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Journal articles on the topic "Koala distribution":
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Dique, David S., Harriet J. Preece, Jim Thompson, and Deidré L. de Villiers. "Determining the distribution and abundance of a regional koala population in south-east Queensland for conservation management." Wildlife Research 31, no. 2 (2004): 109. http://dx.doi.org/10.1071/wr02031.
Koala surveys were used to determine the distribution and abundance of a threatened regional koala population in south-east Queensland to assist with the development of effective conservation management programs. Daytime systematic searches of strip transects were conducted twice yearly from 1996 to 1999 to determine koala density at a number of sites in urban, remnant bushland and bushland strata. Mean density estimates for 27 survey sites ranged from 0.02 to 1.26 koalas ha–1. Koala densities were generally higher in large tracts and remnant patches of eucalypt bushland towards the centre of the region with lower but significant densities in urban areas. Two estimates of population size were obtained: 7230 (±1668, 95% confidence limit) and 6246 (±1444, 95% confidence limit). The estimate of 6246 was considered to provide a better indication of actual population size as it reduced the variation within strata and took into account the distribution of koalas across the region. It is likely that determining habitat areas for conservation based on where koalas actually occur rather than identifying distributions of 'preferred' tree species or community reports, as has been promoted in other studies, is a better indicator of the conservation significance of remnant habitat areas. Future koala-management programs should ensure that the significance of eucalypt bushland areas towards the centre of the study area is not compromised by future urban development and associated threats to koalas.
2
Sullivan, B. J., W. M. Norris, and G. S. Baxter. "Low-density koala (Phascolarctos cinereus) populations in the mulgalands of south-west Queensland. II. Distribution and diet." Wildlife Research 30, no. 4 (2003): 331. http://dx.doi.org/10.1071/wr00032.
This study used faecal pellets to investigate the broadscale distribution and diet of koalas in the mulgalands biogeographic region of south-west Queensland. Koala distribution was determined by conducting faecal pellet searches within a 30-cm radius of the base of eucalypts on 149 belt transects, located using a multi-scaled stratified sampling design. Cuticular analysis of pellets collected from 22 of these sites was conducted to identify the dietary composition of koalas within the region. Our data suggest that koala distribution is concentrated in the northern and more easterly regions of the study area, and appears to be strongly linked with annual rainfall. Over 50% of our koala records were obtained from non-riverine communities, indicating that koalas in the study area are not primarily restricted to riverine communities, as has frequently been suggested. Cuticular analysis indicates that more than 90% of koala diet within the region consists of five eucalypt species. Our data highlights the importance of residual Tertiary landforms to koala conservation in the region.
3
Ellis, W. A. H., B. J. Sullivan, A. T. Lisle, and F. N. Carrick. "The spatial and temporal distribution of koala faecal pellets." Wildlife Research 25, no. 6 (1998): 663. http://dx.doi.org/10.1071/wr97028.
Faecal pellets were collected under trees used by free-ranging koalas in south-western, central and south-eastern Queensland to determine the spatial and temporal distribution of pellets with respect to the activity of koalas. Deposition of faecal pellets by koalas was analysed according to the time of day at which the tree was occupied. For free-ranging koalas, 47% of daily faecal pellet output was recovered using a collection mat of 8 × 8 m placed under a day-roost tree. The best predictor of pellet production was the presence of a koala in a tree between 1800 hours and midnight. For other periods, there was no relationship between period of tree occupancy and faecal pellet recovery. There was a significant relationship between the average length of tree occupancy and the time of day that a koala entered a tree.
4
Wedrowicz, Faye, Jennifer Mosse, Wendy Wright, and Fiona E. Hogan. "Using non-invasive sampling methods to determine the prevalence and distribution of Chlamydia pecorum and koala retrovirus in a remnant koala population with conservation importance." Wildlife Research 45, no. 4 (2018): 366. http://dx.doi.org/10.1071/wr17184.
