UMD Theses and Dissertations

Permanent URI for this collectionhttp://hdl.handle.net/1903/3

New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a given thesis/dissertation in DRUM.

More information is available at Theses and Dissertations at University of Maryland Libraries.

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Subject: search.filters.subject.golden lion tamarin

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    A Wildlife Crossing Model for the Golden Lion Tamarin
    (2020) Turner, Sarah Elizabeth; Ellis, Christopher; Plant Science and Landscape Architecture (PSLA); Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    The golden lion tamarin is an endangered species endemic to the Atlantic Forest of Brazil. In the 1970’s, their population was only a few hundred individuals due to anthropogenic reasons, such as fragmentation, deforestation, poaching and hunting. Over time with conservation measures, their population grew, and is currently around 2,516 individuals. This number, however, is not stable. As a major highway, BR-101, continues to widen, populations of golden lion tamarins continue to be isolated, resulting in inbreeding and lack of allele transfer. Golden lion tamarins are known to avoid crossing roads, so an alternate solution must be implemented. That alternate solution is a wildlife crossing. Building a wildlife crossing over BR-101 to connect currently isolated populations of golden lion tamarins will allow for genetic exchange and will eventually stabilize the golden lion tamarin population.
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    PREDATOR INFLUENCE ON GOLDEN LION TAMARIN NEST CHOICE AND PRESLEEP BEHAVIOR
    (2004-04-27) Franklin, Samuel Patrick; Dietz, James M; Behavior, Ecology, Evolution and Systematics
    Primate sleeping site choices and cryptic pre-retirement behaviors presumably aid survival by reducing a predator's ability to find and access prey. I examined presleep behaviors in a population of golden lion tamarins (Leontopithecus rosalia) that recently suffered heavy losses from predators. I analyzed existing sleeping site data to determine whether groups at higher risk of predation, as measured by the number of observed encounters with potential predators, changed den sites more frequently than groups at lower risk. Additionally, I evaluated scent marking data to resolve whether study individuals decreased scent marking just prior to retiring. The predator encounter interval was not a significant predictor of the rate with which social groups changed den sites and study individuals significantly increased scent marking just prior to retiring. Consequently, it appears that after multiple generations without exposure to heavy predation pressure the tamarins in this isolated population fail to alter their behavior appropriately to mitigate predation risk.