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Articles 1 - 30 of 131
Full-Text Articles in Life Sciences
Reproductive Success Of American Kestrels (Falco Sparverius) Nesting In Boxes Along An Interstate In Northeastern Tennessee., Jennifer Robertson Powers
Reproductive Success Of American Kestrels (Falco Sparverius) Nesting In Boxes Along An Interstate In Northeastern Tennessee., Jennifer Robertson Powers
Electronic Theses and Dissertations
Nest box programs provide supplemental nest sites for American Kestrels, Falco sparverius. When the availability of nest sites is a limiting factor, the addition of nest boxes can increase local breeding populations. These programs also facilitate the collection of data on breeding kestrels.
This study focuses on an American Kestrel (Falco sparverius) nest box trail along Interstate 26 in northeastern Tennessee during the breeding seasons of 1998, 1999, 2000, 2003, 2004, 2006, and 2009. Productivity measures and reproductive success of nesting birds are provided and compared to other programs. The data are analyzed across years and by …
Influence Of Soil Water Repellency On Post-Fire Revegetation Success And Management Techniques To Improve Establishment Of Desired Species, Matthew D. Madsen
Influence Of Soil Water Repellency On Post-Fire Revegetation Success And Management Techniques To Improve Establishment Of Desired Species, Matthew D. Madsen
Theses and Dissertations
The influence of soil water repellency (WR) on vegetation recovery after a fire is poorly understood. This dissertation presents strategies to broaden opportunities for enhanced post-fire rangeland restoration and monitoring of burned piñon and juniper (P-J) woodlands by: 1) mapping the extent and severity of critical and subcritical WR, 2) determining the influence of WR on soil ecohydrologic properties and revegetation success, and 3) evaluating the suitability of a wetting agent composed of alkylpolyglycoside-ethylene oxide/propylene oxide block copolymers as a post-fire restoration tool for ameliorating the effects of soil WR and increasing seedling establishment. Results indicate that:
• Post-fire patterns …
Ecophysiological Mechanisms Underlying Aspen To Conifer Succession, William J. Calder
Ecophysiological Mechanisms Underlying Aspen To Conifer Succession, William J. Calder
Theses and Dissertations
This thesis includes three studies. The first study examined how reductions in light availability and changes in soil chemistry that occur as conifers establish in aspen stands, differentially affects the regeneration success of aspen and conifers. We found that aspen were more sensitive to changes in light and soil then subalpine fir. For aspen, reduced light and conifer influenced soils significantly reduced height, biomass, photosynthesis and the production of secondary defense compounds. Subalpine fir seedlings were significantly reduced in photosynthesis, biomass and R:S under lower light conditions but showed no differences in physiology or growth when grown on the contrasting …
Genetic Dissection Of Triterpenoid Saponin Production In Chenopodium Quinoa Using Microarray Analysis, Derrick James Reynolds
Genetic Dissection Of Triterpenoid Saponin Production In Chenopodium Quinoa Using Microarray Analysis, Derrick James Reynolds
Theses and Dissertations
Quinoa (Chenopodium quinoa Willd.) is an important food crop for subsistence farmers in the Altiplano (high plains) of Peru, Bolivia, and Argentina. Saponins are part of a diverse family of secondary metabolites that are found in high concentrations in the pericarp of many varieties of quinoa. Due to their bitter taste and anti-nutritive properties, saponins must be removed before the quinoa grain is consumed. There are ‘sweet’ varieties of quinoa that have significantly reduced levels of saponin. Previous research suggests saponin production is controlled by a single locus. The major objective of this research was to elucidate the genetic …
Relationship Between Tissue Carotenoid Concentrations In The Pacific Mole Crab, Emerita Analoga, And Parasitism By The Acanthocephalan, Profilicollis Altmani, Whitney Melroy
Biological Sciences
Acanthocephalan worms infect two hosts to reach full development. Some species have been demonstrated to change their intermediate host’s behavior or coloration to increase the likelihood they will reach the final host. The pacific mole crab, Emerita analoga, is commonly parasitized by Profilicollis altmani along the Pacific coast of North and South America, but the impact of parasitism on the crab intermediate host is unclear. We investigated whether P. altmani alters the concentration of dietary carotenoids present in E. analoga tissues and if the parasite may also acquire pigments normally allocated to the host. Fifty eight gravid female crabs were …
Dairy Cow Grouping, Allison Mcmillan
Relationship Of Copper, Zinc And Selenium Status With Udder Health And Mastitis Incidence In The Cal Poly Holstein Herd, Michelle Van Ryn
Relationship Of Copper, Zinc And Selenium Status With Udder Health And Mastitis Incidence In The Cal Poly Holstein Herd, Michelle Van Ryn
Dairy Science
No abstract provided.
