≤10 % (maximum fraction beyond 7 hours 84%)
||Mitchell JG, Pearson L, Bonazinga A, Dillon S, Khouri H, Paxinos R. Long lag times and high velocities in the motility of natural assemblages of marine bacteria. Appl Environ Microbiol. 1995 Mar61(3):877-82. p.878 left column 3rd paragraphPubMed ID16534971
||P.877 right column 2nd paragraph:"To determine the fraction of marine bacteria that are motile at
a given time and how this community is influenced by changes
in nutrients, experiments were conducted on natural communities
of coastal marine bacteria."
||P.878 left column 3rd paragraph:"Motile cells in all treatments made up less than or equal to 10% of the community of visible bacteria during the first 7 h of the experiment, and 7 of 15 samples had no motile cells (Fig. 1). During this time, the motile-cell fraction in 1% TSB [Tryptic soy broth] was indistinguishable from that in the control seawater (Fig. 1b). Beyond 7 h, the motile fraction increased to a maximum of 84% (Fig. 1)."