Zoology Commons^™

Annual And Season Weight Changes In A Thirteen-Lined Ground Squirrel Population, Itasca State Park, Minnesota, Bonnie M. Hohn, William H. Marshall

Journal of the Minnesota Academy of Science

The ecology of the thirteen-lined ground squirrel (Citellus tridecemlineotus) has been under investigation since 1954 on the grounds of the University of Minnesota Forestry and Biological Station located in Itasca State Park, Minnesota. Over the 11-year period, data have been collected on individuals of this small, relatively isolated, population. Studies of population dynamics, movements, activity patterns, and weights have been stressed, chiefly during the three summer months of June, July, and August. In 1964, the senior author carried out field work for the entire season from April 30 to September 14.

Experimental Studies On Habitat Preference And Thermoregulation Of Bufo Americanus, B. Hemiophrys And B. Cognatus, John R. Tester, A. Parker, Donald B. Siniff

Journal of the Minnesota Academy of Science

This paper reports on responses lo habitat and thermoregulotion exhibited by three species of toads, Bufo omericanus, B. hemiophrys and 8. cognalus, under artificial conditions. The response of the toads to sparse, medium, and dense vegetative cover was investigated by establishing artificial cover types in a sheet-metal enclosure. Each of the three species spent more time in the dense cover than i11 sparse or medium cover. A second experiment to determine if the toads would be attracted by odor to samples of mud, water, and vegetation from their respective ranges suggested that the toads moved randomly to the habitat samples. …

Cell Mitosis During Skin Wound Healing, Frank M. Noice

Journal of the Minnesota Academy of Science

It has been well documented that an open (incised) skin wound through the epidermis and into the underlying dermis, results in a rapid, within 24 hours, and abnormal rise in the epidermal mitotic rate. The mitotic rate may be more than ten times the normal maximum, and is highest among those cells closest to the wound edge and lowest, near the normal rate, about 1 mm. from the wound edge. The decreasing mitotic rate within 1 mm. of the wound edge holds quite constant regardless of the size of the open wound. The theoretical explanation of this situation is presented …

Nesting Habits Of The Soft-Shelled Turtles (Trionyx Sp.), Rory Neil Vose

Journal of the Minnesota Academy of Science

Soft-shelled turtles (Trionyx Sp.) are common along the Mississippi River but, in spite of their abundance, the literature contains very few accounts of their life history, particularly with respect to nesting. The principal contributions concerning the ecology of Trionyx have been made by Breckenridge (1944); Cahn (193 7); Carr (1952); Ditmars (1936); and Pope (1939 and 1955).

The present study was undertaken to learn more about the nesting habits of the Trionyx turtles in the area near Winona, Minnesota. Because of the great similarity between species of Trionyx turtles, and because close observation would have disturbed their normal nesting activities, …

Cedar Creek Natural History Area, 1963, William H. Marshall

Journal of the Minnesota Academy of Science

This paper is to inform members of the Minnesota Academy of Science and other citizens of the state as to the present status of the Cedar Creek Natural History Area. It is necessary for several reasons: first, as an opportunity to fully acquaint you with the contributions of the late Dr. Arthur N. Wilcox and Dean T. H. Fenske, and second, because we are entering a new phase in the evolution of the project.

Populations Of Peritrichs On The Pond Snail, Physa Gyrina Say, Peter Moyle

Journal of the Minnesota Academy of Science

There are many obscure niches in a, pond that make fascinating ecological studies. The shell of a pond snail such as Physa gyrina Say, is one of these. In this study alone, 18 species of attached animals and plants were found growing on P; gyrina shells. About half of these species occurred on the shells in large numbers and completed a large part of their life cycle there. On P. gyrina, the most abundant animals included three species of protowans and a tendipedid larva. The protozoan species, Epistylus niagarae Stokes, Opercularia ramosa Stokes, and V orticella campanula Ehrenberg all belong …

Circadian Periodic Changes In Relative Specific Activity Of Mouse Brain Phospholipids, Walter Nelson

Journal of the Minnesota Academy of Science

No abstract provided.

Role Of The White Sucker In Minnesota Waters, Donald E. Olson

Journal of the Minnesota Academy of Science

No abstract provided.

Murine Circadian Susceptibility-Resistance Cycle To Acetylcholine, Frank Jones, Erhard Haus, Franz Halberg

Journal of the Minnesota Academy of Science

The detection of a circadian ( about 24- hour) susceptibility-resistance cycle to acetylcholine by spot checks on mortality from this agent will be here presented. The study was done under conditions standardized to some extent for 24-hour routine-synchronized circadian system analysis ( 1). Sampling was limited to only two time points along the 24-hour scale. Hence, results represent a spot check rather than a circadian map. The conclusions to be drawn from these data have been confirmed, in the interim, with more frequent sampling. The data to be reported constitute further evidence that circadian system structure (2) involves significant and …

Distribution Of Mice Populations In The Winona Area, Roger Flattum

Journal of the Minnesota Academy of Science

Six mice habitats in Winona County, Minnesota, were censused by means of snap traps. Examples of marsh, dry meadow, and woods habitat in an upland environment were selected in East Burns Valley south of Winona. Corresponding habitats in a flood plain -environment were located on Prairie Island northwest of the city. These are representative of the non-agricultural habitats of Winona County.

A Description Of Castoroides Ohioensis From Minnesota, Bruce R. Erickson

Journal of the Minnesota Academy of Science

No abstract provided.

