![]() ![]() The species is well-studied in a very limited portion of its range, but baseline information on population trends at the range level, and a clear understanding of the extent and severity of climate impacts to this species and its habitat in the coming decades is limited. A demonstrated sensitivity to climate variability, coupled with poor dispersal ability and the naturally fragmented nature of its populations, heightens the vulnerability of this small mammal to climate change. This region comprises over half the global range of this species, and is witnessing climate-driven shifts in habitat, temperature, and precipitation at faster rates than elsewhere in Canada. This small rabbit-relative is a Beringian relict that is restricted to talus slopes in alpine areas in northern west British Columbia, Yukon, and Northwest Territories. © Her Majesty the Queen in Right of Canada, 2012. This report was overseen and edited by Justina Ray, Co-chair of the COSEWIC Terrestrial Mammals Specialist Subcommittee.Įmail: Également disponible en français sous le titre Évaluation et Rapport de situation du COSEPAC sur le Pica à collier ( Ochotona collaris) au Canada.Ĭover illustration/photo: Collared Pika - © John Nagy. Morrison for writing the status report on the Collared Pika Ochotona collaris in Canada, prepared under contract with Environment Canada. ![]() x + 50 pp.ĬOSEWIC would like to acknowledge David Hik, Jessie Zgurski, Kieran O’Donovan, and Shawn F. Committee on the Status of Endangered Wildlife in Canada. COSEWIC assessment and status report on the Collared Pika Ochotona collaris in Canada. This report may be cited as follows:ĬOSEWIC. Survival rates were calculated from a marked population of pikas live-trapped annuallyĬOSEWIC status reports are working documents used in assigning the status of wildlife species suspected of being at risk. Annual survival rates of adult females, adult males, and juvenile Collared Pikas, southwestern Yukon, 1995-2009. Data were summarized across all years of data (1995-2009), as well as 1998-2009 to standardize across changes in the size of the study area Population sizes include males and females, and the population growth rate ( λ t = N t+1/ N t) is the finite annual rate of increase in the number of pikas ( N) between year t and year t+1. Number of adult and juvenile pikas in late summer, and population growth rate, from 1995 to 2009 in the Ruby Ranges, southwestern Yukon. Potential habitat was defined as the area of alpine or rocky habitat These 23 EcoRegions contain 455,858 km² (94.5 %) of the total Yukon area of 482,443 km². ![]() Area (km²) of potential Collared Pika habitat within the EcoRegions and EcoZones of Yukon Territory ‘known or suspected’ to contain pikas (sensu Smith et al. Location data from these specimens and field observations were used to create Figure 3 Number of museum specimens and field observations of Collared Pikas per decade across its global range. (1990) and recent field observations (Figure 3) Estimates are based on the summary of Smith et al. Global and Canadian extent of occurrence for Collared Pikas. The solid line indicates the mean probability based on 2500 runs of the PVA model, and the dotted lines provide boot-strapped 95% confidence intervals Probability of quasi-extinction of a Collared Pika population in southwestern Yukon based on a count-based population viability analysis. An active Collared Pika haypile from southwestern Yukon. Typical Collared Pika habitat in the Ruby Ranges of southwestern Yukon that combines talus slopes for shelter and alpine meadows for forage. The global range of Collared Pikas (i.e., estimated extent of occurrence) and locations of specimen collections and field observations from Canada collaris has been modified for this Status Report (Figure 3) Current global distribution of Collared Pika ( O. Photograph of an adult Collared Pika in talus habitat located in southwestern Yukon, Canada (Photo (c) Kieran O'Donovan) Acknowledgements and Authorities Contacted.Canadian index of area of occupancy, IAO.Population spatial structure and variability.Wildlife Species Description and Significance.
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