IS THE TESTING OF TFT STRATEGY DURING PREDATOR INSPECTIONS POSSIBLE BY USE OF MIRROR-IMAGE - A REVIEW AND SOME CONTROLS OF RECENT STUDIES

In order to answer some of the questions concerning the ''inadequacies '' of mirror-images in experiments examining co-operative behaviour du ring predator inspection, several control experiments were carried out . The average positions (distance from predator's tank) of guppies was influenced by the presence of a preadator, but the effect of previous experience with a predator was manifestated only in the presence of p redator. The average position of guppies also depended on the mirror-t reatment (changing the length and position) but it was influenced only by the length but not the angle of mirror. The relative independence of the position of the mirror observed in the guppies' behaviour chall enges the basic assumption (i.e. closer to predator by long parallel t han short angled mirror) is indeed the result of TFT as interpreted ea rlier. Instead, the effect of mirror treatment appears superpositioned on the predator inspection as an idependent variable. In light of tho se results we discuss the usefulness of mirror systems in testing pred ator inspection as TFT-like behaviour.