Relevant bibliographies by topics / Tonga Islands

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Tonga Islands'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Tonga Islands.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Tonga Islands"

1

L. Burns, Emma, Brian H. Costello, and Bronwyn A. Houlden. "Three evolutionarily significant units for conservation in the iguanid genus Brachylophus." Pacific Conservation Biology 12, no. 1 (2006): 64. http://dx.doi.org/10.1071/pc060064.

Full text
Abstract:
We examined phylogenetic relationships within the genus Brachylophus, which comprises two endangered iguana species endemic to the South Pacific islands of Fiji and Tonga. Genetic variation among Fijian Crested Iguanas B. vitiensis and Fijian and Tongan Banded Iguanas B. fasciatus was analysed using mitochondrial DNA (mtDNA) cytochrome b (cyt b) characterized from 35 individuals from island populations. Three distinct clades of Brachylophus were identified. The most divergent clade comprised B. fasciatus from Tonga, which supports the recognition of Tongan iguanas as a separate species. Molecular clock estimates suggested that the average sequence divergence (6.4%) between Tongan and Fijian B. fasciatus clades equated to 7 - 15.8 MY of separation, confirming that extant Brachylophus species have a long history of evolution in situ in the Fijian and Tongan archipelago. Phylogenetic analyses also revealed that Fijian B. fasciatus and B. vitiensis iguana populations were not reciprocally monophyletic. One clade comprised two mtDNA haplotypes from the Fijian islands of Monu, Monuriki, Devuilau, Waya and Yadua Taba. The other clade comprised B. fasciatus haplotypes from Kadavu and Gau, which was divergent from both the aforementioned Fijian clade (dA = 3.5%), and the Tongan clade (dA = 6.4%). In addition to mtDNA data, variation was assessed at microsatellite loci, and significant differentiation between iguana populations was detected. Based on both mtDNA and microsatellite analysis, the conservation priorities for these endangered lizards must be reassessed to protect iguanas as three distinct evolutionarily significant units.
APA, Harvard, Vancouver, ISO, and other styles
2

Kalavite, Telesia. "Tongan translation realities across Tā ('Time') and Vā ('Space')." Journal of New Zealand & Pacific Studies 7, no. 2 (October 1, 2019): 173–83. http://dx.doi.org/10.1386/nzps_00004_1.

Full text
Abstract:
Abstract The kingdom of Tonga known as the Friendly Islands is a bilingual country where the official languages are Tongan (lea faka-Tonga) and English (lea faka-Pilitānia). In a bilingual environment like Tonga, the ability to translate effectively between the two languages is a fundamental skill to communicate well and to achieve academic success. The main focus of this article is to approach translation through a sociocultural lens, and more specifically, through a Tongan-inspired tāvāist perspective: 'Okusitino's Māhina's Tā‐Vā ('Time‐Space') Theory of Reality. This theory has influenced a range of practices from many disciplines and social activities, such as translation. Theorizing translation in and across Tā ('time') and Vā ('space') informs the relationships between languages, cultures and educational backgrounds in the transmission of 'ilo ('knowledge') and poto ('skills') among all members of the society. In exploring the theory this article will consider two translation case studies of English to Tongan literature: Lewis Carroll's Alice in Wonderland (1865) and Antoine de Saint-Exupéry's The Little Prince (1943).
APA, Harvard, Vancouver, ISO, and other styles
3

Rinke, Dieter. "The status of wildlife in Tonga." Oryx 20, no. 3 (July 1986): 146–51. http://dx.doi.org/10.1017/s0030605300019980.

Full text
Abstract:
When the author visited ’Eua in the Tonga islands to study the red shining parrot, he took the opportunity to collect information on some other aspects of Tonga's wildlife. During his 18-month survey he also visited several other islands in the group. Here he discusses six rare and threatened animals—four birds and two reptiles.
APA, Harvard, Vancouver, ISO, and other styles
4

Pohiva, S. ‘Akilisi. "Media, justice in Tonga." Pacific Journalism Review : Te Koakoa 8, no. 1 (June 1, 2002): 96–104. http://dx.doi.org/10.24135/pjr.v8i1.733.

