TABLE 1.

μ_max, K_s, yield, and calculated maximum uptake rate for H. vermiformis and A. castellanii feeding on five species of bacteria on AS agar at 20°C

Bacterial prey	H. vermiformis				A. castellanii
	μmax (h−1)	Ks (106 bacteria cm−2)	Yield (10−3 amoeba cell prey cell−1)	Maximum uptake rate (prey cells amoeba cell−1 h−1)	μmax (h−1)	Ks (106 bacteria cm−2)	Yield (10−3 amoeba cell prey cell−1)	Maximum uptake rate (prey cells amoeba cell−1 h−1)
E. coli K-12	0.064 (0.004)a	0.989 (0.297)	0.230 (0.216)	554	0.0626 (0.005)	0.8631 (0.356)	0.413 (0.391)	30
K. aerogenes	0.069 (0.003)	3.238 (0.489)	0.520 (0.030)	265	0.0633 (0.004)	2.921 (0.547)	0.022 (0.017)	575
P. aeruginosa	0.056 (0.004)	0.494 (0.194)	0.035 (0.015)	318	0.0509 (0.003)	0.253 (0.761)	0.033 (0.011)	308
S. aureus	0.038 (0.003)	0.023 (0.009)	0.006 (0.002)	1,532	0.0389 (0.003)	0.026 (0.009)	0.007 (0.004)	1,060
K. ozaenae	0.037 (0.003)	3.290 (0.259)	0.008 (0.004)	925	0.0259 (0.002)	5.999 (1.920)	0.005 (0.003)	1,036

^aThe values in parentheses are standard errors of the means.