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Amphibians and reptiles in the AOSERP study area

  • Author(s) / Creator(s)
  • During June, July, and August of 1976 three species of amphibians were found within the Alberta Oil Sands Project area. The wood frog (Rana sylvatica) was the most abundant and widespread species and was collected at each of 20 sites examined. Boreal chorus frogs (Pseudacris triseriata maculata) and Canadian toads (Bufohemiophrys) were common but found at less than half of the study sites. All three species had spawned prior to 12 June. Natural ponds and borrow pits were the most frequently used spawning sites. Canadian toads also spawned in flowing water and lake margins. All species had metamorphosed by early August. Wood frogs metamorphosed at a mean snout-vent length of 17.2 mm, Canadian toads at 12.4 mm, and boreal chorus frogs at 13.7 mm. Spawning for each of these species probably does not occur until individuals are in their third summer of life. Population densities of wood frogs, boreal chorus frogs, and Canadian toads reached estimated maxima of 19.6, 2.3, and 12 per 1000 m2 during 1977. Maximum densities of all species were found within 50 m of the nearest body of water in moist habitat vegetated by sedges, grasses, horsetails, willows and poplar. Lower densities were found in upland mixed woods and no anurans were found in dry areas with sandy substrate and jack pine forest. Other amphibian species and reptiles are either absent or only locally abundant.

  • Date created
    1979
  • Subjects / Keywords
  • Type of Item
    Report
  • DOI
    https://doi.org/10.7939/R3G16T
  • License
    This material is provided under educational reproduction permissions included in Alberta Environment and Sustainable Resource Development's Copyright and Disclosure Statement, see terms at http://www.environment.alberta.ca/copyright.html. This Statement requires the following identification: \"The source of the materials is Alberta Environment and Sustainable Resource Development http://www.environment.gov.ab.ca/. The use of these materials by the end user is done without any affiliation with or endorsement by the Government of Alberta. Reliance upon the end user's use of these materials is at the risk of the end user.