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Articles 1 - 27 of 27
Full-Text Articles in Biological and Physical Anthropology
Understanding The Environmental And Genetic Influence On Fluctuating Asymmetry And Developmental Instability In Primates, Ashly N. Romero
Understanding The Environmental And Genetic Influence On Fluctuating Asymmetry And Developmental Instability In Primates, Ashly N. Romero
Graduate Theses and Dissertations
This dissertation explored the impact of environmental factors on the development and perpetuation of fluctuating asymmetry (FA) and sought to understand the role evolution may play in the FA exhibited in two primate populations: the free-ranging Cayo Santiago rhesus macaques (Macaca mulatta) and the Southwest National Primate Research Center olive baboons (Papio hamadryas anubis). Demographic, ontogenetic, secular, external, and genetic factors were examined. Specifically, this dissertation investigated FA over all ontogenetic stages, across decades, between sexes, in association with ecological catastrophes, and with tooth pathology to try and tease apart factors that may influence FA and developmental instability. This dissertation …
Dental Microwear Of Miocene Primates From The Turkana Basin Of Northern Kenya, Leah K. Myerholtz
Dental Microwear Of Miocene Primates From The Turkana Basin Of Northern Kenya, Leah K. Myerholtz
Graduate Theses and Dissertations
Comprehending the dietary patterns of Turkana Basin primates from the late Paleogene and early Neogene can contextualize the role of food choice in the evolution of higher primates in Africa. Dental Microwear Texture Analysis (DMTA) quantifies wear on the enamel of a tooth and can be used as a proxy to infer aspects of a taxon’s diet in the past. DMTA can provide insight into what specific animals in the past ate, rather than what they were capable of eating, and by extension, reflect food availability related to habitat preferences or environmental fluctuation. Here, primates from six Oligocene through Pliocene …
Fatty Females And Muscular Males: Investigating Human Sexual Dimorphism Across The Upper And Lower Skeleton, Brooklin Edwards
Fatty Females And Muscular Males: Investigating Human Sexual Dimorphism Across The Upper And Lower Skeleton, Brooklin Edwards
Anthropology Undergraduate Honors Theses
The sexual dimorphism profile of human body composition produces a unique pattern. Compared to other primates, humans have a mild size dimorphism; however, human males have a particularly muscular upper body and human females have a permanent fatty composition. These findings have resulted in varying interpretations related to sexual selection, mating systems, and male competition. Using humerus and femur measurements collected from 9 primate species, we investigated how the pronounced sexually dimorphic tissue composition of humans influences skeletal elements compared to the other primates. We hypothesized that over the course of human evolution, human females developed a body composition that …
Diet And Nutrition Of Lemurs In The Lean Season, Santiago Cassalett
Diet And Nutrition Of Lemurs In The Lean Season, Santiago Cassalett
Dissertations, Theses, and Capstone Projects
Animals must navigate complex food and nutrient environments that are constantly in flux to obtain the macro and micronutrients necessary for their growth, reproduction, and survival. The nutritional needs of animals also vary over the life course, further complicating the search for adequate foods and the nutrients within them. The hypervariable and unpredictable environment of Madagascar creates a complex nutrient landscape for lemurs in particular because they are subject to large fluctuations in food availability. These fluctuations are thought to create extreme periods of nutritional stress during the dry season (known as the lean season) for lemurs. In response, lemurs …
Canine Microwear In Relation To Diet In Sumatran Primates And African Great Apes, Putu Pujiantari
Canine Microwear In Relation To Diet In Sumatran Primates And African Great Apes, Putu Pujiantari
Graduate Theses and Dissertations
This thesis considers canine microwear in relation to diet in five Sumatran primates (Pongo abelii, Hylobates lar, Hylobates agilis, Presbytis thomasi, and Macaca fascicularis) and two African great apes (Pan paniscus and Pan troglodytes schweinfurthii) using both microwear texture analysis and microwear feature analysis techniques. Statistical results for texture analysis show that there are significant differences in scale of maximum and heterogeneity. This indicates that some species have large pits on their canine surfaces, having these dominated by deep features at coarse scale yet have a slight microwear heterogeneity. For feature analysis, all variables show statistically significant variation. Variance in …
