Results 181 to 190 of about 8,963 (213)

Phylogeny of the bears (Ursidae) based on nuclear and mitochondrial genes

Molecular Phylogenetics and Evolution, 2004
The 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 ...
Li, Yu, Qing-wei, Li, O A, Ryder, Ya-ping, Zhang   +3 more
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Enamel Structure of Arctoid Carnivora: Amphicyonidae, Ursidae, Procyonidae, and Mustelidae [PDF]

Journal of Mammalogy, 2001
Enamel of several fossil and recent arctoid carnivores was studied with light and scanning electron microscopy. As in other carnivorans, 3 types of Hunter-Schreger bands (HSB) were observed: undulating, acute-angled, and zigzag HSB, which differ in their 3-dimensional complexity.
exaly   +2 more sources

A comparative chromosome banding analysis of the Ursidae and their relationship to other carnivores

Cytogenetics and Cell Genetics, 2008
Trypsin G-banded karyotypes of eight species of Ursidae were prepared from retrovirus-transformed skin fibroblast cultures. The banding patterns of all bears are highly conserved, even though their diploid numbers range from 42 to 72. A comprehensive analysis of the homologous banding patterns within the Ursidae and with a hypothesized ancestral ...
Nash, William G., O'Brien, Stephen J.
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Basic haematological values in carnivores—I. The canidae, the hyaenidae and the ursidae

Comparative Biochemistry and Physiology Part A: Physiology, 1987
Basic 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, Pospísil, F, Kase, J, Vahala
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Carnivora - Bears, family Ursidae

1962
Bulletin of the National Museum, Singapore, Issue 31, pp ...
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???????????????????????? ???????????? Ursidae ?? ?????????? ?????????????? ???????????????????????? ???????????????????????? ???? ???????? ?????????????????????????? ??????????????????????

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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Ophthalmology of Ursidae: Bears

2022
Claudia Hartley, Rui Pedro Rodrigues Oliveira   +1 more
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Feeding ecology and morphology of the upper canines in bears (carnivora: Ursidae)

Journal of Morphology, 2008
AbstractThe 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 ...
openaire   +2 more sources

Ursidae 熊科 @iN

2020
Kwok, Alan, Tai, Ada
openaire   +1 more source

Spatial Patterns of Genetic Diversity in Eight Bear (Ursidae) Species

Ursus, 2021
Emily E. Puckett, Isis S Davis
exaly