Effets des vagues de chaleur au cours de la phase d'acclimatation sur la biologie hivernale de l'arpenteuse de la pruche, Lambdina ficsellaria (Lepidoptera : Geometridae)

Authors: Vallières, Rosemarie
Advisor: Bauce, ÉricBerthiaume, Richard
Abstract: The increase in frequency and intensity of extreme climatic events such as fall heat waves, resulting from the ongoing climate warning could interfere with the winter metabolism of the hemlock looper (Lambdina fiscellaria Guen), an important forest pest in eastern Canada. The main objective of this study is to determine the impact of the host plant quality, the geographic origin of populations and the conditions prevailing during the cold acclimation period on hemlock looper winter biology. Our results show that eggs contents in trehalose, glucose and mannitol were significantly influenced by fall heat waves and by the origin of the population. Egg winter survival of the southern population was negatively affected by strongest heat waves while the northern population was not affected. This study suggests that the metabolism and winter survival of southern hemlock looper populations in Québec will be more affected by fall heat waves than northern populations.
Document Type: Mémoire de maîtrise
Issue Date: 2013
Open Access Date: 19 April 2018
Permalink: http://hdl.handle.net/20.500.11794/24526
Grantor: Université Laval
Collection:Thèses et mémoires

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