TRANSFER AND ISOLATION EFFECTS ON THE FEEDING-BEHAVIOR OF THE ANGELFISH, PTEROPHYLLUM-SCALARE

The feeding behaviour of juvenile angelfish (Pterophyllum scalare) has been used as an indicator of their recovery following handling and tr ansfer to a new environment, both with and without conspecifics. Isola ted specimens fed less readily than group-housed fish, or those transf erred to the test aquaria in groups of three or five. and continued to do so for at least ten days following isolation. Feeding rank-order f requently changed following isolation, suggesting that better foragers may not take the greatest risks in isolation.