Context Pathogenic infections are an important consideration for the conservation of native species, but obtaining such data from wild populations can be expensive and difficult. Two pathogens have been implicated in the decline of some koala (Phascolarctos cinereus) populations: urogenital infection with Chlamydia pecorum and koala retrovirus subgroup A (KoRV-A). Pathogen data for a wild koala population of conservation importance in South Gippsland, Victoria are essentially absent. Aims This study uses non-invasive sampling of koala scats to provide prevalence and genotype data for C. pecorum and KoRV-A in the South Gippsland koala population, and compares pathogen prevalence between wild koalas and koalas in rescue shelters. Methods C. pecorum and KoRV-A provirus were detected by PCR of DNA isolated from scats collected in the field. Pathogen genetic variation was investigated using DNA sequencing of the C. pecorum ompA and KoRV-A env genes. Key results C. pecorum and KoRV-A were detected in 61% and 27% of wild South Gippsland individuals tested, respectively. KoRV-A infection tended to be higher in shelter koalas compared with wild koalas. In contrast with other Victorian koala populations sampled, greater pathogen diversity was present in South Gippsland. Conclusions In the South Gippsland koala population, C. pecorum is widespread and common whereas KoRV appears less prevalent than previously thought. Further work exploring the dynamics of these pathogens in South Gippsland koalas is warranted and may help inform future conservation strategies for this important population. Implications Non-invasive genetic sampling from scats is a powerful method for obtaining data regarding pathogen prevalence and diversity in wildlife. The use of non-invasive methods for the study of pathogens may help fill research gaps in a way that would be difficult or expensive to achieve using traditional methods.
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Masters, Pip, Toni Duka, Steve Berris, and Graeme Moss. "Koalas on Kangaroo Island: from introduction to pest status in less than a century." Wildlife Research 31, no. 3 (2004): 267. http://dx.doi.org/10.1071/wr03007.
In less than a century the ecological profile of koalas on Kangaroo Island has shifted from that of a species introduced for conservation purposes to one of pest status. Between 1923 and 1925, 18 koalas were released on Kangaroo Island. Their numbers increased rapidly and in 1997 a population-control program was implemented based on a population estimate of 5000 koalas. During the course of this program, it became clear that the koala population on Kangaroo Island was much greater and more widely distributed than previously thought, hence a more comprehensive population survey was carried out.In 2000–01 the koala population size was calculated using a stratified sampling approach based on five 'catchment units' and three habitat classifications that were known to support koalas. The koala population was estimated to be ~27 000 koalas in 2001. There were substantial differences in koala density in the low-, medium- and high-quality habitat within each catchment unit, and therefore large differences in the spatial distribution of koalas across Kangaroo Island. This revised population estimate has substantial ramifications for the Kangaroo Island Koala Management Program that was set in place in 1997.
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Clifton, I. D., W. A. H. Ellis, A. Melzer, and G. Tucker. "Water turnover and the northern range of the koala (Phascolarctos cinereus)." Australian Mammalogy 29, no. 1 (2007): 85. http://dx.doi.org/10.1071/am07010.
Water turnover for koalas is positively correlated with the moisture content of selected trees suggesting that browse choice was driven by water requirements in summer but energy demands in winter. We compared the distribution of the koala to relative humidity and found that the bioregional delineation of the koala?s range corresponds closely to regions experiencing an average 9am relative humidity of less than 80% in February. This indicates that the northern coastal distribution of the koala may be limited by respiratory evaporative water loss as a cooling mechanism.
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Predavec, Martin, Daniel Lunney, Ian Shannon, Dave Scotts, John Turbill, and Bill Faulkner. "Mapping the likelihood of koalas across New South Wales for use in Private Native Forestry: developing a simple, species distribution model that deals with opportunistic data." Australian Mammalogy 37, no. 2 (2015): 182. http://dx.doi.org/10.1071/am15001.
In Private Native Forestry in New South Wales, species-specific provisions in the code of practice are triggered by the presence of koalas (Phascolarctos cinereus), based on existing database records in the Atlas of NSW Wildlife. Whereas Species Distribution Modelling allows questions to be posed regarding the distribution of a species, and how it relates to environmental variables and threats, the key question, in many management situations, is whether or not a species is, or has been, present at a particular location, rather than the overall predicted distribution of the species. This is particularly the case for such a high-profile species as the koala. In this project, we developed a simple distribution model for the koala in New South Wales based on the proportion of koala records from within a suite of mammal records in 10 km × 10 km cells. This provides a measure of the likelihood of koalas being present. At the same time it allows deficiencies in the data to be highlighted, and recommendations made for further survey. This model and map will allow the potential for more robust and transparent decisions to be made regarding koala protection in areas proposed for private native forestry.
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Dique, David S., Deidré L. de Villiers, and Harriet J. Preece. "Evaluation of line-transect sampling for estimating koala abundance in the Pine Rivers Shire, south-east Queensland." Wildlife Research 30, no. 2 (2003): 127. http://dx.doi.org/10.1071/wr02042.
