Changes in exploration from courtship to the breeding state in red-rumped parrots (Psephotus haematonotus).
Animals explore their environment to gather information about feeding areas, resting places, or suitable territories for reproduction. During the annual cycle seasonal variation in exploration occurs at least in some species. In this study, exploratory behaviour of red-rumped parrots (Psephotus haematonotus) was investigated during part of the reproductive period including courtship and incubation. On 2 test days 14 pairs in either the courtship or the breeding state were confronted with three unknown objects in their familiar aviary for 6 h on each of 2 days. Test days were separated by a 2-day pause. Exploration by the males did not change from courtship to breeding, whereas in females latency to first contact increased, and duration of exploration and the number of objects touched decreased from courtship to breeding state. Considering the pair as a unit, the total duration of exploration was shorter in breeding pairs than in pairs during courtship. Changes in exploration from the first to the second day of object exposure occurred in both sexes. Males explored longer on the second day, females contacted the objects significantly later on the second day but showed no significant changes in duration of exploration. The changes in exploration might be due to changed cost/benefit considerations during courtship and breeding.
Forschungsstelle für Ornithologie der Max-Planck-Gesellschaft, Arbeitsbereich Biologische Rhythmen und Verhalten, Institut für Verhaltensbiologie, Freie Universiteit Berlin, Von-der-Tann-Strasse 7, D-82346, Andechs, Germany
C
Mettke-Hofmann