Food Habits Of The Young Gizzard Shad, George Pahl, Jerry Maurer

Journal of the Minnesota Academy of Science

In his 1920 paper, L. H. Tiffany states that the gizzard shad (Dorosoma cepedianum) offers for the game fish one of the most direct routes possible from manufacturer to consumer. In view of this conclusion, the research reported in this paper was undertaken for the purpose of determining (a) what foods are ingested by gizzard shad, and (b) if there is any correlation between food ingested and that available in greatest supply in the natural habitat. The study was centered in an area of the Mississippi River in the vicinity of Winona, Minnesota. Some additional work was done about thirty-five …

The Apparent Genetic Relationship Between Campaniform And Trichoid Sensilla On Drosophila Wings, Vern Sisson, Charles L. Hamrum, Arthur W. Glass

Journal of the Minnesota Academy of Science

No abstract provided.

A Review Of The Characters Used In Identification Of Minnesota Eristalis, Latreille (Diptera, Syrphidae), Charles L. Hamrum, Wayne A. Becker

Journal of the Minnesota Academy of Science

No abstract provided.

Evidence Of Amitosis In Mouse Liver, George Pahl, Michael Cummings

Journal of the Minnesota Academy of Science

No abstract provided.

Growth Study Of Young Gizzard Shad, George Pahl, Gordon Willfahrt

Journal of the Minnesota Academy of Science

This investigation was part of a general study aimed at shedding light upon the role of the gizzard shad (Dorosoma cepedianum) as a forage fish of certain game fish species. Recent changes in the populations of such game fish species as the walleye ( Stizastedion vitreum), northern pike ( Esox lucius) , and largemouth bass (Micropterus salmoides) in the upper Mississippi River suggest that the gizzard shad population might have an important bearing on the present situation. The purpose of this investigation was to study the growth rates of the gizzard shad in the Upper Mississippi River during their first …

Ecology Of Insect Swarms. Iii. Intraspecific Interference In The Swarms Of Anarete Sp. Near Felti Pritchard (Cecidomyiidae, Diptera), H. C. Chiang

Journal of the Minnesota Academy of Science

No abstract provided.

Campaniform Sensilla Patterns On The Wings Of Drosophila, Charles L. Hamrum, Arthur W. Glass, Vern Sisson

Journal of the Minnesota Academy of Science

Campaniform sensilla have been described from the wings, mouthparts, legs, and other parts of the insect body. These small sense organs were known under several terms until Berlese ( 1909) applied the term "campaniformi" because of their dome, or bell-shaped character. Numerous functions have been suggested for these organs which seem to be stress receptors of some sort. Very few attempts have been made to utilize these sensilla as taxonomic characters.

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.

Deer Studies At Camp Ripley, Minnesota, Bernard A. Fashingbauer

Journal of the Minnesota Academy of Science

The white-tailed deer has been studied by wildlife biologists throughout its range. Additional information is required for improved management of deer in Minnesota and elsewhere. With the permission and cooperation of military authorities, deer studies have been established within the seventy square mile Camp Ripley Military Reservation and State Game Refuge near Little Falls, Minnesota. The accessibility of the area, large deer population, and habitat conditions offered an excellent location for the proposed studies. In addition, the relatively complete control of hunter use of the Camp was a decided advantage in conducting big game research.

Some of the research work …

Progress Report On The Isolation Of Human Antibodies From Cattle Anti-Human Sera, Charles W. Anderson

Journal of the Minnesota Academy of Science

This progress report is concerned with the isolation, detection, and preparation of human antibodies from cattle anti-human sera and can be classified into the field of immunology which deals generally with the mechanisms by which living tissue reacts to foreign living or nonliving biological materials.

The Use Of Tree Rings To Date Beaver Colonies, J. Benton Kettleson

Journal of the Minnesota Academy of Science

In 1946, I began the periodic observation of several beaver colonies located near my family's summer cabin, in Crow Wing Co., central Minnesota. From 1953 to 1956, a detailed study of the colonies was conducted as a Junior Academy of Science project. During this period, several new colonies were established and many of the older ones abandoned. A study of aerial photographs, followed by a ground check on foot or by canoe, turned up many other beaver colonies, some active at the time of discovery and many apparently long deserted.

In searching for a method of ascertaining when these workings …

The Preparation Of Human Blood Typing Fluids From Cattle Normal And Immune Sera, W. H. Stone, Charles W. Anderson

Journal of the Minnesota Academy of Science

No abstract provided.

The Physiological Effects Of Strychnine And Electric Stimuli On Cyclops, Ralph J. Fricke

Journal of the Minnesota Academy of Science

Cyclops, the intermediate hosts of parasites of higher animal~, particularly some tapeworms of fish, waterfowl, and some mammals is a comparatively simply crustacean. From the following it should become apparent that the Cyclops is, in fact, very complex, exhibiting physiological reactions similar to those produced in the mammal. This study will include certain observations of the physiological effects of strychnine and electric stimuli on Cyclops. The animal lacks a heart. Body fluid is circulated as a result of the rhythmic movements of its gut. For the experiments a clone of the species Eueyclops agilis was established. In a clone, all …

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 …

The Cultural Isolation Of Flagellate Protozoal Parasites Of Insects, F. G. Wallace

Journal of the Minnesota Academy of Science

No abstract provided.

Variation In The Red Shiner, Notropis Lutrensis, (Baird And Girard), James C. Underhill

Journal of the Minnesota Academy of Science

No abstract provided.

Armyworm Moth (Pseudaletia Unipuncta) Flight In Duluth, Minn., H. C. Chiang

Journal of the Minnesota Academy of Science

No abstract provided.

Some Aspects Of The Ecology Of Axymyia Furcata Mcatee, Blanchard O. Krogstad

Journal of the Minnesota Academy of Science

No abstract provided.

A Life History Study Of The Yellowthroat, Geothlypis Trichas, P. B. Hofslund

Journal of the Minnesota Academy of Science

No abstract provided.