Table - link
||William B. Whitman,*† David C. Coleman,‡ and William J. Wiebe. Prokaryotes: The unseen majority. Proc Natl Acad Sci U S A. 1998 June 9 95(12): 6580 table 4PubMed ID9618454
||Food and Agricultural Organization (1994) FAO Production Yearbook (Food and Agricultural Organization of the United Nations, Rome), 48.
||Organ contents in volume or grams of wet weight. For comparison, the volume of the human colon is 0.5 liter. For domestic birds, weight wet was calculated from a volume of 2 ml assuming that 1 ml - 1 g wet weight.