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Does hyperthermia constrain flight duration in a short-distance migrant?

journal contribution
posted on 2023-05-18, 21:48 authored by Guillemette, M, Woakes, AJ, Larochelle, J, Elias Polymeropoulos, Granbois, J-M, Butler, PJ, Pelletier, D, Peter FrappellPeter Frappell, Portugal, SJ
While some migratory birds perform non-stop flights of over 11 000 km, many species only spend around 15% of the day in flight during migration, posing a question as to why flight times for many species are so short. Here, we test the idea that hyperthermia might constrain flight duration (FD) in a short-distance migrant using remote biologging technology to measure heart rate, hydrostatic pressure and body temperature in 19 migrating eider ducks (Somateria mollissima), a short-distance migrant. Our results reveal a stop-and-go migration strategy where migratory flights were frequent (14 flights day−1) and short (15.7 min), together with the fact that body temperature increases by 1°C, on average, during such flights, which equates to a rate of heat storage index (HSI) of 4°C h−1. Furthermore, we could not find any evidence that short flights were limited by heart rate, together with the fact that the numerous stops could not be explained by the need to feed, as the frequency of dives and the time spent feeding were comparatively small during the migratory period. We thus conclude that hyperthermia appears to be the predominant determinant of the observed migration strategy, and suggest that such a physiological limitation to FD may also occur in other species.

History

Publication title

Royal Society of London. Philosophical Transactions. Biological Sciences

Volume

371

Issue

1704

Article number

20150386

Number

20150386

Pagination

1-8

ISSN

0962-8436

Department/School

Institute for Marine and Antarctic Studies

Publisher

Royal Soc London

Place of publication

6 Carlton House Terrace, London, England, Sw1Y 5Ag

Rights statement

Copyright 2016 The Author(s)

Repository Status

  • Restricted

Socio-economic Objectives

Marine biodiversity

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