Case 3847 – Simopithecus Oswaldi Andrews, 1916 (Currently Theropithecus Oswaldi; Mammalia, Primates, Cercopithecidae), Proposed Conservation By Reversal Of Precedence With Cynocephalus Atlanticus Thomas, 1884., Eric Delson, David M. Alba, Stephen R. Frost, Dagmawit Abebe Getahun, Christopher C. Gilbert
Case 3847 – Simopithecus Oswaldi Andrews, 1916 (Currently Theropithecus Oswaldi; Mammalia, Primates, Cercopithecidae), Proposed Conservation By Reversal Of Precedence With Cynocephalus Atlanticus Thomas, 1884., Eric Delson, David M. Alba, Stephen R. Frost, Dagmawit Abebe Getahun, Christopher C. Gilbert
Publications and Research
The purpose of this application, under Articles 23.9.3 and 81.1 of the Code, is to conserve the usage of the species-group name Simopithecus oswaldi Andrews, 1916 by giving it precedence over its senior subjective synonym Cynocephalus atlanticus Thomas, 1884. Theropithecus is a common to dominant member of the extinct primate community across Africa after 4 million years ago (Jablonski & Frost, 2010) and often co-occurred with extinct humans (Hominini); fossils are also known rarely across Eurasia (Roberts et al., 2014). Most fossil samples are currently included in Theropithecus oswaldi (Andrews, 1916), which is often divided into chrono-geographic subspecies. Cynocephalus atlanticus …
The Internal, External And Extended Microbiomes Of Hominins, Robert R. Dunn, Katherine R. Amato, Elizabeth A. Archie, Mimi Arandjelovic, Alyssa N. Crittenden, Lauren M. Nichols
The Internal, External And Extended Microbiomes Of Hominins, Robert R. Dunn, Katherine R. Amato, Elizabeth A. Archie, Mimi Arandjelovic, Alyssa N. Crittenden, Lauren M. Nichols
Anthropology Faculty Research
The social structure of primates has recently been shown to influence the composition of their microbiomes. What is less clear is how primate microbiomes might in turn influence their social behavior, either in general or with particular reference to hominins. Here we use a comparative approach to understand how microbiomes of hominins have, or might have, changed since the last common ancestor (LCA) of chimpanzees and humans, roughly six million years ago. We focus on microbiomes associated with social evolution, namely those hosted or influenced by stomachs, intestines, armpits, and food fermentation. In doing so, we highlight the potential influence …
The Functional Morphology Of Ingestion In The Platyrrhine Sclerocarpic Harvesters (Platyrrhini, Primates), Zachary Stoffel Klukkert
The Functional Morphology Of Ingestion In The Platyrrhine Sclerocarpic Harvesters (Platyrrhini, Primates), Zachary Stoffel Klukkert
Dissertations, Theses, and Capstone Projects
The identification of anatomical correlates of diet and feeding behavior in nonhuman primates is an important area of research in biological anthropology. The morphology of the jaws and teeth reflects the phylogeny and adaptations that distinguish taxa and their different ecological niches. Studying the form-function relationships of jaws and teeth in modern species provides a framework for interpreting the diets of extinct species and for inferring the ecological pressures that may have contributed to the evolutionary diversification of primate craniodental morphology. Previous work on modeling primate jaw mechanics has focused largely on the functional context of a closed jaw. Little …
Using Entheseal Length To Infer Locomotor Type, Antonio R. Otero
Using Entheseal Length To Infer Locomotor Type, Antonio R. Otero
LSU Master's Theses
An enthesis is a marking (tuberosity or impression) on bone where a muscle or tendon attaches and it can be influenced by age, sex, physical activity, and muscle size. This study ascertains whether entheses, long bones, and their respective ratios can be used as an indicator for mode of locomotion in four primate species: Ateles geoffroyi (Geoffroy’s spider monkey), Colobus guereza (mantled guereza), Hylobates lar (lar gibbon), and Macaca mulatta (rhesus monkey). Seven entheses on four long bones were chosen based on importance of the muscle in relation to specific locomotor types, use in other studies, and …
Climatic Variables Are Strong Predictors Of Allonursing And Communal Nesting In Primates, Alexandra Louppova
Climatic Variables Are Strong Predictors Of Allonursing And Communal Nesting In Primates, Alexandra Louppova
Theses and Dissertations
Allomaternal care (AMC) is widespread throughout the primate order, previous studies have focused on benefits and costs to individuals. However, our understanding of environmental impacts on AMC behaviors in primates is still limited. Our study examines how ecology and environmental factors can predict certain AMC behaviors more than others.
