Digital Commons Network^™

Identifying And Predicting Rat Behavior Using Neural Networks, Jonathan A. Gettner

Master's Theses

The hippocampus is known to play a critical role in episodic memory function. Understanding the relation between electrophysiological activity in a rat hippocampus and rat behavior may be helpful in studying pathological diseases that corrupt electrical signaling in the hippocampus, such as Parkinson’s and Alzheimer’s. Additionally, having a method to interpret rat behaviors from neural activity may help in understanding the dynamics of rat neural activity that are associated with certain identified behaviors.

In this thesis, neural networks are used as a black-box model to map electrophysiological data, representative of an ensemble of neurons in the hippocampus, to a T-maze, …

Two-Phase Anaerobic Digestion To Reduce The Nox Emission Potential Of Biogas, Nathaniel Manuel Olivas

Master's Theses

Anaerobic digestion can be used to decrease the mass of organic wastes to be disposed of while producing useful biogas (CH₄ and CO₂) for heat or power production, but in air basins with strict emissions limits, biogas combustion is difficult to implement due to the high costs of controlling NOx emissions. NOx production can be minimized by blending H₂ gas with CH₄ at a volume ratio of 15:85 H₂:CH₄, which allows burning at ultra-lean air-to-fuel ratios. For biogas systems, a potential low-cost NOx control strategy is to produce H₂-CH …

Predicting Invasive Range Of Eucalyptus Globulus In California, Anthony J. Lopez

Master's Theses

Eucalyptus globulus is the subject of intense debate in California. Its invasive potential, aggressive growth, reproductive biology, and association with fire make the prediction of spread important in California. Two modeling simulations, Climex and Maxent, will illustrate the distribution and potential growth range of E. globulus in California based on climate and presence. Modeling the potential range of growth will predict invasive spread. The anticipated result is the continued spread of E. globulus in coastal regions with adequate moisture and suitable climate. Predicting the range of E. globulus in California dictates management strategy and is key for preventing further introduction, …

The Effects Of Foliar Nutrient Applications On Split, Yield, And Internal Fruit Quality Of 'Wonderful' Pomegranate (Punica Granatum L.), John Matthew Chater

Master's Theses

Fruit split is the most important physiological disorder in pomegranate production, causing devastating crop losses worldwide. Foliar nutrient applications have been used experimentally to mitigate pomegranate fruit split but none have been conducted using the industry standard cultivar, Wonderful, and little is known about the effects of foliar nutrient applications on pomegranate. Additionally, investigations into putative health benefits of pomegranate fruit have increased interest in its production but limited evidence exists regarding effects of agricultural practices such as foliar fertilizer applications on internal fruit quality. ‘Wonderful’ pomegranate trees at 2 commercial orchards were treated with foliar applications of ZnSO_{4 …}

Rights, Solidarity, And The Animal Welfare State, Jes L. Harfeld

Between the Species

This article argues that aspects of the animal rights view can be constructively modulated through a communitarian approach and come to promote animal welfare through the social contexts of expanded caring communities. The Nordic welfare state is presented as a conceivable caring community within which animals could be viewed and treated appropriately as co-citizens with solidarity based rights and duties.

Executive Committee - Agenda, 11/10/2015, Academic Senate

Academic Senate Agendas

No abstract provided.

Review Of Jean-Christophe Bailly, The Animal Side, Chandler D. Rogers

Between the Species

No abstract provided.

Fruit And Vegetable Consumption Of College Students: What Is The Role Of Food Culture?, Christiane Schroeter, Lisa A. House

Agribusiness

Our primary objective is to assess the role of culture by linking college students’ current consumption of fruits and vegetables with their produce consumption levels while with family. Using a Tobit model, we analyzed data from an online survey with college students. Family consumption of fruits was highly predictive of the individual’s consumption of fruits. For each unit increase in the reported consumption of fruits (vegetables) with the family, the respondents’ fruit (vegetable) consumption at school increased by 0.65 (0.30) units compared to the base consumption level of 1.95 (1.82) times of fruit intake per day.

