|| 要旨トップ | 目次 |||日本生態学会第66回全国大会 (2019年3月、神戸) 講演要旨
一般講演（ポスター発表） P1-067 （Poster presentation）
Pelagic seabirds are well studied for their behavioural and physiological adaptation to long distance flight, minimising energetic input while covering vast distances. These adaptations allow for low-cost flight with little flapping effort, generating lift from wind. However, relatively little is known about the foraging methods of these animals. Data from video and acceleration loggers attached to streaked shearwaters (Calonectris leucomelas) show a previously unreported foraging behaviour of dive bouts involving multiple landings (1.124s mean duration) separated by short take-offs (0.531s mean duration). Behaviour start and end times were derived from video footage and the corresponding acceleration signals were analysed. These results show that streaked shearwaters take-off from the water surface many times in quick succession whilst foraging. Take-off is an energetically costly behaviour involving high frequency flapping that reduces flight efficiency and so affects potential trip duration. These findings suggest current estimates of foraging trip energy usage may underestimate the true energy requirement of foraging behaviour. These findings detail streaked shearwater foraging behaviour at scales often overlooked by data loggers recording at lower frequencies. Therefore, this study provides behavioural context that can update estimates of studies investigating seabird energy budgets.