Canadian Wildlife

Declines in Muskrat (Ondatra zibethicus) Population Density in Prince Edward Island, Canada

Posted on Oct 30, 2019

Author by Garry J. GREGORY, Randy DIBBLEE, Pierre-Yves DAOUST, and Michael R. VAN DEN HEUVEL CWBM 8 (2): 46–60 Correspondence: Mike van den Heuvel, Department of Biology, University of Prince Edward Island, 550 University Avenue, Charlottetown, Prince Edward Island, C0A 1C0, Canada. Email: mheuvel@upei.ca Abstract Muskrats (Ondatra zibethicus) are the most abundant furbearer on Prince Edward Island (PEI) and a cornerstone of the trapping industry in the province. In the past 10-20 yrs, trappers have reported declines in muskrat density in areas that have traditionally been much more...

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Is There A Mechanism That Causes Wolves from Same Area to Disperse Long-distances in Same Direction?

Posted on Oct 30, 2019

Author by Thomas D. GABLE, Austin T. HOMKES, Steve K. WINDELS, and Joseph K. BUMP CWBM 8 (2): 61–65 Correspondence: Thomas D. Gable, University of Minnesota, 2003 Upper Buford Circle, St. Paul, MN 55801, USA. Email: thomasd.gable@gmail.com Abstract In 2018, we documented 2 grey wolves (Canis lupus) from the Greater Voyageurs Ecosystem, Minnesota that dispersed >300 km north individually but exhibited strikingly similar dispersal patterns. These individuals eventually interacted with one another several months after dispersing. Though the probability of this occurring randomly appears...

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Control of Invasive Phragmites Increases Marsh Birds but not Frogs

Posted on Oct 30, 2019

Author by Douglas C. TOZER and Stuart A. MACKENZIE CWBM 8 (2): 66–82 Correspondence: Douglas C. Tozer, Long Point Waterfowl and Wetlands Research Program, Bird Studies Canada, P.O. Box 160 (Courier: 115 Front Road), Port Rowan, Ontario, N0E 1M0, Canada. Email: dtozer@birdscanada.org Abstract The non-native invasive form of common reed (Phragmites australis australis; hereafter “invasive Phragmites”) negatively affects certain flora and fauna throughout North America. As a result, much effort is spent in some locations controlling invasive Phragmites, although few estimates of the expected...

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New Alpha Wildlife Publication Upcoming CWBM Issue – Conservation and Management of Mesocarnivores

Posted on Oct 30, 2019

Author by Gilbert PROULX CWBM 8 (2): 2–8 4-News   View Full-Text    Download...

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Size and Seasonal Fluctuations of an Extra-limital Population of Black-tailed Prairie Dogs, Cynomys ludovicianus, in Central Alberta

Posted on May 31, 2019

Author by Gilbert PROULX CWBM 8 (1): 1–8 Abstract The black-tailed prairie dog (Cynomys ludovicianus) is a Threatened Species with a Canadian distribution limited to southwestern Saskatchewan, in and around Grasslands National Park. If populations were to be decimated or depleted, e.g., by drought or sylvatic plague, an extra-limital black-tailed prairie dog colony in central Alberta could be a source of animals for translocations. This study investigated the size and the fluctuations of this black-tailed prairie dog population from 2013 to 2017, with surveys conducted in early and late...

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Comparison of Beaver Density Estimates from Aerial Surveys of Waterways Versus Transects

Posted on May 31, 2019

Author by Shannon BARBER-MEYER CWBM 8 (1): 9–16 Correspondence: U. S. Geological Survey, 1393 Hwy 169, Ely, Minnesota, USA 55731. Email: sbarber-meyer@usgs.gov Abstract Historic beaver-sign (Castor canadensis) survey flights were often conducted over waterways to maximize beaver detections. However, densities determined from strip transect surveys are more useful to compare across and within study areas than waterway indices based on observations per distance flown because transects are more representative of the wider landscape. Yet, it is unknown if, and to what extent, aerial waterway...

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