Gotowe bibliografie tematyczne / Dugong

Gotowa bibliografia na temat „Dugong”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 30 lipca 2024

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Artykuły w czasopismach na temat "Dugong"

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SYAFUTRA, RANDI, WAHYU ADI, MUHAMMAD IQBAL i INDRA YUSTIAN. "Short Communication: Dugong dugon Müller, 1776 (Sirenia, Dugongidae) in Bangka Island, Indonesia". Biodiversitas Journal of Biological Diversity 19, nr 3 (1.05.2018): 823–30. http://dx.doi.org/10.13057/biodiv/d190310.

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Syafutra R, Adi W, Iqbal M, Yustian I. 2018. Short communication: Dugong dugon Müller, 1776 (Sirenia, Dugongidae) in Bangka Island, Indonesia. Biodiversitas 19: 823-830. Dugong dugon is a marine mammal species classified as Vulnerable. It has distribution in Indonesia, especially in Bangka Island. However, only four records of dugong were reported in Bangka Island in 1976, 2006, and 2007. In addition, there is little published information about local beliefs toward dugong and awareness actions toward dugong conservation in Bangka Island. This research compiled new records of dugong, local beliefs toward dugong, and awareness actions toward dugong conservation in Bangka Island. Sixteen new records of dugong were collected in Bangka Island leading to a total of 18 records for this island. All new records of dugong were obtained entirely from the eastern waters of Bangka Island. The new records also informed that most of the dugongs were found dead and entangled in gill nets. In addition, an interesting local belief caused Kurau Village becomes the most important location for fishermen to sell dead dugongs or dugongs’ meat. Furthermore, three main awareness actions toward dugong had been implemented in Bangka Island in 2017.
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Lanyon, JM, i H. Marsh. "Digesta Passage Times in the Dugong". Australian Journal of Zoology 43, nr 2 (1995): 119. http://dx.doi.org/10.1071/zo9950119.

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The retention times of particulate digesta were measured in two captive dugongs, Dugong dugon (Muller 1776) using inert plastic markers. The mouth-to-anus retention times (146-166 h) were similar to those of the West Indian manatee, and much longer than those of most other herbivorous mammals. This slow gut passage rate may be explained by the dugong's long digestive tract, the low fibre level of the diet and the low food intake. Like the manatee, the dugong appears to have a digestive strategy that is atypical of hindgut fermenters: low-fibre material is retained for extended periods within the long hindgut and almost completely digested.
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Cleguer, C., C. Garrigue i H. Marsh. "Dugong (Dugong dugon) movements and habitat use in a coral reef lagoonal ecosystem". Endangered Species Research 43 (24.09.2020): 167–81. http://dx.doi.org/10.3354/esr01061.

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Little is known about how the Vulnerable dugong Dugong dugon uses coral reef lagoons despite the importance of these habitats throughout much of its vast range. We used GPS satellite tracking systems to explore the space use of 12 dugongs at 3 locations in the coral reef lagoons of the main island of New Caledonia in the southwest Pacific: Cap Goulvain, Ouano and Nouméa. The movements of the tracked dugongs varied among individuals and all except one animal undertook large-scale movements (>15 km; mean [±SE] 37.7 ± 5.2 km) from their capture location (maximum waterway distance range: 13.8 to 72.9 km). The straight-line distances between the furthest GPS locations during each animal’s tracking period ranged from 21.3 to 74.5 km. We identified areas used intensively by dugongs in all 3 study areas, some of which were areas where seagrass presence has not been verified, or where dugongs have not been observed during past aerial surveys. Dugongs spent most of their tracking time within the lagoons, with 99.4% of GPS locations found inside the barrier reef. Nonetheless, where the lagoon was narrow and confined, 3 tracked dugongs used the fore reef shelf outside the barrier reef in the open ocean to commute between bays. Our findings can inform conservation and management initiatives in New Caledonia as well as other countries within the dugong’s range which have similar habitat geomorphology but where dugongs occur in numbers too low to be tracked and are considered Critically Endangered.
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Panyawai, Janmanee, i Anchana Prathep. "A Systematic Review of the Status, Knowledge, and Research Gaps of Dugong in Southeast Asia". Aquatic Mammals 48, nr 3 (15.05.2022): 203–22. http://dx.doi.org/10.1578/am.48.3.2022.203.

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The dugong (Dugong dugon; Müller, 1776) is a vulnerable marine mammal species. This systematic review aims to provide information about the remaining populations, distributions, and habitat sites of the dugong in Southeast Asia. By combining this information with scientific research, critical knowledge gaps about dugongs in this region can be filled. This review showed that dugong populations have not only been reduced but also scattered in coastal waters. Little information is available about the remaining population numbers and distributions of dugongs. The largest estimated populations were reported around East Malaysia (688 to 1,376 dugongs); North Sulawesi, Indonesia (1,000 dugongs); and in the Andaman Sea, Thailand (200 to 250 dugongs). Published research has been very limited—approximately two articles per year. From 1993 until 2021, articles about the dugong were published in the context of ecology, conservation, biology, socioecology, biochemistry, and physiology. Visual and aerial surveying and anecdotal information about sightings and strandings of dugongs were the typical methods of research in Southeast Asia. The conservation strategy in this region is still focused on specific subject areas. The knowledge base for the species is lacking detailed quantitative data on remaining dugong populations, movements, habitats, and mating periods. Behavioral information lacks data for both spatial and temporal variations in foraging behavior, for example. Elucidation is needed in several different aspects of seagrass ecosystem dynamics. Improvements in captive dugong husbandry are also needed to ensure the sustainable conservation of the dugong in the region. National and international management decisions must be based on solid scientific data and multisector integration.
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Andriansyah, Maulana. "Marine Conservation Analysis Of Dugong Life Habitat Ecosystem". JOURNAL OF OCEANOGRAPHY AND AQUATIC SCIENCE 1, nr 2 (30.05.2023): 37–41. http://dx.doi.org/10.56855/joane.v1i2.340.

