Does thermal-related plasticity in size and fat reserves influence supercooling abilities and cold-tolerance in Aphidius colemani (Hymenoptera: Aphidiinae) mummies? - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Thermal Biology Année : 2007

Does thermal-related plasticity in size and fat reserves influence supercooling abilities and cold-tolerance in Aphidius colemani (Hymenoptera: Aphidiinae) mummies?

Résumé

(1) The parasitoid Aphidius colemani was reared at 15 or 25 1C to induce variation in size and fat reserves; SCP and cold-tolerance were compared. Insects from both temperatures were also exposed to constant or fluctuating cold-exposure. (2) The lower SCP in mummies reared at 25 1C may be partially explained by their smaller size, a negative relationship being observed between SCP and size. (3) A bimodality was observed in SCP distributions, with two modes around 26 and 22 1C, likely because of presence/absence of gut content. (4) The type of exposure had a striking impact, mortality being considerably lower under fluctuating regime. (5) While energy storage is an important factor, vulnerability to chill-injury is supposed to be the primary factor regulating survival at low temperature.

Dates et versions

hal-00168123 , version 1 (24-08-2007)

Identifiants

Citer

Hervé Colinet, Philippe Vernon, Thierry Hance. Does thermal-related plasticity in size and fat reserves influence supercooling abilities and cold-tolerance in Aphidius colemani (Hymenoptera: Aphidiinae) mummies?. Journal of Thermal Biology, 2007, 32 (7-8), pp.374-382. ⟨10.1016/j.jtherbio.2007.03.005⟩. ⟨hal-00168123⟩
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