Ecology of the American dog tick, Dermacentor variabilis (Say), in Nova Scotia

1969 ◽  
Vol 47 (2) ◽  
pp. 171-181 ◽  
Author(s):  
Donald G. Dodds ◽  
Arthur M. Martell ◽  
Richard E. Yescott
Keyword(s):  
Nova Scotia ◽  
Deer Mouse ◽  
Black Bear ◽  
Dermacentor Variabilis ◽  
Meadow Vole ◽  
Mammal Species ◽  
Erethizon Dorsatum ◽  
American Dog Tick ◽  
Dog Tick ◽  
Small Mammal Species

The American dog tick has been extending its range in western Nova Scotia since about 1940. The presence of a number of suitable hosts, a temperate, moist climate, and logging operations producing an interspersion of choice vegetative conditions allow relatively high densities and a continuous spread. Seven small mammal species act as hosts. The most important hosts of immature stages are meadow vole (Microtus pennsylvanicus), deer mouse (Peromyscus maniculatus), southern bog lemming (Synaptomys cooperi), and meadow jumping mouse (Zapus hudsonius). Important hosts for adult stages are porcupine (Erethizon dorsatum), raccoon (Procyon lotor), and black bear (Ursus americanus).

Seasonal dynamics of American dog tick, Dermacentor variabilis (Say), populations in southwestern Nova Scotia

1978 ◽  
Vol 56 (1) ◽  
pp. 28-39 ◽  
Author(s):  
Maxwell B. Garvie ◽  
John A. Mckiel ◽  
Daniel E. Sonenshine ◽  
Alan Campbell
Keyword(s):  
Nova Scotia ◽  
Larval Density ◽  
Weather Conditions ◽  
Adult Tick ◽  
Dermacentor Variabilis ◽  
Life Cycles ◽  
Main Peak ◽  
American Dog Tick ◽  
Population Peak ◽  
Dog Tick

Seasonal activity and host relationships of the American dog tick in three areas of southwestern Nova Scotia are described from 1973 to 1975. The majority of Dermacentor variabilis individuals undergo a 2-year life cycle in Nova Scotia. Unfed adults and larvae are the two main overwintering stages. Adult tick activity extends from April to mid-August, with one population peak during May and (or) June. Peak adult densities, based on mark–recapture methods, were estimated between 7887 and 20 909 ticks per hectare at two areas during 1974 and 1975. Larval activity extending from late April to September was usually bimodal. The main peak of overwintered larvae engorged during June, while a second peak of recently hatched larvae, depending on weather conditions, usually occurred during August. The main relative larval density during the dominant spring peak was 3.95 larvae per host. Nymphal populations occurred between May and August with the unimodal activity pattern averaging 3.85 nymphs per host at the peak during June. The voles Microtus pennsylvanicus and Clethrionomys gapperi sustained almost 80% of all larvae and over 85% of all nymphs collected from mammal hosts. The snowshoe hare, Lepus americanus, and the jumping mouse, Zapus hudsonius, also harbored substantial numbers of immature ticks. Dermacentor variabilis life cycles studied in Massachusetts, Virginia, and Nova Scotia are compared.

Occurrence of the American Dog Tick, Dermacentor variabilis (Say) in Western Nova Scotia

1961 ◽  
Vol 93 (10) ◽  
pp. 891-893 ◽  
Author(s):  
R. R. Hall ◽  
J. A. McKiel
Keyword(s):  
United States ◽  
Nova Scotia ◽  
Dermacentor Variabilis ◽  
Coastal Plains ◽  
Eastern United States ◽  
Male And Female ◽  
American Dog Tick ◽  
Far North ◽  
Dog Tick

The American dog tick, Dermacentor variabilis (Say) is abundant in many localities throughout the coastal plains of eastern United States (Bequaert, 1946) and according to Lewis (1960) occurs in sparse numbers as far north as the Bangor area in Maine. In Canada, it is found from Saskatchewan to Nova Scotia (Gregson, 1956) but seemingly only in small numbers and in widely separated areas east of Manitoba. The published information on its occurrence in Nova Scotia is limited to a single record by Twinn (1944) who mentioned that male and female American dog ticks in “considerable numbers” were taken at the upper waters of the Sissiboo River in Digby County. Since its presence in western Nova Scotia in infestation numbers does not appear to be generally known outside that province, it is felt that a note on our observations on D. variabilis might be of interest.

Synganglion transcriptome and developmental global gene expression in adult females of the American dog tick, Dermacentor variabilis (Acari: Ixodidae)

2011 ◽  
Vol 20 (4) ◽  
pp. 465-491 ◽  
Author(s):  
B. W. Bissinger ◽  
K. V. Donohue ◽  
S. M. S. Khalil ◽  
C. M. Grozinger ◽  
D. E. Sonenshine ◽  
...  
Keyword(s):  
Gene Expression ◽  
Global Gene Expression ◽  
Dermacentor Variabilis ◽  
American Dog Tick ◽  
Adult Females ◽  
Dog Tick

Demographic responses of small mammal populations to a herbicide application in coastal coniferous forest: population density and resiliency

1990 ◽  
Vol 68 (5) ◽  
pp. 874-883 ◽  
Author(s):  
Thomas P. Sullivan
Keyword(s):  
Small Mammal ◽  
Average Duration ◽  
Deer Mouse ◽  
Coniferous Forest ◽  
Control Area ◽  
Deer Mice ◽  
Herbicide Application ◽  
Mammal Species ◽  
Small Mammal Species ◽  
Demographic Responses

This study was designed to assess the demographic responses of small mammal populations to herbicide-induced habitat alteration in a 7-year-old Douglas-fir plantation near Maple Ridge, British Columbia, Canada. Populations of the deer mouse (Peromyscus maniculatus), Oregon vole (Microtus oregoni), Townsend chipmunk (Eutamias townsendii), and shrews (Sorex spp.) were sampled in control and treatment habitats from April 1981 to September 1983 and from April to October 1985. Recolonization of removal areas by these species was also monitored in both habitats. There was little difference in abundance of deer mice, Oregon voles, and shrews between control and treatment study areas. Chipmunk populations appeared to decline temporarily on the treatment areas relative to controls. Recolonization by voles was not affected by habitat change, but for deer mice was lower on the treatment than control area. Both deer mouse and Oregon vole populations were at comparable densities on control and treatment areas in the second and fourth years after herbicide treatment. The proportion of breeding animals and average duration of life were similar in control and treatment populations of deer mice and voles. These small mammal species should be able to persist in areas of coastal coniferous forest that are treated with herbicide for conifer release.

Feeding and respiratory gas exchange in the American dog tick, Dermacentor variabilis

1999 ◽  
Vol 45 (4) ◽  
pp. 297-304 ◽  
Author(s):  
Laura J. Fielden ◽  
Robert M. Jones ◽  
Martin Goldberg ◽  
Yigal Rechav
Keyword(s):  
Gas Exchange ◽  
Dermacentor Variabilis ◽  
Respiratory Gas Exchange ◽  
American Dog Tick ◽  
Dog Tick
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