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The dugong (Dugong dugon) is a large marine mammal belonging to the order Sirenia and is one of four living species of sea cows, along with the manatees. Dugongs are found throughout the Indo-Pacific region, inhabiting shallow coastal waters, estuaries, lagoons, and seagrass beds, making them highly dependent on seagrass ecosystems for their survival. The dugong is classified as vulnerable to extinction by the International Union for Conservation of Nature (IUCN), with population declines attributed to habitat loss, hunting, accidental capture, and climate change. Therefore, conservation efforts are essential to ensure the survival of the dugong and the maintenance of the ecological services provided by seagrass ecosystems. The current state of knowledge on dugongs and their conservation can be synthesized based on the findings of the ten selected references. Overall, these references provide evidence for the importance of seagrass meadows as habitat and food source for dugongs, as well as for the numerous threats facing this species. Overall, the reviewed literature underscores the importance of engaging local com-munities in dugong conservation efforts. Community-based conservation interventions have the potential to reduce hunting pressure on dugongs and promote positive attitudes towards conservation. Furthermore, the recognition of the cultural significance of dugongs can foster greater community involvement and support for conservation initiatives.
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Awadh, Asma, Maarifa Mwakumanya i Mohamed Omar. "The viability of seagrass ecosystems for supporting dugong recovery in Kenya". Western Indian Ocean Journal of Marine Science 23, nr 1 (25.03.2024): 19–26. http://dx.doi.org/10.4314/wiojms.v23i1.3.

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Seagrasses are the primary source of food for dugongs and a good indicator of marine ecosys- tem health. The East African dugong (Dugong dugon) population is listed as critically endan- gered under the IUCN Red List. This study aimed to document the status of seagrass beds and evaluate their potential for supporting dugong recovery in Kenya. A cross-sectional survey was conducted in December 2016 to March 2017, with data gathered through desktop reviews, inter- views, beach surveys and aerial surveys. Seven seagrass species were found at sampled sites, namely Syringodium isoetifolium, Thalassodendron ciliatum, Halophila ovalis, Zostera capensis, Thal- assia hemprichii, Cymodocea serrulata, and Halodule uninervis. Halodule and Halophila seagrass spe- cies are important in the diet of dugongs. Two dugongs were sighted during the aerial survey. The spread of sea urchins, unplanned infrastructure development, Illegal, Unreported and Unregulated fishing, and boat anchors negatively affected seagrass ecosystems and hence dugong distribution in Kenya.
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Awadh, Asma, Maarifa Mwakumanya i Mohamed Omar. "Dugongs' (Dugon Dugong) traditional values in Kenya; and their influence on their conservation." American Journal of Environment Studies 4, nr 2 (5.08.2021): 1–13. http://dx.doi.org/10.47672/ajes.759.

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Purpose: This study aimed to assess Dugongs' status distribution of dugongs (Dugong dugon) in Kenya. A dugong is a herbivorous marine mammal of the tropical and subtropical Indo-West Pacific and the Indian Ocean. Dugongs are one of four existing species of the order Sirenia, which is considered most at risk of extinction. Globally, IUCN classified the Dugong as rare; Kenya has done the same under the Wildlife Conservation and Management Act 2013, thus making Dugongs a conservation priority. This paper discusses the traditional practices of dugongs and how this influenced their population and conservation. Methodology: The study used a literature review, semi-structured questionnaires, guided interviews, and focus group discussions with respondents on obtaining data. Findings: More than 100 dugongs occurred in the Kenyan waters in the 1960s; their population has declined drastically since then. Dugongs were a sought-after delicacy on the Kenyan coast. Dugong meat was consumed for its taste and nutritional use. In the northern study areas, its oil was separated and used for cosmetic and medicinal purposes. Unique contribution to theory, practice and policy: This study confirms fishing practices and traditional consumption practices on dugongs were seen to have led to their detriment. The study recommends rich continuous education and awareness efforts to change the thinking and practices of the people towards conservation of dugongs and the environment in general.
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Louise Chilvers, B., Steven Delean, Nicholas J. Gales, Dave K. Holley, Ivan R. Lawler, Helene Marsh i Anthony R. Preen. "Diving behaviour of dugongs, Dugong dugon". Journal of Experimental Marine Biology and Ecology 304, nr 2 (czerwiec 2004): 203–24. http://dx.doi.org/10.1016/j.jembe.2003.12.010.

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Nugraha, Aditya Hikmat, Ilham Antariksa Tasabaramo, Udhi E. Hernawan, Susi Rahmawati, Andri Irawan, Juraij Juraij, Muta Ali Khalifa, I. Wayan Eka Dharmawan, Risandi Dwirama Putra i Devia Hartono Puteri. "Relationship of Distribution Seagrass Species with Dugong (Dugong dugon) Sighting at Liki Island-Papua". Omni-Akuatika 15, nr 2 (9.12.2019): 92. http://dx.doi.org/10.20884/1.oa.2019.15.2.730.

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Dugong dugon is a herbivorous marine mammal. One of Dugong's favorite foods is seagrass. This study examines the distribution of seagrass species to dugong sighting in Liki Island. The study was conducted in November 2018. Observation of seagrass conditions was carried out using a line transect method and a 50x50 cm transect with a distance interval between 10 m plots. Interviews were also conducted with the community to find out the location of Dugong presence in Liki Island. There are seven species of seagrass found in Liki Island :Enhalus acoroides, Cymodocea rotundata, Thalassia hemprichii, Halophila ovalis, Halodule uninervis, Halodule pnifolia and Syringodium isoetifolium spread over four observation stations. The results showed that Dugong in Liki Island is often found during the eastern season, they often appear in seagrass ecosystem area to do eating activities. Dugong is often found in the eastern part of Liki Island (Station 4) and sometimes also found in the western part of Liki Island (Station 3).Keywords:biodiversity,Dugong dugon, liki, papua, seagrass
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Amany, C., M. M. Kamal, F. Kurniawan i V. Sabila. "Seagrass, dugong, and people: Lessons learned from community-based conservation in Tolitoli Regency, Sulawesi Tengah, Indonesia". IOP Conference Series: Earth and Environmental Science 967, nr 1 (1.01.2022): 012032. http://dx.doi.org/10.1088/1755-1315/967/1/012032.

