Voyaging through the Contemporary Pacific.

Voyaging through the Contemporary Pacific. David Hanlon and Geoffrey. White. eds. Lanham, MD: Rowman and Littlefield Publishers, Inc., 2000. 456 pp.     

Mayr on the Polynesian Region

[Borders and Subdivisions of the Polynesian Region, as based on our Knowledge of the Distribution of Birds, pp. 191–195. The Origin and History of the Bird fauna of Polynesia, pp. 197–216. By Ernst Mayr. Proc. Sixth Pacific Science Congress, held at Berkeley, Wis., in July and August 1939, vol. iv.]     

Use of the sago palmMetroxylon warburgii in the Polynesian Island,Rotuma

The manufacture of edible starch products from sago palms of the genus Metroxylon is common to indigenous people throughout Melanesia but is unknown in Polynesia, even in areas where Metroxylon species occur. We here report the use of Metroxylon as a starch source in the isolated Polynesian island of Rotuma. In Rotuma, Metroxylon warburgii (Heim) Beccari grows wild, but is likely the result of an aboriginal introduction from Melanesia. Samoan ethnohistorical accounts indicate that Metroxylon warburgii was introduced to Samoa from Rotuma. Rotuman manufacture of starch from M. warburgii appears to date from pre-European times as indicated by written accounts of early visitors to Rotuma and Rotuman oral histories. We provide details of the process of starch manufacture in Rotuma and speculate on possible means by which this technology was transferred from Melanesia to Rotuma.     

Ancient voyaging and Polynesian origins

The "Polynesian motif" defines a lineage of human mtDNA that is restricted to Austronesian-speaking populations and is almost fixed in Polynesians. It is widely thought to support a rapid dispersal of maternal lineages from Taiwan ~4000 years ago (4 ka), but the chronological resolution of existing control-region data is poor, and an East Indonesian origin has also been proposed. By analyzing 157 complete mtDNA genomes, we show that the motif itself most likely originated >6 ka in the vicinity of the Bismarck Archipelago, and its immediate ancestor is >8 ka old and virtually restricted to Near Oceania. This indicates that Polynesian maternal lineages from Island Southeast Asia gained a foothold in Near Oceania much earlier than dispersal from either Taiwan or Indonesia 3-4 ka would predict. However, we find evidence in minor lineages for more recent two-way maternal gene flow between Island Southeast Asia and Near Oceania, likely reflecting movements along a "voyaging corridor" between them, as previously proposed on archaeological grounds. Small-scale mid-Holocene movements from Island Southeast Asia likely transmitted Austronesian languages to the long-established Southeast Asian colonies in the Bismarcks carrying the Polynesian motif, perhaps also providing the impetus for the expansion into Polynesia.     

The Polynesian chin and mandible

We noted the similarity in mandibular profile between a 27,000-year-old skull from China and a 160-year-old Polynesian skull. Both had a more vertical ramus, a curved inferior border, and no chin. The European mandible has a greater gonial angle, an antegonial notch, and a chin. Is the presence of a chin sufficient to distinguish European mandible from Polynesian? Can the gonial angle and ramus shape do so? A blind study of fifty mandibles of both groups and both sexes revealed that each feature alone can differentiate the sexes, but the combination is required, to differentiate European and Polynesian, and loosely group their provenances.     

Twice Dead: Organ Transplants and the Reinvention of Death.

Twice Dead: Organ Transplants and the Reinvention of Death. Margaret Lock. Berkeley: University of California Press, 2002. xii. 429pp.     

Microbial Communities and Exopolysaccharides from Polynesian Mats

Microbial mats present in two shallow atolls of French Polynesia were characterized by high amounts of exopolysaccharides associated with cyanobacteria as the predominating species. Cyanobacteria were found in the first centimeters of the gelatinous mats, whereas deeper layers showing the occurrence of the sulfate reducers Desulfovibrio and Desulfobacter species as determined by the presence of specific biomarkers. Exopolysaccharides were extracted from these mats and partially characterized. All fractions contained both neutral sugars and uronic acids with a predominance of the former. The large diversity in monosaccharides can be interpreted as the result of exopolymer biosynthesis by either different or unidentified cyanobacterial species. Received July 25, 2000; accepted October 21, 2000     

Polynesian face and dentition: functional perspective

Widely dispersed throughout the Pacific, Polynesians are a biologically distinctive people in form and size of both body and head. Large-bodied and well-muscled, their body phenotype is suited to life in a thermolabile oceanic environment. Their craniofacial skeleton is large and robust, with mandibular size and form (the "rocker" mandible) being especially characteristic. In this paper the Polynesian variants of body form, and of facial size (including dentition) and form, are interpreted from a functional perspective.     

Melanesian origin of Polynesian Y chromosomes

BACKGROUND: Two competing hypotheses for the origins of Polynesians are the 'express-train' model, which supposes a recent and rapid expansion of Polynesian ancestors from Asia/Taiwan via coastal and island Melanesia, and the 'entangled-bank' model, which supposes a long history of cultural and genetic interactions among Southeast Asians, Melanesians and Polynesians. Most genetic data, especially analyses of mitochondrial DNA (mtDNA) variation, support the express-train model, as does linguistic and archaeological evidence. Here, we used Y-chromosome polymorphisms to investigate the origins of Polynesians. RESULTS: We analysed eight single nucleotide polymorphisms (SNPs) and seven short tandem repeat (STR) loci on the Y chromosome in 28 Cook Islanders from Polynesia and 583 males from 17 Melanesian, Asian and Australian populations. We found that all Polynesians belong to just three Y-chromosome haplotypes, as defined by unique event polymorphisms. The major Y haplotype in Polynesians (82% frequency) was restricted to Melanesia and eastern Indonesia and most probably arose in Melanesia. Coalescence analysis of associated Y-STR haplotypes showed evidence of a population expansion in Polynesians, beginning about 2,200 years ago. The other two Polynesian Y haplotypes were widespread in Asia but were also found in Melanesia. CONCLUSIONS: All Polynesian Y chromosomes can be traced back to Melanesia, although some of these Y-chromosome types originated in Asia. Together with other genetic and cultural evidence, we propose a new model of Polynesian origins that we call the 'slow-boat' model: Polynesian ancestors did originate from Asia/Taiwan but did not move rapidly through Melanesia; rather, they interacted with and mixed extensively with Melanesians, leaving behind their genes and incorporating many Melanesian genes before colonising the Pacific.     

Fatty acid composition of the depot fats of the Polynesian rat,Rattus exulans,Tokelau Islands

The fatty acid composition of the stomach contents, adipose tissue, and perinephric fat of Polynesian rats (Rattus exulans Peale), from the Tokelau Is indicated that the dietary fat consisted mainly, if not exclusively, of coconut oil. Lower ratios of lauric : myristic acids were found in the depot fats of the Polynesian rats than in the dietary coconut oil. These results were consistent with chain elongation of lauric to myristic acid after ingestion, as previously reported in rats and other mammals.     

Myth, Memory, and the Oral Tradition: Cicero in the Trobriands

In nonliterate societies, myths are often linked to specific geographical locations. Using Malinowski's Trobriand material and taking a lead from Cicero's De oratore, it is argued that spatial location functions (1) as a mnemonic device for the recall of a corpus of myth, (2) as a structural marker dividing a corpus into separate thinkable units, and (3) as a means of restricting social change at least temporarily to specific institutions. Malinowski's instrumental theory of myth is contrasted with the cognitive theory advanced by LéviStrauss, and certain didactic functions of myth are also discussed . [myth, memory, oral tradition, social space, Trobriands]