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Researching High-flying Bar-headed Geese

Featuring Jessica Meir, Ph.D.
© Sandeep Somasekharan View Large

Twice a year, Bar-headed Geese migrate over the Himalayas, the tallest mountains on the planet. Flying requires ten to twenty times more oxygen than resting. Yet at this altitude, there’s only half to one-third of the oxygen. Animal physiologist Jessica Meir says these amazing birds utilize “a suite of physiological responses and adaptations that allows this high altitude flight.”

Full Transcript

Transcript: 

BirdNote®

Researching High-flying Bar-headed Geese

Featuring Jessica Meir, Ph.D.

Interview and story by Eileen Bolinsky

This is BirdNote!

[Calls of Bar-headed Geese and wind]

High in the sky fly Bar-headed Geese.  Twice a year, these amazing birds migrate over the Himalayas, the tallest mountains on the planet. Flying requires ten to twenty times more oxygen than resting. Yet at this altitude there’s only half to a third of the oxygen.

[Calls of Bar-headed Geese and wind]

Bar-headed Geese are adapted to fly in low oxygen conditions. They have larger lungs and breathe more efficiently than other birds. Their hemoglobin, the protein that carries oxygen in the blood, also binds oxygen more tightly than that of other birds. 

But animal physiologist Jessica Meir [MEER] says these adaptations don’t tell the full story. 

“It’s really a suite of physiological responses and adaptations that allows this high altitude flight.”

Meir and her colleagues at the University of British Columbia trained Bar-heads to fly in a wind tunnel. The birds wore masks to measure oxygen and CO2 during flight. Tiny backpacks recorded their heart rate and measured oxygen and temperature in their bloodstream.  

“One thing that we wanted to look at was what relationship there would be between the heart rate and the oxygen consumption. We also wanted to look at the oxygen levels in the arteries and in the veins, in the blood vessels, so we could understand more about how the bird is capable of delivering oxygen during the flight.”

Meir is now analyzing her data. The results may someday offer clues for the medical treatment of humans who experience low levels of oxygen as a result of heart attacks, strokes, or other medical emergencies.

Find links to fascinating videos of Meir’s work, at birdnote.org. 

###

Bird sounds provided by The Macaulay Library of Natural Sounds at the Cornell Lab of Ornithology, Ithaca, New York. Calls of Bar-headed Goose [3519] recorded by A.L. Priori. 

Howling wind ambient from Gordon Hempton Essentials #5 -- QuietPlanet.com 

BirdNote’s theme music was composed and played by Nancy Rumbel and John Kessler.

Producer: John Kessler

Executive Producer: Chris Peterson

© 2013 Tune In to Nature.org    July 2013   Narrator:  Michael Stein       

ID# BHGO-01-2013-07-16 BHGO-01

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