Life Sciences Commons^™

The Development Of The Endogenous Stages Of Eimeria Ninakohlyakimovae (Yakimoff And Rastegaieff, 1930) In Domestic Sheep, Richard S. Wacha

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Forty-five mixed breed lambs, 1 to 4 months of age, were used to study the patent period and endogenous stages in the life cycle of Eimeria ninakohlyakimovae. The lambs were inoculated with oocysts of this species and killed at daily intervals from 1 through 14 days after inoculation. From all lambs of the study sections of intestinal tissue were prepared by routine methods for histological examination.

E. ninakohlyakimovaewas observed to have 2 generations of schizonts in its endogenous development. Mature, first-generation schizonts had an average diameter of about 290 μ and had many thousands of merozoites, averaging 11.9 …

Drift Of Oligophlebodes Sigma And Baetis Bicaudatus In A Mountain Stream, William Dean Pearson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The objective of this study was to clarify the relationships between drift rates, population density, production rates, key environmental factors, and movements of adults within two populations of stream insects (a caddisfly--Oligophlebodes sigma and a mayfly--Baetis bicaudatus).

Samples of benthic invertebrates (424 total) were collected every 28 days at four stations on Temple Fork of the Logan River, Utah, from October, 1967 to September, 1969. Samples of drift invertebrates (181 total) were collected every 14 days at three stations on Temple Fork during the same period. During summer months (June-September) a day and a night drift sample …

Effects Of Starvation And Time At Stocking On Survival Of Stocked Rainbow Trout, Salmo Gairdneri, Marlin John Bricker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Investigations of effects of starvation and time at stocking on the survival of catchable rainbow trout in two areas of Mammoth Creek in Dixie National Forest, Utah, were conducted from May 24 to December 6, 1969. Fish were starved for 6 days and 1 day and stocked in the morning (5:40-7:00 a.m.) and in the afternoon (1:45-5:30 p.m.). Out of 7,000 tagged fish stocked, 4,751 tags were returned by fishermen. The 6-day starved fish, stocked in the morning returned to the creel in highest numbers (1,240); followed by 1-day starved, afternoon-stocked fish (1,194); 6-day starved, afternoon-stocked fish (1,163); and 1-day …

Reproduction And Growth Of The Tule Perch Hysterocarpus Traskii (Gibbons) With Notes On Its Ecology, David Scott Bundy

University of the Pacific Theses and Dissertations

This study was initiated to obtain information about the natural history of the tule perch before greater reduction in population has occurred. The studies of Hopkirk (1962) and Turner (1966) did not include information on reproduction, development, and growth of embryos within the ovarian sac, and the growth of the tule perch and, secondly, to supplement the work of Hopkirk and Turner concerning color variation and food habits.

The Lipid Composition Of The Egg Shell Of The Tick Rhipicephalus Sanguineus, Anthony F. Molinari

Master's Theses

No abstract provided.

The Butterflies Of Nebraska, Kurt Duane Johnson

Dissertations and Theses @ UNI

A ten-year study of the distribution and taxonomy of Nebraska butterflies was undertaken. Data were compiled through extensive collecting throughout the state together with examination of museum collections, private collections, and published records. One hundred and sixty-seven species were recorded from the state, but evidence indicates that the number of species in the fauna has decreased with time, with 18% of the fauna recorded only prior to 1960. Some forty typically-western montane taxa were found in the coniferous forests of western Nebraska, Several of these western species have extended their distributions eastward. In contrast, a few species with eastern and …

Studies On An Antibiotic-Producing Strain Of Bacillus Megaterium X, Kishori Madhukar Chaubal

University of the Pacific Theses and Dissertations

On July 10, 1968, while observing the effects of ultra-violet light on a plate culture of Sarcino lutea, o contaminant was found growing in the form of a colony surrounded by a clear zone of inhibition where S. lutea had failed to grow. A smear from this contaminant colony was found to contain a Gram positive, chain-ond spore-forming bacillus. The organism was isolated and its antagonism against S. lutea was reshocked. Preliminary investigation of its activity against other bacteria indicated that this activity was directed against 5. lutea only. I was decided to continue the investigations with two aims in …

A Study Of The Karyotype Of The Corixid, Krizousacorixa Femorata Guerin (Hemiptera-Corixidae), Maureen Marie. Kleba

Master's Theses

No abstract provided.

The Functional Morphology And Ecology Of Chone Mollis, Dale Brian Bonar

University of the Pacific Theses and Dissertations

Chone mollis occurs in large numbers in Tomales Bay and is an ecologically important infaunal member of the bay community. As with most marine communities, very little work has been done with individual species of the community. The present study of C. mollis is a contribution towards an understanding of the community as an ecological unit.

