LD50 for various animals (preliminary summary)

["Bjorn Cedervall" <bcradsafers@hotmail.com>]

First thanks to those who repsonded to my LD50 question for various 
organisms. What I obtained so far is essentially what follows below. I 
should however mention that the original sources were to some extent unclear 
but on the other hand - the same numbers showed up from different directions 
so I assume that the data below shouldn't be too far off (unless repeated 
mistakes or same erroneous reference?).

I had hoped to spend some time analyzing more sources but since several 
Radsafers already asked for a summary - I give what I have so far (this is 
most but I have omitted a few details). The list should probably be 
interpreted as "orders of magnitude and approximate ranges" rather than as 
some exact numbers. I will later also post the same (and perhaps updated 
summary) on my website as a reference. I have in a few cases simplified 
(like round-off) the information I got.

Most species are, as you can see, not defined more precisely (this is quite 
disturbing - take the difference between wasp and roach for instance - there 
are probably at least hundreds of different roach species living in very 
different environments - and who knows how many differents wasps there 
are?).

If anything seems wrong - please let me know. It is important to keep the 
data as correct as possible.

Data that were labeled "Sv" ("rem") have been interpreted as "Gy" ("rad"). 
Hope the translation into rad won't be a killer (LD50?) if necessary. Who 
has data for plants BTW?

Bjorn Cedervall   bcradsafers@hotmail.com
-----------------------------------------------------------------
LD50 values (in Gray)
Cattle                              5.3
Racoon                              ca 6
Rabbit                              ca 8
Pig                                 3-4
Guineapig                           2-4
Lab rat                             6-8
Mouse                               5-15
Mouse sperm (most sensitive stage)  0.6
Bat                                 150
Parakeet                            23
Pigeon                              20
Chicken                             6-16
Lizard (Uta stansburiana)           12-20
Colubrine snake (Coluber sp.)       3-4
Tortoise                            8.5-15
Frog                                7
Newt                                15 (-30)
Salmon                              15
Roach                               100
Wasp (Bacon sp.)                    ca 3000
Snail                               20-170
Fruit fly (Drosophila sp.)          ca 1000
Drosophila egg                      30
Beetle (Tribolium sp.)              1000
Daphnia sp.                         30
Paramecium                          3000
Ameba                               ca 1000

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