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Abstract Dugong (Dugong dugon) is a protected mammal in Indonesia. Hunting for dugongs is still very high, so that the status of this animal is threatened, one of which is in Tolitoli Regency, Central Sulawesi. Hence, conservation efforts need to be carried out, both species and habitat area. Based on observation and interviews, dugong conservation in Tolitoli Regency was community-based habitat management. Kelompok Masyarakat Pengawas or Monitoring Community Group (Pokmaswas) was a form of community-based management in charge of maintaining, protecting, and preserving the existence of dugong and seagrass protection. From a community perspective, significant indicators in the management of dugong habitats were community awareness, seagrass percentage, and management quality. There was 11 kind of seagrass species have been identified in Tolitoli Regency. Seagrass conditions in all three villages were characterized by less than 60% of seagrass cover, especially seagrass that was close to the shoreline. The appearance of dugongs is based not only on good seagrass conditions but also on sea conditions and ship traffic.
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Rozprawy doktorskie na temat "Dugong"

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Gerrard, Cedric Aron. "Dugong-watching tourism and encounter response of the dugong, Dugong dugon, in Shark Bay, Western Australia". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/MQ49615.pdf.

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Haynes, David. "Pesticide and heavy metal concentrations in Great Barrier Reef sediment, seagrass and dugongs (Dugong dugon) /". [St. Lucia, Qld.], 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16183.pdf.

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Churchward, Carol Anne. "The effect of depth and activity type on dugong (Dugong dugon) diving behaviour in Shark Bay, Western Australia". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ64946.pdf.

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Rahman, Ibrahim Haji Abdul. "The sea mammal Dugong dugon and its environment: Chemical analysis and speciation studies". Thesis, Rahman, Ibrahim Haji Abdul (1996) The sea mammal Dugong dugon and its environment: Chemical analysis and speciation studies. Masters by Research thesis, Murdoch University, 1996. https://researchrepository.murdoch.edu.au/id/eprint/51688/.

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Samples of sediment, seagrass and dugong tissues were analyzed for selected elements: Fe, Zn, Cu, Pb, Mn, Cd, Ni, Co, Al, P and S. Iron was the most interesting element found in relation to the samples analyzed. The level of iron in dugong liver tissue is extraordinarily high, ranging from 12 691- 71 123 µg g-1 dry weight. Ferritins from liver of dugong were isolated and characterized. Ferritin was purified by heat treatment and two-column gel filtration on Sephadex G-75 and Sephacryl S-300. Isolation of ferritin was monitored by determining iron to protein ratio. For reference, ferritin was also isolated from human liver and spleen. Purity of the isolated ferritin was determined by analytical electrophoresis. The amino acid composition and subunit nature of the purified ferritin are within the normal range reported for the well-characterized human liver and spleen ferritins and horse spleen ferritin. The core size of purified dugong ferritin was determined by electron microscopy, which also indicated that purified dugong ferritin had a limited crystallinity. Mossbauer spectra of purified ferritin at 78K indicated the presence of ferrihydrite (5Fe2O39H2O) rather than geothite-like (α-FeOOH) iron oxide. This latter iron oxide was detected in the whole liver tissue of dugong. Overall, the characteristics of purified dugong ferritin are similar to other mammalian ferritins. The elemental analysis of dugong tissue, seagrass and sediment in its environment indicated that the dugong studied live in areas of minimum anthropogenic activity. The naturally high level of iron in its environment and food is reflected in the high liver iron values. The ability of the liver tissue to withstand the high concentration of iron in the tissue without apparently damaging the tissue deserves further study.
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Folkmanova, Veronika. "The Oil of the Dugong: Towards a Cross-Cultural History of an Indigenous Medicine". Thesis, Griffith University, 2017. http://hdl.handle.net/10072/367913.

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This thesis explores the relationship between Indigenous knowledge and Australian settler perceptions of medicinal practice by examining the manufacturing and use of dugong oil. It tracks the growth of the dugong industry in Moreton Bay in the mid-nineteenth century, before analysing the way in which dugong oil made its way through the hands of medical practitioners into newspaper advertisements and exhibitions from Australia to Europe. At this time, Australia was following Britain in the move to professionalise medicine despite a continuing popularity of heterodox and home treatments. Discoveries‘ of new medicinal remedies by medical professionals blur the lines of orthodox and unorthodox medicine and add another dimension to this history. Specifically, the case of dugong oil, learned from the Indigenous inhabitants, shows the interconnectedness of the dominant and the minority stories, shedding new light on the history of medicine, products, exchange and ideas in the age of empire.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Humanities, Languages and Social Science
Arts, Education and Law
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Holley, David K. "Movement patterns and habitat usage of Shark Bay dugongs". Connect to thesis, 2006. http://portal.ecu.edu.au/adt-public/adt-ECU2007.0016.html.

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Car, Zoe. "Seeing through others' eyes : towards a hybrid ecology of marine turtle and dugong in Australia". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2012. https://ro.ecu.edu.au/theses/519.

