Life Sciences Commons^™

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.

Developmental Changes In Organ Systems Of Transforming Anuran Larvae, Muriel Humphrey Marshall

University of the Pacific Theses and Dissertations

Despite an enormous amount of information on the biochemical and physiological changes of amphibian metamorphosis, information about the general anatomy of anuran larvae is not readily available. The present study is a comparison of the general morphological changes during metamorphic climax of three anuran species belonging to three different families. This anatomical information is designed to assist those wishing to correlate cellular and chemical events with the corresponding morphological events.

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 …

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 …

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).

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 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 …

Immunodiffusion And Immunoelectrophoretic Studies On Trypanosoma Lewisi (Kent) During The Course Of An Infection In The Albino Rat, Rattus Rattus, Carol Louise Perkins Drew

University of the Pacific Theses and Dissertations

Immunoelectrophoresis revealed an antigen-antibody response between 4 day metabolic products and 8, 12 and 16 day sera and between 4 day trypanosomal extract and 16 day serum.

Metabolic products from trypanosomes incubated at room temperature do not appear to be antigenic.

The limitations of immunodiffusion are discussed in reference to the results. It is suggested that some of the antibodies to metabolic products may be of the precipitating type while others are not.

Since a faint reaction also occurred between 4 day trypanosomal extract and 16 day serum, it may be concluded that metabolic products contribute to only a portion …

Biological Studies Of Bimeria Franciscana (Hydrozoa: Gymnoblastea) From The Petaluma River, California, Jose Rigoberto Gomez

University of the Pacific Theses and Dissertations

The athecate hydroid Bimeria franciscana Torrey has been found in estuarine habitats throughout the world. For this study B. franciscana was collected along the docks of the Petaluma River, California, a new collection site. Investigations on the appearance and biology of this hydroid have not been recorded in this area, perhaps because of its relative rarity along the river

Distribution records and synonymy of B. franciscana as well as general taxonomic characteristics of the species of the Genus Bimeria present on the west coast of the United States are assembled in a series of appendices added to this work. This …

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.

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 …