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Résumé :
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We report on the use of artificial eggs, fitted with highly sensitive microphones to record the resting heart rates of Adi lie Penguins (Pygoscelis adeliae). Artificial eggs were developed to quantify the effects of recording heart rate in penguins using electrocardiogram (ECG) units attached externally to the penguins. We found the resting heart rates of penguins recorded using artificial eggs were indistinguishable from those recorded using ECG units. Artificial eggs are a useful tool for quantifying the effects of other, more invasive techniques such as attaching ECG units. Artificial eggs are also potentially useful in physiology and energetics studies because they are simple to use, are relatively inexpensive to construct and operate, and are comparatively non-invasive to the birds. Nevertheless, some limitations of the operation and application of artificial eggs are discussed.
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