Use Of Loading Reports To Evaluate The Accuracy Of The Total Mix Ration, Kailen Johnson
Use Of Loading Reports To Evaluate The Accuracy Of The Total Mix Ration, Kailen Johnson
Dairy Science
No abstract provided.
Lameness And Locomotion Scoring Of Dairy Cows, Haley Lynne Aquino
Lameness And Locomotion Scoring Of Dairy Cows, Haley Lynne Aquino
Dairy Science
No abstract provided.
Algae As An Economical Protein Source For Dairy Cattle Nutrition, Brian Azevedo
Algae As An Economical Protein Source For Dairy Cattle Nutrition, Brian Azevedo
Dairy Science
Dairying continues to change with economic and environmental demands of today’s fast moving society. Feed costs continue to rise and now account for a large majority of expenses on dairies; especially protein, which has become expensive to purchase. I believe that Algae can serve as a possible solution to aid in alleviating this problem. Algae grow rapidly and consume undesirable carbon dioxide to release oxygen to the environment, making it an environmentally friendly source of feed. There are particular strands of algae that are high in protein. During the course of this project, I intend to discover how effective protein …
Usage Of The Penn State Forage Separator For Evaluating Particle Size Of Tmrs, Ashley Rene Garcia
Usage Of The Penn State Forage Separator For Evaluating Particle Size Of Tmrs, Ashley Rene Garcia
Dairy Science
Particle size has many effects on the cow. Adequate forage particle length is necessary for proper rumen function. Dairymen are also having a hard time measuring particle size. Proper particle size distribution of feeds is an important part of ration formulation. Management of forage particle size starts with harvesting forages at the proper stage of maturity. Chopping the crop at the right length helps to achieve the desired particle length in a TMR. Measuring particle length of the forages is only a portion of the solution. Analyzing the TMR particle size is the main goal in measuring the distribution of …
Training Manual And Protocol For Ultrasound At Cal Poly, Brian Andrew Waymire
Training Manual And Protocol For Ultrasound At Cal Poly, Brian Andrew Waymire
Dairy Science
No abstract provided.
Where The Wild Stuff Grows: Bacteria From The Cow To The Pasture-Izer, Michael Stewart
Where The Wild Stuff Grows: Bacteria From The Cow To The Pasture-Izer, Michael Stewart
Dairy Science
No abstract provided.
Selecting, Marketing And Rebuilding A Herd Of Genetically Superior Animals, Katherine Rector
Selecting, Marketing And Rebuilding A Herd Of Genetically Superior Animals, Katherine Rector
Dairy Science
No abstract provided.
Formation Of Cull Cow Program For The Artificial Insemination Class, Brian O. Medeiros
Formation Of Cull Cow Program For The Artificial Insemination Class, Brian O. Medeiros
Dairy Science
Cal Poly’s “Learn by Doing” philosophy is one of the great traits that the University holds. However it is this philosophy that is also one of the most expensive and hardest to maintain. “Production agriculture majors use more dollars per unit than any other major in the entire college,” as Dr. Golden stated during his talks about herd cut backs. Never the less the College of Agriculture prides itself on supplying knowledgeable and experienced students to the industry that supports it so much. One of the amazing classes that are offered at the university is the Dairy Science Artificial Insemination …
Sim-Plete Feeding Trial, Kelsey Johnson
Sim-Plete Feeding Trial, Kelsey Johnson
Animal Science
A. An internship with ENI will offer an opportunity to work in the field with horse owners, feeds, marketing, and nutrition. I will be assisting in the placement of a product in the field and evaluating response. It is the first step in evaluating if this product is an appropriate and marketable product.