Using Machine Learning To Classify Extant Apes And Interpret The Dental Morphology Of The Chimpanzee-Human Last Common Ancestor, Tesla A. Monson, David W. Armitage, Leslea J. Hlusko
Using Machine Learning To Classify Extant Apes And Interpret The Dental Morphology Of The Chimpanzee-Human Last Common Ancestor, Tesla A. Monson, David W. Armitage, Leslea J. Hlusko
Anthropology Faculty and Staff Publications
Machine learning is a formidable tool for pattern recognition in large datasets. We developed and expanded on these methods, applying machine learning pattern recognition to a problem in paleoanthropology and evolution. For decades, paleontologists have used the chimpanzee as a model for the chimpanzee-human last common ancestor (LCA) because they are our closest living primate relative. Using a large sample of extant and extinct primates, we tested the hypothesis that machine learning methods can accurately classify extant apes based on dental data. We then used this classification tool to observe the affinities between extant apes and Miocene hominoids. We assessed …
Wild Primates In Documentary Films: Biodiversity, Behavior, And Pedagogical Applications, Crystal Marie Riley Koenig
Wild Primates In Documentary Films: Biodiversity, Behavior, And Pedagogical Applications, Crystal Marie Riley Koenig
Arts & Sciences Electronic Theses and Dissertations
The representation of wild primates in the nature documentary genre could have important implications for conservation and education. However, no prior research has looked at the content of this genre or its use in education. To fill this gap, the current research included a content analysis of all available documentaries focused on wild primates (n = 210) and a survey of 219 college-level anthropology instructors, with an emphasis on determining how primate biodiversity was portrayed, whether primate behavior was realistically depicted in documentaries, whether mistakes and inaccuracies were common, and how college instructors use primate documentaries as resources in their …
Metacarpal Ratio And Its Relation To Sexual Dimorphism In Primates With Different Mating Strategies, Emilee Hart
Metacarpal Ratio And Its Relation To Sexual Dimorphism In Primates With Different Mating Strategies, Emilee Hart
LSU Master's Theses
The digit ratio (2D:4D) is a sexually dimorphic trait in mammalian hands that is a result of levels of prenatal androgen exposure (PNAE) during limb development. Previous studies have shown that females have a higher ratio than males and that sexual dimorphism in the ratio is greater in species with polygynous mating strategies and high levels of intermale aggression compared to monogamous species with low intermale aggression. This study used metacarpals instead of phalanges to test the hypotheses that the metacarpal ratio (2Mc:4Mc) will be higher in females than males within a species and that the ratio would be more …
Population Genomics Of A Baboon Hybrid Zone In Zambia, Kenneth Lyu Chiou
Population Genomics Of A Baboon Hybrid Zone In Zambia, Kenneth Lyu Chiou
Arts & Sciences Electronic Theses and Dissertations
Hybridization is increasingly recognized as a common, important process shaping the evolution of organisms including humans. Across hybrid zones, the genomes of incipient species are mixed and recombined through hybridization and backcrossing, creating conditions ideal for evaluating the actions of natural selection on gene variants in novel genomic contexts. This dissertation aims to increase our understanding of hybridization using a Zambian baboon study system in which two species, Kinda baboons (Papio kindae) and grayfoot baboons (Papio griseipes), hybridize despite exhibiting pronounced differences in body size and behavior. Using genome-wide genotypic data prepared using double-digest RADseq, I scan for genomic regions …
Investigating The Genetic Basis For Hominoid Taillessness, Samantha M. Tickey-Mccrane, Holly Dunsworth, Johanna E. Wegener
Investigating The Genetic Basis For Hominoid Taillessness, Samantha M. Tickey-Mccrane, Holly Dunsworth, Johanna E. Wegener
Senior Honors Projects
Investigating the Genetic Basis for Hominoid Taillessness:
A Comparative Genetic Approach Across Ten Catarrhine Taxa
Samantha Tickey-McCrane1,2, Johanna E. Wegener2, and Holly Dunsworth1
Honors Thesis Abstract Written by Samantha Tickey-McCrane, Departments of Anthropology & Biology
Advisor: Dr. Holly Dunsworth, Department of Anthropology
How did hominoid tail loss occur? My goals are to test phylogenetic and adaptive hypotheses for tail length variation among macaques, and use those insights to reconstruct the evolution of hominoid taillessness. Further, I aim to ultimately uncover which candidate genes or pathways may be responsible for catarrhine tail loss, and what other traits may be affected by …
Do Non-Human Primates Have Gender?, Aaron Pelchat
Do Non-Human Primates Have Gender?, Aaron Pelchat
Senior Honors Projects
