Results 101 to 110 of about 7,234 (207)

Ultrasonographic and Endoscopic Findings of Pancreatic Adenocarcinoma With Duodenal Invasion in a Brown Bear (Ursus arctos)

Veterinary Radiology &Ultrasound, Volume 67, Issue 4, July 2026.
ABSTRACT This report describes a 25‐year‐old, intact male brown bear (Ursus arctos) presenting with weight loss, diarrhea, melena, apathy, and a 12% hematocrit. Ultrasound showed proximal duodenal wall thickening with submucosal cysts and a large, heterogeneous, highly vascularized mass in the descending duodenum, containing small gas pockets and ...
Mariana Giendruczak de Souza, Arthur Carlos da Trindade Alves, Bernardo de Paula Miranda, Felipe Kataoka, Bruna Patrícia Siqueira Raimundo, Daniela Oliveira Rocha, Daniel Guimarães Ubiali, Gabriela Castro Lopes Evangelista, Marcus Antônio Rossi Feliciano   +8 more
wiley   +1 more source

The Relationships of Season, Climate, Habitat, and Sex Variables With Fecal Cortisol, Progesterone, and Testosterone Metabolite Concentrations in Roe Deer

Ecology and Evolution, Volume 16, Issue 6, June 2026.
Roe deer in Kiasar National Park and Wildlife Refuge, Iran; Photo by Hamed Tizrooyan. This study examined how seasonal, climatic, topographic, habitat, and sex variables influence fecal cortisol, testosterone, and progesterone metabolite concentrations in roe deer populations within Iran's Kiasar National Park and Wildlife Refuge through fecal sample ...
Seyed Mehdi Amininasab, Zarbakht Ansari Pirsaraei, Ahmad Yousefpour Bisheh   +2 more
wiley   +1 more source

Опыт применения различных средств для отпугивания бурых медведей (Ursus arctos) во время проведения полевых геофизических и геологических работ на п-ове Пьягина Магаданской области

Амурский зоологический журнал
В статье рассмотрен опыт использования различных средств, применяемых для отпугивания бурых медведей (Ursus arctos) от сотрудников геолого-геофизических отрядов, работающих в полевых условиях на п-ове Пьягина Ольского муниципального округа, в местности ...
Максим Бориславич Горшунов
doaj   +1 more source

The King in the Crosshairs: Evidence of a Predation Attempt on European Bison by Wolves

Ecology and Evolution, Volume 16, Issue 6, June 2026.
To our knowledge, we present the first video‐recorded evidence of wolves attacking a European bison herd in the BPF. The European bison, often referred to as the king of the forest, is generally described as a non‐prey species, but historical data and our recent documented observation provide clear evidence that they can be subjected to wolf predation.
Robin Rozemarijn Wijnands, Tomasz Borowik   +1 more
wiley   +1 more source

A late pleistocene brown bear (Ursus arctos) from Northwest Washington

, 2008
A late pleistocene brown bear (Ursus arctos) from Northwest ...
Mustoe, George, Carlstad, Cynthia
core  

Investigating the relationship between antipredator behavior and human disturbance using LiDAR imagery

Ecosphere, Volume 17, Issue 6, June 2026.
Abstract The human‐built environment influences the behavior and survival of many species, but most of these studies have been conducted in urban areas. Yet, anthropogenic development may impact species differently across scales, including at the rural level. We examined whether the built environment in a rural area obstructed visibility and influenced
Katie A. Adler, Daniel T. Blumstein
wiley   +1 more source

Evaluating commonly used tools to quantify human activity for protected area management

People and Nature, Volume 8, Issue 6, Page 1692-1704, June 2026.
Abstract Recreation in protected areas (PAs) is growing worldwide, potentially conflicting with wildlife and ecosystem protection. Efficiently estimating human activity in PAs is crucial for balancing a dual mandate of supporting visitor access and biodiversity, but managers lack clear recommendations about the conditions under which specific tools are
Alys Granados, Christopher Beirne, Sean Kearney, Catherine Sun, Courtney Hughes, Solène Marion, Annie Loosen, Anne Hubbs, Dan Farr, Mitchell Fennell, Michael Procko, Melanie Percy, John Paczkowski, Keegan Hoffman, Regan Kohlhardt, Jesse Whittington, Benjamin Curry, A. Cole Burton   +17 more
wiley   +1 more source

Juvenile predation overwhelms nutritional effects on female ungulate fat reserves in a high‐predation system

Functional Ecology, Volume 40, Issue 6, Page 1578-1586, June 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Ungulate body fat reserves reflect the nutritional environment, often serving as a useful indicator of bottom‐up resource availability. However, body fat reserves also integrate energetic costs associated with avoiding predation risk and reproductive effort, and it is ...
Nicole P. Bealer, Mark Hebblewhite, Sara H. Williams, Jodi E. Berg, Hans W. Martin, Evelyn H. Merrill   +5 more
wiley   +1 more source

Status and Numbers of the Brown Bear (Ursus arctos L.) in Bulgaria. [PDF]

Animals (Basel), 2023
Serbezov R, Spassov N.
europepmc   +1 more source

Ursus arctos subsp. stikeenensis Merriam 1914

, 2005
Ursus arctos subsp. stikeenensis Merriam 1914 Synonyms: Ursus arctos subsp. atnarko Merriam 1918; Ursus arctos subsp. chelan Merriam 1916; Ursus arctos subsp. chelidonias Merriam 1918; Ursus arctos subsp. crassodon Merriam 1918; Ursus arctos subsp. hoots Merriam 1916; Ursus arctos subsp. kwakiutl Merriam 1916; Ursus arctos subsp. pervagor Merriam 1914;
Wilson, Don E., Reeder, DeeAnn
openaire   +1 more source