Search
Skip to Search Results- 11Persistence
- 7Biological control
- 2Canada
- 1Acyrthosiphon pisum
- 1Advection–diffusion equations
- 1Alberta
- 2Lewis, M.A.
- 1Aldridge, C. L.
- 1Ambrose, Divakar J.
- 1Barrion, Alberto, T.
- 1Boyce, M. S.
- 1Buddel, Neil A
- 9Graduate and Postdoctoral Studies (GPS), Faculty of
- 9Graduate and Postdoctoral Studies (GPS), Faculty of/Theses and Dissertations
- 7Biological Sciences, Department of
- 6Biological Sciences, Department of/Journal Articles (Biological Sciences)
- 1Agricultural, Food and Nutritional Science, Department of
- 1Agricultural, Food and Nutritional Science, Department of/Journal Articles (Agricultural, Food and Nutritional Science)
- 1Cárcamo, Héctor A. (Agriculture and Agri-Food Canada)
- 1Dosdall, Lloyd M. (Agricultural, Food and Nutritional Science)
- 1Gannon, Terry (Mathematical and Statistical Sciences)
- 1Heo, Giseon (Dentistry)
- 1McMullen, Lynn (Agricultural, Food, and Nutritional Science
- 1Spence, John (Renewable Resources)
-
"Stories Matter:" A Narrative Inquiry Exploring First-Generation University Student Persistence
DownloadFall 2014
Though postsecondary participation has increased overall, the rate of participation has risen more sharply for middle-class students compared with working-class students (Knighton & Mirza, 2002). Especially pronounced is Krahn’s (2009) finding that children from families where at least one...
-
Effects of Bacillus thuringiensis on non-target herbivore and natural enemy assemblages in tropical irrigated rice
Download2003
Cohen, Michael, B., Gaolach, Bradley, Viagante, Vicente D., Zhang, Wenjun, Schoenly, Kenneth G., Barrion, Alberto, T.
Endotoxins from Bacillus thuringiensis (Bt) produced in transgenic pest-resistant Bt crops are generally not toxic to predatory and parasitic arthropods. However, elimination of Bt-susceptible prey and hosts in Bt crops could reduce predator and parasitoid abundance and thereby disrupt biological...
-
2006-01-01
McCauley, E., Lewis, Mark A., Lutscher, F.
The question how aquatic populations persist in rivers when individuals are constantly lost due to downstream drift has been termed the “drift paradox.” Recent modeling approaches have revealed diffusion-mediated persistence as a solution. We study logistically growing populations with and...
-
In vivo and in vitro evaluation of Beauveria bassiana pathogenicity for western flower thrips, Frankliniella occidentalis [MSc Dissertation]
Download2007
Western flower thrips, Frankliniella occidentalis, are major pests in greenhouses. The fungus Beauveria bassiana is a safer alternative to use of chemical insecticides against this insect; and evaluating isolates for high virulence has usually involved in vivo studies. My approach examines in...
-
Integrated pest management of Sitona lineatus L. (Coleoptera: Curculionidae) in crops of Pisum sativum L. (Fabales: Fabaceae) in Western Canada
DownloadFall 2010
Sitona lineatus L. (Coleoptera: Curculionidae) is a pest of Pisum sativum L. (Fabales: Fabaceae) and managing it is a challenge because of its fecundity, migratory behavior and concealed larval habitat. Potential components of an integrated pest management program for S. lineatus were...
-
Intrinsic rate of increase and temperature coefficients of the aphid parasite Ephedrus californicus baker (Hymenoptera: Aphidiidae)
Download1987
The demographic statistics and the temperature requirements for development of Ephedrus californicus Baker were determined under constant laboratory conditions. At 23°C, females provided each day with forty 2nd-instar pea aphids, Acyrthosiphon pisum (Harris), lived for 13.4 days and laid 1193...
-
Linking occurrence and fitness to persistence: habitat-based approach for endangered greater sage-grouse
Download2007
Detailed empirical models predicting both species occurrence and fitness across a landscape are necessary to understand processes related to population persistence. Failure to consider both occurrence and fitness may result in incorrect assessments of habitat importance leading to inappropriate...
-
Fall 2017
This thesis focuses on formulating and analyzing non linear models for microbial dynamics vis-a-vis human and environmental health. Firstly, we develop and investigate a stoichiometric organic matter decomposition model in a chemostat culture that incorporates the dynamics of grazers. This...
-
2008
De-Camino-Beck, T., Lewis, M.A.
Understanding the relationship between life-history patterns and population growth is central to demographic studies. Here we derive a new method for calculating the timing of reproductive output, from which the generation time and its variance can also be calculated. The method is based on the...