Full text
Abstract:
It is to my belief that such a move to form a new media association of the nature of the Pacific Islands Media Association (PIMA) is spear-headed by a group of people who have a common interest and common understanding, and a vision for the future role of media in the region.
APA, Harvard, Vancouver, ISO, and other styles
5

W. Steadman, David, Janet Franklin, Donald R. Drake, Holly B. Freifeld, Leslie A. Bolick, Darren S. Smith, and Timothy J. Motley. "Conservation status of forests and vertebrate communities in the Vava`u Island Group, Tonga." Pacific Conservation Biology 5, no. 3 (1999): 191. http://dx.doi.org/10.1071/pc990191.

Full text
Abstract:
Based on field work in 1995 and 1996, we assess the distribution, relative abundance, and habitat preferences of forest plants, lizards, birds, and mammals on 17 islands in the Vava'u Group, Kingdom of Tonga. The islands vary in habitat composition, land area (0.02-96 km2), elevation (20-215 m), and distance (0-10.1 km) from the largest island of 'Uta Vava'u. Two major forest types are recognized - coastal and lowland. They are similar in composition to forest communities described for the southern Tongan island group and for lowland Samoa, but with unique patterns of species dominance. The most mature category of lowland forest persists mainly in areas too steep for cultivation and covers about 10% of the land area. The greatest variation in plant species composition appears to be related to the degree of human disturbance. Among lizards, six species are widespread and at least locally common, whereas three others are localized and typically rare. Among landbirds, 11 species are widespread and at least locally common, one (West Polynesian Ground-Dove Gallicolumba stain) is extremely rare, and three others have been extirpated in the past century. The overall species richness and relative abundance of indigenous plants and vertebrates among islands in Vava'u have been affected more by deforestation and other human activities than by the classic physical variables of island biogeography - area, elevation, or isolation. Small islands (<1 km2) may be very important for conservation purposes, especially given the propensity for secondary succession to indigenous forests following agricultural abandonment.
APA, Harvard, Vancouver, ISO, and other styles
6

Hooker, Brian. "The European Discovery of the Tonga Islands." Terrae Incognitae 36, no. 1 (June 2004): 20–27. http://dx.doi.org/10.1179/tin.2004.36.1.20.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

STEADMAN, DAVID W., and OONA M. TAKANO. "A new genus and species of pigeon (Aves, Columbidae) from the Kingdom of Tonga, with an evaluation of hindlimb osteology of columbids from Oceania." Zootaxa 4810, no. 3 (July 13, 2020): 401–20. http://dx.doi.org/10.11646/zootaxa.4810.3.1.

Full text
Abstract:
The region from New Guinea through Oceania sustains the world’s most diverse set of columbids. We describe osteological characters of the hindlimb (femur, tibiotarsus, tarsometatarsus) that divide the Papuan-Oceanic pigeons and doves into three groups based on functional morphology: “arboreal” (Hemiphaga, Ducula, Ptilinopus, Drepanoptila, Gymnophaps), “intermediate” (Columba, Macropygia, Reinwardtoena), and “terrestrial” (Gallicolumba [includes Alopecoenas], Trugon, Microgoura, Goura, Chalcophaps, Geopelia, Henicophaps, Caloenas, Didunculus, Otidiphaps). The arboreal and terrestrial groups are each distinctive osteologically, especially in the tibiotarsus and tarsometatarsus, which are short relative to the femur in the arboreal group, and long relative to the femur in the terrestrial group. The intermediate pigeons are more similar to arboreal than to terrestrial pigeons, but nonetheless fit in neither group. To estimate the phylogenetic relationships among or within these three groups is somewhat tentative using hindlimb osteology alone, although all five genera of arboreal pigeons have independent molecular evidence of relatedness, as do most of the genera of terrestrial pigeons. Using the hindlimb and other osteological data as a framework, we describe a new extinct genus and species of pigeon, Tongoenas burleyi, from Holocene archaeological and Pleistocene paleontological sites on six islands (Foa, Lifuka, `Uiha, Ha`afeva, Tongatapu, and `Eua) in the Kingdom of Tonga. Tongoenas was a large-sized member of the “arboreal” pigeon group, with osteological characters that relate it to Ducula, Gymnophaps, and Hemiphaga (generally canopy frugivores) rather than with the “terrestrial” pigeons (more ground-dwelling and granivorous) such as Gallicolumba, Trugon, Microgoura, Goura, etc. (others listed above). Among volant columbids, living or extinct, only the species of Goura (from New Guinea) are larger than Tongoenas. From most of the same prehistoric sites, we also report new material of the nearly as large, extinct pigeon Ducula shutleri Worthy & Burley, recently described from islands in the Vava`u Group of Tonga. Thus, D. shutleri also was widespread in Tonga before human impact. The prehistoric anthropogenic loss in Tonga of Tongoenas burleyi, Ducula shutleri, and other columbids undoubtedly had a negative impact on the dispersal regimes of Tongan forest trees. At first human contact about 2850 years ago, at least nine species of columbids in six genera inhabited the Tongan islands, where only four species in three genera exist today.
APA, Harvard, Vancouver, ISO, and other styles
8