Lyme Disease Ecology In San Luis Obispo County: The Role Of The Western Gray Squirrel, Ryan William Baker-Branstetter

Master's Theses

Despite the fact that eight cases of Lyme disease were diagnosed in San Luis Obispo County between 2005-2013, the identity of wildlife hosts serving as sources for tick infection in this region remained unidentified. The primary cause of Lyme disease in the U.S. is the spirochetal bacterium Borrelia burgdorferi sensu stricto, and this agent had not been previously isolated from the region. Borrelia bissettii, a related species that has not been implicated as a common causative agent of Lyme disease, was isolated in small rodents inhabiting coastal scrub and chaparral habitats in a previous San Luis Obispo County study. However, …

Modeling Viscoelastic Behavior In Compact Bone Through A Distribution Of Collagen D-Spacing: A Finite Element Analysis, Christopher Ha

Master's Theses

Osteoporosis affects nearly 54 million people in the United States. The cost associated with treatment is estimated to be $19 billion per year and is expected to grow yearly. D-spacing is the staggering of collagen molecules found at the nanoscopic level. Previously thought to have a constant value, recent studies have found that D-spacing has a distribution of values throughout the tissue. As part of an ongoing effort in understanding the mechanisms that are affected by osteoporosis, a finite element model was developed to explore the effects of D-spacing distribution on the viscoelastic material properties of bone tissue. The goal …

Executive Committee - Agenda, 10/13/2015, Academic Senate

Academic Senate Agendas

No abstract provided.

Animals And Causal Impotence: A Deontological View, Blake Hereth

Between the Species

In animal ethics, some ethicists such as Peter Singer argue that we ought not to purchase animal products because doing so causally contributes to unnecessary suffering. Others, such as Russ Shafer-Landau, counter that where such unnecessary suffering is not causally dependent on one’s causal contributions, there is no duty to refrain from purchasing animal products, even if the process by which those products are produced is morally abhorrent. I argue that there are at least two plausible principles which ground the wrongness of purchasing animal products produced by morally abhorrent means. First, respect for the wishes and dignity of animals …

Mapping The Movement Of Overwintering Western Monarch Butterflies (Danaus Plexippus) At The Pismo Beach Monarch Butterfly Grove Using Arcgis Software, Brett Johnson, Jesse Wycko, Daniel Goldthwaite, Tyler Brown

Symposium

Dr. Villablanca of the Cal Poly Biology Department commissioned this project with the goal of tracking Monarch Butterfly spatial redistribution in anticipation of or response to severe weather events. We believe that Monarchs cluster non-preferentially on introduced Eucalyptus trees until midwinter when they begin to cluster preferentially on native conifers. Based on the efforts of a previous group of students, it has been deter- mined that, over a two-week time period in mid-winter, Monarchs spend the majority of their time on native conifers. We set out to clearly demonstrate Monarch Butterfly spatial redistribution in either anticipation of or response to …

Observational Learning In Eusocial Insects: Chemical Transmission Of Information Between Rival Colonies Of Leafcutter Ants, Avity Norman

Symposium

Like other ants (Hymenoptera, Formicidae), leafcutter ants of the genus Atta use chemical signals, including airborne pheromones and cuticular hydrocarbons, to coordinate extraordinarily complex eusocial organization. This genus is ecologically and economically important because of its extreme impact on vegetation throughout the Neotropics, and also lends itself well to ethological research because of its easily observed and manipulated foraging behavior. Saverschek et al. (2010) used fungicide-treated leaves to induce an avoidance response to certain types of leaves, demonstrating that colonies of Atta columbica are capable of experiential learning and long-term memory. The proposed study will use similar methods to determine …

