American journal of physical anthropology
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Am. J. Phys. Anthropol. · Mar 1989
The anterior buccal mandibular depressions: ontogeny and phylogeny.
The frequency of an anterior buccal depression in the mandible (ABMD), or a mental fossa, is reported on 970 human mandibles of various groups and different ages, as well as in 38 mandibles of nonhuman primates. The ontogenetic and phylogenetic significance of the results relevant to development of a chin in Homo sapiens is discussed. The ABMD is also compared with the occurrence of a lingual mandibular depression.
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Am. J. Phys. Anthropol. · Aug 1982
A method of analyzing density-dependent vital rates with an application to the Gainj of Papua New Guinea.
A method of estimating age-specific coefficients of density-dependent variation in fertility and mortality is developed; the method is applicable to longitudinal data on population size and the number of births and deaths classified by age. Given a sufficiently large data set, it is possible to estimate both the sensitivity of each age class to density-dependent damping and the density effect of each age class on every age class in the population. ⋯ This finding suggests that the size of the population is regulated by mortality rather than fertility. Individuals aged less than five years and greater than 50 years are particularly sensitive to density-dependent survival damping; individuals of adolescent and early reproductive age are not themselves damped, but appear to be responsible for the observed damping.