SLEEP-VIGILANCE TRADE-OFF IN GADWALL DURING THE WINTER PERIOD

@inproceedings{GauthierClerc2000SLEEPVIGILANCETI,
  title={SLEEP-VIGILANCE TRADE-OFF IN GADWALL DURING THE WINTER PERIOD},
  author={Michel Gauthier‐Clerc and Alain Tamisier and Frank C{\'e}zilly},
  year={2000}
}
Abstract We studied vigilance while sleeping in wintering Gadwalls (Anas strepera) in the Camargue (southern France) during the 1992–1993 and 1994–1995 winters. Vigilance while sleeping was reduced at the beginning and at the end of the winter. During mid-winter, birds in sleeping posture showed the highest level of vigilance, with longer peeks and shorter interpeek intervals. There was no effect of sex on the intensity of vigilant sleep, nor on changes in the pattern of vigilant sleep across… 

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References

SHOWING 1-10 OF 38 REFERENCES

Sleep-vigilance trade-off in Green-winged Teals (Anas crecca crecca)

TLDR
The relationship between flock size and peeking rate was investigated, using field observations and controlling for the effects of other variables with which vigilance previously has been reported to be correlated: sex, date, time of day, distance from shore, and predator presence.

Electrophysiological and behavioral correlates of sleep in the blackbird (Turdus merula)

Sleep changes in emperor penguins during fasting.

The proportion and the distribution over 24 h of the different arousal stages characterized in emperor penguins [wakefulness (W), drowsiness (D), slow-wave sleep (SWS), and paradoxical sleep (PS)]

Sleep changes in long-term fasting geese in relation to lipid and protein metabolism.

TLDR
There were important changes in SWS and D in relation to the periods of fasting that were previously found to correspond to changes in lipid and protein utilization, and these reactions are examined for their implications in energy-saving and sleep mechanisms.

The problem of vigilance in animal life.

TLDR
Three types of strategy are described which function to offset the neural limitations on vigilance and these are: neural mechanisms, individual behavioural strategies, and social strategies.

A Synthesis of Sleep in Wild Birds

TLDR
This synthesis tries to survey and reanalyse the current literature concerning bird sleep and suggests a model based on eyelid blinking which allows for a degree of vigilance during sleep but which is also compatible with minimizing energy expenditure.

Wintering strategies and breeding success: hypothesis for a trade-off in some waterfowl species

TLDR
It is predicted that, at a specific level, the heaviest and/or the first birds to arrive at the winter quarter are the first to pair and have the best reproductive success during the following breeding season.

Activités diurnes du canard Chipeau pendant son hivernage en Camargue. Relations avec les variables environnementales et sociales

Diurnal activity budgets of Gadwall Anas strepera L. wintering in the Camargue (Southern France) are analysed from October 1985 to March 1986 in relation to some environmental and social