Protocols For Cleaning And Articulating Large Mammal Skeleton, Brandon Rowley

Symposium

This protocol will refer to Panthera tigris as an example for each cleaning method and articulation because that was the organism subject to this procedure. However, the processes and methods discussed here can be used as reference for any large mammal. The key is to make sure the skeleton is clean, which entails removing the meat from the bones, degreasing, and whitening. Once this is done, articulation can begin. The protocol is divided into three major sections: cleaning the skeleton, whitening and degreasing, and articulation. The cleaning section contains three contemporary methods for removing tissue. Each method can be performed …

Size And Abundance Of Pismo Clams In The Intertidal And Subtidal, Jenny Greene

Symposium

Pismo clams, Tivela stultorum, were observed at Rincon Beach, CA to find patterns of abundance and size distribution along a depth gradient from the intertidal, where recreational clammers have access on foot, to the subtidal, where clammers only have access with more specialized snorkeling or SCUBA equipment. Size and abundance patterns were compared between the intertidal and subtidal regions. A heuristic model was created to predict the effects of predation and wave action on clam density. Clam abundance was significantly greater in the intertidal than the subtidal and displayed a Gaussian distribution across the entire distance sampled. While Pismo clam …

Book Review: Loving Animals By Kathy Rudy, Nancy Williams

Between the Species

No abstract provided.

Aged 539 Jennifer Potterton, Jennifer R. Potterton

Agricultural Education: Graduate Internship Reports

Internship Report in Ag Education

An Invasive Grass And A Desert Adapted Rodent: Is There An Effect On Locomotory Performance And Is It Modified By Prior Experience Or Familiarization?, Camille D. Boag

Master's Theses

Kangaroo rats (Dipodomys spp.) are frequently characterized as keystone species for their role in altering soil characteristics, changing habitat structure through seed consumption and dispersal, and being important primary consumers in their ecosystem. They are arid adapted and known to forage in areas with sparse vegetation. Studies suggests densely vegetated habitat to be unsuitable for kangaroo rats because plants are an impediment to their locomotion and predator avoidance behaviors. This study focuses on an invasive grass, South African Veldt (Ehrharta calycina), that converts landscapes with sparse vegetation into dense grassland habitats, and the Lompoc kangaroo rat …

Effects Of Supplemental Hydration On Physiology And Behavior Of Northern Pacific Rattlesnakes (Crotalus Oreganus Oreganus), Griffin D. Capehart

Master's Theses

Hydration is a critical element for many physiological processes in vertebrates, such as protein production, innate immunity, and behavioral processes such as daily activity and thermoregulation. Few studies have directly assessed the effect of hydration on these animals in nature. While it seems intuitive that drought is stressful to animals, studies examining drought are typically observational and fail to assess how the hydration state of these animals influences their physiology and behavior. We tested for an effect of hydration on several physiological and behavioral parameters in Northern Pacific rattlesnakes (Crotalus oreganus oreganus) by experimentally manipulating hydration levels in …

Wild-But-Not-Too-Wild Animals: Challenging Goldilocks Standards In Rewilding, Erica Von Essen, Michael P. Allen

Between the Species

Rewilding is positioned as ‘post’-conservation through its emphasis on unleashing the autonomy of natural processes. In this paper, we argue that the autonomy of nature rhetoric in rewilding is challenged by human interventions. Instead of joining critique toward the ‘managed wilderness’ approach of rewilding, however, we examine the injustices this entails for keystone species. Reintroduction case studies demonstrate how arbitrary standards for wildness are imposed on these animals as they do their assigned duty to rehabilitate ecosystems. These ‘Goldilocks’ standards are predicated on aesthetic values that sanction interventions inconsistent with the premise of animal sovereignty. These include culling, relocations and …

Book Review: Issa And The Meaning Of Animals: A Buddhist Poet’S Perspective By David G. Lanoue, Lisa Kemmerer

Between the Species

No abstract provided.