Underhill, Steven J. R., Soane Patolo, Yuchan Zhou, and Sarah Burkhart. "The Agriculture–Nutrition–Income Nexus in Tonga: Is Postharvest Loss Undermining Horticulture Market Efficiency in Tonga?" Horticulturae 6, no. 4 (October 1, 2020): 61. http://dx.doi.org/10.3390/horticulturae6040061.

Full text
Abstract:
The Kingdom of Tonga has one of the highest rates of diet-related non-communicable diseases (NCDs) in the world. Initiatives to promote pro-health dietary behaviour are possibly being compromised by poor or inconsistent consumer accessibility to affordable and safe fresh fruits and vegetables, referred to as the agriculture–nutrition–income nexus. While donors increasingly focus on nutrition-sensitive agriculture across the Pacific, there is little contemporary information concerning Tonga’s domestic horticultural distribution and market system, particularly in regards to food loss. This study surveyed 292 municipal and road-side vendors on Tongatapu and ‘Utu Vava’u Islands, with the aim of mapping and analyzing horticultural markets and farm supply, transport logistics, and quantifying postharvest practice and market loss. Tonga’s domestic horticultural market structure consists of a central municipal market and on Tongatapu Island, a supplementary network of urban and rural based road-side vendors. There is limited inter-island trade, with most farms located within 25 km of the central municipal market. Mean postharvest horticultural loss was very low, at 1.4% to 5.3%, with road-side vendors more vulnerable to loss. This level of loss was thought to reflect short intra-island transport distance, the type of crops being traded, and rapid market throughput, rather than a level of value chain efficiency. Vendors regulated market supply volume and price discounting and were the principal strategies to mitigate postharvest loss. While low levels of postharvest loss, short transport logistics, and fast market throughput are consistent with a relatively efficient horticulture market system, vendor practice may be impeding fresh fruit and vegetable accessibility.
APA, Harvard, Vancouver, ISO, and other styles
9

White, Ian, Tony Falkland, and Taaniela Kula. "Meeting SDG6 in the Kingdom of Tonga: The Mismatch between National and Local Sustainable Development Planning for Water Supply." Hydrology 7, no. 4 (October 22, 2020): 81. http://dx.doi.org/10.3390/hydrology7040081.

Full text
Abstract:
UN Sustainable Development Goal 6 challenges small island developing states such as the Kingdom of Tonga, which relies on variable rainwater and fragile groundwater lenses for freshwater supply. Meeting water needs in dispersed small islands under changeable climate and frequent extreme events is difficult. Improved governance is central to better water management. Integrated national sustainable development plans have been promulgated as a necessary improvement, but their relevance to island countries has been questioned. Tonga’s national planning instrument is the Tonga Strategic Development Framework, 2015–2025 (TSDFII). Local Community Development Plans (CDPs), developed by rural villages throughout Tonga’s five Island Divisions, are also available. Analyses are presented of island water sources from available census and limited hydrological data, and of the water supply priorities in TSDFII and in 117 accessible village CDPs. Census and hydrological data showed large water supply differences between islands. Nationally, TDSFII did not identify water supply as a priority. In CDPs, 84% of villages across all Island Divisions ranked water supply as a priority. Reasons for the mismatch are advanced. It is recommended that improved governance in water in Pacific Island countries should build on available census and hydrological data and increased investment in local island planning processes.
APA, Harvard, Vancouver, ISO, and other styles
10

Taufa, Taitusi, Ramesh Subramani, Peter Northcote, and Robert Keyzers. "Natural Products from Tongan Marine Organisms." Molecules 26, no. 15 (July 27, 2021): 4534. http://dx.doi.org/10.3390/molecules26154534.

