Drake J F, Tsuchiya H M
Appl Environ Microbiol. 1977 Jul;34(1):18-22. doi: 10.1128/aem.34.1.18-22.1977.
Colpoda steinii was grown in two-stage continuous cultures with Escherichia coli as prey species. The concentration of prey and the ciliate mean cell volume, dry weight, and number per milliliter were determined at known growth rates. Steady states were reached in the second-stage continuous cultures at all growth rates. Although changes occurred in mean cell size of the ciliates and in the number per milliliter at various growth rates, the yield of protozoan biomass per unit of prey consumed was constant at all growth rates. The data were compared with several equations proposed to describe the kinetics of protozoan growth as a function of prey density.
以大肠杆菌作为被捕食物种，在两阶段连续培养中培养施氏肾形虫。在已知生长速率下测定被捕食物种的浓度以及纤毛虫的平均细胞体积、干重和每毫升数量。在所有生长速率下，第二阶段连续培养均达到稳定状态。尽管在不同生长速率下纤毛虫的平均细胞大小和每毫升数量发生了变化，但每消耗单位被捕食物种所产生的原生动物生物量产量在所有生长速率下均保持恒定。将这些数据与几个提出的用于描述原生动物生长动力学作为被捕食者密度函数的方程进行了比较。
