期刊
ETHOLOGY
卷 117, 期 4, 页码 345-355出版社
WILEY
DOI: 10.1111/j.1439-0310.2011.01878.x
关键词
-
资金
- Grant Agency of Charles University [181/2005/B-Bio, 151607/2007/B-Bio, 147610/2010/B-Bio]
- Ministry of Education, Youth and Sport of the Czech Republic
- Academy of Sciences of the Czech Republic
- Ministry of Environment of the Czech Republic
- Ministry of Culture [MSMT 0021620828, 261215/2010, AV0Z60930519, KJB 601110803, VaV SP/2D3/60/08, MK00002327201]
- Research Centrum project [LC06073]
Vigilance is a behavioural tactic that allows individuals to control their surroundings and to assess predation risk. In contrast, sleep is unique behavioural state with widely hypothesized restorative and energy-saving functions, but reducing attentiveness and increasing susceptibility to predation. Sleeping birds resolve this conflict by interrupting sleep with short periods of eye opening (termed 'scans') during vigilant sleep. Miscellaneous environmental factors and sleeping postures may affect the perception of risk and corresponding vigilance level. Here, we investigated the influence of nest vegetation concealment, time of day and sleeping postures on the sleep/vigilance trade-off in incubating Mallards (Anas platyrhynchos). We found that incubating females increased their vigilance with increasing nest vegetation cover facing the vigilant eye during both the day and the night periods; however, mean nest vegetation concealment did not affect female vigilance. Females also reduced their total vigilance along with scan frequency during the night period, while displaying the opposite pattern during the daylight. The rest-sleeping position was preferred more during the night compared with the daylight period, and females were more vigilant in this position at night. Our data show that the nest vegetation concealment regardless of visual abilities during different light conditions, time of day and sleeping posture play an underlying role in antipredator vigilance during sleep in this cryptic ground-nesting bird.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据