. Author manuscript; available in PMC: 2014 Sep 10.

Published in final edited form as: Radiat Res. 2013 Aug 14;180(3):231–234. doi: 10.1667/RR3321.1

TABLE 1.

LD₅₀ Values for Human Populations for Number of Different Animal Species

Species	LD₅₀	Reference
Ferret	<2 Gy	Harding (9)
Pigs^a (4 strains)	2.57 Gy	Morris and Jones (2)
Dogs^a (11 strains)	2.62 Gy	Morris and Jones (2)
Primates^a (8 strains)	4.61 Gy	Morris and Jones (2)
Mice^a (49 strains)	8.16 Gy	Morris and Jones (2)
Humans	3–4 Gy^b	Hall and Giaccia (7)

The actual LD₅₀ values for the animal strains were determined experimentally in the studies reviewed by Morris and Jones (2), averaged values are presented here.

For young adults without medical invention; may be less for the very young or the old.