Results 61 to 70 of about 7,621 (257)
Demographic buffering in natural populations: A multi‐level perspective
Journal of Animal Ecology, EarlyView.We introduce a multi‐level framework that unites stochastic elasticities with nonlinear selection to test demographic buffering. Applying it across mammals reveals a key insight: ecological robustness to variability often decouples from evolutionary constraint, reshaping how we understand resilience under environmental stochasticity.
Gabriel Silva Santos +4 more
wiley +1 more source
PLoS ONE, 2013 Dramatic environmental changes associated with global cooling since the late Miocene, and the onset of glacial-interglacial cycles in the Pleistocene served as a backdrop to the evolutionary radiation of modern bears (family Ursidae). These environmental
Shelly L Donohue +3 more
doaj +1 more source
Exploring dietary adaptations in Ursus minimus: a 3D geometric morphometric analysis of the mandible
Boreas, EarlyView.Using 3D geometric morphometrics, the dietary adaptations of the extinct Auvergne bear (Ursus minimus) are analysed. Its mandibular morphology aligns more closely with omnivorous rather than insectivorous bears, challenging current ideas. The extinct bear Ursus minimus, which lived in Europe during the Pliocene and possibly Early Pleistocene, is ...
Anneke H. van Heteren
wiley +1 more source
Judicial Oversight in the Comparative Context: Biodiversity Protection in the United States, Australia, and Canada [PDF]
, 2013 How effective are courts as policymaking institutions? Generally speaking, courts play a far larger role in American biodiversity law than they do in comparable Australian and Canadian statutory programs.
Robert, Shaffer
core +1 more source
Sex-selective harvesting of polar bears Ursus maritimus
Wildlife Biology, 2008 Abstract We explored limits and consequences of male-biased harvesting of polar bears Ursus maritimus using a simulated population based on empirically-derived estimates of age-specific rates of survival and reproduction. The maximum sustainable yield (MSY) was identified as the total kill in which the number of females that could be taken resulted in ≤
Mitchell K. Taylor +2 more
openaire +1 more source
Boreas, EarlyView.Bears deviate from the inhibitory cascade model (ICM) during molar size evolution, with two significant deviations linked to changes in diet: Ursus minimus and Ursus deningeri. Many bears exhibit a ‘partial ICM’, highlighting the relationship between relative molar size, dietary adaptations and dental development across different species.
Anneke H. van Heteren, A. Stefanie Luft
wiley +1 more source
Stereotypic route tracing in captive Carnivora is predicted by species-typical home range sizes and hunting styles [PDF]
, 2016 In captive conditions (e.g. zoos), some Carnivora species typically show negligible stereotypic behaviour (SB) and reproduce successfully, while others tend to reproduce poorly and be very stereotypic.
Clubb, Ros +5 more
core +2 more sources
Ecology and Evolution, Volume 16, Issue 4, April 2026.We introduce ENHYDROSS, a new mechanistic model that uses optimal swimming speed and minimum cost of transport to estimate maximum dispersal distances and durations for vertebrates, enabling assessment of long‐distance oceanic dispersal potential. Applied to a range of extant and extinct animals, the model's estimates generally align with observed data;
Alexandros Pantelides +5 more
wiley +1 more source
The European descendants of Ursus etruscus C. Cuvier (Mammalia, Carnivora, Ursidae). [PDF]
, 1992 En este trabajo se revisan el origen, evolucion y distribucion estratigrafica de los osos del Pleistoceno. IS. ruscinensis DEP. puede considerarse como e! ancestro comun: de el derivaria un grupo muy conservador (U. mediterraneus F.
Torres Pérez-Hidalgo, Trinidad José
core +1 more source
Work minimization accounts for footfall phasing in slow quadrupedal gaits [PDF]
, 2017 Quadrupeds, like most bipeds, tend to walk with an even left/right footfall timing. However, the phasing between hind and forelimbs shows considerable variation.
Self Davies, Z T, Usherwood, J R
core +2 more sources