|| 要旨トップ | 目次 |||日本生態学会第65回全国大会 (2018年3月、札幌) 講演要旨
一般講演（口頭発表） H02-06 （Oral presentation）
Cooperatively breeding group comprises the dominant breeders and helpers assisting rearing of young. The dominance hierarchy of members can cause differential fitness gains from group living which in turn affect the level of help subordinates can afford. Communal roosting by avian cooperative breeders functions to reduce energy loss via thermoregulation but such benefit can depend on the individual position in the roosts. We studied communal roosting in Pomatostomus ruficeps. The first bird to enter the roost was not fixed, while males were earlier than females to enter. The dominants exited later than others in the morning. These results suggest subordinate females remain near the entrance. Energetic loss of the females associated with this roosting order warrants further investigation.