Deep barriers, shallow divergences: reduced phylogeographical structure in the collared pika (Mammalia: Lagomorpha: Ochotona collaris )

2012 ◽  
Vol 40 (3) ◽  
pp. 466-478 ◽  
Author(s):  
Hayley C. Lanier ◽  
Link E. Olson
Keyword(s):  
Ochotona Collaris

Rapid assessment of site occupancy by collared pika (Ochotona collaris) at the leading edge of their range

2020 ◽  
Vol 66 (4) ◽  
Author(s):  
Piia M. Kukka ◽  
Julie P. Thomas ◽  
Justine E. Benjamin ◽  
Thomas S. Jung
Keyword(s):  
Rapid Assessment ◽  
Site Occupancy ◽  
Leading Edge ◽  
Ochotona Collaris

Polygynandry and even-sexed dispersal in a population of collared pikas, Ochotona collaris

2012 ◽  
Vol 83 (4) ◽  
pp. 1075-1082 ◽  
Author(s):  
Jessie M. Zgurski ◽  
David S. Hik
Keyword(s):  
Ochotona Collaris

scholarly journals Effects of Leaf Size on Forage Selection by Collared Pikas, Ochotona Collaris

2008 ◽  
Vol 40 (3) ◽  
pp. 481-486 ◽  
Author(s):  
James M. G. Hudson ◽  
Shawn F. Morrison ◽  
David S. Hik
Keyword(s):  
Leaf Size ◽  
Ochotona Collaris

Ochotona collaris

1987 ◽  
pp. 1 ◽  
Author(s):  
Stephen O. MacDonald ◽  
Clyde Jones
Keyword(s):  
Ochotona Collaris

scholarly journals A reconnaissance survey for Collared Pika (Ochotona collaris) in northern Yukon

2019 ◽  
Vol 133 (2) ◽  
pp. 130 ◽  
Author(s):  
Sydney G. Cannings ◽  
Thomas S. Jung ◽  
Jeffrey H. Skevington ◽  
Isabelle Duclos ◽  
Saleem Dar
Keyword(s):  
Habitat Suitability ◽  
New Records ◽  
Species Distribution Modelling ◽  
Aerial Survey ◽  
Suitable Habitat ◽  
Distribution Modelling ◽  
Reconnaissance Survey ◽  
Ochotona Collaris ◽  
Northern Portion ◽  
Richardson Mountains

Collared Pika (Ochotona collaris) is a cold-adapted Beringian species that occurs on talus slopes and is sensitive to climate warming. Collared Pikas are patchily distributed throughout the sub-Arctic mountains of northwestern Canada and Alaska; however, information on their occurrence in the northern part of their distributional range is limited. In particular, no survey information is known from the southern Richardson Mountains and the Nahoni Mountains. We conducted aerial- and ground-based surveys to document Collared Pika occurrence and general habitat suitability in northern Yukon. We flew 505 km of aerial survey (not including ferrying to targetted survey areas) and performed ground surveys at 22 sites within the Richardson Mountains (including a portion of Dàadzàii Vàn Territorial Park) and the Nahoni Mountains in and adjacent to Ni’iinlii Njik (Fishing Branch) Territorial Park. Overall, suitable habitat for Collared Pikas was patchy in the mountains of northern Yukon—talus was sparse and many patches of talus appeared to be unsuitable. Collared Pikas were detected at eight of 22 (36%) sites visited, representing important new records for the species in the northern portion of their range. Our reconnaissance provides a first approximation of habitat suitability for Collared Pikas of the mountains of northern Yukon, as well as new records for the species in the region. These data are useful in better determining the contemporary distribution of Collared Pika through species distribution modelling, and may serve to identify areas for more detailed survey and monitoring initiatives for this climate-sensitive mammal.

Discrimination of intra- and inter-specific forage quality by collared pikas (Ochotona collaris)

2008 ◽  
Vol 86 (6) ◽  
pp. 456-461 ◽  
Author(s):  
S. F. Morrison ◽  
D. S. Hik
Keyword(s):  
Water Content ◽  
Block Design ◽  
Ochotona Collaris ◽  
Randomized Block Design ◽  
Selection Decisions ◽  
Nutritional Characteristics ◽  
Forage Species ◽  
Specific Variation ◽  
Species Specific ◽  
Selection Of

The specific nutritional characteristics by which herbivores evaluate their foraging options are complex. We experimentally manipulated the crude protein and water content of two forage species ( Carex consimilis Holm. (= Carex bigelowii Torr. ex Schwein.) and Polygonum bistorta L.) commonly cached by collared pikas ( Ochotona collaris (Nelson, 1893)) to determine their influence on inter- and intra-specific forage selection. Preference data were collected for 27 pikas using cafeteria-style feeding trials in a randomized block design. A three-way interaction (species × protein × water) suggested that pikas made conditional forage selection decisions while caching these plants. The interaction was driven by greater selection for fresh rather than dried C. consimilis when both were not fertilized. Water content had no effect on the selection of either fertilized C. consimilis or fertilized P. bistorta. Overall, our results indicate that pikas made subtle decisions about their selection of vegetation during caching, based on variation in nitrogen and water content in addition to species-specific selection criteria. Further, our results imply that tests of foraging theory may need to consider intra-specific variation in forage characteristics, as well as inter-specific ranking of forage species.

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