Table 5.

Summary of physiological resistance of the Antarctic and Ice krill species to thermal shocks (adapted from Cascella et al. 2015): CTmax and temperature affecting swimming behavior represent the thermal limit at which 50% of the tested individuals have died or have fallen onto the bottom, respectively, following a regular increase of temperature of 0.1°C per minute from an initial temperature of −1°C

Species	Habitat	Depth (m)	Maximum in situ temperature (°C)	CTmax (°C)	Temperature affecting the swimming behavior (°C)	Hsp70 gene expression during thermal shock
E. superba	Offshore waters	0–3000	4–5	15.8	8–9	No overexpression at 3 and 6°C for 3 to 6 h
E. crystallorophias	Shelf waters	0–500	0–1	14.7	1–2	Overexpression after 3 h at 6°C