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Full-Text Articles in Social and Behavioral Sciences
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 …
Scaling Relationships Between Cranial Morphological Features And Cranial Capacity In Modern Humans, Jacob Jesch
Scaling Relationships Between Cranial Morphological Features And Cranial Capacity In Modern Humans, Jacob Jesch
LSU Master's Theses
Certain cranial morphologies referred to here as “cranial predictor features” are known to allometrically scale with body mass at statistically significant levels. Brain size likewise is known to scale with body mass, with brain-to-body-mass ratio being expressed numerically via the encephalization quotient. The study at hand aims to demonstrate whether brain size via its skeletal proxy of cranial capacity also scales with cranial predictor features. Correlation analysis was employed on two samples of contemporary male and female modern humans, respectively, in order to determine the statistical significance and degree of association between cranial predictor features and cranial capacity, as well …