Results 1 to 10 of about 50 (47)

History of canids in Chile and impacts on prey adaptations. [PDF]

Ecol Evol, 2021
South American artiodactyls seem to be highly susceptible to feral dog predation, presenting a major conservation threat—why? We synthesize evidence as to whether feral dogs represent the first group‐hunting cursorial predator in regional evolutionary history.
Silva Rochefort B, Root-Bernstein M.
europepmc   +2 more sources

Ecology of a widespread large omnivore, Homo sapiens, and its impacts on ecosystem processes. [PDF]

Ecol Evol, 2019
The ecology of humans is usually considered separately and often using different concepts to those used for other species. We propose an ecological approach to humans based on the joint consideration of intraspecific variation and interspecific comparison.
Root-Bernstein M, Ladle R.
europepmc   +2 more sources

Cautionary tales on the use of proxies to estimate body size and form of extinct animals. [PDF]

Ecol Evol
Reconstructing the body size and form of extinct animals is of vital importance to our understanding of macroevolution and palaeontology. This is often done using anatomical proxies where extinct species are known only from fragmentary remains. However, there are many limitations influencing the selection of proxy taxa that are frequently overlooked ...
Gayford JH, Engelman RK, Sternes PC, Itano WM, Bazzi M, Collareta A, Salas-Gismondi R, Shimada K.   +7 more
europepmc   +2 more sources

Guanaco colonisation of Tierra del Fuego Island from mainland Patagonia: Walked, swam, or by canoe?

Geo: Geography and Environment, Volume 9, Issue 2, July‐December 2022., 2022
A geographical and biological puzzle that has perplexed scientists since the late 1800s working in southern South America: why are there so few vertebrates on the island of Tierra del Fuego compared to the adjacent Patagonia mainland, including the absence of the ubiquitous Guanaco (Lama guanicoe), wild camelid of the south? An interdisciplinary search
William L. Franklin
wiley   +1 more source

Anatomical study of the auditory region of Arctotherium tarijense (Ursidae, Tremarctinae), an extinct short‐faced bear from the Pleistocene of South America [PDF]

Journal of Anatomy, 2016
AbstractHere we present the most detailed morphological study of the auditory region of a tremarctinae bear, Arctotherium tarijense Ameghino. In addition, we provide new anatomical information of the Tremarctinae inner ear, such as coplanarity and deviation from orthogonality of the semicircular canals, as an approach to infer the head movements which ...
Arnaudo, Maria Eugenia, Bona, Paula, Soibelzon, Leopoldo Hector, Schubert, Blaine W.   +3 more
openaire   +4 more sources

First report of a South American short-faced bears' den (Arctotherium angustidens): palaeobiological and palaeoecological implications [PDF]

Alcheringa: An Australasian Journal of Palaeontology, 2009
Here we report the first example of associated short-faced bear fossils from South America. The specimens represent three individuals referable to the Ensenadan (early to middle Pleistocene) species Arctotherium angustidens (Ursidae, Tremarctinae), the giant South American short-faced bear.
Soibelzon, Leopoldo Héctor, Pomi, Lucas Horacio, Tonni, Eduardo Pedro, Rodríguez, Sergio G., Dondas, Alejandro   +4 more
openaire   +2 more sources

South American giant short-faced bear (Arctotherium angustidens) diet: evidence from pathology, morphology, stable isotopes, and biomechanics [PDF]

Journal of Paleontology, 2014
Arctotherium angustidensGervais and Ameghino, 1880 (the South American giant short-faced bear) is known for being the earliest (Ensenadan Age, early to middle Pleistocene) and largest (body mass over 1 ton) of five describedArctotheriumspecies endemic to South America. Here we assess the diet of this bear from multiple proxies: morphology, biomechanics,
Soibelzon, Leopoldo Héctor, Grinspan, Gustavo A., Bocherens, Hervé, Acosta, Walter G., Jones, Washington, Blanco, Ernesto R., Prevosti, Francisco   +6 more
openaire   +3 more sources

First Description of the Auditory Region of a Tremarctinae (Ursidae, Mammalia) Bear: The Case of Arctotherium angustidens

Journal of Mammalian Evolution, 2013
Here we present the first detailed morphological study of the auditory region of a tremarctine bear, the South American giant short-faced bear Arctotherium angustidens. We compared 19 specimens of A. angustidens with other tremarctines and ursines.
Arnaudo, Maria Eugenia, Soibelzon, Leopoldo Hector, Bona, Paula, Schubert, Blaine   +3 more
openaire   +3 more sources

The largest known bear,Arctotherium angustidens, from the early Pleistocene Pampean region of Argentina: with a discussion of size and diet trends in bears

Journal of Paleontology, 2011
The South American giant short-faced bear(Arctotherium angustidensGervais and Ameghino, 1880) is one of five describedArctotheriumspecies endemic to South America and it is known for being the earliest, largest, and most carnivorous member of the genus. Here we report an extraordinarily largeA.
Schubert, Blaine W., Soibelzon, Leopoldo Héctor   +1 more
openaire   +4 more sources

Presencia de Arctotherium (Carnivora, Ursidae, Tremarctinae) en un nivel pre-cultural de cueva Baño Nuevo-1 (Patagonia Central, Chile)

Estudios Geológicos, 2015
Se presenta la descripción de un I3 asignado a Arctotherium sp. proveniente del sitio Baño Nuevo-1 (Patagonia Central, Chile). El hallazgo fue realizado en la Capa 5 y está asociado a restos de Macrauchenia sp., Lama guanicoe, Felidae, Camelidae, Equidae y Mylodontidae dentro de un depósito estéril de material cultural, datado entre los ca. 13.500 y 11.
P. López Mendoza, F. Mena Larraín, E. Bostelmann   +2 more
openaire   +3 more sources