Trent University Graduate Thesis Collection

Item Description
Identifier
tula:etd
Type
Collection
Language
eng
Extent
1 item
Rights
Copyright for all items in the Trent University Graduate Thesis Collection is held by the author, with all rights reserved, unless otherwise noted.
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Displaying 1 - 5 of 5

The ecological, evolutionary, and behavioural context of ultrasonic vocalizations in flying squirrels

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Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Newar, Sasha Lynn, Thesis advisor (ths): Bowman, Jeff, Degree committee member (dgc): Davy, Christina M, Degree committee member (dgc): Burness, Gary, Degree granting institution (dgg): Trent University
Abstract: <p>Acoustic communication is vital for mediating interactions between individuals and their environment. From echolocating bats to isolated rodent pups, ultrasonic vocalizations are a useful mechanism for producing localized and cryptic acoustic signals. Flying squirrels have been demonstrated to produce almost exclusively ultrasonic calls which is rare in both squirrels and mammals, though… more

Forest Roost Use by Little Brown Bats (Myotis lucifugus) in Ontario

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Year: 2022, 2022
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Holt, Ryan, Thesis advisor (ths): Bowman, Jeff, Thesis advisor (ths): Davy, Christina M, Degree committee member (dgc): Koen, Erin L, Degree granting institution (dgg): Trent University
Abstract: <p>Roosts offer bats protection from predators, shelter from external environmental conditions, and a space where sociality, mating, and the rearing of young can occur. However, knowledge gaps still remain for many forest roosting species, such as the little brown bat (Myotis lucifugus) surrounding what roosts are selected, and what variables are influential at differing scales of selection… more

Assessing effects and fate of environmental contaminants in invasive, native, and endangered macrophytes

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Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Sesin, Verena, Thesis advisor (ths): Freeland, Joanna R, Thesis advisor (ths): Davy, Christina M, Degree committee member (dgc): Gilbert, Janice M, Degree granting institution (dgg): Trent University
Abstract: <p>Macrophytes play an important role in aquatic ecosystems, and thus are integral to ecological risk assessments of environmental contaminants. In this dissertation, I address gaps in the assessments of contaminant fate and effects in macrophytes, with focus on glyphosate herbicide use for invasive plant control. First, I evaluated the suitability of Typha as future standard test species… more

Disease ecology of ophidiomycosis in free-ranging snakes

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Year: 2020, 2020
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Dillon, Rachel, Thesis advisor (ths): Davy, Christina M, Thesis advisor (ths): Bowman, Jeff, Degree committee member (dgc): Donaldson, Michael, Degree granting institution (dgg): Trent University
Abstract: <p>Ophidiomycosis (snake fungal disease) is caused by the pathogen Ophidiomyces ophiodiicola. Infected snakes exhibit dermal lesions, occasional systemic infections, and, in some cases, mortality. We studied snakes at Rondeau Provincial Park, Ontario, Canada, to explore whether ophidiomycosis develops during brumation or year-round. Throughout their active season, we quantified the… more

Investigating the regional variation in frequencies of the invasive hybrid cattail, Typha × glauca

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Year: 2019, 2019
Member of: Trent University Graduate Thesis Collection
Name(s): Thesis advisor (ths): Freeland, Joanna R, Thesis advisor (ths): Dorken, Marcel E, Degree committee member (dgc): Davy, Christina M, Degree granting institution (dgg): Trent University
Abstract: <p>Interspecific hybridization rates can vary depending on genomic compatibilities between progenitors, while subsequent hybrid spread can vary depending on hybrid performance and habitat availability for hybrid establishment and persistence. As a result, hybridization rates and hybrid frequencies can vary across regions of parental sympatry. In areas around the Laurentian Great Lakes,… more