B. The responsibilities will be to place a new equine feed product with 10-15 horse owners (approximately 30-45 horses) and measure customer response and potential marketability of the product. Including:
- Delivery of the product
- Creation of Questionnaires (one will be given before the owners begin feeding the …
The Malawi Project: From Conventional To Holistic Decision Making, Grace Wetmore
The Malawi Project: From Conventional To Holistic Decision Making, Grace Wetmore
Animal Science
How the Cal Poly Malawi Appropriate Technologies Team, and other development groups, can use Holistic Management to aid developing countries in an effort towards a sustainable future.
Creating A Rabbitry For A High School Agricultural Program: A Guide For The Approval Process And Materials Required, Anne Marie Katuin
Creating A Rabbitry For A High School Agricultural Program: A Guide For The Approval Process And Materials Required, Anne Marie Katuin
Agricultural Education and Communication
The proposal for a rabbitry to be added to the campus of Liberty High School in Golden Valley Unified School District in the designated agricultural area was proposed to the agricultural teacher and site administration for the high school. A floor plan was designed to fit the needs of a small rabbit breeding operation for the use of the LHS FFA students who wished to have a breeding or meat rabbit SAE.
Guidelines and plans were created in order to help an agricultural teacher or community member go through the previously mentioned approval process if they were to want to …
Student Sample Perceptions Of Organic Food Products And Buying Habits, Alycia M. Deus
Student Sample Perceptions Of Organic Food Products And Buying Habits, Alycia M. Deus
Agricultural Education and Communication
The purposes of this senior project were to identify college students’ perceptions and knowledge of organic food. This study also focuses on the respondents’ purchasing and budgeting of organic food. This information is essential to inform farmers and ranchers because it serves as an indicator of future market’s demands.
A thirteen item questionnaire was distributed to sixty-five students attending California Polytechnic State University, San Luis Obispo, enrolled in either Agricultural Education and Communication courses or Agricultural Business courses. Both upper and lower division classes were surveyed. The questionnaires were distributed and collected from June 2, 2009 to June 4, 2009. …
Hydrodynamics Of Freshwater Turtles: Maneuverability, Stability, And Effects Of Shell Shape, Gabriel Rivera
Hydrodynamics Of Freshwater Turtles: Maneuverability, Stability, And Effects Of Shell Shape, Gabriel Rivera
All Dissertations
Aquatic organisms exhibit tremendous diversity in body design and modes of propulsion that can strongly influence locomotor performance. Understanding how such differences affect locomotor performance is a major focus of research in integrative organismal biology and can provide insight into the evolutionary origins of such variation. Turtles are unique among extant tetrapods (i.e., amphibians, reptiles, birds, and mammals) in that they possess rigid bodies. In turtles, the vertebrae are fused dorsally with a bony carapace, precluding movement of the axial skeleton between the base of the neck and the tail. As a result of their immobilized axial skeleton and reduced …
Investigating Methods To Reduce Black Bear (Ursus Americanus) Visitation To Anthropogenic Food Sources: Conditioned Taste Aversion And Food Removal, Kari D. Signor
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Conflicts between humans and black bears (Ursus americanus) jeopardize the safety of both humans and bears, especially when bears become food-conditioned to anthropogenic food sources in areas such as campgrounds. Interest in using non-lethal techniques, such as aversive conditioning, to manage such conflicts is growing. I conducted a captive experiment at The Wildlife Science Center in Minnesota and two field experiments in the La Sal Mountains, Utah, to investigate the effects of taste aversion conditioning using thiabendazole (TBZ) with a novel flavor cue and food removal on black bear food consumption and visitation to human food sources. In …
Effects Of Coyote Removal On Pronghorn And Mule Deer Populations In Wyoming, Dylan Earl Brown