As activism for trans rights and gender equality becomes ever more prevalent in the current American political discourse, so too has there been a rise in questions about gender. Are sexuality and gender linked? Aren’t there only two genders? What is the difference between gender and sex? Is there a difference? How does one DO gender? Isn’t gender just something you are born with? Helping the public understand these questions is important to transgender and gender non-conforming individuals in a time when more people are “coming out of the closet” and identifying as genders other than cisgender. As an anthropologist, …
A Quantitative Genetic Analysis Of Craniofacial Variation In Baboons, Jessica Lynn Joganic
A Quantitative Genetic Analysis Of Craniofacial Variation In Baboons, Jessica Lynn Joganic
Arts & Sciences Electronic Theses and Dissertations
This dissertation is an explication of baboon craniofacial variation and its genetic basis. Intraspecific variation is the result of input from and complex interactions among genetic information, functional demands, and developmental processes. The relative effect of each of these on craniofacial variation, as well as the degree of inter-trait covariance, determines whether traits can respond to selection and what that response might look like. Using a sample of pedigreed baboons, I quantify craniofacial variation to address specific questions regarding the distribution and magnitude of phenotypic, genetic, and environmental variation patterns. In addition, I identify regions of the genome containing genetic …
Dietary Adaptations And Intra- And Interspecific Variation In Dental Occlusal Shape In Hominin And Non-Hominin Primates, Kelsey O'Neill
Dietary Adaptations And Intra- And Interspecific Variation In Dental Occlusal Shape In Hominin And Non-Hominin Primates, Kelsey O'Neill
Theses and Dissertations
Dental morphology and tooth shape have been used to recreate the
dietary adaptations for extinct species, and thus dental variation can provide
information on the relationship between fossil species and their
paleoenvironments. Variation in living species with known behaviors can provide
a baseline for interpreting morphology, and behavior, in the fossil record.
Tooth occlusal surface outlines in hominins and non-hominin primates, and other
mammals, have been used for assessments of taxonomic significance, with
variability often considered as being primarily phylogenetic. Few studies have
attempted to assess how diet might influence the pattern of variability in closely
related species. Here the …
Digital Baboon: Curating 30 Years Of Primatology Research Data, Cynthia Hudson-Vitale, Jennifer Moore
Digital Baboon: Curating 30 Years Of Primatology Research Data, Cynthia Hudson-Vitale, Jennifer Moore
University Libraries Presentations
Many digital data curators will agree that making digital storage, online platform, digitization best practices, and metadata schema choices is a complicated process, even for a simple database. Curating a project that encompasses tooth casts, palm prints, field sheets, videos, images, and a database assembled over a thirty-year period extends those challenges, but also creates an opportunity to preserve and share an irreplaceable contribution to research. Librarians at Washington University in St. Louis are currently working with Dr. Jane Phillips-Conroy, Professor of Physical Anthropology; Anatomy and Neurobiology, to digitally curate this heterogeneous mix of physical and digital data. Dr. Phillips-Conroy’s …
Is There Variation In The Effects Of Primate Size As Seed Dispersers?: Seed And Seedling Performance After Gut Simulation Treatments In Hydrochloric Acid, Denise Chac
Chancellor’s Honors Program Projects
No abstract provided.
Primate Energy Eexpenditure And Life History, Herman Pontzer, David A. Raichlen, Adam D. Gordon, Kara K. Schroepfer-Walker, Brian Hare, Matthew C. O’Neill, Kathleen M. Muldoon
Primate Energy Eexpenditure And Life History, Herman Pontzer, David A. Raichlen, Adam D. Gordon, Kara K. Schroepfer-Walker, Brian Hare, Matthew C. O’Neill, Kathleen M. Muldoon
Dartmouth Scholarship
Humans and other primates are distinct among placental mammals in having exceptionally slow rates of growth, reproduction, and aging. Primates’ slow life history schedules are generally thought to reflect an evolved strategy of allocating energy away from growth and reproduction and toward somatic investment, particularly to the development and maintenance of large brains. Here we examine an alternative explanation: that primates’ slow life histories reflect low total energy expenditure (TEE) (kilocalories per day) relative to other placental mammals. We compared doubly labeled water measurements of TEE among 17 primate species with similar measures for other placental mammals. We found that …
A Penile Spine/Vibrissa Enhancer Sequence Is Missing In Modern And Extinct Humans But Is Retained In Multiple Primates With Penile Spines And Sensory Vibrissae, Philip L. Reno, Cory Y Mclean, Jasmine E Hines, Terence D Capellini, Gill Bejerano, David M Kingsley
A Penile Spine/Vibrissa Enhancer Sequence Is Missing In Modern And Extinct Humans But Is Retained In Multiple Primates With Penile Spines And Sensory Vibrissae, Philip L. Reno, Cory Y Mclean, Jasmine E Hines, Terence D Capellini, Gill Bejerano, David M Kingsley
PCOM Scholarly Papers
