The Canadian Field-Naturalist (E-Journal)
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"The Green Menace: Emerald Ash Borer and the Invasive Species Problem" by Jordan D. Marché II, 2017. [book review]
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Occurrence of the rare marine littoral millipede, Thalassisobates littoralis (Diplopoda: Nematosomatidae), in Canada
Get PDFThe first Canadian occurrence of the rare, marine littoral millipede, Thalassisobates littoralis, is reported from Campobello Island in the outer Bay of Fundy, New Brunswick. One of only a few North American occurrences, this is the most northerly to date from the continent
"Spineless: The Science of Jellyfish and the Art of Growing a Backbone" by Juli Berwald, 2018. [book review]
No full text"The Great Himalayan National Park: The Struggle to Save the Western Himalayas" by Sanjeeva Pandey and Anthony J. Gaston, 2019. [book review]
Get PDFSpring Peeper (Pseudacris crucifer) in Labrador, Canada: an update
Get PDFSpring Peeper (Pseudacris crucifer) was first confirmed in Labrador in 1998, when vocalizations were recorded near Happy Valley-Goose Bay. Prior to this, only unsubstantiated reports of Spring Peepers in Labrador existed. In 2006, we visually documented nine Spring Peepers at six locations west of Happy Valley-Goose Bay, in the lower Churchill River valley. In 2014, using auditory surveys, we further documented 1–10 Spring Peepers calling at 13 additional locations in the same general area. These new records support earlier findings and provide additional information on the species at the extreme northeastern edge of its range
Gray Wolf (Canis lupus) recolonization failure: a Minnesota case study
Get PDFDuring the past few decades, Gray Wolves (Canis lupus) have recolonized many areas in the United States and Europe. In many other cases, however, although dispersing wolves reached areas with adequate prey, a population failed to recolonize. Herein, we provide a case study detailing how a wolf pack attempted for three years to recolonize an area 55 km from a long-established population and within 25 km of Minneapolis and St. Paul, Minnesota, but failed. The pack produced three litters of pups and at one time included 11–19 members, but it preyed on livestock and dogs and, consequently, was lethally removed. The history of this pack’s attempt to recolonize an area long devoid of wolves exemplifies the issues that have prevented earlier recolonizations in non-wild lands in Minnesota and elsewhere and that promise to do so well into the future
Characteristics of Wolverine (Gulo gulo) dens in the lowland boreal forest of north-central Alberta
Get PDFWe investigated Wolverine (Gulo gulo) denning ecology in the boreal forest of northern Alberta. During winters 2015/2016 and 2016/2017, we used live traps to capture four female Wolverines and fitted them with global positioning system (GPS) collars programmed to take a location every two hours. We determined reproductive status at capture and GPS location data were used to identify den sites. One female denned in one of the two years, one female denned in two consecutive years, and two females did not den during the study. Seven of the eight Wolverine den sites were in mature or old Black Spruce (Picea mariana) stands, where dens consisted of a hollow, moss-covered mound originating from a partially uplifted root mass caused by a leaning or fallen tree. One den was located under decayed logging debris with an overstorey dominated by dense deciduous regeneration. Maximum snow depth recorded (December–March) at weather stations in the study area was 32–51 cm. Spring snow coverage was scarce in our study area (<1%) and always associated with ice cover on lakes and large ponds; mean distance from dens to nearest spring snow coverage was 15.19 km (SD = 2.73, n = 8). Female Wolverines appear to be using locally-available denning structures in the lowland boreal forest, despite a lack of deep snow, persistent spring snow cover, or large boulders documented in other studies.