APPROACH AND WITHDRAWAL IN YOUNG OF TILAPIA MOSSAMBICA (CICHLIDAE, PISCES) AS A FUNCTION OF AGE AND SOCIAL EXPERIENCE

• Published in: Scandinavian journal of psychology 1972-09, Vol.13 (1), p.89-97
• Main Authors: Goude, Gunnar, Edlund, Björn, Engqvist-Edlund, Ulla, Andersson, Margareta
• Format: Article
• Language: English
• ISSN: 0036-5564; 1467-9450
• DOI: 10.1111/j.1467-9450.1972.tb00055.x

Goude G., Edlund B., Engqvist‐Edlund U. & Anderson M. Approach and withdrawal in young of Tilapia mossambica (Cichlidae, Pisces) as a function of age and Social experience. Scand. J. Psychol., 1972, 13, 89–97.—In an experiment with eight groups of young of Tilapia mossambica, approach and withdrawal behavior was registered during brief (5 min) periods of stimulation with a moving dummy; the experiment lasted twelwe days (towards the end and immediately after the sensitive period). Four of the groups comprised young which had been isolated from each other until the first stimulation period; in the other four groups the young had been kept together in the experimental tanks. The age of the young when first stimulated was varied experimentally. Changes in approach and withdrawal behavior over time were studied along with e.g. changes in group strength. Age at first stimulation was found to be of some consequence but no clear differences were obtained between groups with different environmental experiences.