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- W2736703971 abstract "The autonomic stress response, often referred to as the ‘fight-or-flight’ response, is a highly conserved physiological reaction to stress in vertebrates that occurs via a decrease in parasympathetic (PNS) activity, which promotes self-maintenance ‘rest and digest’ processes, and an increase in sympathetic (SNS) activity, which prepares an animal for danger (‘fight-or-flight’). Though the PNS and SNS both innervate most organs, they often control different tissues and functions within those organs (though the pacemaker of the heart is controlled by both). Moreover the PNS and SNS are regulated independently. Yet until now, most studies of autonomic stress responses in non-model species focused only on the SNS response. We used external electrocardiogram loggers to measure heart rate and heart rate variability indexes that reflect PNS and SNS activity in a seabird, the Streaked Shearwater (Calonectris leucomelas), during the stress of handling, and during recovery in the nest burrow or during restraint in a cloth bag. We show for the first time in a free-living animal that the autonomic stress response is mediated primarily by a rapid decrease in PNS activity: handling stress induced a large and long-lasting depression of PNS ‘rest-and-digest’ activity that required two hours to recover. We also found evidence for a substantially smaller and shorter-lasting SNS ‘fight-or-flight’ response. Confinement in a cloth bag was less stressful for birds than handling, but more stressful than recovering in nest burrows. We show that quantifying autonomic activity from heart rate variability is effective for non-invasively studying stress physiology in free-living animals." @default.
- W2736703971 created "2017-07-31" @default.
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- W2736703971 date "2017-10-01" @default.
- W2736703971 modified "2023-10-16" @default.
- W2736703971 title "Heart rate variability reveals that a decrease in parasympathetic (‘rest-and-digest’) activity dominates autonomic stress responses in a free-living seabird" @default.
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- W2736703971 doi "https://doi.org/10.1016/j.cbpa.2017.07.007" @default.
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