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Skip to Search Results- 13Biological Sciences, Department of
- 13Biological Sciences, Department of/Journal Articles (Biological Sciences)
- 4Graduate and Postdoctoral Studies (GPS), Faculty of
- 4Graduate and Postdoctoral Studies (GPS), Faculty of/Theses and Dissertations
- 3Agricultural, Food and Nutritional Science, Department of
- 3Agricultural, Food and Nutritional Science, Department of/Journal Articles (Agricultural, Food and Nutritional Science)
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Daily steps are low year-round and dip lower in fall/winter: Findings from a longitudinal diabetes cohort
Download2010
Pilote, Louise, Chan, Cathy, Joseph, Lawrence, Strachan, Ian, Sigal, Ron J., Dasgupta, Kaberi
Background Higher walking levels lead to lower mortality in type 2 diabetes, but inclement weather may reduce walking. In this patient population, we conducted a longitudinal cohort study to objectively quantify seasonal variations both in walking and in two vascular risk factors associated with...
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2004
Derocher, Andrew E., Skaare, Janneche U., Jenssen, Bjørn Munro, Sørmo, Eugen G., Lie, Elisabeth, Braathen, Marte, Wiig, Øystein
We studied the relationships between polychlorinated biphenyls (PCBs) and thyroid hormones (THs) and retinol within two groups of female polar bears (Ursus maritimus), females with cubs of the year (FWCOY) and females without cubs of the year (FWOCOY), and within a group of males. Concentrations...
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Performance and stability of performance of spring wheat variety mixtures in organic and conventional management systems in western Canada
Download2009
O'Donovan, John T., Navabi, Alireza, Kaut, A. H. E. E., Spaner, Dean, Mason, Heather E.
Wheat (Triticum aestivum L.) variety mixtures represent a relatively unexplored avenue for maintaining and stabilizing yield for both organic and conventional producers. The present study examined the responses of three Canadian western red spring wheat varieties in sole crop and in variety...
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Tapeworm (Hymenolepis diminuta) infection in flour beetles (Tribolium confusum): does it cause a trade-off between host fecundity and egg size?
Download2009
Inter- and intra-specific comparisons commonly reveal an inverse relationship between fecundity and offspring size. Many animals also vary egg size in response to environmental conditions. Infection of flour beetles Tribolium confusum Jaquelin Du Val, 1868 with the rat tapeworm Hymenolepis...
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2003
Skaare, J.U., Wiig, Ø., Haave, M., Dahl, E., Lie, E., Ropstad, E., Derocher, A.E.
High concentrations of polychlorinated biphenyls (PCBs) in polar bears from Svalbard have increased concern for that population’s reproductive health. We examined whether there were associations between the plasma concentrations of PCBs and reproductive hormones [progesterone (P4) and...
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2013
Yasui, Y., Burstyn, I., Li, Q., Beesoon, S., Cherry, N. M., Martin, J. W., Bamforth, F.
We conducted a case-referent study of the effect of exposure to bisphenol-A on fetal growth in utero in full-term, live-born singletons in Alberta, Canada. Newborns <10 percentile of expected weight for gestational age and sex were individually matched on sex, maternal smoking and maternal age to...
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Effects of Habitat Fragmentation on Pairing Success of Ovenbirds: Importance of Male Age and Floater Behavior
Download2001
Bayne, Erin M., Hobson, Keith A.
Between 1996 and 1998, we compared pairing success of territorial male Ovenbirds (Seiurus aurocapillus) in forest fragments created by forestry (n 5 3) and agriculture (n 5 10) to contiguous forest plots (n 5 3) in the southern boreal mixedwood forest of central Saskatchewan. The percentage of...
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1998
Boonstra, R., Hik, D., Tinnikov, A., Singleton, G. R.
The sublethal effects of high predation risk on both prey behavior and physiology may have long-term consequences for prey population dynamics. We tested the hypothesis that snowshoe hares during the population decline are chronically stressed because of high predation risk whereas those during...
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Effects of crop rotation and genetically modified herbicide-tolerant corn on ground beetle diversity, community structure and activity density
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Spence, J.R., Floate, K., Blackshaw, R.E., Bourassa, S., Carcamo, H.A.
Ground beetles (Coleoptera. Carabidae) were sampled in conventional and genetically modified herbicide-tolerant (GM HT) corn, Zea mays L. (Poaceae), planted under rotation with canola, Brassica L. (Brassicaceae), or continuously cropped corn to investigate the influence of corn variety and...
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2007
Sperling, F. A. H., MacQuarrie, C. J. K., Langor, D. W.
Mitochondrial cytochrome oxidase I and 11 genes were sequenced for two invasive alien birch (Betula L. [Betulaceae]) leaf-mining sawflies, Profenusa thomsoni (Konow, 1886) (Hymenoptera: Tenthredinidae) and Scolioneura betuleti (King, 1816) (Hymenoptera: Tenthredinidae), accidentally introduced...