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.

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.

Social allies modulate corticosterone excretion and increase success in agonistic interactions in juvenile hand-raised graylag geese (Anser anser)

2003 ◽  
Vol 81 (10) ◽  
pp. 1746-1754 ◽  
Author(s):  
Didone Frigerio ◽  
Brigitte Weiss ◽  
John Dittami ◽  
Kurt Kotrschal
Keyword(s):  
Life History ◽  
Foster Parent ◽  
Social Partner ◽  
Agonistic Behaviour ◽  
Agonistic Interactions ◽  
Anser Anser ◽  
Access To Resources ◽  
Standard Distance ◽  
Social Alliances ◽  
Corticosterone Metabolites

In mammals, support by a social partner may reduce stress levels and ease access to resources. We investigated the effects of the passive presence of a nearby social ally on excreted corticosterone immunoreactive metabolites and behaviour in juvenile graylag geese (Anser anser). Two groups of hand-raised juveniles (N1 = 9, N2 = 3) were tested over 1 year by positioning humans of different familiarity (i.e., the human foster parent, a familiar human, a nonfamiliar human, no human) at a standard distance to the focal geese. Their success in agonistic interactions significantly decreased with age and with decreasing familiarity of the accompanying human. The humans present modulated the excretion of corticosterone immunoreactive metabolites, with the strongest effects recorded after fledging when corticosterone metabolites were also positively correlated with agonistic behaviour. This suggests that a human foster parent may provide similar supportive benefits as goose parents do in natural families. We discuss the benefits of social alliances with regard to the integration into the flock, access to resources, and life history.

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 in the male fiddler crab Uca leptodactyla Rathbun, 1898 at varying densities

Crustaceana ◽  
2015 ◽  
Vol 88 (6) ◽  
pp. 625-640 ◽  
Author(s):  
L. C. Santos ◽  
C. E. R. D. Alencar ◽  
F. A. M. Freire ◽  
A. C. Luchiari
Keyword(s):  
Population Density ◽  
Mangrove Forest ◽  
Fiddler Crab ◽  
High Density ◽  
Agonistic Behaviour ◽  
Agonistic Interactions ◽  
Energy Investment ◽  
Low Level ◽  
Crab Density ◽  
Interaction Intensity

In this study we tested the effect of population density on agonistic interactions in male Uca leptodactyla Rathbun, 1898. We recorded the crab’s behaviour in pairs or in groups of five animals composed of conspecifics and heterospecifics living in the same area (sympatric) and distinct areas (allopatric) of the mangrove forest. Allopatric conspecific crabs showed higher approaching and signalling than those in other conditions. The higher the crab density, the lower the interaction intensity between animals. Low-level agonistic signals were mainly displayed in high density (groups), while claw touch mainly occurred in pairs. Allopatric conspecifics showed the more intense agonistic interactions. Therefore, Uca seems to decrease energy investment in unnecessary fights against sympatric and conspecific crabs. Population density is a major factor driving agonistic behaviour mainly when conspecific animals are kept together. This may occur due to the increased competition for the same resources.

scholarly journals Movement Patterns of Eastern Chipmunks (Tamias striatus) Near Roads

2008 ◽  
Vol 89 (4) ◽  
pp. 895-903 ◽  
Author(s):  
Adam T. Ford ◽  
Lenore Fahrig
Keyword(s):  
Movement Patterns ◽  
Tamias Striatus ◽  
Eastern Chipmunks
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