Testosterone and persistent organic pollutants in East Greenland male polar bears (Ursus maritimus) [PDF]
Heliyon, 2023 Legacy persistent organic pollutants (POPs) such as polychlorinated biphenyls (PCBs) are chemicals that undergo long-range transport to the Arctic. These chemicals possess endocrine disruptive properties raising concerns for development and reproduction.
Tomasz M. Ciesielski +8 more
doaj +2 more sources
Microflora of the polar bear (Ursus maritimus) from natural population of the Russian Arctic [PDF]
E3S Web of Conferences, 2021 The paper presents the results of studying the microflora of the polar bear (Ursus maritimus) organism. Samples from 22 individuals were collected during three comprehensive scientific expeditions arranged in 2014 and 2015 at the request of PJSC Rosneft ...
Denisenko Tatyana +2 more
doaj +2 more sources
Case Studies in Polar Bear (Ursus maritimus) Sperm Collection and Cryopreservation Techniques [PDF]
Animals, 2022 Assisted reproductive technologies can aid conservation efforts via support of ex situ population management and preservation of genetic material. Data from 38 sperm collection attempts from 17 polar bears (1–5 procedures/bear) were evaluated.
Jessye Wojtusik +2 more
doaj +2 more sources
An Evolutionarily Young Polar Bear (Ursus maritimus) Endogenous Retrovirus Identified from Next Generation Sequence Data [PDF]
Viruses, 2015 Transcriptome analysis of polar bear (Ursus maritimus) tissues identified sequences with similarity to Porcine Endogenous Retroviruses (PERV). Based on these sequences, four proviral copies and 15 solo long terminal repeats (LTRs) of a newly described ...
Kyriakos Tsangaras +3 more
doaj +2 more sources
Crescentic glomerulonephritis in a polar bear (Ursus maritimus). [PDF]
J Vet Med Sci, 2013 Spontaneous crescentic glomerulonephritis (CrGN) in animals has only been reported in dog and sheep. We report the pathological features of CrGN in a 17-year-old male polar bear that died due to renal failure. Histologically, the lesions were characterized by fibrocellular crescents, adhesion between Bowman's capsule and the glomerular capillary tuft ...
Baba H +5 more
europepmc +3 more sources
High contributions of sea ice derived carbon in polar bear (Ursus maritimus) tissue. [PDF]
PLoS ONE, 2018 Polar bears (Ursus maritimus) rely upon Arctic sea ice as a physical habitat. Consequently, conservation assessments of polar bears identify the ongoing reduction in sea ice to represent a significant threat to their survival.
Thomas A Brown +5 more
doaj +2 more sources
Estimating Polar Bear (Ursus maritimus) Age Based on an Epigenetic DNA Methylation Clock [PDF]
Ecology and EvolutionKnowledge of animal age is essential to wildlife managers for obtaining meaningful and accurate insights into demographic parameters. A common approach to aging wildlife, including bears (Ursus spp.), has been extracting a tooth during physical capture ...
Susannah P. Woodruff +4 more
doaj +2 more sources
An on-ice aerial survey of the Kane Basin polar bear (Ursus maritimus) subpopulation. [PDF]
Polar Biol, 2022 Wiig Ø +8 more
europepmc +3 more sources
Environment International, 2013 Brominated flame retardants were determined in adipose tissues from 294 polar bears (Ursus maritimus) sampled in East Greenland in 23 of the 28 years between 1983 and 2010.
Rune Dietz +8 more
doaj +2 more sources
An assessment of microplastics in fecal samples from polar bears (Ursus maritimus) in Canada's North [PDF]
Arctic ScienceWe assessed the potential for plastic ingestion in polar bears (Ursus maritimus (Phipps (1774))) using fecal analysis. Two method studies ensured our protocols could effectively recover and identify plastics in feces. First, microplastics (film, foam, or
P.U. Iyare +10 more
doaj +2 more sources