Does thermal-related plasticity in size and fat reserves influence supercooling abilities and cold-tolerance in Aphidius colemani (Hymenoptera : Aphidiinae) mummies?
(2007) Journal of Thermal Biology — Vol. 32, n° 7-8, p. 374-382 (2007)
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- (1) The parasitoid Aphidius colemani was reared at 15 or 25 degrees C 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 degrees C 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 degrees C, 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. (c) 2007 Elsevier Ltd. All rights reserved.
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Colinet, H., Vernon, P., & Hance, T. (2007). 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, 32(7-8), 374-382. https://doi.org/10.1016/j.jtherbio.2007.03.005 (Original work published 2007)