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Zoology

Eastern Illinois University

1976

Articles 1 - 5 of 5

Full-Text Articles in Life Sciences

The Effect Of Social Rank Of Male Swordtails (Xiphophorus Helleri) On Sexual Behavior, Janet N. Marum Jan 1976

The Effect Of Social Rank Of Male Swordtails (Xiphophorus Helleri) On Sexual Behavior, Janet N. Marum

Masters Theses

The relationship between social rank and sexual behavior of the male swordtail (Xiphophorus helleri) was studied. Initially three tanks were established with three males and two females in each. Social rank, aggressive and sexual levels were recorded by observation of the interactions which occurred in the tanks. A second series of observations were made with the fish regrouped according to their initial rank, that is, dominant males grouped together, middle ranking males together and the lowest ranking males together. Aggressive and sexual levels were the highest for the highest ranking males in all tanks and in both trials, although the ...


A Comparison Of Age And Growth Of Largemouth Bass (Micropterus Salmoides) In Two Ponds In East-Central Illinois, Mark Fevold Nelson Jan 1976

A Comparison Of Age And Growth Of Largemouth Bass (Micropterus Salmoides) In Two Ponds In East-Central Illinois, Mark Fevold Nelson

Masters Theses

No abstract provided.


Land Snail Diversity At Rocky Branch Nature Preserve, Clark County, Illinois, Daniel J. Mott Jan 1976

Land Snail Diversity At Rocky Branch Nature Preserve, Clark County, Illinois, Daniel J. Mott

Masters Theses

Terrestrial, shell-bearing gastropods were collected at Rocky Branch Nature Preserve, Clark County, Illinois. A total of three hundred nineteen specimens were collected representing five families and fifteen species. Two species of the family Endodontidae, eight species of the family Polygyridae, three species of the family Zonitidae, and one species in each of the families Pupillidae and Succineidae were collected.

In addition, an attempt was made to find the relationship between species diversity and dominant woody vegetation and soil quality. The land at Rocky Branch Nature Preserve ranges from lowland flood plain to high second growth forest. The dominant trees of ...


Ecological Comparisons Of Four Plethodontid Salamanders In A Ravine In West Central Indiana, Stephen L. Reinbold Jan 1976

Ecological Comparisons Of Four Plethodontid Salamanders In A Ravine In West Central Indiana, Stephen L. Reinbold

Masters Theses

No abstract provided.


The Arthropod Ectosymbionts Of The Fox Squirrel In Coles County, Illinois, Jeanine L. Stanis Jan 1976

The Arthropod Ectosymbionts Of The Fox Squirrel In Coles County, Illinois, Jeanine L. Stanis

Masters Theses

The body surface areas of 18 squirrels (Sciurus niger) were calculated by regions, and the numbers and densities of the ectoparasite populations present on each region determined. Four species representing four genera of arthropods were recovered. The louse, Neohaematopinus antennatus was the most abundant organism with Orchopeas howardii, Haemagamasus reidi, and Dermacentor variabilis being also present. The average population density of all parasite species combined was highest on the back and decreased on the belly, tail, legs, and the head respectively. Body regions showing greatest average total population densities were different for males and females. The females were found to ...