Energy consumption and growth in the suctorian Podophrya fixa (Protozoa: Suctoria)



Energy consumption and growth in Podophrya fixa fed on Colpidium campylum is described in relation to prey density at 15°C. The volume of food consumed was linearly related to the volume of food captured. Both energy consumption and growth increased up to a prey density of 30 colpidia per Podophrya, thereafter declining. Gross growth efficiencies ranged between 49.9%-65.8%.