This study investigates the structure and function of the tube; tube-building habits; burrowing and locomotion; external anatomy; feeding; and internal anatomy of the muscular, skeletal, vascular, excretory, reproductive, and alimentary systems of C. mollis.

Observations On The Effects Of Aspirin On Cells In Vitro, Roger Scott Barron

University of the Pacific Theses and Dissertations

Numerous reports concerned with the effects of chemical agents (drugs) on animals, especially humans, have appeared in the literature over a period of centuries. Until very recently, however, the observations on which these reports were based have been rather general. The salicylates, for example, have been used and studied for many years yet investigations into their specific effects within living cells are minimal.

Of the several members of the salicylate group, the two that have gained widespread use in clinical practice are sodium salicylate and acetylsalicylic acid, commonly known as aspirin, the name of which was derived from the contraction …

Effects Of Temperature And Salinity On The Rate Of Oxygen Consumption Of Neomysis Intermedia (Czerniavsky), Margaret Ann Lutz

University of the Pacific Theses and Dissertations

The rate of oxygen consumption of an organisms is influenced by rush factors as temperature, activity, body rise, Salinity, and time of day (Prosser and Brown, 1961). Temperature andsalinity are considered to be the most important environmental l factor in the liver of aquatic invertebrates (Kaune, 1564). In general, aquatic invertebrates are thermo Comforters, and their ratio of metabolics and activity are decisively affected by water temperature. The capacity to regulate ray increase or decrease as a function of temperature, and it is usually greatest at a near-optimum temperature (Kinne, 1963).

Oxygen Uptake Of Excised Macoma Secta Gill Tissue, James Lee Balsley

University of the Pacific Theses and Dissertations

Macome secta has been reported along the western coast of North America from the Aleution Islands to Lower California (Packard, 1918), Indicating adaptation to a wide range of habitats. In the Dillon Beach ares, Racons secta is found in a well protected cover just inside. and to the cast of the mouth of Tomales Bay. All specimens collected for this project wore takan from one site on a mudflat near Lesson's Landing, approximately one mile south of the Pacific Marine Station, Dillon Beach California. The exact location of the collection site on the mudflat may be seen in the serial …

The Effect Of Photoperiod On The Gonads And Basophilic Adenohypophyseal Cells Of The Rough-Skinned Newt, Taricha Granulosa Granulosa, Paul Patton Coambs

University of the Pacific Theses and Dissertations

The function of light in the reproductive cycle in amphibians has not been extensively studied. However, Farner (1965) feels that the small amount of experimental evidence suggests that photoperiod may play a role in the testicular cycle of Rana esculenta. The purpose of this paper is to study the effect of light on the gonads and the gonadotropic hormone forming cells of the adenohypophysis in the newt Taricha granulosa granulosa.

The Ciliary Currents Associated With Feeding, Digestion, And Sediment Removal In Adula (Botula) Falcata Gould 1851 (Bivalvia, Mytilidae), Peter Vaughn Fankboner

University of the Pacific Theses and Dissertations

Adula (Botula) falcata Gould (Soot-Ryen, 1955) lives commonly as a byssally attached rock borer in soft mudstone reefs at Bolinas and Moss Beach, California (Figure 1). Keen (1963) reports that Adula falcata has been collected from the intertidal to a depth of ten fathoms. Its distribution is from Coos Bay, Oregon, to Cape San Lucas, Lower California (Hertlein and Strong, 1946), and collection data indicate a range as far south as Peru (Soot-Ryen, 1955).

While is possesses the protective advantage of living cryptically, Adula falcata is subjected to an environmental stress not faced by epifaunal mytillids; namely, it must function …

Reproductive Biology Of Thais Emarginata (Deshayes, 1839) And Thais Canaliculata (Dulcos, 1832), Roy Seamands Houston

University of the Pacific Theses and Dissertations

Thais emarginata (Deshayes, 1839) and Thais canaliculata (Dulcos, 1832), are two common Pacific coast gastropods (Family: Muricidae). T. emarginata is found in semi-protected rocky areas from Alaska to Baja California, while T. canaliaulata occurs in quiet bays from Alaska to Monterey Bay, California (Ricketts and Calvin, 1966). Both species occur on rocks and jetties where they can be seen feeding upon barnacles and young mussels. Despite the abundance of these species their reproductive biology has not been examined.

In the present study, the following aspects of the reproductive biology of T. emarginata and T. canalieulata are presented: Relationship of gonadal …

A Myological And Osteological Comparison Of The Pelvic Appendage Of The Male And Female Western Meadowlark, Thomas Felix Sourisseau Jr.

