How Humans Evolved (Seventh Edition)
Give students a complete picture of human evolution.
How Humans Evolved teaches the processes that shape human evolution with a unique blend of evolutionary theory, population genetics, and behavioral ecology. The new edition continues to offer the most up-to-date research―in particular, significantly revised coverage of how recent discoveries are shaping our history of human evolution―while now giving you the best tools to engage your students in and out of the classroom.
left is guarding the (larger) female below him. Biologist Scott Carroll painted numbers on the bugs in order to identify individuals. (Photograph courtesy of Scott Carroll.) FIGURE 3.13 So far we have considered the evolution of morphological characters, like beak depth and eye morphology, that do not change once an individual has reached adulthood. In much of this book, we will be interested in the evolution of the behavior of humans and other primates. Behavior is different from morphology in
2006, “The Nature of Plant Species,” Nature 440:524 –527.) FIGURE 4.5 Seed plants 0.0 1.0 Fraction of species Not reproductively isolated Reproductively isolated rators at Indiana University indicates that a substantial fraction of species are not reproductively isolated (Figure 4.5). In addition, a number of species have maintained their coherence with no gene flow between isolated subpopulations. For example, the checkerspot butterfly (Figure 4.6) is found in scattered populations
natural selection and other evolutionary processes shaped the human species is relevant to all of the academic disciplines that are concerned with human beings. This vast intellectual domain includes medicine, psychology, the social sciences, and even the humanities. Beyond academia, understanding our own evolutionary history can help 0c_Prologue [3p]:How Humans Evolved [5e] 10/30/08 11:55 AM Page xxiii Why Study Human Evolution? xxiii us answer many questions that confront us in everyday
endangered by (1) habitat destruction, (2) hunting, or (3) live capture for trade and export. Sadly, no introduction to the primate order would be complete without acknowledgment that the prospects for the continued survival of many primate species are grim. Today, nearly 100 primate species are considered to be endangered or critically endangered, and are in real danger of extinction. Already, primate conservation biologists believe that one subspecies, Miss Waldron’s red colobus, has become
reproductive success is limited by the availability of resources within the local habitat. When females have better access to high-quality resources, they grow faster, mature earlier, and give birth at shorter intervals. At a number of sites in Japan, for example, free-ranging monkeys’ natural diets have been supplemented with wheat, sweet potatoes, rice, and other foods by humans for many years (Figure 6.6). This has led to rapid increases in group size (Figure 6.7). Comparisons of wild and