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Phylogeny of the bears (Ursidae) based on nuclear and mitochondrial genes
Molecular Phylogenetics and Evolution, 2004The taxomic classification and phylogenetic relationships within the bear family remain argumentative subjects in recent years. Prior investigation has been concentrated on the application of different mitochondrial (mt) sequence data, herein we employ two nuclear single-copy gene segments, the partial exon 1 from gene encoding interphotoreceptor ...
Oliver A. Ryder +6 more
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Spatial patterns of genetic diversity in eight bear (Ursidae) species
Ursus, 2021Many of the 8 extant bear species have large ranges, yet range-wide studies of genetic diversity are often impractical because of logistic challenges or focus on local questions. However, understanding the levels of diversity among populations of a species can be useful for conservation and management.
Isis S. Davis, Emily E. Puckett
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Ecomorphological indicators of feeding behaviour in the bears (Carnivora: Ursidae)
Journal of Zoology, 2004AbstractPatterns of morphological variation in the skulls of extant bears were studied as they relate to diet and feeding behaviour. Measurements of craniodental features were used to compute indices that reflect dietary adaptations of the dentition and biomechanical properties of the skull, jaw and related musculature.
Blaire Van Valkenburgh, Tyson Sacco
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Combined analysis of fourteen nuclear genes refines the Ursidae phylogeny
Molecular Phylogenetics and Evolution, 2008Despite numerous studies, questions remain about the evolutionary history of Ursidae and additional independent genetic markers were needed to elucidate these ambiguities. For this purpose, we sequenced ten nuclear genes for all the eight extant bear species.
Catherine Hänni +5 more
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Basic haematological values in carnivores—I. The canidae, the hyaenidae and the ursidae
Comparative Biochemistry and Physiology Part A: Physiology, 1987Basic haematological values for 32 animals of four carnivore species are reported. In six adult wolves (Canis lupus) the mean values estimated for the erythrocyte count 7.48 X 10(12)/l, haematocrit 0.465/l, haemoglobin 172.0 g/l and leukocyte counts 7.33 X 10(9)/l are given.
J. Váhala, F. Kaše, J. Pospíšil
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Morphometry of upper cheek teeth of cave bears (Carnivora, Ursidae)
Boreas, 2018Univariate and multivariate statistics were applied to analyse the morphometrical variability of 4920 upper cheek teeth (P4, M1 and M2) of cave bears from 123 geographical sites (180 samples) of different Pliocene – Pleistocene ages. The analysed specimens included those belonging to the big cave bearsUrsus kudarensis,U. deningeri,U.
Gennady F. Baryshnikov +1 more
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Phylogeography of Brown Bears (Ursus arctos) of Alaska and Paraphyly within the Ursidae
Molecular Phylogenetics and Evolution, 1996Complete nucleotide sequences of the mitochondrial cytochrome b, tRNA(prolime), and tRNA(threonine) genes were described for 166 brown bears (Ursus arctos) from 10 geographic regions of Alaska to describe natural genetic variation, construct a molecular phylogeny, and evaluate classical taxonomies.
Gerald F. Shields, Sandra L. Talbot
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Feeding ecology and morphology of the upper canines in bears (carnivora: Ursidae)
Journal of Morphology, 2008AbstractThe morphology and mechanical strength of the upper canines in all eight extant species of ursids is analyzed, and the findings are discussed in relation to feeding ecology. Ursids have proportionally smaller canines than other large carnivores with a specialized feeding ecology, such as large felids, and the upper canine morphology is both ...
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Phylogenetic Relationships of Bears (the Ursidae) Inferred from Mitochondrial DNA Sequences
Molecular Phylogenetics and Evolution, 1994The phylogenetic relationships among some bear species are still open questions. We present here mitochondrial DNA sequences of D-loop region, cytochrome b, 12S rRNA, tRNA(Pro), and tRNA(Thr) genes from all bear species and the giant panda. A series of evolutionary trees with concordant topology has been derived based on the combined data set of all of
Oliver A. Ryder, Ya-Ping Zhang
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2020
The exhibition and scientific collection of the Museum of Nature currently deposit 16 specimens of the family Ursidae (bears), which belong to three species and 6 subspecies. A, 4 specimens (two species with three subspecies) originate from animals collected in the nature.
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The exhibition and scientific collection of the Museum of Nature currently deposit 16 specimens of the family Ursidae (bears), which belong to three species and 6 subspecies. A, 4 specimens (two species with three subspecies) originate from animals collected in the nature.
openaire +1 more source