Notes on the Collared Pika, Ochotona collaris (Nelson), in Alaska
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چکیده
منابع مشابه
Interannual Variation in Timing of Parturition and Growth of Collared Pikas (Ochotona collaris) in the Southwest Yukon.
The length of the snow-free season has a significant influence on reproduction and growth in northern alpine environments, and these life history traits may provide sensitive indicators of the responses of organisms to climate change. We examined growth rates and timing of parturition of collared pikas (Ochotona collaris) from 1995-2002 in the Ruby Range, Yukon Territory, Canada. Growth rates w...
متن کاملCharacterization of mitochondrial DNA from the pika (Ochotona rufescens rufescens).
Further to anatomical and physiological studies performed on the pika (Ochotona rufescens rufescens), a new laboratory animal, the main characteristics of the mitochondrial DNA from its liver are defined. The buoyant density of this DNA is 1.695 g/cm3, its length 5.30 mum,, i.e., 3.17 times that of the replicative form of phiX 174. It could have approximately 16 500 base pairs. The DNA from the...
متن کاملOchotona princeps (pika) myoglobin: an appraisal of lagomorph phylogeny.
Myoglobin was purified from skeletal muscle of the pika (Ochotona princeps) and its primary structure was determined. This sequence was added to the set of 64 already known vertebrate myoglobin sequences and used to evaluate the phylogenetic position of the pika among other mammals, using a computerized search procedure based on maximum parsimony criteria. The pika is clearly related to the rab...
متن کاملSpecies of coccidia (Apicomplexa: Eimeriidae) infecting pikas from Alaska, U.S.A. and northeastern Siberia, Russia.
Eighty-eight fecal samples from 2 species of pika, Ochotona collaris and Ochotona hyperborea, collected in Alaska (N = 53) and Russia (N = 35), respectively, were examined for the presence of coccidia (Apicomplexa: Eimeriidae). Five oocyst morphotypes were observed. In O. collaris, we found Eitmeria calentinei, Eimeria cryptobarretti, and Eimeria klondikensis, whereas in O. hyperborea, we found...
متن کاملMolecular Phylogenetics and Taxonomy of the Subgenus Pika (ochotona, Lagomorpha)
A phylogenetic analysis based on partial sequences of 2 mitochondrial genes (cytochrome b and cytochrome c oxidase subunit I) confirmed that Ochotona alpina (Pallas, 1773) and O. turuchanensis Naumov, 1934, are sister taxa to all other Palearctic species of the subgenus Pika. O. hyperborea (Pallas, 1811) contains sufficient genetic heterogeneity to define 2 or 3 races within this species. Exami...
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ژورنال
عنوان ژورنال: The Murrelet
سال: 1961
ISSN: 0027-3716
DOI: 10.2307/3533776