Plant—animal interactions and climate: Why do yellow pine chipmunks (Tamias amoenus) and eastern chipmunks (Tamias striatus) have such different effects on plants?

Ecoscience ◽  
2011 ◽  
Vol 18 (2) ◽  
pp. 130-137 ◽  
Author(s):  
Stephen B. Vander Wall ◽  
Stephen H. Jenkins
Keyword(s):  
Tamias Striatus ◽  
Tamias Amoenus ◽  
Yellow Pine ◽  
Eastern Chipmunks ◽  
Plant Animal Interactions

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

Recaching of Jeffrey pine (Pinus jeffreyi) seeds by yellow pine chipmunks (Tamias amoenus): potential effects on plant reproductive success

1998 ◽  
Vol 76 (1) ◽  
pp. 154-162 ◽  
Author(s):  
Stephen B.Vander Wall ◽  
Jamie W Joyner
Keyword(s):  
Reproductive Success ◽  
Sierra Nevada ◽  
Source Area ◽  
Pinus Jeffreyi ◽  
Nurse Plants ◽  
Plant Reproductive Success ◽  
Jeffrey Pine ◽  
Pine Seedlings ◽  
Tamias Amoenus ◽  
Yellow Pine

Animals that scatter-hoard seeds frequently dig up and recache them at new locations. The effect of the recaching of seeds on plant reproductive success was studied in the Sierra Nevada of western Nevada. The fate of 1000 individually marked Jeffrey pine (Pinus jeffreyi) seeds initially placed in 100 primary caches in a 10 x 10 array was monitored during autumn 1995 and spring 1996. Yellow pine chipmunks (Tamias amoenus) quickly removed nearly all of the seeds and recached many of them in 377 secondary caches containing 727 seeds. Later, rodents dug up most of these caches and transferred them to 213 tertiary caches (283 seeds), 75 quaternary caches (92 seeds), and 13 quintic (fifth order) caches (13 seeds). Overall, rodents ate 15.3% of the seeds they took from primary through quintic caches, and an additional 71.1% of the seeds disappeared, probably to underground runways and larders. During our spring survey of the study site, 133 seeds (13.6%) from 84 caches had germinated or were about to germinate. As rodents moved seeds from cache site to cache site, several changes occurred that potentially influenced the distribution and survival of Jeffrey pine seedlings. First, the number of seeds per cache decreased. Second, cached seeds were gradually moved farther from the source area. Third, the dispersal distance between successive cache sites decreased. Fourth, the distribution of cached seeds became more even. Lastly, more seeds were cached beneath shrubs, which serve as nurse plants for Jeffrey pine seedlings. Consequently, the movement of seeds between cache sites by chipmunks may increase the probability that Jeffrey pine seedlings will establish from rodent caches.

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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