota Academy of Science
No abstract provided.
Acid Rains: Implications For Agriculture, Prabhu D. Rawate
Acid Rains: Implications For Agriculture, Prabhu D. Rawate
Journal of the Minnesota Academy of Science
No abstract provided.
Winter Sampling Of Benthic Stream Fishes In Minnesota With A One-Man Net, James E. Erickson
Winter Sampling Of Benthic Stream Fishes In Minnesota With A One-Man Net, James E. Erickson
Journal of the Minnesota Academy of Science
Newly designed one-man nets were used extensively between 1973 and 1977 to collect fishes in a variety of stream habitats in southeastern Minnesota. They proved to be especially effective In winter sampling of benthic stream fishes such as Etheostome zonale, Etheostome ceeruleum, Percina phoxocephala, Percina shumardi, Percina caprodes, Rhinichthyes cataractae, and Noturus flavus. Effectiveness and potential importance of these one-man nets as winter sampling devices was demonstrated during three consecutive winters of use In the Cannon River at Welch, Goodhue County, Minnesota.
Nesting Ecology Of The Red-Winged Blackbird In North Central Minnesota, Daniel W. Moulton
Nesting Ecology Of The Red-Winged Blackbird In North Central Minnesota, Daniel W. Moulton
Journal of the Minnesota Academy of Science
Reproductive success of a Red-winged Blackbird population nesting in marsh-like habitat In north central Minnesota was estimated. Territorial defense by males began in late April, and nest initiation occurred from mid-May through about mid-July. Nest-starts appeared to be divided into two categories: initial attempts which occurred in late May with a high degree of synchrony, and renesting attempts which occurred from about June 4-July 8, The nesting season lasted only about two months. A minimum of 20 percent of marked females renested on the study area, and others may have renested elsewhere. Three of the six females that renested switched …
Association Of Aquatic Insects To Macrophytes In An Agricultural Drainage Ditch, Kevin King, John Flypaa, Henry W. Quade
Association Of Aquatic Insects To Macrophytes In An Agricultural Drainage Ditch, Kevin King, John Flypaa, Henry W. Quade
Journal of the Minnesota Academy of Science
The aquatic insects associated with five species of aquatic macrophytes were collected and identified from a drainage ditch in Le Suer County. A total of 21,160 specimens from eight orders were recovered with Diptera being the dominant. Tests of association, using the Coefficient of Community and Percent Similarity revealed a unique community associated with Potamogeton nodosus. Further, the authors found that the same information generated from the study could have been accomplished without the detailed taxonomy.
Vegetation Within A Portion Of The Copper-Nickel Study Region, Nancy Sather
Vegetation Within A Portion Of The Copper-Nickel Study Region, Nancy Sather
Journal of the Minnesota Academy of Science
Cluster analysis of data from 277 Braun-Blanquet releves differentiates 11 major forested communities in a 1,450 sq km area of northeastern Minnesota. Upland communities include black spruce-jack pine, jack pine, red pine, aspen-birch, aspen-birch-fir, and mixed conifer-deciduous. Forested wetland communities include black spruce, tamarack, cedar, ash, and alder carr. The greatest floristic differences are between those communities at opposite extremes of the moisture spectrum, and greatest similarities between red pine and aspen-birch-fir communities. Floristic similarities and differences are-reflected by the positions of communities in the synecological ·moisture nutrient field Structural differences between upland communities are more notable than floristic differences.
Age Study Of Minnesota Red Fox Using Cementum Annulae Counts And Tooth X-Rays, Dennis E. Simon, Merrill J. Frydendall
Age Study Of Minnesota Red Fox Using Cementum Annulae Counts And Tooth X-Rays, Dennis E. Simon, Merrill J. Frydendall
Journal of the Minnesota Academy of Science
A prerequisite to the proper management of an animal species is understanding of its population dynamics. Attempting this, the age structure of 297 red fox trapped or shot in southern Minnesota was investigated, using the techniques of tooth sectioning and x-ray. Results from two seasons (1977 and 1978) were similar, with 76.8 percent of the harvested population being juveniles (78.4 percent, 1977 and 74.6 percent, 1978), whereas only 0 .6 percent of the total were in the 4½ year old class. The percentage of juveniles corresponds closely to the numbers predicted by a Department of Natural Resources model developed by …