Effects Of Coyote Removal On Pronghorn And Mule Deer Populations In Wyoming, Dylan Earl Brown
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
I studied the relationship between coyote (Canis latrans) removal and pronghorn (Antilocapra americana) and mule deer (Odocoileus hemionus) density and fawn:doe ratios in southwest Wyoming and northeast Utah in 2007 and 2008. Coyote removal variables studied included the number of coyotes removed, ground hours worked, total hours worked, coyotes removed/aerial gunning hour, coyotes removed/ground work hour, and coyotes removed/total effort hour. None of the variables explained changes observed in fawn:doe ratios of pronghorn or mule deer. The number of coyotes removed, ground hours worked, total hours worked, and coyotes removed/aerial gunning hour were positively …
Summer Home Range Fidelity In Adult Female Elk (Cervus Elaphus) In Northwestern Colorado, April M. Brough
Summer Home Range Fidelity In Adult Female Elk (Cervus Elaphus) In Northwestern Colorado, April M. Brough
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Understanding the degree of spatial fidelity of individuals within a species increases our ability to manage appropriately. Elk (Cervus elaphus) is a highly managed species in the Intermountain West, but there is little research evaluating summer home range fidelity of individual elk. We evaluated fidelity of 72 adult female elk to individual summer-fall home ranges in the White River study area in northwestern Colorado during two consecutive summers. Based on individual kernel-estimated utilization distributions, we used (1) the Volume of Intersection (VI) statistic and (2) interannual distances between centers of mass to compare summer range overlap and distribution. …
The Effect Of Irrigation Diversions On The Mountain Whitefish (Prosopium Williamsoni) Population In The Big Lost River, Patrick Allen Kennedy
The Effect Of Irrigation Diversions On The Mountain Whitefish (Prosopium Williamsoni) Population In The Big Lost River, Patrick Allen Kennedy
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Management agencies documented a decline in the mountain whitefish (Prosopium williamsoni) population on the Big Lost River, and unscreened diversions were recognized as a potential factor for this decline. Research suggests the Big Lost River mountain whitefish population is genetically unique, and it has been petitioned for protection under the Endangered Species Act. In 2007, a basin-wide synopsis of diversions was conducted to describe relative entrainment and identify diversions that entrained the most mountain whitefish. This larger scaled synopsis facilitated a more precise assessment of entrainment by a subset of diversions in 2008. In 2008, the volume that …
The Effects Of Social Status And Learning On Captive Coyote (Canis Latrans) Behavior, Lynne Barbara Gilbert-Norton
The Effects Of Social Status And Learning On Captive Coyote (Canis Latrans) Behavior, Lynne Barbara Gilbert-Norton
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Many canids live within hierarchical social systems that could promote differences in learning or in behavior between ranked individuals. Differences in foraging and territorial behavior have been observed between ranked coyotes (Canis latrans), yet effects of learning and social status on coyote behavior are not thoroughly understood. I explored a) coyote response to an artificial scent boundary and whether response differed by status, b) how foraging coyotes tracked temporal resource change, and c) how coyotes find spatially distributed food, and the effect of dominance on foraging behavior. I used male/female pairs of captive coyotes at the National Wildlife Research Center …
Direct Effects Of Heat Stress During Meiotic Maturation On Bovine Oocyte And Cumulus Rna, Rebecca R. Payton
Direct Effects Of Heat Stress During Meiotic Maturation On Bovine Oocyte And Cumulus Rna, Rebecca R. Payton
Doctoral Dissertations
