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- W2002597766 abstract "Within the frame of a captive-breeding programme for the conservation of the houbara bustard (Chlamydotis undulata), we performed behavioural observations on houbara in captivity and studied the effect of photoperiod and temperature on activity patterns. Twenty adult male houbara were allocated to four groups: 12L:12D at 20°C or 30°C, 8L:16D at 20°C and 16L:8D at 20°C. The temperature was constant and food and water were available ad libitum. The birds were observed for 96 h and behaviour was analysed for locomotor activity and feeding. Both behaviours were distributed in two bouts of high activity in the morning and in the afternoon. At high temperature, the activity pattern was enhanced through an increased midday resting period and reduced food intake was associated with less total feeding activity. Short days contracted the patterns, while long days extended them. Total activity during the day was not modified by daylength, which in short days resulted from a significantly increased activity per hour of light. The evening feeding peak and the increased alertness of the birds at the end of the night revealed an anticipation of both dawn and dusk. Observations of houbara in the wild have shown bimodal patterns of activity, which have been related to diurnal fluctuations in temperature and food availability. Our results show that the distribution of activity in two bouts constitutes in the houbara a response to inner behavioural or nutritional requirements, independent from daily changes in environmental conditions." @default.
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- W2002597766 date "1997-12-01" @default.
- W2002597766 modified "2023-09-25" @default.
- W2002597766 title "Diurnal behavioural patterns in the houbara bustard (Chlamydotis undulata) in captivity: effects of temperature and daylength" @default.
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- W2002597766 doi "https://doi.org/10.1016/s0168-1591(96)01190-2" @default.
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