Cookies Policy
X
Cookie Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Full Access Joint tail and vocal alarm signals of gray squirrels (Sciurus carolinensis)

MyBook is a cheap paperback edition of the original book and will be sold at uniform, low price.

Joint tail and vocal alarm signals of gray squirrels (Sciurus carolinensis)

Full text article:

  • PDF
  • HTML
Add to Favorites

image of Behaviour

Threat-specific vocalizations have been observed in primates and ground squirrels, but their contemporaneous usage with visible signals has not been experimentally analyzed for association with threat type. Here we examine the eastern gray squirrel, an arboreal squirrel that uses both vocal and tail signals as alarms. Squirrels were presented with cat and hawk models simulating natural terrestrial or aerial predator attacks and also with control objects that do not resemble predators but approach in a similar manner. Individuals responded with tail signals (twitches and flags) and vocalizations (kuks, quaas and moans), but only flags and moans are associated with predator type. Moans were elicited primarily by aerial stimuli and flags by terrestrial stimuli. Eastern gray squirrels use an alarm-signaling system in which signals in each modality potentially are associated with particular attributes of a threat or may be general alarms. Terrestrially-approaching stimuli yielded vocal and tail alarm signals regardless of whether the stimulus resembled a predator. With aerially-approaching stimuli, however, quaas were used more often when the stimulus resembled an aerial predator than when it did not. An approaching object’s physical appearance may therefore affect squirrels’ responses to aerial, but not terrestrial, objects. When the stimuli resembled real predators approaching in the natural manner (terrestrially or aerially), both tail flags and vocal moans were associated with predator type, so we also considered moans and flags together. The presence and absence of moans and flags in an alarm signaling bout yields a higher statistical index of predictive association as to whether the threat is aerial or terrestrial than does either component alone.

Affiliations: 1: Department of Biology, University of Miami, 215 Cox Science Center, 1301 Memorial Drive, Coral Gables, FL 33124-0421, USA

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Create email alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Name:*
    Email:*
    Your details
    Name:*
    Email:*
    Department:*
    Why are you recommending this title?
    Select reason:
     
     
     
     
    Other:
     
    Behaviour — Recommend this title to your library

    Thank you

    Your recommendation has been sent to your librarian.

  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation