>Rick asks:  We hear that the beneficial fat profile is optimally >obtained
from deeper, cold water species.  If we assume that >the fish most available
to some paleo populations was >freshwater and/or from shallow water (and I
know that is a >proposition rather than a fact), does the profile differ
that
>much from wild mammals?

in fish PUFAs can be up to 20% of total flesh lipids, and 100% within the
liver. most of this will be the beneficial Om-3s. the ratio of MUFA to SFA
seems to be much greater. in salmon it is 2:1, where 1:1 is probably closer
in land mammals. at any rate sea mammals were also prized, so that
complicates it somewhat.

andrew