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This thesis explores the conflict between conservationists and Indigenous communities over the hunting of marine turtles and dugong in Australia, with a view to finding a way to overcome the barriers that prevent the resolution of this issue. I approached this exploration as an ecologist, using the framework of Berkes (2004) who proposed three shifts for the field of ecology. This meant taking a systems approach and investigating the intertwining threads of the issue as possible, with a specific focus on integrating the human aspects of the problem in a participatory manner. By doing so my work entered into a third space where multiple possibilities for investigation opened up. Through listening to others with expertise on the matter (from both Indigenous and non-Indigenous cultures) I have created a hybrid account of the ecology of marine turtles and dugong in Australia. The methodology used in undertaking this research was reflexive in nature, with a focus upon both my own and Bardi and Jawi culture, utilising interviews and participant observation as my primary methods of data collection. Wherever possible, a collaborative and participatory approach to the research was undertaken, with many people assisting me in my growing understandings of this issue. I have made use of various text-based resources, including the current scientific literature, historical accounts and records and my own field diaries to support the interview data that I collected. This account traces the origins of the conflict over marine turtle and dugong in Australia and focuses on a few key moments where attempts to resolve the issue have occurred over the past twenty years. By viewing these moments through the lens of the ecological discourses described by Manuel-Naverrete et al. (2008), it can be seen that progress towards the resolution of the conflict is unlikely to occur when participants retain a strongly normative worldview, and that movement towards an ecosystemic-pluralistic framework allows for a more flexible and adaptive response to this problem. Furthermore I argue that many of the underlying causes of the conflict are based on non-Indigenous cultures’ painful grappling with our current disassociation from the other-than-human world and that the adoption of a transformative-collaborative approach to our relationship with country may provide an opportunity to heal this rift.
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Gaus, Caroline, i n/a. "Dioxins in the Marine Environment: Sources, Pathways and Fate of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans in Queensland, Australia". Griffith University. School of Public Health, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030624.144111.

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Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans(PCDFs) are two groups of lipophilic, persistent organic pollutants that are produced as by-products of various anthropogenic and industrial processes. Due to their relatively high toxic potencies and potential to bioaccumulate and biomagnify in organisms and through the food chain, the contemporary widespread distribution of these compounds is a concern to the health of the environment, wildlife and humans. This study determined the distribution, pathways and fate of PCDD/Fs in the coastal zone of Queensland, Australia, including the inshore marine environment of the World Heritage Great Barrier Reef Marine Park. This ecosystem supports unique fauna and flora such as the marine herbivorous mammal dugong (Dugong dugon) and its food source, seagrass. Elevated PCDD/Fs were present in soils and sediments along the entire Queensland coastline. Highest concentrations were found in soil from agricultural irrigation drains and in sediments near the mouths of major rivers. Elevated concentrations were associated with rural and urban types of land-use, and PCDD/Fs were present even in locations remote from anthropogenic activities. PCDD/F congener-specific analysis revealed an unusual profile in all samples, dominated by OCDD, with PCDFs present in low concentrations or below the limit of detection. Distinct HxCDD isomer patterns were observed, with the 1,2,3,7,8,9-HxCDD/1,2,3,4,6,7-HxCDD isomer pair dominating the 2,3,7,8-substituted HxCDDs. Similar congener and isomer characteristics were reported in sediments, soil and clay samples from other continents, but could not be attributed to any known source. Possible PCDD/F sources in Queensland were assessed using segmented estuarine sediment cores, for which radiochemical chronologies were established for each depth. Variations of PCDD/F concentrations in the sediment cores over several centuries of depositional history were relatively small. Elevated PCDD levels were still present in sediment slices from the early 17th century. PCDD/F homologue profiles in sediments deposited during the last 350 years were almost identical and correlated well to the characteristic profiles observed in surface sediments and soils from the entire Queensland coastline. These results suggested the presence of an unidentified PCDD source prior to the production of commercial organochlorine products. To investigate the formation of the unusual PCDD/F profiles, congener and isomer specific analyses were undertaken in soils, sediments and dated sediment cores. The results demonstrated that specific transformation processes in the environment have resulted in the observed PCDD profile characteristics. Dechlorination of OCDD was proposed to result in distinct 1,4-pattern characteristics (i.e. formation of isomers chlorinated in the 1,4,6,9-positions). Consequently, the environmental samples do not reflect the signatures of the original source. An alternative hypothesis to natural formation is discussed evaluating these processes and their implications for possible source contributions. This hypothesis explores the potential for the influence of anthropogenic PCDD precursors (e.g. pentachlorophenol) during the 1940s to 1990s. Transport of PCDD/Fs from the land-based source via impacted tributary river systems, and subsequent deposition processes are proposed to result in PCDD/F accumulation in the inshore marine ecosystem. The extent of the sediment PCDD/F contamination governs the concentrations in the extensive inshore marine seagrass meadows of Queensland. Partitioning processes in the sediment-seagrass system lead to increased toxic equivalency (TEQ) in the seagrass, compared to sediment.The relationship between contaminated inshore sediments, seagrass and dugongs were evaluated using six dugong habitat regions along the coastline. PCDD/F body burdens in dugongs are governed by sediment (and seagrass) PCDD/F concentrations in their habitat. High seagrass (and incidental sediment) ingestion rates, selective retention of toxicologically potent congeners and relatively low PCDD/F elimination capacities in dugongs are proposed to result in elevated PCDD/F concentrations and TEQ levels in adult animals. Transfer efficiencies of 4 and 27% of maternal TEQ levels to foetuses and calves (respectively) during gestation and lactation result in relatively high exposure potentials to offspring. Compared to no-observed-adverse-effect-levels in other mammals, and based on the results of this study, a tolerable daily intake (TDI) of 10-24 pg TEQ kg-1 day-1 was estimated for dugongs. The results of the present study found that dugongs from some regions along the coastline of Queensland exceed this TDI by up to 20 fold, suggesting that these populations may be at risk from PCDD/F contamination in their habitat. These results have important implications for the health of the environment, wildlife and humans and were used to develop a conceptual understanding of the sources, pathways and fate of dioxins in Queensland, Australia.
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Gaus, Caroline. "Dioxins in the Marine Environment: Sources, Pathways and Fate of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans in Queensland, Australia". Thesis, Griffith University, 2003. http://hdl.handle.net/10072/367537.

