Ref ID : 940
Nicola Ricci, Rosalba Banchetti, and R. Pelamatti; Reversible carnivory in Oxytricha bifaria: a peculiar ecological adaptation. Hydrobiologia 182:115-120, 1989
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The adaptive significance of the giant form of Oxytricha bifaria has been studied. It proved to be a carnivorous phase of a bacterivorous ciliate, rather than a cannibalistic one. By such a dramatic reversal in the feeding behavior O. bifaria, a primary consumer, can reversibly become a secondary one.