摘要：The main goal of this research is to study the population structure of the north-Adriatic island of Rab, clustering analysis of the survey participants (inhabitants from five settlements on the Rab) in relation to their complex phenotypic characteristics (physiological, biochemical and morphological). Another objective was to analyze the grouping of populations on eastern Adriatic islands, compared to their complex phenotypic characteristics, where is a population of Rab observed as homogeneous.The sample of participants included 601 participants aged 18 to 75. The five subpopulations are analyzed: Banjol with 96 participants, 157 participants with Barbat, Rab with 109, Supetarska Draga with 100 and Lopar with 139 participants, which good represented the whole island.Results of the assessment of biological distances between subpopulations of the island of Rab, showed that the most distant, for both sexes, was a subpopulation of Rab. The other examined subpopulations according to their morphological, physiological and biochemical characteristics are more or less grouped into one cluster. Results of the assessment of "biological distance" among the population of the island of Rab as a single population and population groups with other Dalmatian islands (that are geographically closer or farther away), showed that the population of the island of Rab-specific and biologically from the other island population of the Adriatic.Biological distances are not associated with the geographic distances between settlements on the island, which is consistent with historical data about settling in different areas of land, in different periods and their reproductive isolation during the time of their residence on the island. The fact that Rab (with the remaining two islands), is distinguished by its complex phenotypic features, makes Rab the representative of the biological isolates.