University of the Pacific Theses and Dissertations

Sexual dimorphism has been noted to exist in many genera of birds, but it is not until recently that papers have appeared which deal with the actual extent of sexual dimorphism and its possible adaptive significance. The papers of Rand (1952), Sibley (1957), Amadon (1959), and Selander (1966) hypothesize about the possible significance of sexual dimorphism in birds, and the papers of Kilham (1965), Selander (1965), Storer (1966), Ligon(1968), Ingolfsson (1969), and Verner and Willson (1969) examine the relationship between hypotheses on the significance of sexual dimorphism and actual field conditions. None of these papers deals with differences in bone …

The Development Of Behavior And The Ossification Of Bone In The Bantam-Chick Embryo, Christine M. Hagedorn

Dissertations and Theses @ UNI

The objectives of this study were (1) to establish an index of standard behavior, and (2) to establish an index of skeletal development for each day of embryonic development for the bantam-chick embryo. The principal method used was direct observation of the embryo. This was done by removing the shell from the blunt end of the egg and applying a coating of vaseline to the exposed inner-shell membrane. The bones observed in skeletal development were made visible by alizarin red S stain. Behavioral activities of the bantam-chick embryo included trunk movements, head lifting, head turning, wing movements, leg movements, jerking, …

Morphology And Development Of The Flowers Of Boottia Cordata, Ottelia Alismoides, And Their Synthetic Hybrid (Hydrocharitaceae), Robert B. Kaul

School of Biological Sciences: Faculty Publications

The inferior ovary of Boottia cordata, Ottelia alismoides, and their hybrid is appendicular in nature, the carpels are congenitally only slightly connate, and they are unsealed. All floral organs except the sepals originate from common primordia in the female and bisexual flowers. A flat residual floral apex is present. There is a vestigial superior ovary of three ontogeneticallv fused carpels in the male flower of Boottia cordata. The hybrid is intermediate in many characteristics and has partially fertile stamens and staminodia. The sequence of development in all flowers is acropetal. These plants appear to be related to …

Discrimination Reversal Learning As An Index Of Memory In Spermophilus Tridecemlineatus, Waneta Kay Coester

Biology ETDs

Spermophilus tridecemlineatus were trained to solve a simple visual discrimination problem. Following a 15-day non-training period the ground squirrels were trained on-a series of five discrimination reversal problems. Criterion and non-correction procedures were followed during original and reversal training. During the non-training period one half of the subjects (Group I) remained in the training laboratory and the remainder of the animals (Group II) hibernated.

It was possible to train the animals to solve the original discrimination and the reversal problems. No statistically significant differences were observed between performances on consecutive problems. However, differences approaching statistical significance were observed between performances …

The Effect Of Two Growth Retardant Chemicals, Cycocel And B-Nine, On Certain Nitrogeneous Components In Barley Seedlings, Linda Kinser

Masters Theses & Specialist Projects

Certain chemicals are known to inhibit growth in many plant species. These chemicals possess a common trait, the ability to inhibit stem elongation by suppressing the activity of the subapical meristematic region (11). These growth retardants have been extensively studied during the past several years in an effort to determine the biochemical mechanism responsible for reduction in plant height. The characteristic effect of these chemical retardants on the growth pattern has been described as producing plants with shorter, thicker stems and broader, darker green leaves. Tolbert, however, noted that although plants treated with the plant growth retardant, Cycocel, (2-chloroethyltrimethlammoniumchloride) and …

The Effect Of Photoperiod On The Diurnal Fluctuations In Photosynthetic Rate Of Two Species Of Marine Phytoplankton, Richard Allmon Smith

Master's Theses

Photosynthetic rates were measured under constant conditions over a 24 hour period for cultures of Skeletonema costatum and Amphidinium carterae grown under various light - dark regimes. Photosynthetic rate fluctuated for both species under all photoperiods except for A. carterase under 8 hours light per day. Maximum photosynthetic rates occurred generally in the middle of the. light period and minimum rates.in the middle of the dark period. The ratio of maximum to minimum rates, or Pmax/min, differed significantly under the various photoperiods. Pmax/min values . for A. carterae were significantly greater than for s. costatum. The greatest Pmax/min for S …

A Biological Investigation On Plethodon Larselli, Charles Oliver Holmes

All Master's Theses

The purpose of this study is to increase the presently-lacking biological knowledge of P. larselli. A study was made, therefore, on this species relative to its geographical distribution, habitat, dehydration and rehydration rates, response to induction with varying concentrations of a gonadotropic hormone, and blood serum analysis by cellulose acetate electrophoresis. In addition, the findings of this investigation will help elucidate the relationship between P. larselli and P. vehiculum.

