Functional macronutritional generalism in a large omnivore, the brown bear
نویسندگان
چکیده
منابع مشابه
Functional macronutritional generalism in a large omnivore, the brown bear
We combine a recently developed framework for describing dietary generalism with compositional data analysis to examine patterns of omnivory in a large widely distributed mammal. Using the brown bear (Ursus arctos) as a model species, we collected and analyzed data from the literature to estimate the proportions of macronutrients (protein, carbohydrate, and lipid) in the diets of bear populatio...
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Nutrient balance is a strong determinant of animal fitness and demography. It is therefore important to understand how the compositions of available foods relate to required balance of nutrients and habitat suitability for animals in the wild. These relationships are, however, complex, particularly for omnivores that often need to compose balanced diets by combining their intake from diverse nu...
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The population size of the Pyrenean brown bear (Ursus arctos L.) has declined from about 200 animals to 20 or even less during the past 40 years. Distribution covered the Pyrenean slopes from the Atlantic to the Mediterranean Sea but is now restricted to an area of about 800 km2 in the western French Pyrenees. This area includes a national park, which, however, covers only a small portion of th...
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Humeral chondrosarcoma was found in an 18-year-old male Hokkaido brown bear (Ursus arctos yesoensis). Necropsy revealed a large firm mass under the left superficial pectoral muscle at the axillary region. The mass involved the left shoulder joint and peripheral muscles, and connected to the head of the humerus with osteolysis. Histopathologically, the mass was composed of irregularly shaped myx...
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ژورنال
عنوان ژورنال: Ecology and Evolution
سال: 2018
ISSN: 2045-7758,2045-7758
DOI: 10.1002/ece3.3867