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Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans(PCDFs) are two groups of lipophilic, persistent organic pollutants that are produced as by-products of various anthropogenic and industrial processes. Due to their relatively high toxic potencies and potential to bioaccumulate and biomagnify in organisms and through the food chain, the contemporary widespread distribution of these compounds is a concern to the health of the environment, wildlife and humans. This study determined the distribution, pathways and fate of PCDD/Fs in the coastal zone of Queensland, Australia, including the inshore marine environment of the World Heritage Great Barrier Reef Marine Park. This ecosystem supports unique fauna and flora such as the marine herbivorous mammal dugong (Dugong dugon) and its food source, seagrass. Elevated PCDD/Fs were present in soils and sediments along the entire Queensland coastline. Highest concentrations were found in soil from agricultural irrigation drains and in sediments near the mouths of major rivers. Elevated concentrations were associated with rural and urban types of land-use, and PCDD/Fs were present even in locations remote from anthropogenic activities. PCDD/F congener-specific analysis revealed an unusual profile in all samples, dominated by OCDD, with PCDFs present in low concentrations or below the limit of detection. Distinct HxCDD isomer patterns were observed, with the 1,2,3,7,8,9-HxCDD/1,2,3,4,6,7-HxCDD isomer pair dominating the 2,3,7,8-substituted HxCDDs. Similar congener and isomer characteristics were reported in sediments, soil and clay samples from other continents, but could not be attributed to any known source. Possible PCDD/F sources in Queensland were assessed using segmented estuarine sediment cores, for which radiochemical chronologies were established for each depth. Variations of PCDD/F concentrations in the sediment cores over several centuries of depositional history were relatively small. Elevated PCDD levels were still present in sediment slices from the early 17th century. PCDD/F homologue profiles in sediments deposited during the last 350 years were almost identical and correlated well to the characteristic profiles observed in surface sediments and soils from the entire Queensland coastline. These results suggested the presence of an unidentified PCDD source prior to the production of commercial organochlorine products. To investigate the formation of the unusual PCDD/F profiles, congener and isomer specific analyses were undertaken in soils, sediments and dated sediment cores. The results demonstrated that specific transformation processes in the environment have resulted in the observed PCDD profile characteristics. Dechlorination of OCDD was proposed to result in distinct 1,4-pattern characteristics (i.e. formation of isomers chlorinated in the 1,4,6,9-positions). Consequently, the environmental samples do not reflect the signatures of the original source. An alternative hypothesis to natural formation is discussed evaluating these processes and their implications for possible source contributions. This hypothesis explores the potential for the influence of anthropogenic PCDD precursors (e.g. pentachlorophenol) during the 1940s to 1990s. Transport of PCDD/Fs from the land-based source via impacted tributary river systems, and subsequent deposition processes are proposed to result in PCDD/F accumulation in the inshore marine ecosystem. The extent of the sediment PCDD/F contamination governs the concentrations in the extensive inshore marine seagrass meadows of Queensland. Partitioning processes in the sediment-seagrass system lead to increased toxic equivalency (TEQ) in the seagrass, compared to sediment.The relationship between contaminated inshore sediments, seagrass and dugongs were evaluated using six dugong habitat regions along the coastline. PCDD/F body burdens in dugongs are governed by sediment (and seagrass) PCDD/F concentrations in their habitat. High seagrass (and incidental sediment) ingestion rates, selective retention of toxicologically potent congeners and relatively low PCDD/F elimination capacities in dugongs are proposed to result in elevated PCDD/F concentrations and TEQ levels in adult animals. Transfer efficiencies of 4 and 27% of maternal TEQ levels to foetuses and calves (respectively) during gestation and lactation result in relatively high exposure potentials to offspring. Compared to no-observed-adverse-effect-levels in other mammals, and based on the results of this study, a tolerable daily intake (TDI) of 10-24 pg TEQ kg-1 day-1 was estimated for dugongs. The results of the present study found that dugongs from some regions along the coastline of Queensland exceed this TDI by up to 20 fold, suggesting that these populations may be at risk from PCDD/F contamination in their habitat. These results have important implications for the health of the environment, wildlife and humans and were used to develop a conceptual understanding of the sources, pathways and fate of dioxins in Queensland, Australia.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Public Health
Faculty of Health Sciences
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Gaus, Caroline. "Dioxins in the marine environment sources, pathways, and fate of polychlorinated dibenzo-p-dioxins and dibenzofurans in Queensland, Australia /". Connect to this title online, 2002. http://bibpurl.oclc.org/web/9765.

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Książki na temat "Dugong"

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Chambers, M. R. The status of the Dugong (Dugon dugon) in Vanuatu. Noumea, New Caledonia: South Pacific Commission, 1989.

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Kinch, Jeff. An assessment of dugong (Dugong dugon) resources in the Autonomous Region of Bougainville, Papua New Guinea. Atherton, Qld: Conservation International, Melanesian Centre for Biodiversity Conservation, 2008.

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Kyōkai, Kokuritsu Kōen. Jugon hogo taisaku kentō gyōmu hōkokusho: Heisei19-nendo. Tōkyō: Kokuritsu Kōen Kyōkai, 2008.

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Ichikawa, Kōtarō. Jugon no jōzu na tsukamaekata: Umi no utahime o oikakete. Tōkyō-to Chiyoda-ku: Iwanami Shoten, 2014.

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Matthews, Elizabeth. Local knowledge about dugongs in Palau. Koror, Palau: Palau Conservation Society, 2003.

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Nix, Charles, 1967- book designer i Arcella Stefano illustrator, red. Dugong, manatee, sea cow. New York: Tsimmes Editions, 1999.

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Powell, James. Manatees & dugongs. Grantown-on-Spey: Colin Baxter Photography, 2002.

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K, Odell Daniel, red. Manatees and dugongs. New York: Facts on File, 1991.

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Bass, Deborah. Dugong surveys of Manus and Bougainville Islands, Papua New Guinea. Atherton, QLD, Australia: Conservation International, Indonesian Pacific Field Division, 2009.

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Lal, Ranjit. The Dugong and the Barracudas. New Delhi: Young Zubaan, 2015.

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Części książek na temat "Dugong"

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Sivakumar, K. "Status and Conservation of Dugong dugon in India: Strategies for Species Recovery". W Ecology and Conservation of Tropical Marine Faunal Communities, 419–32. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38200-0_27.

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Marsh, Helene. "An ecological basis for Dugong conservation in Australia". W Marine Mammals of Australasia, 9–21. P.O. Box 20, Mosman NSW 2088, Australia: Royal Zoological Society of New South Wales, 1988. http://dx.doi.org/10.7882/rzsnsw.1988.002.