Executive Committee - Agenda, 9/22/2015, Academic Senate

Academic Senate Agendas

No abstract provided.

Animal Experimentation As A Form Of Rescue, Alexander Zambrano Mr.

Between the Species

In this paper I explore a new approach to the ethics of animal experimentation by conceiving of it as a form of rescue. The notion of rescue, I suggest, involves some moral agent(s) performing an action or series of actions, whose end is to prevent or alleviate serious harm to another party, harm that otherwise would have occurred or would have continued to occur, had that moral agent not intervened. Animal experiments that are utilized as a means to alleviate human illnesses mirror the structure of rescue cases and this means that we can and should apply principles of rescue …

Culturally Speaking: Beyond The Dairy Case: Cultured Products As Food Ingredients, Phillip Tong

Dairy Science

No abstract provided.

Demographics And Transfer Of Escherichia Coli Within Bos Taurus Populations, Joshua Ryan Dillard

Master's Theses

In the United States, symptoms caused by pathogenic strains of Escherichia coli are on the rise. A major source of these pathogenic strains is the E. coli in the digestive tract of cattle. The purpose of this project was to determine if E. coli are transferred between individuals of the same species and if interspecies transmission is possible. Proximity of cattle was also studied as a contributing factor to the transfer of E. coli. To accomplish this goal, E. coli isolates from cattle and cohabitating ground squirrels were compared through a new method of bacterial strain typing called pyroprinting. …

Effects Of Testosterone On The Spatial Ecology, Coloration, And Brain Regions In Western Fence Lizards, Sceloporus Occidentalis, Rachel Catharine Wilson

Master's Theses

An organism’s spatial ecology allows for access to essential resources such as food, mates, and escape from predators. Home range size, or the total area an organism inhabits, varies in relation to numerous factors including seasonality. During the breeding season, home range size increases in males across taxa. In addition, males usually also have larger home range sizes than females. This implicates testosterone (T) as a possible mediator of this relationship. Indeed, T causes an increase in home range size of males in numerous species of lizards. In addition to T causing an increase in home range size, it also …

Rfid Microscope Lab, Patricia Carranza

Computer Engineering

The RFID Microscope Lab is a new exhibit created for the San Luis Obispo Children's Museum. The goal of the project is to create a modern, interactive exhibit that will teach children about different natural specimens through the use of technology. A computer, custom software, and RFID technology, will be used to display facts, microscopic images, and short videos of ten different specimens.

The Effects Of Massage On Perceived Physical Soreness, Pain And Markers Of Inflammation Following High Intensity Unaccustomed Exercise, Courtney Lynn Crow

Master's Theses

Massage is often recommended to athletes to facilitate recovery and attenuate DOMS. The purpose of this study was to investigate the effects of massage on perceived muscle soreness and pain, inflammatory and immune markers, ROM, and mood state. Fourteen, recreationally active, women participated in a randomized crossover design study, consisting of 1) 60 min. full body massage following unaccustomed exercise and 2) 60 min. of rest. following unaccustomed exercise. Perceived muscle soreness and pain, active range of motion (ROM), mood state, along with blood concentrations of interleukin-6 (IL-6), C-reactive protein (CRP), creatine kinase (CK), and neutrophil count (NC), was assessed …

Multi-Stress Proteomics: The Global Protein Response To Multiple Environmental Stressors In The Porcelain Crab Petrolisthes Cinctipes, Michael A. Garland

Master's Theses

Global climate change is increasing the number of hot days along the California coast as well as increasing the incidence of off-shore upwelling events that lower the pH of intertidal seawater; thus, intertidal organisms are experiencing an increase in more than one stress simultaneously. This study seeks to characterize the global protein response of the eurythermal porcelain crab Petrolisthes cinctipes to changes in thermal, pH, and tidal regime treatments, either combined or individually. The first experiment examined temperature stress alone and sought to determine the effect of chronic temperature acclimation on the acute heat shock response. We compared the proteomic …