...-altitude resident Andean geese that could minimize the cost of breathing more deeply. We compared these two species with a low-altitude migratory species, the barnacle goose ( Branta leucopsis ). We ventilated anesthetized birds to measure mechanical properties of the respiratory system and used CT scans...

... fractional composition of inspired oxygen ( F i O 2 : 0.21, 0.12, 0.09, 0.07 and 0.05) was made on bar-headed geese reared at either high altitude (3200 m) or low altitude (0 m) and on barnacle geese ( Branta leucopsis ), a low-altitude migrating species, reared at low altitude (0 m). Bar-headed geese reared...

... trained barnacle geese Branta leucopsis (mean mass 2.1 kg) and bar-headed geese Anser indicus (mean mass 2.6 kg) to walk inside a respirometer on a treadmill and to fly in a wind tunnel with a respirometry mask at a range of speeds. We measured f H and V̇ O 2 simultaneously during walking on the treadmill...

...Katie E. Deaton; Charles M. Bishop; Patrick J. Butler ABSTRACT The hypothesis that tissue-specific levels of thyroid hormones may be required for normal locomotor muscle development was investigated in the barnacle goose Branta leucopsis . Hypothyroidism was induced in goslings by treatment...