The role of item size on choosing contrasted food quantities in angelfish (Pterophyllum scalare)

• Published in: Scientific reports Vol. 9; no. 1; pp. 15305 - 12
• Main Authors: Gómez-Laplaza, Luis M., Romero, Laura, Gerlai, Robert
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 25.10.2019; Nature Publishing Group
• Subjects: 631/477; 631/601/18; 64; Animals; Choice Behavior - physiology; Cichlids - physiology; Comparative studies; Experiments; Food; Food Preferences - physiology; Foraging behavior; Humanities and Social Sciences; multidisciplinary; Optimal foraging; Science; Science (multidisciplinary)

Comparative studies on quantity discrimination in animals are important for understanding potential evolutionary roots of numerical competence. A previous study with angelfish has shown that they discriminate numerically different sets of same-sized food items and prefer the larger set. However, var...