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Thesis (M.A.)--Brock University, 2005. / Includes bibliographical references (leaves 196-219). Also available online (PDF file) by a subscription to the set or by purchasing the individual file.

Thesis (M.A.)--Brock University, 2005. / Includes bibliographical references (leaves 196-219)

This study presents the results of an analysis of the archaeological ceramics recovered from Maya sites on the island of Cozumel, Quintana Roo, Mexico. The field work was conducted in 1972-1973 by the Harvard University-University of Arizona Cozumel Archaeological Project which had as it focus the investigation of several aspects of long distance trade in Postclassic Maya society. The objectives of the study were (1) to analyze, classify, and describe the Cozumel ceramic remains, (2) to further clarify the island's prehistory through interpretation of ceramic data and relationships, and (3) to evaluate the Cozumel Archaeological Project's port of trade model from the standpoint of the ceramic evidence. Chapter 1 provides background information on the setting, history, and archaeology of Cozumel and adjacent coastal areas and summarizes the Cozumel Archaeological Project's research design and field investigations. This is followed in Chapter 2 by a discussion of the techniques of ceramic analysis employed in the study, including a brief summary of the type-variety system of ceramic classification. Chapters 3 through 10 present detailed descriptions of the ceramic complexes, arranged chronologically. Each variety of each ceramic type is described, including paste characteristics, surface finish, decoration, form, and comparative data. The Cozumel ceramic record indicates settlement on the island from Late Preclassic (ca. 300 B.C.-A.D. 300) through Late Postclassic (ca. A.D. 1250-1500/1550) times. An overview of the prehistory of Cozumel is presented in Chapter eleven. Chapter twelve presents the results of an attribute analysis of slipped serving dishes and unslipped jars which was undertaken to test the port of trade model. The model hypothesizes that Cozumel underwent a shift from a decentralized port of trade in the Early Postclassic, characterized by heterogeneity in archaeological remains, to a centralized trading center in the Late Postclassic, characterized by homogeneity. While the attribute analysis demonstrated an increase in intersite similarity and ceramic homogeneity in the Late Postclassic, results for the Early Postclassic were inconclusive. Chapter fourteen briefly summarizes the study's results and conclusions. Although the port of trade model was not verified by the ceramic evidence, there is considerable evidence that Cozumel may have been the site of a Toltec trade outpost in Early Postclassic times.

Island isolation can cause changes in body size, cranial characteristics, and genetic variation in mammals. We use geometric morphometrics to test skull and mandible shape and size change across three species of endemic Cozumel Island rodents in order to test the “island rule” of larger size in isolated rodents. We also sequenced the D-Loop and cytochrome b region of the mitochondrial genome and tested for differences in genetic variation between island and mainland groups, as well as population structure and gene flow in order to assess the effect of island isolation on these three rodents. We found that the three species of rodents showed varying degrees of size and shape differences from island to mainland with some species varying considerably and others not at all. The genetic results were similar with some species exhibiting potential founder effects, while others showed little differentiation between the island and mainland. We conclude that evolution on islands is highly conditional on the history, community composition, and biology of the colonizing species.