Abstract
The emu is a large flightless bird (body mass, BM, about 40 kg), whose range extends into the arid regions of Australia. Its water relations were studied by examining the water turnover and the distribution of body water before and after 9 days of water restriction, when only dry feed was provided. Initially water turnover was 44.8 ml kg−1 d−1 but with restriction of intake water balance was not maintained. Although efflux was reduced to 14.8 ml kg−1 d−1 the net water loss was still about 7 ml kg−1 d−1.
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