Distance sampling using line transects has not been previously used or tested for estimating koala abundance. In July 2001, a pilot survey was conducted to compare the use of line transects with strip transects for estimating koala abundance. Both methods provided a similar estimate of density. On the basis of the results of the pilot survey, the distribution and abundance of koalas in the Pine Rivers Shire, south-east Queensland, was determined using line-transect sampling. In total, 134 lines (length 64 km) were used to sample bushland areas. Eighty-two independent koalas were sighted. Analysis of the frequency distribution of sighting distances using the software program DISTANCE enabled a global detection function to be estimated for survey sites in bushland areas across the Shire. Abundance in urban parts of the Shire was estimated from densities obtained from total counts at eight urban sites that ranged from 26 to 51 ha in size. Koala abundance in the Pine Rivers Shire was estimated at 4584 (95% confidence interval, 4040–5247). Line-transect sampling is a useful method for estimating koala abundance provided experienced koala observers are used when conducting surveys.
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Lunney, Daniel, Stephen Phillips, John Callaghan, and Dionne Coburn. "Determining the distribution of Koala habitat across a shire as a basis for conservation: a case study from Port Stephens, New South Wales." Pacific Conservation Biology 4, no. 3 (1998): 186. http://dx.doi.org/10.1071/pc980186.
The Australian National Koala Conservation Strategy recognizes the importance of conserving Koalas in their existing habitat, particularly through the integration of Koala conservation into local government planning (ANZECC 1998). The aim of this study was to define, rank and map the distribution of Koala habitat in Port Stephens Shire, New South Wales. The procedure was to merge the results of two independent survey techniques, each of which was interpreted using a vegetation map specifically prepared for this study. A field survey used a plot-based sampling protocol to determine tree species preferences based on the presence/absence of Koala faecal pellets. Data were obtained on 8 764 trees comprising 19 eucalypt and 12 non-eucalypt species. A high-profile community survey obtained 2 756 Koala records. Koala habitat maps from both survey methods were examined as overlapping GIS layers. Combined Koala habitat categories were then devised, ranked and mapped across the Shire. This study provides a practical and repeatable means of identifying and conserving Koala habitat in existing remnant vegetation over which local government has planning jurisdiction.
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Ellis, Murray V., Susan G. Rhind, Martin Smith, and Daniel Lunney. "Changes in the distribution of reports of the koala (Phascolarctos cinereus) after 16 years of local conservation initiatives at Gunnedah, north-west New South Wales, Australia." Pacific Conservation Biology 23, no. 1 (2017): 63. http://dx.doi.org/10.1071/pc16004.
In the early 1990s the koala became the mascot for a revegetation program to control salinity on agricultural land around Gunnedah in New South Wales, and a snapshot of the koala’s distribution in the shire was collected at that time, mainly via a mail survey. After the success of tree plantings in the 1990s, the koala population of the Liverpool Plains became a focus of increasing local conservation efforts, as well as research to explain koala population dynamics. This included a repeat mail survey conducted in 2006, which enabled the comparison of the reported distributions to be undertaken. These two citizen science surveys had different response rates but both produced extensive datasets. By 2006, koalas were reported from a wider extent than in 1990, particularly to the north and east of the town, and in more developed agricultural areas, but with highest densities in areas with more than 25% wooded vegetation. In 1990, koalas were reported mostly from locations that were surrounded by more than 40% wooded vegetation with the core of the distribution being on the basalt hills south of the town of Gunnedah. Koalas were also reported with increased relative frequency in the town, and this formed the core of the reported sightings at that time. There were still no reports from many of the vegetated hilly margins of the shire. The observed changes in the pattern of reporting reflects the actual distribution of koalas intersected with the likelihood of observation and the willingness of people to report koalas, and also identify the areas that may be under-sampled to determine the true habitat breath of koalas in the area.
Dissertations / Theses on the topic "Koala distribution":
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Ward, Steven J., University of Western Sydney, of Science Technology and Environment College, and of Science Food and Horticulture School. "Koalas and the community : a study of low density populations in Southern Sydney." THESIS_CSTE_SFH_Ward_S.xml, 2002. http://handle.uws.edu.au:8081/1959.7/265.
