Life Sciences Commons^™

A Biosystematic Study Of Allium Amplectens Torr, Vickie Lynn Cain

University of the Pacific Theses and Dissertations

This investigation attempts to verify the identification of the anthocyanin in A. amplectens by spectral means. An attempt was also made to identify the sugars, and possibly their locations on the heterocyclic ring system, of the anthocyanins.

Fitness Theory And Aspects Of Behavioral Ecology In Two Sympatric Pacurus Species At Dillon Beach, California : Decapoda, Anomura), John Erickson Warner

University of the Pacific Theses and Dissertations

In the present study, aspects of the behavior and ecology of two sympathetic intertidal hermit crabs, Pagurus hirsutiusculus and Pagurus samuelis were studied with the intention of expanding the use of fitness set analysis to other species, particularly extending studies over the entire breeding season.

Flowering Plants Of Omega Mine, Table Mountain, Tuolumne County, California, Mary Wilcox

University of the Pacific Theses and Dissertations

The flora of California has been studied as a whole, but with the exception of Yosemite Valley few specific areas in Tuolumne County have been investigated.

The area chosen for this investigation was approximately forty acres of the lava flow known as Table Mountain. This forty acres is located in the southeast portion of the Omega Mine near Rawhide Flat, Tuolumne County, California. The decision to use this area for study was based on its relative freedom from man's influence and its accessibility. The Omega Vine belongs to the author and its use was restricted during the period of investigation

Population Ecology Of The Littoral Fringe Gastropod Littorina Planaxis In Northern California, Russell James Schmitt

University of the Pacific Theses and Dissertations

Life history patterns of individual organisms are the result of natural selection and should be correlated with particular physical and biological characteristics of habitats in which they live. The littoral fringe is known to be the most severe physical habitat in the intertidal zone, and it is expected that organisms in it should have population characteristics associated with selective response to physical adversity rather than biological interaction. Ecological studies of populations of Littorina planaxis were made in the Dillon Beach and Bodega Head areas. The study localities differed principally in extent of wave exposure rather than geographical location.

Effects Of Unilateral Ablation Of The Optic Nerve In Feral Mus Musculus, Otha Ray Rains Jr.

University of the Pacific Theses and Dissertations

The general organization and 'function of the vertebrate visual system has been under Investigation since the late nineteenth century (Gudden, lS7Qa, Gudden, 1870b). The organization of optic tracts and subcortical optic centers for the majority of vertebrates studied are found to be similar in both structure and function (Gudden, 1870a, Gudden, 1870b, Minkowski, 1913» Minkowski, 1920, and Lashley, 193^a). The sense organ, the eye, contains specific photoreceptor cells designated as either retinal rods or retinal cones. These two types of retinal cells possess an ability to convert light quanta into nerve impulses. The nerve impulses are transmitted via the optic …

Effect Of Thermal Stress On Larvae Of Patiria Miniata (Brandt) Including Studies On Induction Of Spawning, Development And Larval Tagging, Kenneth A. Simon

University of the Pacific Theses and Dissertations

It has been estimated by the Department of the Interior that by 1985 nearly one-quarter of all surface water in the United States will be used in removal of waste heat produced in electric generation. This will involve subjecting tremendous quantities of plankton to rapid fluctuations in temperature. The biological effect of such treatment on primary productivity and composition of zooplankton populations is not fully understood. To date little published information is available on the effect of rapid temperature fluctuations on plankton. Such temperatures are the result of heat exchange found in the cooling system of a steam-generating electric station. …

The Effects Of Effort And Day Of Exposure On Imprinting, Jean Elizabeth Van Dyke

University of the Pacific Theses and Dissertations

24 pairs of newly-hatched Leghorn chicks were randomly divided into 3 groups. Ss in one group followed a moving object for 30 min on Day 1 of life; Ss in another group followed for 30 min on Day 2; Ss in the remaining group followed for 15 min on Day 1 and 15 min on Day 2. One S in each pair followed by his own effort, while the other S rode behind the object in a transparent box. On Day 4, Ss were tested for the duration of following of the object. No important differences among groups were observed. …

Parasites Of Fishes From The San Joaquin Delta, Gary Herndon Hensley

University of the Pacific Theses and Dissertations

The purpose of the present study was to extend previous parasitological investigations of the San Joaquin area fishes. This study did not deal with a specific group of fish or parasite, but rather all groups of fishes and parasites encountered. As the amount of work done in California has not been extensive, more research will contribute to our understanding of these fishes and their parasites.

A Method Of Detecting Reaction To Environmental Influence By Recording Circadian Activity, Using The Flagfish Jordanella Floridae, Robert Matsuo Kano

University of the Pacific Theses and Dissertations

This paper investigates a means of detecting the reaction of aquatic vertebrates to environmental change by recording behavioral patterns within the diurnal activity. An apparatus measuring the activity of Jordanella floridae, Goode and Bean, using a photoelectric sensor system is described. Individual sensors monitored specific areas of the test aquarium that had special significance to the fish in the way of a particular behavioral category. An event recorder documented the breakage of light beams, giving continuous and accurately timed data of activity. Two distinct patterns of activity were recognized; a control, or typical, pattern, and a pattern resulting from the …

A Quantitative Study Of The Water Quality And Plankton Of Upper Blue Lake, Lower Blue Lake, And The Oaks Arm Of Clear Lake In Lake County, California, Stephen Patrick Hayes

University of the Pacific Theses and Dissertations

This study was undertaken to examine any possible associations between the measurements of water quality and lake conditions, and the quantity and composition of plankton present in Upper Blue Lake, Lower Blue Lake, and the Oaks Arm of Clear Lake during the sampling period. A secondary objective of this study was to provide a record of these measurements. These measurements, when taken collectively, are important indicators of the trophic state or nutrient condition of the waters of the three lakes from February through October 1972.