The energetics of New Zealand's ducks.

摘要: Abstract Measurements on rates of metabolism and temperature regulation are presented from nine populations seven species ducks resident in New Zealand. An analysis these data those 18 additional obtained the literature indicates that basal rate anatids correlates with body mass restriction to Australian–New Zealand region: ‘southern’ have average 70% Northern Hemisphere. The low southern may reflect reduced pectoral muscle masses association absence migratory habits and/or life land without eutherian predators. flightless teal (Anas aucklandica nesiotis, Anas aucklandica) do not mass-independent differ found flighted living same region, although lower total than most as a result small masses. Minimal thermal conductance this sample is determined by alone. Regulated negatively correlated mass.