Heat-induced reductions in developmental competence after direct exposure of oocytes to 41ºC have been coincident with reduced protein synthesis. Since heat stress perturbs RNA integrity and polyadenylation in somatic cells, it was hypothesized that heat stress during meiotic maturation may alter RNA within oocytes and/or their surrounding cumulus to account for some of the reductions in development. Initial efforts utilized microcapillary electrophoresis to examine oocyte and cumulus RNA without heat stress as a first step toward transcriptome profile analysis. Size distribution of RNA, rRNA ratio, and other related endpoints differed for oocyte RNA compared to cumulus, and were conserved across …
Investigating Saxitoxin Resistance In Softshell Clams (Mya Arenaria): Patterns Of Inheritance And Improvements On Methodology For Tracking And Identification, Scott A. Hamilton
Investigating Saxitoxin Resistance In Softshell Clams (Mya Arenaria): Patterns Of Inheritance And Improvements On Methodology For Tracking And Identification, Scott A. Hamilton
Electronic Theses and Dissertations
Attempts to characterize and study the population dynamics of the softshell clam Mya arenaria in relation to a mutation which confers resistance to paralytic shellfish toxins are complicated by a lack of non-lethal genotyping techniques, reliable tagging methods and an understanding of the inheritance patterns of the marker. Presented here, is a straightforward and non-lethal technique for clam genotyping, a new method for the long term tagging of clams, and the offspring genotype frequencies from a number of pair matings between clams of known genotype. Hemolymph extracted from M. arenaria was used directly in a polymerase chain reaction (PCR) to …
Conservation Genetics And Systematics Of Several Turtles Species In The Southeastern United States, Joshua Robert Ennen
Conservation Genetics And Systematics Of Several Turtles Species In The Southeastern United States, Joshua Robert Ennen
Dissertations
Chelonians (i.e., turtles) are an imperiled group of reptiles with about 66% of the recognized species listed as threatened by the IUCN. Most chelonian species have a unique set of life history traits (i.e., longevity, delayed sexual maturity, and low juvenile survivorship), which makes their populations exceedingly sensitive to increases in adult and juvenile moralities. With numerous anthropogenic effects (e.g., habitat alteration, exploitation, and over harvesting) negatively influencing mortality rates, chelonians have experienced global precipitous declines and extinctions.
This dissertation focuses on species within two chelonian genera, Gopherus and Graptemys. Although these two genera are vastly different ecologically, they are …
Experimental Population Dynamics Of Amyloodiniumocellatum In The Spotted Seatrout, Cynoscion Nebulosus, And The Red Snapper, Lutjanus Campechanus, Ignacio Masson
Dissertations
Amyloodinium ocellatum is a parasitic dinoflagellate that infects warm water marine bony fishes and causes high mortalities in aquaculture settings. It has three life history stages: the feeding trophont, the reproductive tomont, and the infective dinospore. This dissertation describes the characteristics of A. ocellatum infections in juvenile spotted seatrout, Cynoscion nebulosus, and red snapper, Lutjanus campechanus, studies the survival and fecundities of the stages in the life cycle of the parasite and presents a population model for A. ocellatum.
At 25°C and 33 ppt, the peak of trophont detachment occurred on day 2 postinfection in spotted seatrout and day 3 …
Population Ecology And Reproductive Biology Of The Diamondback Watersnake, Nerodia Rhombifer (Serpentes: Colubridae), In Southernmost Texas, Ruben D. Zamora
Population Ecology And Reproductive Biology Of The Diamondback Watersnake, Nerodia Rhombifer (Serpentes: Colubridae), In Southernmost Texas, Ruben D. Zamora
Theses and Dissertations - UTB/UTPA
Nerodia rhombifer is a polytypic, semi-aquatic snake with a broad geographical distribution ranging from the American Midwest southward to Chiapas, Mexico. Although relatively abundant throughout much of its range, few ecological studies of the species have been conducted. This study provides basic population ecology information in a subtropical habitat. Population data were obtained in a mark-recapture study at Santa Ana National Wildlife Refuge, Hidalgo County, Texas, from August 1995 to December 1998. Specimens taken elsewhere in Hidalgo County provided information on the reproductive biology. This study provides the first absolute density estimates from anywhere within the species’ range. Quantitative information …