Genetic variation in Bougainville and Solomon Islands populations

This paper reports the findings of genetic variation in eight populations of the Solomon Islands. Blood specimens collected from 345 Aita, 191 Nasioi and 416 Nagovisi of Bougainville, 379 Lau, 453 Baegu and 385 Kwaio of Malaita, and 504 Ontong Java, and 328 Ulawa subjects were tested for A-B-O, M-N-S-s, Rh, Hp, Tf, secretor, and red-cell acid phosphatase systems. Considerable differences were found among the eight populations with respect to all polymorphic systems studied. It was not possible to distinguish Austronesian groups from non-Austronesian groups on the basis of gene frequencies.     

A cautionary tale on ancient migration detection: mitochondrial DNA variation in Santa Cruz Islands,Solomon Islands

Over the past decade, the origin of the first Malayo-Polynesian settlers of the island Pacific has become a contentious issue in molecular anthropology as well as in archaeology and historical linguistics. Whether the descendants of the ancestral Malayo-Polynesian speakers moved rapidly through Indonesia and Island Melanesia in a few hundred years, or whether they were the product of considerable intermingling within the more westerly part of the latter region, it is widely accepted that they were the first humans to colonize the distant Pacific islands beyond the central Solomon Islands approximately 3,000 years ago. The Santa Cruz Islands in the Eastern Solomons would have most likely been the first in Remote Oceania to be colonized by them. Archaeologically, the first Oceanic Austronesian settlement of this region appears to have been overlain by various later influences from groups farther west in a complex manner. Molecular anthropologists have tended to equate the spread of various Austronesian-speaking groups with a particular mitochondrial variant (a 9-base-pair [bp] deletion with specific D-loop variants). We have shown before that this is an oversimplified picture, and assumed that the Santa Cruz situation, with its series of intrusions, would be informative as to the power of mitochondrial DNA haplotype interpretations. In the Santa Cruz Islands, the 9-bp deletion is associated with a small number of very closely related hypervariable D-loop haplotypes resulting in a star-shaped Bandelt median network, suggesting a recent population expansion. This network is similar to Polynesian median networks. In a pairwise mismatch comparison, the Santa Cruz haplotypes have a bimodal distribution, with the first cluster being composed almost entirely of the 9-bp-deleted haplotypes-again attesting to their recent origins. Conversely, the nondeleted haplogroups bear signatures of more ancient origins within the general region. Therefore, while the profiles of the two sets of haplotypes indicate very distinctive origins in different populations with divergent expansion histories, the sequence of their introduction into the Santa Cruz Islands clearly does not follow simply.     

Unexpected NRY chromosome variation in Northern Island Melanesia

To investigate the paternal population history of populations in Northern Island Melanesia, 685 paternally unrelated males from 36 populations in this region and New Guinea were analyzed at 14 regionally informative binary markers and 7 short tandem repeat (STR) loci from the nonrecombining portion of the Y chromosome. Three newly defined binary markers (K6-P79, K7-P117, and M2-P87) aided in identifying considerable heterozygosity that would have otherwise gone undetected. Judging from their geographic distributions and network analyses of their associated STR profiles, 4 lineages appear to have developed in this region and to be of considerable age: K6-P79, K7-P117, M2-P87, and M2a-P22. The origins of K5-M230 and M-M4 are also confirmed as being located further west, probably in New Guinea. In the 25 adequately sampled populations, the number of different haplogroups ranged from 2 in the single most isolated group (the Aita of Bougainville), to 9, and measures of molecular diversity were generally not particularly low. The resulting pattern contradicts earlier findings that suggested far lower male-mediated diversity and gene exchange rates in the region. However, these earlier studies had not included the newly defined haplogroups. We could only identify a very weak signal of recent male Southeast Asian genetic influence (<10%), which was almost entirely restricted to Austronesian (Oceanic)-speaking groups. This contradicts earlier assumptions on the ancestral composition of these groups and requires a revision of hypotheses concerning the settlement of the islands of the central Pacific, which commenced from this region.     

