This figure is reproduced from Bishop et al. (2015). It illustrates a 15 hour-lo

Question

This figure is reproduced from Bishop et al. (2015). It illustrates a 15 hour-long flight trajectory for bar- headed goose #38 flight D. What did this bar-headed goose not fly a straight-line path across the Himalayas on its northbound migration? Which path is more costly, and why? Give as many important details as possible in your answer. Goose 38 flight d Alternative gradual ascent (mean altitude 3890m) Altitude (m) 2000 3000 4000 Mean altitude=2607m. Analysis confined to 15.2 hour flight section Total ascent=6340m Total descent=4950m Net height gain=1390m 0 2 4 6 8 10 12 14 16 18 Time (hours)

Explanation / Answer

The gradual elivated flight shown by this bird is obiviously more costly because bird have to gain height gradually for a period ( instead of gain og height once & then just maintained the height which requires less energy) to avoid collision with mountain peak,

Physiological reason --

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