Full text
Abstract:
The islands of the South Pacific Ocean have been in the limelight for natural product biodiscovery, due to their unique and pristine tropical waters and environment. The Kingdom of Tonga is an archipelago in the central Indo-Pacific Ocean, consisting of 176 islands, 36 of which are inhabited, flourishing with a rich diversity of flora and fauna. Many unique natural products with interesting bioactivities have been reported from Indo-Pacific marine sponges and other invertebrate phyla; however, there have not been any reviews published to date specifically regarding natural products from Tongan marine organisms. This review covers both known and new/novel Marine Natural Products (MNPs) and their biological activities reported from organisms collected within Tongan territorial waters up to December 2020, and includes 109 MNPs in total, the majority from the phylum Porifera. The significant biological activity of these metabolites was dominated by cytotoxicity and, by reviewing these natural products, it is apparent that the bulk of the new and interesting biologically active compounds were from organisms collected from one particular island, emphasizing the geographic variability in the chemistry between these organisms collected at different locations.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Tonga Islands"

1

Phillips, David A. "Crustal motion studies in the Southwest Pacific: geodetic measurements of plate convergence in Tonga, Vanuatu and the Soloman Islands." Thesis, University of Hawaii at Manoa, 2003. http://hdl.handle.net/10125/6903.

Full text
Abstract:
The southwest Pacific is one of the most tectonically dynamic regions on Earth. This research focused on crustal motion studies in three regions of active Pacific-Australia plate convergence in the southwest Pacific: Tonga, the New Hebrides (Vanuatu) and the Solomons Islands. In Tonga, new and refined velocity estimates based on more than a decade of Global Positioning System (GPS) measurements and advanced analysis techniques are much more accurate than previously reported values. Convergence rates of 80 to 165 mm/yr at the Tonga trench represent the fastest plate motions observed on Earth. For the first time, rotation of the Fiji platform relative to the Australian plate is observed, and anomalous deformation of the Tonga ridge was also detected. In the New Hebrides, a combined GPS dataset with a total time series of more than ten years led to new and refined velocity estimates throughout the island arc. Impingement of large bathymetric features has led to arc fragmentation, and four distinct tectonic segments are identified. The central New Hebrides arc segment is being shoved eastward relative to the rest of the arc as convergence is partitioned between the forearc (Australian plate) and the backarc (North Fiji Basin) boundaries due to impingement of the d'Entrecasteaux Ridge and associated Bougainville seamount. The southern New Hebrides arc converges with the Australian plate more rapidly than predicted due to backarc extension. The first measurements of convergence in the northern and southernmost arc segments were also made. In the Solomon Islands, a four-year GPS time series was used to generate the first geodetic estimates of crustal velocity in the New Georgia Group, with 57-84 mm/yr of Australia-Solomon motion and 19-39 mm/yr of Pacific-Solomon motion being observed. These velocities are 20-40% lower than predicted Australia-Pacific velocities. Two-dimensional dislocation models suggest that most of this discrepancy can be attributed to locking of the San Cristobal trench and elastic strain accumulation in the forearc. Anomalous motion at Simbo island is also observed.
xv, 135 leaves
APA, Harvard, Vancouver, ISO, and other styles
2

Swan, Thomas. "Distribution, occurrence, and identification of mosquito species in the Tongatapu Island Group, Kingdom of Tonga." Thesis, University of Canterbury. Waterways Centre for Freshwater Management, 2015. http://hdl.handle.net/10092/10928.