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Shawky, Ahmed M. "Dugong feeding ecology along the Egyptian Red Sea". W Coral Reefs and Associated Marine Fauna around the Arabian Peninsula, 349–58. London: CRC Press, 2024. http://dx.doi.org/10.1201/9781003321392-31.

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Ketten, Darlene R., Klaus Lucke i Janet M. Lanyon. "Anatomical Measurements of Dugong Auditory Systems for Evoked Potential Studies". W The Effects of Noise on Aquatic Life, 1–10. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-10417-6_77-1.

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Marsh, Helene, i Christophe Cleguer. "Interactions between Dugong Biology and the Biophysical Determinants of Their Environment". W Oceanographic Processes of Coral Reefs, 194–209. Wyd. 2. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003320425-16.

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Nolan, Elizabeth C., i Michael T. Walsh. "Sirenians (Manatees and Dugongs)". W Zoo Animal and Wildlife Immobilization and Anesthesia, 693–702. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118792919.ch50.

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Marsh, Helene, Alana Grech i Kathryn McMahon. "Dugongs: Seagrass Community Specialists". W Seagrasses of Australia, 629–61. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-71354-0_19.

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Nasr, Dirar, Ahmed M. Shawky i Peter Vine. "Status of Red Sea Dugongs". W Springer Oceanography, 327–54. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99417-8_18.

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Rosas, Fernando César Weber, i Tatiana Lucena Pimentel. "Order Sirenia (Manatees, Dugongs, Sea Cows)". W Biology, Medicine, and Surgery of South American Wild Animals, 352–62. Ames, Iowa, USA: Iowa State University Press, 2008. http://dx.doi.org/10.1002/9780470376980.ch31.

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Bonde, Robert K., i Mark Flint. "Human Interactions with Sirenians (Manatees and Dugongs)". W Marine Mammal Welfare, 299–314. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-46994-2_17.

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Streszczenia konferencji na temat "Dugong"

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Negri Wijaya, Daya, i Neni Wahyuningtyas. "Dugong in the Account of Stamford Raffles". W lst International Cohference on Geography and Education (ICGE 2016). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/icge-16.2017.24.

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Latter, T., M. Gram-Jensen, F. Buriola, H. Dinh, M. Faggetter, R. Jupp, M. Townsend, N. Grinde, C. Mathieu i G. Byerley. "The Value of Dual-Azimuth Acquisition: Imaging, Inversion and Development over the Dugong Area". W 83rd EAGE Annual Conference & Exhibition. European Association of Geoscientists & Engineers, 2022. http://dx.doi.org/10.3997/2214-4609.202210510.

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Maire, Frederic, Luis Mejias, Amanda Hodgson i Gwenael Duclos. "Detection of dugongs from unmanned aerial vehicles". W 2013 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2013). IEEE, 2013. http://dx.doi.org/10.1109/iros.2013.6696745.

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Okumura, Naoko, Kotaro Ichikawa, Tomonari Akamatsu, Nobuaki Arai, Tomio Shinke, Takeshi Hara i Kanjana Adulyanukosol. "Stability of Call Sequence in Dugongs' Vocalization". W OCEANS 2006 - Asia Pacific. IEEE, 2006. http://dx.doi.org/10.1109/oceansap.2006.4393936.

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Warren, Christopher, Jennifer Dupont, Christopher Marshall i Mehsin Al-Ansi. "Arabian Dugongs of Qatar: Updates from a Renewed Research Initiative". W Qatar Foundation Annual Research Conference Proceedings. Hamad bin Khalifa University Press (HBKU Press), 2016. http://dx.doi.org/10.5339/qfarc.2016.eepp2552.

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Bhoraskar, Akshay, i P. Sakthivel. "A review and a comparison of Dugoff and modified Dugoff formula with Magic formula". W 2017 International Conference on Nascent Technologies in Engineering (ICNTE). IEEE, 2017. http://dx.doi.org/10.1109/icnte.2017.7947898.

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Skridaila, Kęstutis, i Alvydas Zagorskis. "KOMUNALINIŲ ATLIEKŲ DEGINIMO METU SUSIDARIUSIŲ DUGNO PELENŲ IŠPLOVIMO IR ELIUATO CHEMINĖS SUDĖTIES TYRIMAI". W Conference for Junior Researchers „Science – Future of Lithuania“. VGTU Technika, 2016. http://dx.doi.org/10.3846/aainz.2016.26.

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Šiuo metu didėjant atliekų kiekiams bei vystantis komunalinių atliekų deginimo technologijoms susidaro dideli kiekiai dugno pelenų. Kiekviena šalis laikosi savo numatytų ir patvirtintų standartų atliekant išplovimo tyrimus ir nustatant toksinių medžiagų ribą siekiant įvertinti sunkiųjų metalų ir netirpių druskų išsiplovimo iš dugno pelenų galimybes, kai jie tiesiogiai kontaktuoja su sąvartyno paviršiumi, gruntu ar vandeniu. Sunkiųjų metalų išplovimas priklauso nuo ekstarhavimo tirpiklio, pH ir taip pat skystos ir kietos medžiagos santykio. Šie išplovimo testai buvo atliekami laikantis LST EN 12457-2:2003 standartu su dugno pelenų mėginiais, kurie buvo stabilizuoti ir deponuojami sąvartyne ir dugno pelenų mėginiais, kurie prieš tai buvo apdorojami ir ruošiami. Atlikus šį išplovimo tyrimą buvo siekiama pagrįsti, ar dugno pelenai gali būti deponuojami nepavojingų atliekų sąvartyne ir juose esančių pavojingų cheminių elementų koncentracijos nėra grėsmingos. Taip pat buvo siekiama įvertinti, kaip susidariusio eliuato sudėtis skiriasi, priklausomai nuo to, ar dugno pelenai buvo apdoroti (paruošti galimam jų panaudojimui), ar ne. Tyrimo rezultatai parodė, jog sunkiųjų metalų koncentracijos nėra didelės. Pastebimas tik dugno pelenų ėminyje B (II ketvirčio) švino (Pb) koncentracijos padidėjimas – 4,605 mg/kg s. m. Tačiau ši koncentracija nesiekė reglamentuotos ribinės vertės (RV) (50 mg/kg s. m.). Iš gautų rezultatų matyti, kad atlikus išplovimo tyrimą (L/S = 10) eliuate nustatytos kitos tiriamųjų analičių koncentracijos irgi neviršijo RV pagal 1999/31/EB direktyvą.
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Seniūnaitė, Jurgita, i Saulius Vasarevičius. "KOMUNALINIŲ ATLIEKŲ DEGINIMO DUGNO PELENŲ NATŪRALAUS SENĖJIMO PROCESO ĮTAKA SUNKIŲJŲ METALŲ IŠSIPLOVIMUI". W Conference for Junior Researchers „Science – Future of Lithuania“. VGTU Technika, 2016. http://dx.doi.org/10.3846/aainz.2016.24.

