Table 1.

Summary of growth experiments with cladocerans

Temperature	Treatment	Without competition			With competition
		μ [h−1]	Yield	p value	μ [h−1]	Yield	p value
25°C	Control	0.076	2.30 × 104	–	0.002	0.04 × 104	–
	50 clad	0.120	6.31 × 104	<0.01	0.068	2.99 × 104	<0.01
	150 clad	0.176	21.3 × 104	<0.01	0.166	14.9 × 104	<0.01
23°C	control	0.095	4.39 × 104	–	0.025	0.82 × 104	–
	50 clad	0.184	20.0 × 104	<0.01	0.088	11.3 × 104	<0.01
	150 clad	0.188	61.0 × 104	<0.01	0.095	10.3 × 104	<0.01
20°C	Control	0.128	10.8 × 104	–	0.106	13.8 × 104	–
	50 clad	0.134	69.8 × 104	<0.01	0.137	105 × 104	<0.01
	150 clad	0.130	61.0 × 104	<0.01	0.158	39.9 × 104	<0.01

Data indicate calculated growth rates (μ) and growth yield of V. cholerae non-O1/non-O139 without (control) and with (50 and 150) added cladocerans (clad)

All experiments were performed ‘with competition’ (2-μm filtered lake water) and ‘without initial competition’ (sterile filtered lake water) by the natural bacterial community

Each single μ and yield value is derived from one growth curve consisting of 12 consecutive sampling points

The p value indicates the significance of the difference in cell numbers between control and the cultures with cladocerans (paired T test; based on cell number data in logarithmic and stationary phase)