Angelfish (Pterophyllum scalare) discriminate between small quantities: a role of memory.

Abstract

The ability to discriminate between sets of items differing in quantity has shown a growing interest in comparative studies as a diversity of animal species exhibit such quantitative competence. Previous studies with angelfish (Pterophyllum scalare) have demonstrated that this species is capable of spontaneously discriminating between fully visible groups… (More)
DOI: 10.1037/a0038228

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