Thirteen-lined ground squirrel (Sciuridae: Spermophilus tridecemlineatus) antipredator vigilance decreases as vigilance cost increases
Article Abstract:
A study was conducted to determine the association of visual obstructions and antipredator vigilance. The behavior of thirteen-lined ground squirrels which were placed in Plexiglas boxes of varying length to forage was observed. Results indicate that in conditions of visual obstruction and heightening vigilance costs, the thirteen-lines squirrels reduced their predator vigilance under relatively high predator risk. It was also revealed that the squirrels sacrificed antipredator vigilance for increased food intake.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1999
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Juvenile Richardson's ground squirrels, Spermophilus richardsonii, discriminate among individual alarm callers
Article Abstract:
Animal response to alarm calls was investigated in juvenile Richardson's ground squirrels, Spermophilus richardsonii, to determine alarm discrimination among these animals. Results indicate that alarm calls from neighbors elicited greater vigilance in the recipient squirrel. However, the recipient exhibited habituation after repeated calls from the same individual. The level of vigilance is restored with a call from another individual.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1998
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Functional morphology of Richardson's ground squirrel, Spermophilus richardsonii, alarm calls: The meaning of chirps, termed whistles and chucks
Article Abstract:
Repetitive alarm vocalizations of Richardson's ground squirrels vary in terms of acoustic structure of their primary syllables, whistles and chirps, and the inclusion of brief, lower-amplitude, frequency-modulated trailing elements, termed chucks. Multiple acoustic parameters of Richardson's ground squirrel alarm vocalizations thus interact and communicate information regarding several aspects of a predator encounter.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 2005
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