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65 results for “koala”
Data from: Tree-hugging koalas demonstrate a novel thermoregulatory mechanism for arboreal mammals
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Data from: Development and field validation of a regional, management-scale habitat model: a koala Phascolarctos cinereus case study
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Data from: Demographic, environmental and genetic determinants of mating success in captive koalas (Phascolarctos cinereus)
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Koala greater glider detection histories: Richmond Range NP
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Data from: Reliable genotyping of the koala (Phascolarctos cinereus) using DNA isolated from a single faecal pellet
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Data from: Immunomics of the koala (Phascolarctos cinereus )
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Mini-acoustic sensors reveal occupancy and threats to koalas (Phascolarctos cinereus) in private native forests
<p>1. Forests on private land have a wide range of uses that span activities such as recreation, primary production and nature conservation. Traditionally, it has been difficult for researchers to access private land to undertake systematic surveys. We used mini-acoustic sensors (Audiomoth) mailed via the postal service to overcome landholder concerns about researchers accessing private property, with a focus on properties used for private native forestry.</p> <p>2. We surveyed koalas, an iconic threatened marsupial, in north-east New South Wales, Australia using passive acoustics, with repeat surveys over consecutive nights to account for imperfect detection in an occupancy modelling framework.</p> <p>3. Over three years, we surveyed 128 sites and recorded 2,560 male bellows. Detection probability over seven nights was high (>0.79), but varied substantially between years, due to use of different sensors, housings and weather conditions. After accounting for detection probability, modelling revealed that koalas commonly occupied private native forests of the study region (probability of occupancy = 0.58±0.08).</p> <p>4. Occupancy was modelled against several covariates and it varied with the landscape extent of sealed roads (-ve), NDVI (-ve) and a habitat suitability model (+ve, but minor). There was no support for occupancy in private forests to be related to a range of other factors including extent of surrounding cleared land, timber harvesting history, fire and other measured habitat features.</p> <p>5. Synthesis and applications. We conclude that mini-acoustic recorders mailed to landholders were a highly effective method for assessing koala occupancy on private land and the approach could be deployed more widely for a range of species. Private native forests in partly cleared landscapes are commonly occupied by koalas, highlighting that practices seeking to balance conservation and production should be encouraged.</p>
Phascolarctos cinereus Lone Pine Koala Sanctuary, Queensland, Australia. Photo: Cyril Ruoso/Bios in Phascolarctida
Phascolarctos cinereus Lone Pine Koala Sanctuary, Queensland, Australia. Photo: Cyril Ruoso/Bios
Susceptibility to a sexually transmitted disease in a wild koala population shows heritable genetic variance but no inbreeding depression
<p><span>The koala, one of the most iconic Australian wildlife species, is facing several concomitant threats that are driving population declines. Some threats are well known and have clear methods of prevention (e.g., habitat loss can be reduced with stronger land-clearing control), whereas others are less easily addressed. One of the major current threats to koalas is chlamydial disease, which can have major impacts on individual survival and reproduction rates and can translate into population declines. Effective management strategies for the disease in the wild are currently lacking, and to date we know little about the determinants of individual susceptibility to disease. Here we investigated the genetic basis of variation in susceptibility to chlamydia using one of the most intensively studied wild koala populations. We combined data from veterinary examinations, chlamydia testing, genetic sampling and movement monitoring. Out of our sample of </span><span>342 wild koalas, 60 were found to have chlamydia.</span><span> Using genotype information on 5007 SNPs to investigate the role of genetic variation in determining disease status, we found no evidence of inbreeding depression, but a heritability of 0.11 (95%CI = 0.05 – 0.23) for the probability that koalas had chlamydia. Heritability of susceptibility to chlamydia could be relevant for future disease management, as it suggests adaptive potential for the population.</span></p>
Data from: Koalas (Phascolarctos cinereus) from Queensland are genetically distinct from 2 populations in Victoria
The koala (Phascolarctos cinereus) suffered population declines and local extirpation due to hunting in the early 20th century, especially in southern Australia. Koalas were subsequently reintroduced to the Brisbane Ranges (BR) and Stony Rises (SR) by translocating individuals from a population on French Island descended from a small number of founders. To examine genetic diversity and north–south differentiation, we genotyped 13 microsatellite markers in 46 wild koalas from the BR and SR, and 27 Queensland koalas kept at the US zoos. The Queensland koalas displayed much higher heterozygosity (H O = 0.73) than the 2 southern Australian koala populations examined: H O = 0.49 in the BR, whereas H O = 0.41 in the SR. This is consistent with the historical accounts of bottlenecks and founder events affecting the southern populations and contrasts with reports of high genetic diversity in some southern populations. The 2 southern Australian koala populations were genetically similar (F ST = 0.018, P = 0.052). By contrast, northern and southern Australian koalas were highly differentiated (F ST = 0.27, P < 0.001), thereby suggesting that geographic structuring should be considered in the conservation management of koalas. Sequencing of 648bp of the mtDNA control region in Queensland koalas found 8 distinct haplotypes, one of which had not been previously detected among koalas. Queensland koalas displayed high mitochondrial haplotype diversity (H = 0.753) and nucleotide diversity (π = 0.0072), indicating along with the microsatellite data that North American zoos have maintained high levels of genetic diversity among their Queensland koalas.
Mini-acoustic sensors reveal occupancy and threats to koalas (Phascolarctos cinereus) in private native forests
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Data from: Koalas (Phascolarctos cinereus) from Queensland are genetically distinct from 2 populations in Victoria
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Data from: Fresh Is best: accurate SNP genotyping from koala scats
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Susceptibility to a sexually transmitted disease in a wild koala population shows heritable genetic variance but no inbreeding depression
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Data from: Climate‐driven shifts in the distribution of koala browse species from the Last Interglacial to the near future
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Koala methylomes reveal divergent and conserved DNA methylation signatures of X chromosome regulation
GEO Series GSE149600. Phascolarctos cinereus. 10 samples. Type: Methylation profiling by high throughput sequencing.
The trajectory of KoRV-A Evolution Indicates Initial Integration into the Koala Germline Genome Near Coffs Harbour [Adelaide RNA-seq]
GEO Series GSE282118. Phascolarctos cinereus. 12 samples. Type: Expression profiling by high throughput sequencing.
The piRNA Response to Retroviral Invasion of the Koala Genome
GEO Series GSE128122. Mus musculus; Phascolarctos cinereus. 31 samples. Type: Expression profiling by high throughput sequencing; Non-coding RNA profiling by high throughput sequencing; Other.
The trajectory of KoRV-A Evolution Indicates Initial Integration into the Koala Germline Genome Near Coffs Harbour [Adelaide DNA-seq]
GEO Series GSE282117. Phascolarctos cinereus. 10 samples. Type: Other.
Centromeric chromatin in Koala
GEO Series GSE111153. Phascolarctos cinereus. 3 samples. Type: Genome binding/occupancy profiling by high throughput sequencing.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.