High densities of the masked shrew, Sorex cinereus, in jack pine plantations in northern Ontario.

  title={High densities of the masked shrew, Sorex cinereus, in jack pine plantations in northern Ontario.},
  author={Duncan G. L. Innes and F. Bendell.J. and Brain J. Naylor and B. A. Smith},
  journal={American Midland Naturalist},
-The masked shrew Sorex cinereus was abundant in jack pine (Pinus banksiana) plantations in northern Ontario in a year which coincided with high numbers of jack pine budworm (Choristoneura pinus). Snap-trapping indicated that greater numbers of this shrew occurred in medium-age (40 yr) stands than very young (2-10 yr) stands. Continuous pitfalltrapping yielded many more S. cinereus than snap-trapping and also showed that shrew densities were greater in medium-age stands than in young (20 yr… 
Population dynamics and foraging of Sorex cinereus (masked shrew) in the boreal forest of eastern Canada
The abundance, reproduction, population structure, and diet of Sorex cinereus (Masked shrew) were analyzed in jack pine plantations in the southern boreal forest of eastern Canada over two years.
Diet of Sorex cinereus, the masked shrew, in relation to the abundance of Lepidoptera larvae in northern Ontario
Sorex cinereus showed a functional response to changes in the abundance of Lepidoptera larvae, which may explain the high abundance, large litter size and juvenile recruitment of shrews reported previously for the same plantation during 1985.
A review of factors affecting the population dynamics of jack pine budworm (Choristoneura pinus pinus Freeman)
The reciprocal interaction between heavy defoliation and low pollen cone production, and increased parasitism of late-stage larvae or pupae, are consistent with second-order density dependence factors identified in analysis of a long-term population data set.
Relative use of xeric boreal habitats by shrews (Sorex spp.)
A first approximation of the relative use of common forest types and subalpine shrub habitat in the boreal forest of northwestern Canada is provided.
Comparison of Small Mammal Abundance and Distribution in a Transitional Oak Stand, Jack Pine Barren, and Northern Hardwood For
Small mammal abundance and distribution were compared in a transitional oak stand, Jack pine barren, and Northern hardwood forest stand. Twenty-five Sherman live traps were set in each, the Northern
Managing for Habitat Heterogeneity in Grassland Agro-Ecosystems Influences the Abundance of Masked Shrews (Sorex cinereus)
It is suggested that old-fields are an important habitat to include in agro-ecosystems that should benefit both wildlife and agricultural producers.
Abundance and Species Richness of Shrews within Forested Habitats on Prince Edward Island
It is concluded that both B. brevicauda and S. cinereus are common and widespread-distributed on Prince Edward Island, and that S. hoyi is extremely rare on the Island and that it is possible that the species is extirpated from PrinceEdward Island.
Small mammals as bioindicators of sustainable boreal forest management


Peak Populations of the Masked Shrew in Northern Ontario
  • A. Vos
  • Environmental Science
  • 1957
It appears useful to record the presence of a widespread population peak of the masked shrew ( Sorex cinereus Kerr) starting in the late summer of 1955, and possibly continuing into early 1956, for
Factors Influencing the Local Distribution of Shrews
The present paper contains data pertaining to the masked shrew, Sorex cinereus, and the shorttailed shrew, Blarina brevicauda, during a study of the factors influencing the local distribution of small mammals in southern Michigan.
Ecological distribution of six species of shrews and comparison of sampling methods in the central Rocky Mountains.
  • L. N. Brown
  • Environmental Science
    Journal of mammalogy
  • 1967
A comparison of snap traps and sunken cans as methods of collecting shrews revealed that snap traps failed to demonstrate the presence of Sorex nanus and Microsorex hoyi in areas where they were abundant.
Responses of Small Mammals to the Clearcutting of Northern Appalachian Forests
Snap-trap sampling of small mammals in mature forests and on clearcuts of varying known ages revealed that clearcutting is followed by increases in small mammal abundance and diversity that persist until succession returns the area to forest.
Littoral feeding in a high-density insular population of Sorex cinereus
In a high-density insular population of masked shrews (Sorex cinereus), Diptera, amphipods, Araneae, and Coleoptera dominated the diet. The prominence of littoral amphipods and kelp flies in the diet
Habitat, Abundance, and Distribution of Six Species of Shrews in Manitoba
The most productive habitats for shrews were grass-sedge marsh and willow-alder fen, the only two in which all six species were found, and types of vegetation and cover influenced the distribution and abundance of shrews through the maintenance of high moisture levels and the provision of food supplies.
Dynamics of Habitat use by Small Mammals in Prairie Communities
Small mammal abundance was measured in a variety of habitats ranging from dry, sloping grasslands to moist, low-lying shrubland at Pipestone National Monument, Minnesota. These data were used to
A field study of growth and development of nestling masked shrews (Sorex cinereus).
  • D. Forsyth
  • Environmental Science
    Journal of mammalogy
  • 1976
Information on growth and development of Sorex cinereus from birth to 20 days was obtained from 60 nestlings from nine litters and excess weight gain in the nest may have survival value for the young while they learn to hunt.
Systematic Relationships of Woodland and Prairie Forms of the Common Shrew, Sorex cinereus cinereus Kerr and S. c. haydeni Baird, in the Canadian Prairie Provinces
Samples of Sorex cinereas cinereus Kerr and S. c. haydeni Baird from Alberta, Saskatchewan, and Manitoba were compared. Qualitative characters and the results of univariate and multivariate
A Comparison of North American Small-Mammal Censuses
Elton, 1932, breaks down population densities of Class I into (1) "economic densities," and (2) "highest densities." By "economic density" he refers to concentrations of animals on areas embraced by their home ranges or home territories and excluding "blanks" or unused areas.