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Articles 1 - 6 of 6
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Collective Decision Making In Tibetan Macaques: How Followers Affect The Rules And Efficiency Of Group Movement, Amanda Rowe
Collective Decision Making In Tibetan Macaques: How Followers Affect The Rules And Efficiency Of Group Movement, Amanda Rowe
All Master's Theses
Primate societies must undergo successful collective decision making during group movement to stay cohesive and provide the ecological and evolutionary benefits of sociality. This study investigates how a fan structure facilitates successful group movement in the YA1 group of Tibetan macaques (Macaca thibetana) at Mt. Huangshan National Reserve in Anhui, China. We used structural equation modeling (SEM) to determine the relative influences of sex, age, maternal kinship, dominance, and social network centrality on the number of fans (consistent followers) an individual had, and the number of group members an individual was a fan of (fandom). SEM revealed that …
Mother-Offspring Relationships In Tibetan Macaques (Macaca Thibetana) At Mt. Huangshan, China, Courtney Martinez
Mother-Offspring Relationships In Tibetan Macaques (Macaca Thibetana) At Mt. Huangshan, China, Courtney Martinez
All Master's Theses
The mammalian mother-offspring relationship, the first bond an offspring will form, is complex in its development, as well as its costs and benefits to both mother and offspring. Across various non-human primate species, researchers have extensively examined this relationship, yet very little is known about how it changes as offspring age. Mother-infant relationships within the genus Macaca, for example, have been observed for decades in both field and laboratory settings. Researchers have found species differences in maternal behavior, as well as a female offspring bias in female philopatric societies. However, little is known about the mother-offspring relationship of Tibetan …
Enrichment Use & Social Interactions In A Mixed-Species Enclosure Of Sumatran (Pongo Abelij) & Bornean Orangutans (P. Pygmaeus) & Northern White-Cheeked Gibbons (Nomascus Leucogenys), Emily Veitia
All Master's Theses
Enrichment is an aspect of captive husbandry that has been shown to positively impact animals’ well-being and can be designed to encourage species-typical behaviors, such as foraging and arboreality. Enrichment can include housing together multiple compatible species. Orangutans are sympatric with siamangs and agile and Bornean gibbons, so several zoos house these four Asian ape species in the same enclosure, in part, as social enrichment. In my study, I observed enrichment use and social interactions in a mixed-species enclosure at the Oregon Zoo, which housed two Sumatran (Pongo abelii) and two Bornean (P. pygmaeus) orangutans with …
Effects Of Wildfires On Rattlesnake (Crotalus Oreganus) Growth And Movement In Washington State, Joseph Chase
Effects Of Wildfires On Rattlesnake (Crotalus Oreganus) Growth And Movement In Washington State, Joseph Chase
All Master's Theses
Fire is a dominant force in the Pacific Northwest that shapes ecosystems and influences wildlife, yet little is known of its effects on local predators. Northern Pacific rattlesnakes (Crotalus oreganus) comprise an excellent model to investigate how fire may influence wildlife because they are important predators that contribute to controlling prey populations, but are also unable to readily escape from wildfires. We developed a novel technique to assess growth rates of rattlesnakes by using digital photography to analyze differences in widths of their rattle segments laid down over time. We compared growth rates of rattlesnakes in habitats that …
Modeling Sex-Specific Seasonal Habitat Selection For Elk (Cervus Elaphus) In Central Washington, Lewis Meyers
Modeling Sex-Specific Seasonal Habitat Selection For Elk (Cervus Elaphus) In Central Washington, Lewis Meyers
All Master's Theses
Elk (Cervus elaphus) are generalist herbivores, exploiting a variety of environments. I studied habitat selection and sexual segregation of the Colockum elk herd in central Washington. I used a resource selection probability function (RSPF) to evaluate habitat use by males and females during summer and winter seasons. I assisted Washington State Department of Fish and Wildlife (WDFW) in capturing and placing GPS collars on males, and used an existing GPS dataset from females to investigate the extent to which sexual segregation was occurring in the Colockum herd. During summer, males selected steep slopes on north, west and south …
A Comparison Of Seedling Diversity And Abundance In The Range Of Howler Monkeys (Alouatta Palliata) In Bocas Del Toro, Panama, Erin Connelly
A Comparison Of Seedling Diversity And Abundance In The Range Of Howler Monkeys (Alouatta Palliata) In Bocas Del Toro, Panama, Erin Connelly
All Master's Theses
In this study, I investigated the potential effect of howler monkey (Alouatta palliata) defecations on the diversity and abundance of seedlings on the forest floor of a tropical lowland forest in Bocas del Toro, Panama. I conducted follows on a howler monkey group for 18 days and found six trees the monkeys used for sleeping. During this time, I collected feces and extracted the ingested seeds. I counted the seeds and identified the seed genus when possible. After this initial observation period, I constructed transects in random directions covering the entire tree crown underneath sleeping trees. I collected …