Alarm Calls Affect Foraging Behavior in Eastern Chipmunks (Tamias striatus, Rodentia: Sciuridae)

Ethology ◽  
2000 ◽  
Vol 106 (12) ◽  
pp. 1057-1066 ◽  
Author(s):  
Jessica K. Baack ◽  
Paul V. Switzer
Keyword(s):  
Foraging Behavior ◽  
Alarm Calls ◽  
Tamias Striatus ◽  
Eastern Chipmunks

Assessing anti-predator decisions of foraging eastern chipmunks under varying perceived risks: the effects of physical and social environments on vigilance

Behaviour ◽  
2017 ◽  
Vol 154 (2) ◽  
pp. 131-148 ◽  
Author(s):  
Jeanne Clermont ◽  
Charline Couchoux ◽  
Dany Garant ◽  
Denis Réale
Keyword(s):  
Risk Taking ◽  
Perceived Risk ◽  
Alarm Calls ◽  
Social Environments ◽  
High Wind ◽  
Playback Experiments ◽  
Environmental Sounds ◽  
Tamias Striatus ◽  
Eastern Chipmunks ◽  
Wind Intensity

Animals foraging under risk have to trade-off resource acquisition and predator avoidance. Environmental factors can modulate the level of risk and should thus influence the expression of anti-predator behaviours such as vigilance. In this study, we investigated the effects of physical and social environments on eastern chipmunks’ (Tamias striatus) vigilance, by varying the perceived risk through playback experiments of alarm calls and neutral environmental sounds, and by integrating habitat and weather characteristics, as well as neighbour density. Chipmunks showed higher levels of vigilance when foraging in more open habitats, under high wind conditions, when they heard alarm calls and when surrounded by a high neighbour density. The effects of wind intensity and neighbour density on vigilance were also stronger during the broadcast of alarm calls rather than neutral sounds. Our results emphasize how both the physical and social environments can modify risk perception and therefore risk-taking decisions of foraging individuals.

Response of eastern chipmunks to conspecific alarm calls

1995 ◽  
Vol 49 (1) ◽  
pp. 81-93 ◽  
Author(s):  
Daniel M. Weary ◽  
Donald L. Kramer
Keyword(s):  
Alarm Calls ◽  
Eastern Chipmunks

Hibernation of eastern chipmunks (Tamias striatus) maintained under controlled conditions

1972 ◽  
Vol 50 (1) ◽  
pp. 95-105 ◽  
Author(s):  
Grace Workman Scott ◽  
Kenneth C. Fisher
Keyword(s):  
Temperature Sensors ◽  
Endogenous Rhythm ◽  
Bottom Temperature ◽  
Tamias Striatus ◽  
Controlled Conditions ◽  
Eastern Chipmunks ◽  
First Time ◽  
Periodic Arousals

The hibernation pattern of captive eastern chipmunks maintained under controlled conditions of light and temperature was examined. It was consistent with the view that hibernation results from an endogenous rhythm with a periodicity of about a year, probably temperature independent.Continuous recording from nest bottom temperature sensors was tested for the first time with this species and found to be more accurate than the sawdust technique for detecting arousals. It also provided useful information about trends in body temperature.The hypothesis that a shift in the temperature at which heat-producing responses are mobilized occurs during hibernation and that it is responsible for the pattern of periodic arousals, is discussed in relation to the observations made.

Reproductive biology, breeding seasons, and growth of eastern chipmunks, Tamias striatus (Rodentia: Sciuridae) in Canada

1972 ◽  
Vol 50 (8) ◽  
pp. 1069-1085 ◽  
Author(s):  
Lorraine C. Smith ◽  
Donald A. Smith
Keyword(s):  
Reproductive Age ◽  
Adult Size ◽  
Museum Specimens ◽  
Adult Males ◽  
Tamias Striatus ◽  
Breeding Condition ◽  
Eastern Chipmunks ◽  
June July ◽  
Breeding Seasons ◽  
Size Data

Reproductive, age, and body-size data from 1403 museum specimens from Manitoba to Nova Scotia and data on live chipmunks studied in the field in southeastern Ontario were analyzed. Schedules of the major stages of reproduction and growth are summarized graphically. Most adult males are in breeding condition (with large testes in black scrotal sacs and macroscopic tubules in caudae epididymidon) from March to June. As females can breed in March–April and (or) June–July, eastern chipmunks are unique among hibernating sciurids in that they have two breeding seasons per year. These occur over much of the Canadian range, with distinct waves of young appearing above ground in June and September. Spring breeding is probably annual and ubiquitous but records are too few to reveal the local frequency of summer breeding. Young have emerged in four consecutive Septembers at Stanley Corners, Ontario. Litter sizes from embryo and scar counts averaged 4.8 and 4.9. Although the young attain adult size and dentition in 3 months, most do not breed until 11 months old. We have questioned or explained conflicting reports and conclude that the breeding habits of Canadian chipmunks are essentially similar to those described by some U.S. workers.

scholarly journals Highly divergent 18S rRNA gene paralogs in a Cryptosporidium genotype from eastern chipmunks (Tamias striatus)

2015 ◽  
Vol 32 ◽  
pp. 113-123 ◽  
Author(s):  
Brianna L.S. Stenger ◽  
Mark E. Clark ◽  
Martin Kváč ◽  
Eakalak Khan ◽  
Catherine W. Giddings ◽  
...  
Keyword(s):  
18S Rrna ◽  
18S Rrna Gene ◽  
Rrna Gene ◽  
Tamias Striatus ◽  
Eastern Chipmunks

Agonistic interactions among wild eastern chipmunks (Tamias striatus)

1979 ◽  
Vol 57 (3) ◽  
pp. 683-690 ◽  
Author(s):  
B. T. Aniskowicz ◽  
J. Vaillancourt
Keyword(s):  
Field Data ◽  
Agonistic Behaviour ◽  
Agonistic Interactions ◽  
Free Living ◽  
Tamias Striatus ◽  
Eastern Chipmunks ◽  
Established Population

Agonistic behaviour exhibited by free-living chipmunks (Tamias striatus) in a naturally established population at Heney Lake, Quebec, was grouped into 11 categories and combinations thereof. Agonistic behaviour patterns were described from field and laboratory observations. A scheme of interrelationships among action–reaction pairs was constructed from field data. This scheme permits one to predict the likelihood of the occurrence of possible reactions of a chipmunk to a given action performed by a conspecific.

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