The aim of this study was to investigate the distribution, density, health, condition, fertility, causes of mortality, home range size and tree preferences, of koalas in low density populations in the south of Sydney. This information was then used to make management recommendations; good management is needed because there is rapid human population growth and pressure for development of koala habitat in the Sydney region. State Environment Planning Policy 44(SEPP44) is New South Wales legislation that relates to developments affecting koala habitat. Problems in the application of SEPP44 in the Sydney region were found to exist, such as Sutherland Local Government Area (LGA) not being covered, and changes to this legislation are also recommended. Doctor of Philosophy (PhD)
2
Dique, David S. "The distribution, abundance and dynamics of a regional koala population in south-east Queensland /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17880.pdf.
Beeskow, Bettina. "The occurrence, distribution and orgin of hydrocarbons in the Khibiny Nepheline Syenite Complex, Kola Peninsula, Russia." Thesis, Kingston University, 2007. http://eprints.kingston.ac.uk/20382/.
The occurrence of hydrocarbon-bearing fluids in alkaline igneous rocks has been known for many years, but their origin is still controversial. The fluids may be of biogenic origin, derived from the host rocks, or the result of abiogenic processes. Three mechanisms for abiogenic production have been proposed: mantle derivation, late-magmatic C-O-H respeciation and post-magmatic Fischer- Tropsch generation. Here, new petrographic, micro thermometric and laser Raman data, combined with data of carbon and bulk gas content and isotope signatures as well as permeability and porosity data of material from throughout the Khibiny intrusion are presented. These are discussed in the context of previously published work in order to characterise the occurrence and distribution of hydrocarbon-bearing fluids and to reassess the hypotheses for hydrocarbon generation for the Khibiny pluton. Bulk gas data show a dominance of methane and only minor concentrations of higher hydrocarbons in whole-rock samples. On average, 12.8 cm" of hydrocarbons are released from one kg rock of the Khibiny pluton. Solid carbon is present at levels between 0.21 and 0.06 wt%. Both, methane and carbon contents are highest in the marginal areas suggesting a possible contribution from the host rocks. The fluid inclusion study shows that about 90 % of the inclusion population is methane-dominant and only 10 % water-dominant. The majority of the fluid inclusions are secondary and were trapped over a wide range of P-T conditions within subsequently healed microfractures. P-T entrapment conditions for primary fluid inclusions are around 600 MPa and 600°C. Melt inclusions often contain a methane-rich fluid phase. Isotope data for methane indicate a largely abiogenic origin, but the decrease of o13C towards the margin of the complex from - 5.4 %0 to - 22.4 %0 suggests addition of biogenic material derived from the host rocks. This is in agreement with the results of the fluid inclusion plane and mieroerack study that indicates a high degree of fluid movement throughout the history of the pluton, up to the present day. Average palaeo and modem porosity estimates are 5.56 % and 4.80 %, respectively. Average palaeo and modem permeability values are 2.38 mD and 1.95 mD, respectively. Basedon these porosity values the methane content in the Khibiny pluton is estimated at between 416 km' and 7649 km" In summary, isotope data, the presence of primary Ctla-dominated fluid inclusions and melt inclusions, which also contain a methane-rich gas phase, indicate an abiogenic mantle origin of the hydrocarbons. There is little evidence for operation of a Fischer-Tropsoh-type reaction in methane generation. An increase in carbon and methane content, together with decreasing O13C isotope values towards the pluton margin suggests that magmatically derived abiogenic hydrocarbons may have mixed with biogenic hydrocarbons derived from the surrounding country rocks.
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Nanewortor, Xoese Kobla [Verfasser], Harald [Akademischer Betreuer] Schwarz, and Przemyslaw [Akademischer Betreuer] Janik. "A concept of renewable energy plant-storage capacity sizing for integration into electrical distribution network / Xoese Kobla Nanewortor ; Harald Schwarz, Przemyslaw Janik." Cottbus : BTU Cottbus - Senftenberg, 2016. http://d-nb.info/1114666890/34.
Fajkus, Jan. "Visualizace cyklických motorů." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2010. http://www.nusl.cz/ntk/nusl-237267.
This Master's thesis deals with application design and implementation. Application is designed for composition of gears. It is built as a simple computer game. It also contains 3D model renderer, which shows the movement of gears in gearbox. Program is implemented in C language using OpenGL library.
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Vajdák, Martin. "Návrh souboru zařízení pro seřízení podvozku závodního automobilu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318805.
