Hosts & distribution of Rocky Mountain wood ticks (<i>Dermacentor andersoni</i>) at a tick focus in British Columbia rangeland

Authors

  • P. R. Wilkinson Research Station Agriculture Canada Lethbridge, AB

Keywords:

<i>Dermacentor andersoni</i>, Rocky Mountain wood tick, <i>Eutamias amoenus</i>, <i>Peromyscus maniculatus</i>, <i>Marmota flaviventris</i>, <i>Neotoma cinerea</i>, <i>Tamiasciurus hudsonicus</i>

Abstract

In a study of a Rocky Mountain wood tick (RMWT) population, <i>Eutamias amoenus</i> and <i>Peromyscus maniculatus</i> were the hosts most frequently trapped. Of these <i>E. amoenus</i> carried the greater number of immature RMWT. RMWT were also found in decreasing order of abundance on the following larger rodents: <i>Marmota flaviventris</i>, <i>Neotoma cinerea</i>, and <i>Tamiasciurus hudsonicus</i>. Of 3 areas sampled in and near the tick focus in 1967, most of the ticks were found on the uppermost steep and rocky, shrubby area, while the fewest were taken on a less steep grassy slope with few rocks. Sherman traps were the most efficient of 7 types tested in 1967 for capturing small mammals.

In both 1967 and 1968, larvae were most abundant on rodents in July, and scarce or absent from September to June. In 1968, trapping rodents from March to October revealed a major increase in nymph numbers in April and May, and a smaller rise in August and early September. In 1967, CO, as dry ice attracted only a few adult and nymphal ticks, when placed on and near the trap lines and rodent burrows. The number of unfed adult ticks/100 m<sup>2</sup>, recorded by flagging on and near the trap lines, declined each year in 1968 to 1970. In addition to RMWT, a few <i>Ixodes kingi</i> and <i>I. marmotae</i> were collected from mustelids and rodents.

References

Brown, E.B., W.R. Saatela, and W.D. Schmid. 1969. A compact lightweight live trap for small mammals. J. Mammal. 50:154-155.

Burt, W.H. 1940. Territorial behavior and populations of some small mammals in southern Michigan. Univ. of Michigan Zool. Misc. Publ. 45:1-158.

Chitty, D. and D.A. Kempson. 1949. Pre-baiting small mammals and a new design of live traps. Ecology 30:336-342.

Cowan, I.M. and C.J. Guiguet. 1965. The Mammals of British Columbia. British Columbia Prov. Museum, Victoria, B.C. Handbook No. 11.

Doss. M.A., M.M. Farr, K.F. Roach, and G. Anastos. 1974. Ticks and tickborne diseases. II. Host Index Catalogue of Medical and Veterinary Zoology. USDA, Washington.

Garcia, R. 1965. Collection of Dermacentor andersoni Stiles with carbon dioxide and its application in studies of Colorado tick fever virus. Amer. J. Trop. Med. Hyg. 14:1090-1093.

Gendron, J. and J. Bergeron. 1975. Comparaison de quatres methods statistiques pour estimer les niveaux de population du liévre d'Amerique, Lepus americanus. Can. J. Zool. 53:657-660.

Gregson, J.D. 1956. The Ixodoidea of Canada. Canada Department of Agriculture, Ottawa. Science Service Publication 930.

Gregson, J.D. 1966. Records of tick paralysis in livestock in British Columbia. Proc. Ent. Soc. British Columbia 63:13-18.

Gregson, J.D. 1971. Studies of two populations of Ixodes kingi Bishopp (Ixodidae). Can. J. Zool. 49:591-597.

Hafez, E.S.E. 1969. The behavior of domestic animals. Bailliere, Tindall and Cassell, London.

Harcourt, D.G. 1969. The development and use of life tables in the study of natural insect populations. Ann. Rev. Entomol. 14:175-196.

Maynard, R.J. 1968. The ecology of the Rocky Mountain wood tick in the Stump Lake area of British Columbia. B.Sc. Thesis. Dept. of Plant Sci., Univ. of British Columbia.

Mermod, C. 1969. Ecologie et dynamique des populations de trois rongeurs sylvicoles. Mammalia 33:1-57.

Montgomery, G.G. 1965. Rate of tick attachment to a white-failed fawn. Amer. Midl. Nat. 79:528-530.

Morris, R.D. 1968. A comparison of capture success between Sherman and Longworth live traps. Can. Fld. Nat. 82:84-87.

Mosby, H.S. (Ed.) 1963. Wildlife investigational techniques. The Wildlife Societv, Washington, D.C.

Nellis, C.H., C.J. Tory, and R.D. Taber. 1974. A conical pitfall trap for small mammals. Northwest Science 48:102.

Pelinenchenko, M.V. 1957. Ground beetles, destroyers of Ixodid ticks. Priroda 46:117.

Sheppe, W. 1967. The effect of live trappings on the movements of Peromyscus. Amer. Mid]. Nat. 78:470-479.

Sonenshine, D.E. 1972. Ecology of the American dog tick, Dermacentor variabilis, in a study area in Virginia. Ann. Entomol. Soc. Amer. 65:1164-1175.

Sonenshine, D.E., C.E. Yunker, C.M. Clifford, G.M. Clark, and J.A. Rudbach. 1976. Contributions to the ecology of Colorado tick fever virus. J. Med. Entomol. 12:651-656.

Southwood, T.R.E. 1966. Ecological methods. Methuen, London.

Trump, R.F. and G.O. Hendricksen. 1943. Methods for trapping and tagging woodchucks. J. Wildl. Memt. 7:420-421.

Wilkinson, P.R. 1967. The distribution of Dermacentor ticks in Canada in relation to bioclimatic zones. Can. J. Zool. 45:517-537.

Wilkinson, P.R. 1968. Phenology, behavior and host-relations of Dermacentor andersoni Stiles in outdoor ‘rodentaria’ and in nature. Can. J. Zool. 46:677-689.

Wilkinson, P.R. 1970a. A preliminary note on predation on free-living engorged female Rocky Mountain wood ticks. J. Med. Ent. 7:493-496.

Wilkinson, P.R. 1970b. Dermacentor ticks on wildlife and new records of paralysis. J. Entomol. Soc. B.C. 67:24-29.

Wilkinson, P.R. 1976. Effect of herbicidal killing of shrubs on abundance of Dermacentor andersoni Stiles (Acarina: Ixodidae) in British Columbia. J. Med. Ent. 13:713-718.

Wilkinson, P.R. 1979a. Ecological aspects of pest management of Ixodid ticks. Pp. 25-33. In: Advances in Acarology, Vol. 2. Academic Press. New York.

Wilkinson, P.R. 1979b. Early achievements, recent advances, and future prospects in the ecology of the Rocky Mountain wood tick. Pp. 105-112. In: Recent Advances in Acarology, Vol. 2. Academic Press, New York.

Wilkinson, P.R. 1981. The proportion of immature stages of the Rocky Mountain Wood Tick (Dermacentor andersoni) feeding on artificially infested cattle. J. Entomol. Soc. B.C. 78:38-42.

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Published

2019-09-17