Full text
Abstract:
Mosquitoes pose a serious threat to the economy, health status, and biosecurity of countries around the world. Mosquitoes kill an average of 700,000 people per year. The global expansion of air, sea, and land transport networks has greatly enhanced the spread of mosquitoes internationally. In the Pacific, the number of mosquito-borne diseases occurring has been on the rise in recent years, possibly as a result of human-mediated dispersal of larvae and adult mosquitoes. The Kingdom of Tonga has had numerous outbreaks of dengue fever and chikungunya virus in recent years. Previous research has catalogued species occurrences and distributions throughout Tonga. However, it is unknown whether new species have arrived in Tonga, and if distribution of previously found species has changed since the last comprehensive survey in 2006. Present research aims to update the literature by conducting a mosquito survey at 84 sites across the four islands of Tongatapu, Pangaimotu, ‘Oneata, and ‘Eua to record the distribution and occurrence of mosquito larvae. Nine mosquito species were collected: Aedes aegypti Linnaeus, A. albopictus Skuse, A. tongae Edwards, A. horrescens Edwards, A. vexans nocturnus Theobold, Culex annulirostris Skuse, C. albinervis Edwards, C. quinquefasciatus Say and C. sitiens Wiedemann. The collection of A. albopictus is the second time that this species has been recorded in Tonga. Moreover, the spatial extent of this species throughout Tonga was far greater than previously recorded. A major outcome of this survey has been the creation of an identification key for the mosquito larvae species of Tonga. This key should increase the accuracy of positive mosquito larvae identifications in Tonga. Mosquitoes were more frequently collected in artificial (e.g., used car tyres, fuel drums, containers) than natural (e.g., pools, ponds, tree holes) habitats. Car tyres, water containers, fuel drums, fridges, washing machines, and ponds were the most common habitats in which mosquito larvae were found. Aedes aegypti, A. albopictus, and C. quinquefasciatus were the three most common mosquito species collected, whereas A. tongae, A. horrescens, A. vexans nocturnus, C. annulirostris, C. sitiens, and C. albinervis were less frequently found. Multiple logistic regression analyses indicated that habitat volume had a significant positive effect on the presence of A. albopictus and A. tongae, whereas conductivity had a significant positive effect on the presence of C. annulirostris. Additionally, the volume by temperature interaction was a significant predictor of species presence for A. aegypti, A. albopictus, and C. annulirostris (as habitat volume increases, the effect of temperature went from neutral to negative). This suggests that larger, cooler habitats favour colonisation by these species. The number of artificial habitats (particularly used car tyres) present may have significantly increased since previous studies. Management should therefore focus on implementing community-run mosquito projects aimed at reducing the number of artificial habitats capable of being colonised by mosquito larvae. Covering, tipping out water, and infilling these habitats with soil to prevent mosquito oviposition is a pragmatic and straightforward mosquito control solution. This should immensely reduce the abundance of mosquitoes and may prevent disease outbreak in Tonga.
APA, Harvard, Vancouver, ISO, and other styles
3

Fifita, Viliami Konifelenisi. "Child and adult poverty in a small island developing state : a case study of Tonga." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.723436.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Prescott, Semisi Manisela. "Pacific business sustainability in New Zealand a study of Tongan experiences : a thesis submitted to Auckland University of Technology in fulfilment of the requirements for the degree of Doctor of Philosophy (PhD), 2009 /." Click here to access this resource online, 2009. http://hdl.handle.net/10292/745.

Full text
Abstract:
Pacific business sustainability in New Zealand is important for the economic and social wellbeing of the Pacific Island people who have chosen New Zealand as their home. As with many ethnic minorities businesses overseas, Pacific businesses struggle to survive in a foreign commercial environment that is often not aligned to the value systems and customs of their country of origin. This study seeks to determine the key financial and entrepreneurial drivers of business sustainability for Tongan businesses as a specific group within the Pacific Island business sector. The study takes an ethnic specific view of business sustainability drawing on the experiences of twenty Tongan businesses, three Pacific business consultants and the wider Tongan community. The data was captured in a series of talanoa sessions (a traditional and preferred form of communication based on face to face discussion) carried out in 2006 and 2007. Throughout the study, attention was given to Tongan protocols, cultural nuances and sensitivities to ensure the context in which these Tongan businesses operate was captured. The study concludes by making several contributions to the literature. The first includes the contribution to methodology through to use of talanoa in a business context. The second is the contribution to embeddedness theory through the analysis of specific Tongan business experiences and lastly the empirical contribution to the Pacific Island business literature. The findings have been analysed from a number of perspectives including; financial accounting, business finance, management accounting and business related challenges. The empirical findings highlight that differences in culture and traditional Tongan protocols influence business practice. The impact of Tongan culture on business sustainability is both complementary and inimical. Tongan business sustainability in New Zealand is therefore a product of business practices that incorporate embedded Tongan culture and the western commercial paradigms within which they operate.
APA, Harvard, Vancouver, ISO, and other styles
5

Adjei-Poku, Gladys. "Lived Experience of Tongans with Obesity and Diabetes." ScholarWorks, 2019. https://scholarworks.waldenu.edu/dissertations/6959.

