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.
Displaying 1 - 4 of 4

Results per page

Displaying 1 - 4 of 4

Time-dependent effects of predation risk on stressor reactivity and growth in developing larval anurans (Lithobates pipiens)

22197-Thumbnail Image.png
Year: 2017, 2017
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Longhi, Jessica N., Thesis advisor (ths): Murray, Dennis L, Thesis advisor (ths): Kerr, Leslie R, Degree committee member (dgc): Emery, R.J. Neil, Degree granting institution (dgg): Trent University
Abstract: <p>The predator vs. prey dynamic is an omnipresent factor in ecological systems that may drive changes in life history patterns in prey animals through behavioural, morphological, and physiological changes. Predation risk can have profound effects on the life history events of an animal, and is influenced by the neuroendocrine stress response. Activation of the hypothalamic-pituitary-… more

The third wheel: How red squirrels affect the dynamics of the lynx-snowshoe hare relationship

22201-Thumbnail Image.png
Year: 2017, 2017
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Chan, Kevin Wai, Thesis advisor (ths): Murray, Dennis L, Degree committee member (dgc): Feng, Wenying, Degree committee member (dgc): Row, Jeff, Degree granting institution (dgg): Trent University
Abstract: <p>Population cycles are regular fluctuations in population densities, however, in recent years many cycles have begun to disappear. With Canada lynx this dampening has also been seen with decreasing latitude corresponding to an increase in prey diversity. My study investigates the role of alternate prey on the stability of the lynx-hare cycle by first comparing the functional responses of… more

Assessing Canada Lynx Dispersal Across an Elevation Barrier: Genetic Structure in Light of Habitat

22391-Thumbnail Image.png
Year: 2017, 2017
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Watt, Cristen Margaret, Thesis advisor (ths): Murray, Dennis L, Degree committee member (dgc): Wilson, Paul J, Degree committee member (dgc): Bowman, Jeff, Degree granting institution (dgg): Trent University
Abstract: <p>Mountain ranges are often thought to restrict movement of wildlife, yet previous studies evaluating the role of the Rocky Mountains as a dispersal barrier for Canada lynx (Lynx canadensis) have been contradictory. Our study uses neutral microsatellite loci to evaluate the role of the Rocky Mountains as a barrier to gene flow for lynx. Although lynx exhibited low genetic differentiation,… more

The origin and ecological function of an ion inducing anti-predator behaviour in Lithobates tadpoles

22243-Thumbnail Image.png
Year: 2017, 2017
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Austin, Cayla Ev, Thesis advisor (ths): Murray, Dennis L, Degree committee member (dgc): Stock, Naomi L, Degree committee member (dgc): Rafferty, Steven P, Degree granting institution (dgg): Trent University
Abstract: <p>Chemical cues are used commonly by prey to identify predation risk in aquatic environments. Previous work has indicated that negatively-charged ions of m/z 501 are possibly a kairomone that induces anti-predator responses in tadpoles. This thesis found that this ion species: (i) is produced by injured tadpoles; (ii) exhibits increased spectral intensity with higher tadpole biomass; and (… more