Checking billy barr’s snow log…
The nonlinearity and arousal hypothesis predicts that highly aroused mammals will produce nonlinear, noisy vocalizations. We tested this prediction by measuring faecal glucocorticoid metabolites (GCMs) in adult yellow-bellied marmots ( Marmota flaviventris ), and asking if variation in GCMs was positively correlated with Wiener entropy—a measure of noise. Contrary to our prediction, we found a significant negative relationship: marmots with more faecal GCMs produced calls with less noise than those with lower levels of GCMs. A previous study suggested that glucocorticoids modulate the probability that a marmot will emit a call. This study suggests that, like some other species, calls emitted from highly aroused individuals are less noisy. Glucocorticoids thus play an important, yet underappreciated role, in alarm call production.
Knowledge graph centered on Scared and less noisy: glucocorticoids are associa with 12 nodes and 32 connections. Top connected: Marmota flaviventris, Daniel T. Blumstein, Fecal glucocorticoid metabolites in wild yellow-be, What is the sound of fear? Behavioral responses of, Parasites Are Associated With Noisy Alarm Calls.
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