Full text
Abstract:
People of Pacific Island descent are afflicted by obesity and diabetes more than other populations. Although interventions have succeeded in reducing these conditions among other groups, they have been unsuccessful among Tongans and other Pacific Islanders. Furthermore, little is known about the cultural perspectives of this population with a high rate of obesity and diabetes. Accordingly, this descriptive phenomenological study was conducted to investigate the lived experiences of Tongans with obesity and diabetes in a western metropolitan area of the United States to understand their predisposition toward these conditions and suggest appropriate interventions. Purposive sampling was used to recruit 11 Tongans, 18 years or older, with obesity and diabetes. Face-to-face interviews were conducted using open-ended questions. Data analysis consisted of verbatim transcription and splitter coding, which identified 5 emerging themes. The findings indicated that cultural customs have created an emotional attachment among Tongan participants to their native foods and that they feel obliged to eat abundantly at food-related social events. Moreover, they mistrust their healthcare professionals, which results in non-adherence to medical advice. The findings align with Martha Rogers' theory of the science of unitary human beings and Bandura's model of reciprocal determinism that there is a strong relationship between people and their cultural environment. This study's findings provide an understanding that may lead to positive social change in designing culturally specific preventive programs to decrease obesity and diabetes and ensure a better quality of life for Tongans.
APA, Harvard, Vancouver, ISO, and other styles
6

Sone, Tamara Leigh. "Network of islands : historical linkages among the islands of Fiji, Tonga and Samoa." Thesis, 2006. http://hdl.handle.net/1828/2333.

Full text
Abstract:
This study presents an analysis of the interactions observed among the West Polynesia islands of Fiji, Tonga and Samoa, using concepts of regional systems and trade networks. The connections between these island groups in the period between the 1770s and the 1870s are examined in extensive detail. In particular, this analysis takes the theoretical framework of the world-systems approach of Chase-Dunn and Hall and applies a method involving networks of exchange to this region. These networks include the information network, the bulk products network, the political/ military network and the network of prestige valuables. Archival data show the operation and content of these networks and demonstrate that with the influx of European products in the early colonial period, there was an efflorescence of long-distance exchange in this region. This analysis of networks linking the island groups suggest that Fiji, Tonga and Samoa should be viewed as a regional unit instead of three distinct societies for many subjects of investigation.
APA, Harvard, Vancouver, ISO, and other styles
7

Phillips, David A. "Crustal motion studies in the southwest Pacific geodetic measurements of plate convergence in Tonga, Vanuatu and the Solomon Islands /." 2003. http://proquest.umi.com/pqdweb?index=0&did=765084701&SrchMode=1&sid=1&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1233364545&clientId=23440.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ostraff, Melinda. "Contemporary uses of Limu (marine algae) in the Vava'u Island group, Kingdom of Tonga : an ethnobotanical study." 2003. http://hdl.handle.net/1828/343.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Kelman, Melanie C. "Hydrothermal alteration of a supra-subduction zone ophiolite analog, Tonga, Southwest Pacific." Thesis, 1998. http://hdl.handle.net/1957/33614.

