Table 1.

Predicted and observed relative fitnesses

Antibiotic	Pure cultures			Mixed cultures
	μ, h−1*		Predicted relative fitness	μ, h−1*		Observed relative fitness
	Clmr.T5R	Tetr.T5S		Clmr.T5R	Tetr.T5S
Chloramphenicol	0.62	0.28	2.21	0.64	0.29	2.21
Tetracycline	0.30	0.59	0.51	0.30	0.59	0.51
Arithmetic mean			1.36			1.36
Harmonic mean			0.83			0.83
Geometric mean			1.06			1.06

Antibiotic concentrations are 0.12 μg/mL chloramphenicol and 0.55 μg/mL tetracycline.

^*SEs are less than 1.5% of all estimates.