Diplomová práce se zabývá návrhem zařízení pro měření parametrů podvozku závodního vozidla (sbíhavost/rozbíhavost, příklon/odklon, světlá výška vozu, rozložení hmotnosti), které následně slouží pro jeho seřízení. Úvodní teoretická část uvádí přehled nejdůležitějších parametrů podvozku, které mají podstatný vliv na chování a ovladatelnost vozu a které jsou tak nejčastěji předmětem zájmu. Následující kapitola shrnuje metody a zařízení, které se dnes pro měření parametrů podvozku využívají a uvádí jejich výhody a nevýhody. Předposlední kapitola teoretické části je věnována obecným doporučením pro měření parametrů podvozku vozidla a jeho seřizování. Poslední kapitola teoretické části uvádí požadavky na zařízení, jehož návrh je předmětem této práce. Úvod praktické části práce je věnován popisu konstrukce dvou navržených variant pro měření parametrů podvozku vozidla. Následující kapitola pak popisuje přípravu a průběh měření s využitím navržených souborů zařízení. Další kapitola je věnována výběru snímačů a zařízení pro měření. Závěr této kapitoly pak shrnuje přibližné celkové náklady na výrobu obou navržených variant. Poslední kapitolou je napěťová a deformační analýza navržené podpěry automobilu, která podepírá automobil namísto jeho kol. Závěr diplomové práce shrnuje dosažené cíle a zároveň uvádí návrhy a doporučení dalšího vývoje navržených zařízení.
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McLean, Natasha. "Ecology and management of overabundant koala (Phascolarctos cinereus) populations." 2003. http://repository.unimelb.edu.au/10187/1729.
Overabundant species may have considerable impacts on their habitat, other species and their own populations, thereby threatening biodiversity. Koalas (Phascolarctoscinereus) are overabundant at a number of locations in southeastern Australia due to low mortality and the inability of individuals to emigrate. This has led to the over-browsing of their food resources. Active management is required in order to prevent habitat degradation and the starvation of koalas particularly in populations without Chlamydia-infection, a disease that can cause infertility in females. Predictive population modelling is required if we are to understand the dynamics of the overabundant populations and investigate the consequences and effectiveness of different management strategies. Accurate data for the parameters that contribute to population growth, such as age structure, sex ratio, and age-specific schedules of mortality and fecundity, are therefore needed. In this study, the values of these parameters were determined for overabundant koala populations at Snake Island, Framlingham, Mt Eccles and French Island (Victoria). Data from additional populations were used to ascertain some parameters. These data were used to build stage-structured models to predict population growth of one Chlamydia-free and one Chlamydia-infected koala population.
Books on the topic "Koala distribution":
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Phillips, Bill. Koalas: The little Australians we'd all hate to lose. Canberra: AGPS Press Publication, 1990.
Rhodes, J. R., C. A. McAlpine, A. F. Zuur, G. M. Smith, and E. N. Ieno. "GLMM Applied on the Spatial Distribution of Koalas in a Fragmented Landscape." In Statistics for Biology and Health, 469–92. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-87458-6_21.
Turunen, Minna, Satu Huttunen, Jukka Lamppu, and Paivi Huhtala. "Characteristics and Geographical Distribution of the Changes in Scots Pine Needle Surfaces in Finnish Lapland and the Kola Peninsula." In Air Pollutants and the Leaf Cuticle, 359–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-79081-2_33.
Conference papers on the topic "Koala distribution":
1
Stevanovic, Vladimir D., Zoran V. Stosic, Michael Kiera, and Uwe Stoll. "Numerical Simulation and Analyses of the Loss of Feedwater Transient at the Unit 4 of Kola NPP." In 10th International Conference on Nuclear Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/icone10-22452.
A three-dimensional numerical simulation of the loss-of-feed water transient at the horizontal steam generator of the Kola nuclear power plant is performed. Presented numerical results show transient change of integral steam generator parameters, such as steam generation rate, water mass inventory, outlet reactor coolant temperature, as well as detailed distribution of shell side thermal-hydraulic parameters: swell and collapsed levels, void fraction distributions, mass flux vectors, etc. Numerical results are compared with measurements at the Kola NPP. The agreement is satisfactory, while differences are close to or below the measurement uncertainties. Obtained numerical results are the first ones that give complete insight into the three-dimensional and transient horizontal steam generator thermal-hydraulics. Also, the presented results serve as benchmark tests for the assessment and further improvement of one-dimensional models of horizontal steam generator built with safety codes.
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Горяева, А., and A. Goryaeva. "The Distribution of Seabirds and Shorebirds on the Water Area and Coast of the Kola Bay in May-June of the Year 2013." In XXVII International Shore Conference "Arctic Coast: The Path to Sustainability". Academus Publishing, 2019. http://dx.doi.org/10.31519/conferencearticle_5cebbc15c05f51.45880098.