Glavarioid fungi of the Solomon Islands

Twenty-five species in 13 genera are recorded. New taxa are Clavaria vermicularis Ft. var. latispora var. nov., Clavulinopsis brevipes Corner var. termitarii var. nov., C. fusispora Corner, C. solomonensis Corner, Physalacria solomonensis Corner, Pterula gordyus (Speg.) Corner var. macrospora var. nov., P. robusta Corner, Ramaria solomonensis Corner, R. zippelii (Lév.) Corner var. cristatospora var. nov. (also from Borneo), and Ramariopsis kunzei (Ft.) Donk var. megaspora var. nov. (also from Borneo and Tibet). The clavarioid flora is essentially Malaysian and pantropic.     

The Solomon Islands Project: an introduction

The twin themes of the Solomon Islands Biomedical Project remain 1) the remarkable genetic heterogeneity of the groups in the Solomons; and 2) the differential responses to these groups to rapid modernization/acculturation over the past two decades of this long term study. This introduction summarizes the historical and ethnic relationships of the survey groups, their established genetic distances and their rankings with regard to acculturation at the times of their first survey, and changes occurring up to 1985-86. Relevant features of diet, life style, and epidemiology are described.     

Becoming Sinless: Converting to Islam in the Christian Solomon Islands

ABSTRACT   Islam is beginning to have a significant presence in the predominantly Christian nation of Solomon Islands. A few well-educated Islanders were drawn to Islam's elegant monotheism and promise of unity in the 1980s and early 1990s, but numbers have grown significantly in the years following a violent civil conflict (1998–2003). Many of these new Muslim converts, especially those from the island of Malaita, seem preoccupied with the problem of sin and blame Christianity for destroying customary rules, especially those enforcing gender segregation. Echoing long-standing Malaitan critiques of Christian freedom, they say that Christians rely too heavily on God's grace and their own ability to resist temptation. Unlike Christianity and similar to the traditional religion of the islands, Islam provides clear moral rules for living. Seeking an escape from a cycle of sin and redemption, these ex-evangelical Christians now see in Islam the possibility of becoming sinless.     

Counting the Cost of Diabetes in the Solomon Islands and Nauru

Aim

To determine the costs associated with diabetes to governments, people with diabetes and their carers, and its impact on quality of life in two Pacific Island countries—the Solomon Islands and Nauru.

Materials and Methods

This cross-sectional cost of illness study was conducted on 330 people with type 2 diabetes (197 from the Solomon Islands and 133 from Nauru) using a structured cost of illness survey questionnaire adapted from the Australian DiabCo$t study. Quality of life was measured by the EQ-5D Visual Analogue Scale.

Results

There were 330 respondents (50% female; mean duration of diabetes 10.9 years; mean age 52.6 years). The estimated annual national cost of diabetes incurred by the Solomon Islands government was AUD12.8 million (AUD281 per person/year) and by Nauru government was AUD1.2 million (AUD747 per person/year). The major contribution to the government costs was inpatient services cost (71% in the Solomon Islands and 83% in Nauru). Annual expenditure for diabetes was approximately 20% of the governments’ annual health care expenditure. Considerable absenteeism and retirement from work due to diabetes was found.

Conclusions

This study found substantial public and personal costs associated with diabetes. The findings provide objective data on which health policy, funding and planning decisions about the prevention and control of diabetes in the Solomon Islands and Nauru can be reliably based and subsequently evaluated.     

Dicyrtotnina and Ptenothrix (Insecta:Collembola) of the Solomon Islands

This paper deals primarily with the collembolan species of the subfamily Dicyrtominae collected during the Royal Society Expedition to the Solomon Islands of 1965 by P. N. Lawrence, supplemented by material from these islands collected by Dr and Mrs P. J. M. Greenslade, all of which is in the British Museum (Natural History). Additional supporting material described here has been derived from the Noona Dan Expedition of the Zoological Museum, Copenhagen and from the Bernice P. Bishop Museum, Hawaii. I should like to express my thanks to the individuals and Museum sconcerned.     