Full text
Abstract:
The basement of the Tonga intraoceanic forearc comprises Eocene arc volcanic crust formed during the earliest phases of subduction. Volcanic rocks recovered from the forearc include boninites and arc tholeiites, apparently erupted into and upon older mid-oceanic ridge tholeiites. Rock assemblages suggest that the forearc basement is a likely analog for large supra-subduction zone (SSZ) ophiolites not only in structure and Ethology, but also in the style of hydrothermal alteration. Dredged volcanic samples from the central Tonga forearc (20-24�� S) exhibit the effects of seafloor weathering, low (<200��C, principally <100��C) alteration, and high temperature (>200��C) alteration. Tholeiites and arc tholeiites are significantly more altered than boninites. Seafloor weathering is due to extensive interaction with cold oxidizing seawater, and is characterized by red-brown staining and the presence of Fe-oxyhydroxides. Low temperature alteration is due to circulation of evolving seawater-derived fluids through the volcanic section until fluid pathways were closed by secondary mineral precipitation. Low temperature alteration is characterized by smectites, celadonite, phillipsite, mixed-layer smectite/chlorite, carbonates, and silica. All phases fill veins and cavities; clay minerals and silica also replace the mesostasis and groundmass phases. Low temperature alteration enriches the bulk rock in K, Ba, and Na, and mobilizes other elements to varying extents. The few high temperature samples are characterized by mobilizes other elements to varying extents. The few high temperature samples are characterized by epidote, chlorite, quartz, oxides, and fibrous amphibole, which replace groundmass and phenocrysts, and fill cavities, and are presumed to have originated in zones of concentrated hydrothermal upflow.These three alteration types are similar to those seen in many ophiolites such as Troodos, where low temperatures prevailed in the volcanic section except in localized upflow zones. Alteration mineral chemistries are also broadly similar to those observed for the Troodos Ophiolite. Tonga forearc alteration differs from mid-oceanic ridge alteration in the presence of Al-rich dioctahedral smectites (not common in mid-oceanic ridge crust), the high Al content of saponite, and the predominance of K as an interlayer cation in clays. Hydrothermal alteration of the Tonga forearc is likely the product of extensive interaction with compositionally evolving seawater-derived fluids beginning at the time of emplacement. The distribution and intensity of alteration in these crustal sections depend principally on the porosity and permeability of the crust during alteration, which are influenced by the primary porosity, igneous morphology, and the presence of faults and fractures which could affect fluid flow.
Graduation date: 1999
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Tonga Islands"

1

Australia. National Office of Overseas Skills Recognition. Pacific Islands I: Solomon Islands, Tonga : a comparative study. Canberra: Australian Government Publishing Service, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Churchward, C. Maxwell. Tongan grammar. Tonga: Vava'u Press, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Thomas, Schneider. Functional Tongan-English, English-Tongan dictionary. 2nd ed. Burwood, Vic: Dellasta, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Carpenter, Kenneth D. Pacific Islands: Niue, Tonga, Kiribati, Fiji, Papua New Guinea. Washington, DC: American Association of Collegiate Registrars and Admissions Officers, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Shumway, Eric B. Intensive course in Tongan: With numerous supplementary materials, grammatical notes, and glossary. Laie, Hawaii: Institute for Polynesian Studies, Brigham Young University-Hawaii, 1988.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Prasad, Satendra. Industrial relations in the South Pacific: Samoa, Tonga, the Cook Islands, Kiribati, Solomon Islands, Vanuatu, and Fiji Islands. [Suva,Fiji]: Dept. of Sociology, School of Economic Development, University of the South Pacific, 2001.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Goodwin, Bill. Frommer's South Pacific: Including Fiji, Tahiti, Samoa, Tonga & the Cook Islands. 6th ed. New York: Macmillan USA, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Hughes, H. G. A. Chronology of education in Fiji, Gilbert and Ellice Islands, and Tonga. Afonwen [Mold, Clwyd]: Gwasg Gwenffrwd, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Prasad, Satendra. Employment and industrial relations in the South Pacific: Samoa, Tonga, the Cook Islands, Kiribati, Solomon Islands, Vanuatu and Fiji Islands. Sydney, N.S.W: McGraw-Hill, 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Houston, D. M. Rat eradication on small islands in the Vavaʼu Group, Kingdom of Tonga. [S.l: s.n., 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Tonga Islands"

