Animal Studies Commons^™

Liquid Border, Yingfan Jia

Masters Theses

A River is a mighty and constantly-evolving force, leaving behind an intricately designed and constantly changing system. Not just a river, the Rio Grande stretches all the way from Colorado before intersecting with the US-Mexico Border in southern Texas - a point where the powerful forces of nature now merge with a clearly-defined political boundary. The outcome of this is a unique ecological niche, which may often go unnoticed despite its distinctiveness.

Texas is famous for its farms and ranches, and the Rio Grande Valley of South Texas was once an agricultural hub. However, urbanization and the depletion of water …

The Spatial Ecology And Habitat Selection Of A Spotted Turtle (Clemmys Guttata) Population In Southwest Michigan, Michela Coury

Masters Theses

Turtles are arguably the most threatened group of vertebrates on the planet. Anthropogenic influences such as habitat loss and fragmentation, road mortality, subsidized predators, climate change, and illegal collection have contributed to their global decline. Understanding which isolated populations of turtles are viable despite these synergistic threats is crucial for making conservation and management decisions. In Michigan, the spotted turtle (Clemmys guttata) is a threatened species subjected to many negative anthropogenic influences that accelerate its rapid population decline. In order to properly sustain their populations, the goal of my research was to investigate relevant factors that help us …

Relationships Between Personality Type And Cognitive Ability In Marmoset Monkeys (Callithrix Jacchus), Zachary Marciano

Masters Theses

Personality refers to multiple traits that are thought to be stable over time and across situations. It is recognized that personality has a neural basis and is associated with health outcomes. Whether personality is also associated with cognitive ability, however, is still a matter of intense debate. One way to examine these potential relationships is to use a nonhuman primate model for which complexities present in humans can be minimized. Recent research into the varying personality types of marmoset monkeys suggests that there are predominantly three to five core primary domains that most marmosets and other primates can be categorized …

One Year Change In Cognitive Function In Male And Female Common Marmosets (Callithrix Jacchus), Brianna Healey

Masters Theses

Long term cognitive studies in humans and nonhuman primates such as macaques are difficult because of their long lifespan. The common marmoset (Callithrix jacchus) is a non-human primate who shares with humans many features characteristic of primates, including a complex brain and cognitive function. They also have a short lifespan (~10 years) that makes them a great model in studies of cognitive aging. This study focuses on the rate of decline in cognitive function in male and female marmosets based on performance on reversal learning tasks over 2 years of testing.

We found that marmosets improved their overall …

Does Lactobacillus Reuteri Probiotic Treatment Improve Sleep Quality In Rhesus Macaques (Macaca Mulatta) Displaying The Self-Injurious Phenotype?, Peter Mcginn

Masters Theses

Self-injurious behavior (SIB) is a complex phenotype that occurs with an increasing prevalence of about 7-34% in humans and 10-12% in non-human primates (NHPs). This study evaluated the efficacy of probiotic Lactobacillus reuteri as a treatment for self-injurious behavior (SIB) and sleep disruption in rhesus macaques. The treatment was proposed to alleviate mild self-biting, sleep disruption, and reduce chronically elevated hypothalamic-pituitary-adrenocortical (HPA) axis activity, all hallmark features of monkeys with this condition. The probiotic preparation included two strains of L. reuteri (L. reuteri ATCC PTA 6475 & L. reuteri DSM 17938) containing on average 200 million colony forming units …

Survival And Habitat Selection Of Golden-Winged Warblers (Vermivora Chrysoptera) During Nesting And Post-Fledging Periods At North Cumberland Wildlife Management Area, Tennessee, Justin Andrew Lehman

Masters Theses

Golden-winged Warbler (Vermivora chrysoptera) populations in the Appalachian Mountains have declined precipitously over the past 50 years. To better understand the decline, I studied two important aspects of the reproductive cycle: the nesting and post-fledging periods on reclaimed surface mines and recent timber harvest sites at North Cumberland Wildlife Management Area (NCWMA), Tennessee from 2013 to 2015. Nestlings were radio-marked with a 30-day transmitter two days before their scheduled fledge date and monitored daily once they fledged. Vegetation data were collected at the nest site and daily fledgling locations points along with paired random points. Vegetation characteristics most …

Utilizing Behavioral Monitoring To Detect Sickness Or Injury In Dairy Cow And Calves, Nicole Louise Eberhart

Masters Theses

Cattle experience behavioral changes during incidences of discomfort such as respiratory disease, hock injuries, and lameness. Visual evaluation of these conditions, particularly lameness and respiratory disease can be subjective and may lead to untreated animals, which reduces the overall well-being of the animals. In order to improve detection of affected cattle, continuous or combined monitoring systems should be used. These technologies may improve detection compared to visual assessment by reducing human bias. Behavioral changes in particular may be detected through these means, with changes indicating potential health abnormalities in the individual cattle. One such behavior that changes during incidences of …

Raccoon Scavenging And The Taphonomic Effects On Early Human Decomposition And Pmi Estimation, Jacob K. Smith

Masters Theses

Forensic investigators must consider the effects of numerous taphonomic variables when estimating the postmortem interval (PMI) in forensic cases, such as temperature and insect activity. Efforts to quantify the decomposition process have been made. Megyesi et al. (2005) modified the categories and stages of decomposition presented by Galloway et al. (1989), and introduced a total body scoring system that uses accumulated degree-days to estimate PMI. However, none of these systems include the potential effects of animal scavenging. Galloway et al. (1989) stated that carnivorous activity occurs mainly during advanced decomposition and mummification. Haglund et al. (1989) specifically investigated canid scavenging …

An Attempt To Find Auditory Communication In The Squirrel Monkey Via Cooperative Conditioning, Michael T. Bardo

Masters Theses

No abstract provided.

The Effects Of Crowding, Density, And The Duration Of Each On Learning, Richard A. Neetz

Masters Theses

Ninety-six male albino rats were housed from weaning in groups of 4, 8, or 16 animals. For all group sizes, animals were housed either in cages of a constant size (crowding) or in cages with floor space proportional to group size (density). Six animals from each of these conditions were tested for learning after either 55 or 109 days on a straight alley, a Lashley III maze, and a Y-maze. On the straight alley, no significant differences in running speed were found between durations, crowding and density, or group size. A significant trials effect was obtained (F=63.28, df=15/900, p < .01). On the Lashley III, a significant trials effect was obtained for running speed (F=102.27, df=8/480, p < .01) and errors (F=63.80, df=8/480, p < .01). The duration comparison showed the 55 day group making significantly more errors than the 109 day group (F=5.36, df=1/60, p < .05). No significant differences were found on running speed or errors between crowding and density or group size. On the Y-maze, the 55 day group had significantly more avoidances than the 109 day group (F=6.47, df=1/60, p < .05). …

An Investigation Of Food Deprivation And Competition On Hoarding Behavior In The Domestic Cat, Jo Ann Sinclair

Masters Theses

No abstract provided.