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Komunalinių atliekų deginimo metu susidaro du pagrindiniai proceso atliekų srautai – lakieji ir dugno pelenai. Pastarųjų sudėtyje gausu oksidų, druskų ir metalų. Šviežių dugno pelenų panaudojimas ar deponavimas gali sukelti aplinkos komponentų užtaršos problemas, nes veikiant atmosferos krituliams susidaro įvairių medžiagų turintis filtratas. Šiame darbe tiriama meteorologinių sąlygų įtaka dugno pelenuose esančių sunkiųjų metalų išsiplovimui. Eksperimentiniams tyrimams atlikti buvo sukonstruotas laboratorinis stendas, parinkta bei sudaryta tyrimų metodika. Tyrimai atlikti esant nepastovioms (lauko) meteorologinėms sąlygoms. Dugno pelenų išsiplovimo tyrimai buvo atliekami 3 mėn., filtrato mėginiai imti 6 kartus (kas 2 sav.). Sunkiųjų metalų (Pb, Cu,) koncentracijos filtrate nustatytos atominės adsorbcijos spektrinės analizės metodu. Atlikus tyrimus nustatyta, kad švino koncentracija mėginiuose yra 0,020–0,355 mg/l. Didžiausios Pb koncentracijos nustatytos po 2 ir 8 sav. Didžiausia vario koncentracija (0,0663 mg/l) nustatyta 2 sav. sendintų pelenų filtrate. Komunalinių atliekų deginimo dugno pelenams išbuvus lauke 6–12 sav. vario koncentracija buvo 0,0207–0,0243 mg/l.
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Tanaka, Kotaro, Hideaki Nishizawa, Hiromichi Mitamura, Kongkiat Kittiwattanawong, Kotaro Ichikawa i Nobuaki Arai. "Effects of environmental factors on vocalization pattern of dugongs revealed by generalized linear model". W 2016 Techno-Ocean (Techno-Ocean). IEEE, 2016. http://dx.doi.org/10.1109/techno-ocean.2016.7890747.

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Semionovaitė, Goda, Gytautas Ignatavičius i Marina Valentukevičienė. "UŽTERŠTUMO SUNKIAISIAIS METALAIS VILNIOS UPĖS DUGNO NUOSĖDŲ TYRIMAI". W Conference for Junior Researchers „Science – Future of Lithuania“. VGTU Technika, 2016. http://dx.doi.org/10.3846/aainz.2016.23.

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Straipsnyje išnagrinėta Vilnios upės dugno nuosėdų tarša sunkiaisiais metalais. Tiriamasis objektas yra Vilniuje, Vilnios upėje, 7 kilometrų ruože. Nagrinėta sunkiųjų metalų koncentracija upės dugno nuosėdose. Tyrimai atlikti abiejuose upės krantuose, atsižvelgiant į šalia esančius taršos objektus. Nuosėdų tyrimui naudotas rentgeno fluorescencinis spektrometras. Gauti rezultatai apdoroti ir palyginti su didžiausiomis leistinomis sunkiųjų metalų koncentracijomis (DLK) Lietuvos upėse. Nustatomos ėmimo vietos užterštumo kategorijos (laipsniai) pagal Zd rodiklį (HN 60:2004) taip įvertinant didžiausias taršos susitelkimo vietas. Tirtajame Vilnios upės ruože, viename mėginių paėmimo taške, yra nustatytas didelis suminis rodiklis (Zd), kuris siekia 118, o tai sudaro apie 9 % visų tirtųjų mėginių paėmimo vietų Vilnios upės tirtajame ruože.
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Raporty organizacyjne na temat "Dugong"

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Canto, Patricia, red. Euskal Autonomia Erkidegoko Lehiakortasunari buruzko 2018ko Txostena. Universidad de Deusto, 2018. http://dx.doi.org/10.18543/ffmt9619.

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Jarraian aurkezten dugun diagnostikoa azterketa labur eta trinko bat da; lehiakortasunari eta ongizateari lotutako adierazle nagusien bilakaera erakusten du, gainerako lurraldeekin alderatuta. Lan honen lagungarri, onlineko plataforma bat sortu dugu, txostenaren adierazleak denbora errealean kontsultatzeko aukera ematen duena, datu berrienak edukitzeko. Tresna probatzera eta, zuen komentarioen bidez, hobetzen laguntzera gonbidatu nahi zaituztegu.
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Canto, Patricia, red. Euskal Autonomia Erkidegoko Lehiakortasunari buruzko 2019ko Txostena. Lehiakortasun diagnostikoa. Universidad de Deusto, 2019. http://dx.doi.org/10.18543/rubh8550.

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Jarraian aurkezten dugun diagnostikoa azterketa labur eta trinko bat da; lehiakortasunari eta ongizateari lotutako adierazle nagusien bilakaera erakusten du, gainerako lurraldeekin alderatuta. Lan honen lagungarri, onlineko plataforma bat sortu dugu, txostenaren adierazleak denbora errealean kontsultatzeko aukera ematen duena, datu berrienak edukitzeko. Tresna probatzera eta, zuen komentarioen bidez, hobetzen laguntzera gonbidatu nahi zaituztegu.
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Canto, Patricia, red. Lehiakortasunari buruzko 2019ko Txostena Gaitasunak, panazea ote? Universidad de Deusto, 2019. http://dx.doi.org/10.18543/afpn9765.

