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The roller coaster flight strategy of bar-headed geese conserves energy during Himalayan migrations.

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Title: The roller coaster flight strategy of bar-headed geese conserves energy during Himalayan migrations.
Authors: Bishop, C. M., Spivey, R. J., Hawkes, L. A., Batbayar, N., Chua, B., Frappell, P. B., Milsom, W. K., Natsagdorj, T., Newman, S. H., Scott, G. R., Takekawa, J. Y., Wikelski, M., Butler, P. J.
Source: Science (pre-March 2025). 1/16/2015, Vol. 347 Issue 6219, p250-254. 5p.
Subjects: Bird flight, Bar-headed goose, Heart beat measurement, Bird physiology, Goose migration, Caloric expenditure, Effect of altitude on birds
Geographic Terms: Himalaya Mountains
Abstract: The physiological and biomechanical requirements of flight at high altitude have been the subject of much interest. Here, we uncover a steep relation between heart rate and wingbeat frequency (raised to the exponent 3.5) and estimated metabolic power and wingbeat frequency (exponent 7) of migratory bar-headed geese. Flight costs increase more rapidly than anticipated as air density declines, which overturns prevailing expectations that this species should maintain high-altitude flight when traversing the Himalayas. Instead, a "roller coaster" strategy, of tracking the underlying terrain and discarding large altitude gains only to recoup them later in the flight with occasional benefits from orographic lift, is shown to be energetically advantageous for flights over the Himalayas. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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PubType: Academic Journal
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  Data: <searchLink fieldCode="AR" term="%22Bishop%2C+C%2E+M%2E%22">Bishop, C. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Spivey%2C+R%2E+J%2E%22">Spivey, R. J.</searchLink><br /><searchLink fieldCode="AR" term="%22Hawkes%2C+L%2E+A%2E%22">Hawkes, L. A.</searchLink><br /><searchLink fieldCode="AR" term="%22Batbayar%2C+N%2E%22">Batbayar, N.</searchLink><br /><searchLink fieldCode="AR" term="%22Chua%2C+B%2E%22">Chua, B.</searchLink><br /><searchLink fieldCode="AR" term="%22Frappell%2C+P%2E+B%2E%22">Frappell, P. B.</searchLink><br /><searchLink fieldCode="AR" term="%22Milsom%2C+W%2E+K%2E%22">Milsom, W. K.</searchLink><br /><searchLink fieldCode="AR" term="%22Natsagdorj%2C+T%2E%22">Natsagdorj, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Newman%2C+S%2E+H%2E%22">Newman, S. H.</searchLink><br /><searchLink fieldCode="AR" term="%22Scott%2C+G%2E+R%2E%22">Scott, G. R.</searchLink><br /><searchLink fieldCode="AR" term="%22Takekawa%2C+J%2E+Y%2E%22">Takekawa, J. Y.</searchLink><br /><searchLink fieldCode="AR" term="%22Wikelski%2C+M%2E%22">Wikelski, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Butler%2C+P%2E+J%2E%22">Butler, P. J.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 1/16/2015, Vol. 347 Issue 6219, p250-254. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Bird+flight%22">Bird flight</searchLink><br /><searchLink fieldCode="DE" term="%22Bar-headed+goose%22">Bar-headed goose</searchLink><br /><searchLink fieldCode="DE" term="%22Heart+beat+measurement%22">Heart beat measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Bird+physiology%22">Bird physiology</searchLink><br /><searchLink fieldCode="DE" term="%22Goose+migration%22">Goose migration</searchLink><br /><searchLink fieldCode="DE" term="%22Caloric+expenditure%22">Caloric expenditure</searchLink><br /><searchLink fieldCode="DE" term="%22Effect+of+altitude+on+birds%22">Effect of altitude on birds</searchLink>
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  Data: The physiological and biomechanical requirements of flight at high altitude have been the subject of much interest. Here, we uncover a steep relation between heart rate and wingbeat frequency (raised to the exponent 3.5) and estimated metabolic power and wingbeat frequency (exponent 7) of migratory bar-headed geese. Flight costs increase more rapidly than anticipated as air density declines, which overturns prevailing expectations that this species should maintain high-altitude flight when traversing the Himalayas. Instead, a "roller coaster" strategy, of tracking the underlying terrain and discarding large altitude gains only to recoup them later in the flight with occasional benefits from orographic lift, is shown to be energetically advantageous for flights over the Himalayas. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=100463120
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        Value: 10.1126/science.1258732
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        Text: English
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      Pagination:
        PageCount: 5
        StartPage: 250
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      – SubjectFull: Bird flight
        Type: general
      – SubjectFull: Bar-headed goose
        Type: general
      – SubjectFull: Heart beat measurement
        Type: general
      – SubjectFull: Bird physiology
        Type: general
      – SubjectFull: Goose migration
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      – SubjectFull: Caloric expenditure
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      – SubjectFull: Effect of altitude on birds
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      – SubjectFull: Himalaya Mountains
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              Text: 1/16/2015
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