1

Havealeta, Mele, Fusi Kaho, and Amelia Afuha’amango Tuipulotu. "Tonga: Cyclone Ian, Ha’apai Islands." In The Role of Nurses in Disaster Management in Asia Pacific, 105–9. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-41309-9_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Gangopadhyay, Partha, and Khushbu Rai. "Overseas Development Assistance and Climate Resilience: A Case Study of Tonga." In Shaping the Future of Small Islands, 283–300. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4883-3_16.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Beyerl, Katharina, Harald A. Mieg, and Eberhard Weber. "Comparing perceptions of climate-related environmental changes for Tuvalu, Samoa, and Tonga." In Dealing with climate change on small islands: Towards effective and sustainable adaptation, 143–74. Göttingen: Göttingen University Press, 2019. http://dx.doi.org/10.17875/gup2019-1215.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Tupou, Mele, and Sue Farran. "Adoption in Tonga." In The Plural Practice of Adoption in Pacific Island States, 129–45. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95077-8_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Moengangongo, Tevita H. "15. Agricultural Mechanisation: Tractors and Technology Choice in Tonga." In Island Technology, 157–64. Rugby, Warwickshire, United Kingdom: Practical Action Publishing, 1994. http://dx.doi.org/10.3362/9781780445212.015.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Karig, Daniel E. "Ridges and Basins of the Tonga-Kermadec Island Arc System." In Collected Reprint Series, 239–54. Washington, DC: American Geophysical Union, 2014. http://dx.doi.org/10.1002/9781118782149.ch12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Malm, Thomas. "The Catch of Maui: Coral Gardens in the Past and Present of the Tongan Islands." In Ethnobiology of Corals and Coral Reefs, 133–55. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-23763-3_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Foley, Aideen. "The Impact of Connectivity on Information Channel Use in Tonga During Cyclone Gita: Challenges and Opportunities for Disaster Risk Reduction in Island Peripheries." In Climate Change Management, 255–71. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-40552-6_13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Dam, Hans G., William T. Peterson, and Diane C. Bellantoni. "Seasonal feeding and fecundity of the calanoid copepod Acartia tonsa in Long Island Sound: is omnivory important to egg production?" In Ecology and Morphology of Copepods, 191–99. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-1347-4_26.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

"Tonga." In The Pacific Islands, 56–57. University of Hawaii Press, 1989. http://dx.doi.org/10.1515/9780824843892-019.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Tonga Islands"

1

Court, Kenneth E. "Extended Cruising The Second Time Around." In SNAME 7th Chesapeake Sailing Yacht Symposium. SNAME, 1985. http://dx.doi.org/10.5957/csys-1985-005.

Full text
Abstract:
Some years ago, in 1975, I presented a paper and a slide show at an earlier sailing yacht symposium in Annapolis. The subject was a four-year, 28,000 mile cruise I had made in the years 1965 - 1968 most of the way around the world: Hawaii and the South Pacific, New Zealand, Australia's Barrier Reef, the Indian Ocean, the Red Sea, the Mediterranean, including the Greek Islands, an Atlantic crossing to Barbados from the Canary Islands, the Caribbean, and home to the Chesapeake. The paper I wrote then was entitled "Extended Cruising: An Overview" and contained sketches and data from my logs. It was same 55 pages long and talked about many facets of cruising from my vantage point, primarily as seen from the decks of Mamari, the 28 foot ketch I had bought in New Zealand. Lest Mamari 's size appear too small, which perhaps would make me seen heroic, recognize that in displacement and accomodations Mamari was the equivalent of a 33 foot boat. To dispel one other misconception, be advised that I normally sailed with a crew of two, sometimes more, and only sailed two legs single-handed, of about 500 miles each, one from Tonga to Fiji in the Pacific, the other in the Gulf of Suez and from Port Said to the Greek Islands. The 1975 paper reflected my background as a naval architect, combined with my experience as a sailor. I told of things I learned from others. I analyzed log data, presented photographs, drawings and tables, and wrote a series of "yarns" such as sailors spin about their travels. The paper is touched with a flavor of the sea, a flavor of talk over run or coffee in a snug anchorage or on a shared night watch. That 1975 paper makes good reading, and much of the information is still valid. It could be reprinted and if there is enough interest l will do so (contact me). This present paper is a brief look at my experiences on a series of sailing trips, but in particular a one year voyage in a 37 foot yawl from Turkey to the Chesapeake via the West Indies in 1980-81. The paper answers the question posed at the 1975 symposium, would I do the trip again? Then, I thought so, but could not be sure, now my reply is, "of course."
APA, Harvard, Vancouver, ISO, and other styles
2

Swan, Tom. "Mosquito surveillance in the Tongatapu Island Group, Kingdom of Tonga." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.112614.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Xueshu Cao, Andrew Lapthorn, and Abdolrahman Peimankar. "An isolated hybrid renewable energy system: Ha'apai island group in the Kingdom of Tonga." In 2014 International Conference on Power Engineering and Renewable Energy (ICPERE). IEEE, 2014. http://dx.doi.org/10.1109/icpere.2014.7067240.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Chao Gao and Chuanhui Wang. "Study on channel islands in Ma-wu-tong Section of Yangtze River based on remote sensing image." In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE). IEEE, 2011. http://dx.doi.org/10.1109/rsete.2011.5965085.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Tonga Islands' for particular source types:
Journal articles Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography