A5020431923- Primate Behavior and Ecology
- Evolution and Paleontology Studies
- Bat Biology and Ecology Studies
- Pleistocene-Era Hominins and Archaeology
- Wildlife Ecology and Conservation
- Animal Vocal Communication and Behavior
- Geology and Paleoclimatology Research
- Amphibian and Reptile Biology
- Marine animal studies overview
- Paleontology and Evolutionary Biology
- Animal Behavior and Reproduction
- Olfactory and Sensory Function Studies
- Fish biology, ecology, and behavior
- Plant and animal studies
- Biochemical Analysis and Sensing Techniques
- Species Distribution and Climate Change
- Morphological variations and asymmetry
- Geological formations and processes
- Forensic Anthropology and Bioarchaeology Studies
- Animal Ecology and Behavior Studies
- Ichthyology and Marine Biology
- Paleontology and Stratigraphy of Fossils
- Genetic diversity and population structure
- Temporomandibular Joint Disorders
- Human-Animal Interaction Studies
Duke University
2016-2025
Trinity College
2019-2020
Duke Medical Center
1995-2007
Duke University Hospital
1993-2005
New Mexico Institute of Mining and Technology
1999
University of Buenos Aires
1999
Queen's University
1999
Universidad Nacional de La Plata
1999
Decision Sciences (United States)
1997
Wildlife Conservation Society
1997
Measurements were taken on the upper and lower molars of 37 species primates one tupaiid to assess relative importance shearing, crushing grinding features. Significant correlations found between pairs allometrically standardized dimensions which measure same molar function (shearing, crushing, or grinding). Correlations do not are significant. Second adaptations for grinding, as well length second molar, total surface post-canine dentition negatively allometric with respect metabolic rate....
Abstract Masticatory movements and molar wear facets in species of Tupaia, Galago, Saimiri , Ateles have been examined using cinefluorography occlusal analysis. The molars compared with those a fossil series: Palenochtha, Pelycodus Aegyptopithecus. extant primates are almost identical their feeding behaviour, the timing masticatory cycle. Food is first puncture‐crushed where cycle elongated, power stroke attenuated abrasion produced on molars. Chewing follows, more complex, has two distinct...
Abstract Molar enamel is thicker among frugivorous extant Old World monkeys and apes than their folivorous close relatives. Furthermore, species that have the thickest molar reportedly eat fruits, seeds, nuts are so hard they cannot be broken by sympatric thinner‐enameled Species with relatively thick show no tendency toward a terrestrial feeding pattern. Members of Ramapithecinae, stock which probably gave rise to Pliocene‐Recent hominids, had very enamel. This suggests ate nuts, fruits...
Abstract Those Eocene prosimians which are possible catarrhine ancestors have four blade‐like crests on each lower molar. Each crest shears in sequence across two upper molar crests. Occluding concavely curved to hold the foods being sheared. of medial bordering principal crushing surface shear past single at about same time lateral contact second rank Grinding and areas restricted hypoconid, trigonid, protocone surfaces. Oligocene molars increased crushing‐grinding capacities maintained but...
The explanation of patterns in species richness ranks among the most important tasks ecology. Current theories emphasize interaction between historical and geographical factors affecting size regional pool locally acting processes such as competitive exclusion, disturbance, productivity, seasonality. Local richness, or alpha diversity, plants primary consumers has been claimed to peak habitats low intermediate which, if true, major implications for conservation. Here, by contrast, we show...
Abstract Social and ecological factors are important in shaping sexual dimorphism Anthropoidea, but there is also a tendency for body‐size canine to increase with increased body size (Rensch's rule) (Rensch: Evolution Above the Species Level . London: Methuen, 1959.) Most ecologists interpret Rensch's rule be consequence of social selective that covary size, recent claims have been advanced principally selection alone. Here we assess effects dimorphism, structure on among platyrrhine...
Undisputed anthropoids appear in the fossil record of Africa and Asia by middle Eocene, about 45 Ma. Here, we report discovery an early Eocene eosimiid anthropoid primate from India, named Anthrasimias , that extends Asian 9–10 million years. A phylogenetic analysis 75 taxa 343 characters skull, postcranium, dentition living primates indicates basal placement among eosimiids, confirms status Eosimiidae, suggests crown haplorhines (tarsiers monkeys) are sister clade Omomyoidea not nested...
Adaptive shifts associated with human origins are brought to light as we examine the fossil record and study our own genome that of closest ape relatives. However, more ancient roots many characteristics revealed through a broader array living anthropoids increasingly dense earliest anthropoid radiations. Genomic data fossils early primates in Asia Africa clarify relationships among major clades primates. Progress comparative anatomy, genomics, molecular biology point key changes sensory...
Animal locomotion causes head rotations, which are detected by the semicircular canals of inner ear. Morphologic features influence rotational sensitivity, and so it is hypothesized that canal morphology functionally related. Most prior research has compared subjective assessments animal “agility” with a single determinant sensitivity: mean radius curvature ( R ). In fact, paired variables body mass correlated agility have been used to infer in extinct species. To refine models functional...