This is an interesting topic. I hope Ioanna won’t mind if we get astray and comment briefly on it in her journal.
Before the appearance of cyanobacteria, the microorganisms capable to get the energy that runs them from sunlight by reduction of water and carbon dioxide and production of oxygen gas, all living organisms were a priori necessarily anaerobes.
http://en.wikipedia.org/wiki/CyanobacteriaUntil that event roughly 2 to 3 billions years ago,
http://www.nature.com/nature/journal/v455/n7216/full/nature07381.html oxygen was essentially a deadly poison for the then existing forms of life (microorganisms only ) and essentially absent in earth’s reducing atmosphere.
These ancient microorganisms that were obligate anaerobies had to die out with the appearance of cyanobacteria because of progressive build up of the latter ‘s highly « toxic waste product » namely O2.
Today the living organisms not only must have adapted to the presence of oxygen but indeed many of them either heavily depend on it’s presence., in particular all the multicellular organisms , or use it preferentially whenever it’s possible because it has much much higher energetic efficiency.
The attempt to classifiy the now existing microorganisms as anaerobes or aerobes is thus probably vain. These organisms are actually capable to adapt to very different conditions and obtain their energy either from anaerobic glycolysis when oxygen is not available (in alcoolic or acetic fermentations for instance) or from aerobic complete oxidation of glucose and fatty acids when oxygen is available (at the surface of ageing or drying meat) . Even our own cells are capable to adapt in this way for instance muscle cells in intense brief effort (anaerobic glycolysis) versus prolonged and more moderate effort ( complete aerobic oxidation of fatty acids and glucose). It is also interesting to note that rapidly proliferating cells such as yeast or cancer cells must work in anaerobic mode because they cannot completely oxidize their glucose or fatty acids whose partial metabolic products are needed as cell construction material.
I’m inclined to believe that even the attempt to classify bacteria or microorganisms as good or bad is probably often vain too. Just think of a microorganism such as candida albicans.. All healthy humans (women) shelter it in their gut (vagina) and this is good so but this becomes bad in SAD poisoned people by change of the « terrain » and proliferation at the expense of other normally present microorganisms .
As to aged, dried or fermented meat I also agree, Paleo Phil, that this is probably best done in the presence of air. Much more tasty, no offensing smell. Yet does this mean that anaerobic fermentation of meat or fish results necessarily in an unhealthy food ? Apparently not. Just think about some traditional fermented fish foods in Sweden or eaten by natives of Canadian Pacific coasts or just fermented cod liver oil. Also in meat drying in air anaerobic bacteria are probably at work in bulk.