Food Habits Of Dicamptodon Ensatus And Associated Fish Species Of Maratta Creek, Washington, Authur L. Antonelli

All Master's Theses

Three cold-blooded vertebrates, Dicamptodon ensatus, Cottus tenuis, and Salmo gairdneri were investigated as to food habits for a period of one year. The existence of competition between these animals for food was determined by means of stomach analysis. The results were compared relative to each vertebrate and the bottom fauna procurred from the stream. It was shown that the food habits of D. ensatus and S. gairdneri were diverse enough to warrant partial exclusion on the basis of food. C. tenuis demonstrated selectivity and was shown to be under competitive stress from the other two species.

The Effects Of Herbicides On Three Soil Inhabiting Blue Green Algal Species, Lee C. Darlington

All Master's Theses

The object of this study was to examine the effects of varying concentrations of 2, 4-D, Dalapon, and Tordon on the growth of several nitrogen-fixing blue-green algal species obtained from soil samples and grown under culture conditions in the laboratory.

A Preliminary Investigation Of The Incidence Of Acanthocephalans In Freshwater Fish From Two Similar Streams In Rowan County, Kentucky, Langston D. Smith

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Langston D. Smith on July 23, 1969.

The Food Habits Of The Gila Mountain-Sucker, Pantosteus Clarki (Baird And Girard), Gail C. Kobetich

Biology ETDs

Intestinal contents of postlarval to adult Gila mountain-suckers, Pantosteus clarki (Baird and Girard), collected from the upper Gila River system, were examined using a slightly modified Sedgewick-Rafter counting technique. From the analysis of the intestinal material it was found that the diet of Pantosteus clarki consisted of 97.4% plant material, 2.4% animal material, and 0.2% organic detritus. In order of importance the plant material consisted of filamentous green algae, filamentous blue-green algae, and diatoms. The animal material consisted of aquatic invertebrates with the following groups being most important: Tendipedidae, Epherneroptera, Simuliidae, and Pyralididae. Other algal types and invertebrates groups occurred …

A Comparison Of The Vibratory Muscle, Tail Epaxial Muscle, And Body Epaxial Muscle Respiratory Activities In Sistrurus Miliarius, Coluber Constrictor, And Natrix Fasciata, Craig Todd Kerins

Master's Theses

The rattlesnake can be distinguished from other types of snakes by its rattling apparatus. Klauber (1956) describes the rattle as an apparatus consisting of varying numbers of three lobed keratin segments. The segments arc arranged in a string by the loose interlocking of the segment lobes. The rattle is attached to tho. snake by the style, the modified terminal vertebra of the rattlesnake. The style is distally branched, forming a rigid core for the proximal rattle segments. A sound, unique to the rattlesnake, is produced when the segments arc vibrated at great frequencies by the snake's posterior tail musculature (Klauber, …

The Effect Of Estradiol On Protein And Nucleic Acids Of The Liver Of Natrix Fasciata, Alex Jordan

Master's Theses

The effects of estradiol on RNA, DNA, and protein concentrations in the liver of Natrix fasciata (southern banded water snake) were investigated. Nucleic acid and protein concentrations were determined spectrophotometrically and expressed as mg/gm wet weight tissue.

Significant increases in both RNA and protein occured 48 hours after a single injection of estradiol. After 72 hours the mean RNA level in estradiol treated snakes had decreased significantly from the 48 hour level. The mean protein level at 72 hours, although lower than the 48 hour level, did not decrease significantly.

Liver DNA concentrations in experimental and control snakes were the …

Effects Of Photoperiod On The Occurrence Of Symbiotic Rotifers, Nematodes And Branchiobdellids Of Two Orconectid Species Of Crayfishes, Edward Van Metre

Masters Theses & Specialist Projects

Representative specimens of O. immunis and O. pellucidus were brought to the laboratory in order to investigate the influence of light on the occurrence of the symbionts encountered during the preliminary field study. After one week of acclimating the crayfishes they were distributed among environments control chambers that permitted exposure of the hosts and symbionts to 1) continuous light (C.L.), 2) a daily cycle of 12 hours of light and 12 hours of darkness (12L-12D) and 3) continuous darkness (C.D.).

Habitat And Food Habits Of Eutamias Minimus Scrutator In The Semi-Desert Regions Of Central Washington, Gary L. Hall

All Master's Theses

This paper presents the results of a food habit study on Eutamias minimus scrutator in the sagebrush-bunch grass zone of Central Washington. The major objective of the research is to relate the availability of plant species within the local habitat to the food habit biology of the species.