Previous studies show that humans have a large genomic deletion downstream of the Androgen Receptor gene that eliminates an ancestral mammalian regulatory enhancer that drives expression in developing penile spines and sensory vibrissae. Here we use a combination of large-scale sequence analysis and PCR amplification to demonstrate that the penile spine/vibrissa enhancer is missing in all humans surveyed and in the Neandertal and Denisovan genomes, but is present in DNA samples of chimpanzees and bonobos, as well as in multiple other great apes and primates that maintain some form of penile integumentary appendage and facial vibrissae. These results further strengthen …
Fracture In Teeth—A Diagnostic For Inferring Bite Force And Tooth Function, Paul J. Constantino, Brian R. Lawn, James J.-W. Lee, Peter W. Lucas
Fracture In Teeth—A Diagnostic For Inferring Bite Force And Tooth Function, Paul J. Constantino, Brian R. Lawn, James J.-W. Lee, Peter W. Lucas
Biological Sciences Faculty Research
Teeth are brittle and highly susceptible to cracking. We propose that observations of such cracking can be used as a diagnostic tool for predicting bite force and inferring tooth function in living and fossil mammals. Laboratory tests on model tooth structures and extracted human teeth in simulated biting identify the principal fracture modes in enamel. Examination of museum specimens reveals the presence of similar fractures in a wide range of vertebrates, suggesting that cracks extended during ingestion or mastication. The use of ‘fracture mechanics’ from materials engineering provides elegant relations for quantifying critical bite forces in terms of characteristic tooth …
Coping With Forest Fragmentation: A Comparison Of Colobus Angolensis Palliatus Dietary Diversity And Behavioral Plasticity In The East Sagara Forest, Tanzania., Noah T. Dunham
Honors Projects
Habitat destruction and forest fragmentation are perhaps the largest threats to primate species around the world. While national parks, games reserves, and primate sanctuaries are instrumental in primate conservation, research suggests that some non-governmentally protected forest fragments may also serve as viable habitats for primates. Of course not all primates respond to fragmentation in the same way, but a species’ ability to survive in a fragment relates to 1) home range size 2) degree of frugivory 3) dietary flexibility and behavioral plasticity and 4) ability to utilize matrix habitats. Here I describe these variables in relation to black and white …
Squirrel Monkey Pelvic Morphology And Difficult Pregnancies: It's Not All In The Hips, Lucinda Freeman
Squirrel Monkey Pelvic Morphology And Difficult Pregnancies: It's Not All In The Hips, Lucinda Freeman
Anthropology Undergraduate Senior Theses
Researchers at the CNPRR have observed a reduction in the reproductive success of female squirrel monkeys of Bolivian origin (Saimiri boliviensis boliviensis) due to nonviable termination of their pregnancies. Difficulties with pregnancy, including dystopias and stillborn infants, seem to be a result of an extremely large fetal to mother weight ratio. This factor has led to studies of the pelvic size and shape in the Bolivian origin female squirrel monkeys. Aksel and Able (1983) devised a pelvimetry method for evaluating the bony structures of the pelvis in order to predict perinatal outcome. This thesis will apply the pelvimetry methods of …
Mom's Day Out: Investigating The Proximate Causes Of Allomothering In Squirrel Monkeys, Amber Wright
Mom's Day Out: Investigating The Proximate Causes Of Allomothering In Squirrel Monkeys, Amber Wright
Anthropology Undergraduate Senior Theses
Allomothering, which is defined as non-material infant care, is a behavior that is found among many animal species. Although it is widely acknowledged in primate species in particular, it is not well understood. Allomaternal behavior is well documented but the proximal causes are not known. Most primate species live in groups and have intense social relations which govern every aspect of their behavior. Allomothering could then be better understood by looking at the social relationships that exist between members of a group. This research tries to better understand what causes certain females to allomother over others by looking at the …
The Vcl Hypothesis Revisited: Patterns Of Femoral Morphology Among Quadrupedal And Saltatorial Prosimian Primates, Robert Anemone
The Vcl Hypothesis Revisited: Patterns Of Femoral Morphology Among Quadrupedal And Saltatorial Prosimian Primates, Robert Anemone
Robert L. Anemone
The descriptive and functional morphology of the postcranium of the vertical clinging and leaping prosimians is of great interest in both adaptational and phylogenetic studies of extant and extinct primates. An analysis of patterns of femoral morphology among quadrupedal and saltatory living prosimians indicates the presence of at least two, and possibly three, distinct femoral adaptations to the demands of an arboreal, saltatory existence. Osteological measurements were taken on 277 postcranial skeletons representing eight prosimian families, with skeletal trunk length (Biegert and Maurer, Folia Primatol. 17:142–156, 1972) used as an estimator of body size in both bivariate and multivariate (discriminant …