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Lehiakortasunari buruzko 2019ko Txostenari gaikakoLehiakortasunari buruzko 2019ko Txostenari gaikakotxosten bat erantsi diogu aurten, gaitasunen ingurukoa, hurrengo urteetan, banakaeta kolektibo gisa, eskuratu behar dugun baliabide bat izango baita.Gaitasunen inguruko eztabaida konplexua da; pertsonei, enpresei, gizarte eragileei,hezkuntza sektoreari, erabaki hartzaile publikoei eta gizarteari, oro har, eragiten dio.Gaitasunak, panazea ote? Lehiakortasunari buruzko 2019ko Txostenak eztabaida horriheltzen dio eta hurbiltzen ari zaizkigun egiturazko aldaketei aurre egiten lagundukoduten analisiak eskaintzen ditu.
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Magro, Edurne, Mikel Navarro, Rakel Vázquez i Francisco Carrillo. Diagnóstico de Competitividad del Territorio Histórico de Bizkaia 2021. Redaktor Edurne Magro. Universidad de Deusto, 2022. http://dx.doi.org/10.18543/irxg4815.

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El diagnóstico de la competitividad de un territorio permite entender su posición competitiva en comparación con otros (o consigo mismo en el tiempo), así como identificar los factores de competitividad específicos del territorio y de su tejido empresarial. Estos diagnósticos ayudan a detectar los grandes retos estructurales de su economía y sociedad para, a partir de ahí, diseñar las respuestas para la mejora competitiva. Orkestra- Instituto Vasco de Competitividad ha venido realizando a lo largo de su historia múltiples diagnósticos de competitividad regionales, entre los que sobresalen los publicados en sucesivos Informes de Competitividad del País Vasco. Sin embargo, resulta interesante disponer de un observatorio y un diagnóstico de competitividad subregional, dadas las notables competencias que en materia de promoción económica y en el ámbito social los territorios históricos poseen, por una parte, y dado que la posición competitiva y el empleo efectuado de las competencias señaladas difiere bastante de unos territorios históricos a otros, por otra. Además, en el caso de Bizkaia, el Departamento de Promoción Económica de la Diputación Foral de Bizkaia cuenta con una estrategia de desarrollo comarcal, Bizkaia Orekan Sakonduz, para el desarrollo de la competitividad de Bizkaia de manera equilibrada. El Observatorio de Competitividad de Bizkaia, pretende dotar de inteligencia estratégica al Departamento en primer lugar, con el análisis de la competitividad del territorio histórico, que se presenta en este informe, y a la iniciativa Bizkaia Orekan Sakonduz en un segundo lugar, a través de un diagnóstico de competitividad comarcal. Para la realización de este diagnóstico y la selección de indicadores se ha utilizado el nuevo marco de competitividad al servicio del bienestar que ha desarrollado Orkestra y que muestra una evolución del marco anterior. Este marco, y la metodología empleada para la realización de este análisis se presenta en el Capítulo 2. En el Capítulo 3 se presenta el análisis de los indicadores seleccionados por cada uno de los bloques definidos, para después presentar una serie de conclusiones. ================================================================================================== Lurralde bateko lehiakortasunaren diagnostikoari esker bere lehiatzeko kokapena uler dezakegu, besteekin alderatuta (edo denboran zehar). Horrekin batera, lurraldeko eta bertako enpresetako lehiakortasun faktore bereziak ere identifikatu ahal izango ditugu. Diagnostiko horiek laguntzen dute lurralde jakin bateko ekonomia eta gizartearen egiturazko erronka handiak antzematen eta, horietatik abiatuta, lehiakortasuna hobetzeko erantzunak diseinatzen. Orkestra-Lehiakortasunerako Euskal Institutuak erregio mailako lehiakortasunari buruzko diagnostiko ugari egin ditu bere ibilbidean. Horietan nabarmenenak Euskal Autonomia Erkidegoko Lehiakortasunari buruzko urtez urteko txostenak dira. Hala ere, interesgarria da erregioa baino maila beheragoko lehiakortasunaren behatoki eta diagnostiko bat edukitzea, alde batetik lurralde historikoek ekonomia sustatzeko eta gizarte gaietako eskumen ugari dituztelako eta beste alde batetik, lurralde historiko batzuen eta besteen lehiatzeko kokapenean eta eskumenen aplikazioan aldeak daudelako. Gainera, Bizkaiari dagokionez, Bizkaiko Foru Aldundiko Ekonomia Sustatzeko Sailak eskualde garapeneko estrategia bat du, Bizkaia Orekan Sakonduz, Bizkaiko lehiakortasuna modu orekatuan garatzeko. Bizkaiko Lehiakortasunaren Behatokiak adimen estrategikoa eman nahi dio bai Sailari, lurralde historikoaren lehiakortasuna txosten honetan aztertuz, eta bai Bizkaia Orekan Sakonduz ekimenari, eskualdeetako lehiakortasunaren diagnostikoaz baliatuz. Diagnostikoa egiteko eta adierazleak hautatzeko Orkestrak azken hilabeteetan garatu duen esparrua erabili dugun, ongizatea helburu izango duen lehiakortasunaren esparru berria, aurreko esparruaren bilakaera dena. Esparrua bera eta azterketa egiteko erabili dugun metodologia 2. kapituluan azaldu dugu. 3. kapituluan, multzo bakoitzean hautatutako adierazleen analisia aurkeztu dugu eta, amaitzeko, ondorio nagusiak
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Stratigraphic cross section showing upper Paleocene coal-bearing rocks of the Tongue River member of the Fort Union Formation in the Coal Bank Draw and Dugout Creek North quadrangles, Converse County, southeastern Powder River basin, Wyoming. US Geological Survey, 1991. http://dx.doi.org/10.3133/i2013.

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