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Is faster fuelling the key to faster migration?

According to Åke Lindström, Thomas Alerstam and Anders Hedenström it is. In a new paper in Nature Climate Change they challenge another recent paper by Schmaljohann and Both concluding that there is little scope that birds can migrate faster to keep up with the advancing spring, explicitly by reducing the time spent at stopovers (periods of fuelling).
flying birds
Photo: Björn Malmhagen

In the new paper, the authors argue that Schmaljohann and Both make two general mistakes and that their main conclusion is unjustified. The first issue is their calculation of total migration speed and stopover duration. The second is that they focus on the secondary factor, stopover duration, instead of fuelling rate, which is of primary importance.

To the paper "Faster fuelling is the key to faster migration".

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Centre for Animal Movement Research
Evolutionary Ecology, Department of Biology
Ecology building S-223 62 Lund Sweden

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