A Polynesian motif on the Y chromosome: population structure in remote Oceania

The Polynesian motif, a mitochondrial DNA marker of ancestral Polynesian communities, has filled a critical role in reconstructions of remote Oceanic history. Although the motif provides an effective narrative for Polynesian females, no equivalent male history is available from paternal lineages. Here, we describe a Y-chromosome binary polymorphism with absolute Polynesian affinity. We illustrate its unique spatial and temporal connections to early Polynesian communities, and through an analysis of associated short tandem repeat variation, we describe the first clear genealogic structure within Polynesia. Unlike the eastern and western regions advocated by archeology, we identify a tripartite structure comprising interaction spheres in the west (Tonga and Samoa), center (Tahiti), and east (Rapanui/Easter Island). Such patterning, a product of early regional contact and subsequent isolation, signals the conflicting roles of mobility and seclusion in Polynesian prehistory.     

Marine protected areas and resilience to sedimentation in the Solomon Islands

The ability of marine protected areas (MPAs) to provide protection from indirect stressors, via increased resilience afforded by decreased impact from direct stressors, remains an important and unresolved question about the role MPAs can play in broader conservation and resource management goals. Over a five-year period, we evaluated coral and fish community responses inside and outside three MPAs within the Roviana Lagoon system in Solomon Islands, where sedimentation pressure from upland logging is substantial. We found little evidence that MPAs decrease impact or improve conditions and instead found some potential declines in fish abundance. We also documented modest to high levels of poaching during this period. Where compliance with management is poor, and indirect stressors play a dominant role in determining ecosystem condition, as appears to be the case in Roviana Lagoon, MPAs may provide little management benefit.     

Human ecology in the Solomon Islands: Biomedical observations among four tribal societies

Data are presented from the first four groups studied in a longrange investigation of human ecology in the Solomon Islands. The groups varied in habitat, way of life, genetic background, and exposure to Western influence. Coverage of residents in designated hamlets was 78% for Kwaio, Malaita Island; 91% for Nasioi, Bougainville Island; and over 95% for both Lau and Baegu of Malaita. In all, 1626 persons were studied: 256 Nasioi, 443 Kwaio, 442 Lau, and 485 Baegu. All four groups were demographically “young,” with a high ratio of persons under 15 to those over 45 years of age, but a significant proportion lived to old age. Nutrition was adequate, though low in protein and fat. They had very little color-blindness and virtually no myopia, astigmatism, glaucoma, or hypertensive and coronary heart disease. Malaria, trachoma, and intestinal parasitism reflected differences in habitat and ways of life, but tuberculosis did not. Despite a density as high as that recorded for any human population, the Lau, living on small artificial islets in a saltwater lagoon, enjoyed robust health.     

The distribution of some insects of the Solomon Islands

Among the Solomon Islands' insects two distribution patterns are important, a distinctive fauna on S. Cristoval, and a similarity between the islsnds of Bougainville, Choiseul and S. Ysabel. These result from the island area-fauna size relation, and the expansion of immigrants or island endemics which takes place most easily across the narrower water gaps, although different insects vary in their ability to cross them. The distributions of species in three heteropteran genera are interpreted as stages in a process of expansion, differentiation and replacement. Peculiarities of the S. Cristoval fauna are related to the island's isolation in terms of distance from major sources, rather than any conjectural geological history. However the Bougainville-S. Ysabel affinity coincides with a possible late Pleistocene land connexion.     

New Delias butterflies from the Solomon Islands (Lepidoptera: Pieridae)

Abstract Four new taxa of Delias from the Solomon Islands are described. Two are races of a new species, D-messalina sp.n., which may be closely related to D.nigrina Fabricius and is distributed over three islands. The nominotypical subspecies, D.m.messalina subsp.n., occurs in Bougainville while D.m.orientalis subsp.n. is found on Santa Ysabel and Guadalcanal. The other two, D.alberti guava subsp.n. from Bougainville and D.alberti tetamba subsp.n. from Santa Ysabel, represent new subspecies of D.alberti Rothschld. Couplets for the inclusion of the new taxa in the standard key in Talbot are provided. In addition, a list of Solomon Islands Delias is given, together with brief distributional data.     

Custom Umbrellas (Poro) fromPandanus in Solomon Islands

The leaves ofPandanus dubius andP. solomonensis serve as a primary protective cover from the tropical sun and torrential rain in the Solomon Islands. A study of the process of manufacture and the present use was undertaken in 2 distinct geographical and linguistic areas of Guadalcanal to determine what features have enabled this traditional craft to survive relatively unaffected by over 100 yr of European contact. The traditional method of preparation and manufacture is described for the ethnobotanical record.