Marine life: Gennadas - annual dose of 26 Sv from natural 210Po

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

I am reading a Proceedings paper from the ICRR meeting in Dublin in 1999. 
The Gennadas individual with the highest "wholebody dose" gets a calculated 
annual dose to its hepatopancreas of 26 Sv due to natural polonium 210 (5700 
Bq 210Po/kg, whole body wet weight). Besides all the aspects of applying 
dose factors (Gy->Sv) to animals - I have a few questions/reflections:

First - what is Gennadas? It says "shrimp" in the article but could this be 
right when Gennadas belongs to Decapoda (Fam. Benthesicymidae). Could it be 
a crab? Can anyone give an appropriate non-scientific word in English? I did 
some search on the Internet and got the taxonomy above but no names.

Second - I find this interesting as there are some people working on how to 
construct new regulations to protect other species (as commented here at 
Radsafers a couple of weeks ago). The aspects to consider include 1/ 
Individual vs. population  2/ Scale of body 3/ Population dynamics 4/ 
Taxonomy (the level has relevance for any discussion of "threatened 
species").

My personal reflections and ideas only,

Bjorn Cedervall   bcradsafers@hotmail.com

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