Results 21 to 30 of about 15,567 (163)
Ecology and Evolution, 2023 Anthropogenic stressors are exacerbating the emergence and spread of pathogens worldwide. In regions like the Arctic, where ecosystems are particularly susceptible, marked changes are predicted in regional diversity, intensity, and patterns of infectious
Christina M. Tschritter +5 more
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Forros, Revista Mexicana de Ciencias Geológicas, vol. 40, núm. 2, agosto 2023
Revista Mexicana de Ciencias Geológicas, 2023 Imagen de la portada: Comparación del extremo distal del húmero de dos osos: un Agriotherium fósil y un Ursus Maritimus reciente. A la izquierda, Agriotherium (MPGJ 5676) de la cuenca de Juchipila, Zacatecas, México, edad Henfiliano temprano-tardío ...
Revista Mexicana de Ciencias geológicas
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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
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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
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Polar bear attack on a juvenile narwhal
Fauna Norvegica, 1990 A juvenile female narwhal Monodon monoceros landed at Pond Inlet had several sets of scratches on the posterior part of the body. They were probably made by a polar bear Ursus maritimus in the course of an unsuccessful attack.
Michael C.S. Kingsley
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Ursids evolved early and continuously to be low-protein macronutrient omnivores
Scientific Reports, 2022 The eight species of bears world-wide consume a wide variety of diets. Some are specialists with extensive anatomical and physiological adaptations necessary to exploit specific foods or environments [e.g., polar bears (Ursus maritimus), giant pandas ...
Charles T. Robbins +7 more
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Bear presence attracts avian predators but does not impact lesser snow goose daily nest attendance
Journal of Avian Biology, 2022 The presence of foraging bears in Arctic breeding bird colonies has been increasingly reported in the literature, and these may constitute disturbance events which cause incubating birds to leave their nest.
Andrew F. Barnas +6 more
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Polar bear (Ursus maritimus) use of the Cape Bathurst polynya and flaw lead
Arctic Science, 2022 The Cape Bathurst polynya and flaw lead (CBP) are major, predictable habitat features with ≤15% ice cover in an otherwise ice-covered Beaufort Sea, and thought to provide hunting opportunities for polar bears (Ursus maritimus Phipps, 1774).
Erin M. Henderson, Andrew E. Derocher
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Arctic Science, 2023 As sea-ice cover is shrinking, polar bears (Ursus maritimus, Phipps, 1774) face decreased access to seals, their primary prey, resulting in a greater dependence on terrestrial food sources.
Matthieu Weiss-Blais +8 more
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Novel range overlap of three ursids in the Canadian subarctic
Arctic Science, 2019 We describe for the first time in the peer-reviewed literature observations of American black bear (Ursus americanus Pallas, 1780), grizzly bear (Ursus arctos Linnaeus, 1758), and polar bear (Ursus maritimus Phipps, 1774) at the same locations.
Douglas Andrew Clark +5 more
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