Journal articles on the topic 'Common ringtail possums'
To see the other types of publications on this topic, follow the link: Common ringtail possums.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Common ringtail possums.'
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.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Kerle, J. A., C. Kimmorley, and J. M. Old. "An inland population of the common ringtail possum (Pseudocheirus peregrinus) at Black Rock Ridge, New South Wales: a preliminary ecological assessment." Australian Mammalogy 35, no. 2 (2013): 236. http://dx.doi.org/10.1071/am12047.
Full textAbstract:
The common ringtail possum (Pseudocheirus peregrinus) is considered abundant throughout its distribution in eastern Australia but appears to be declining at a regional level in inland New South Wales. Previous studies of the common ringtail possum in south-eastern Australia have focussed on coastal populations and little is known about the ecology of inland populations. In south-western Australia studies of the closely related western ringtail possum (Pseudocherius occidentalis) have found that coastal populations differ from inland populations, particularly in their nesting behaviour. In this preliminary study of an inland population of the common ringtail possum at Black Rock Ridge in central west New South Wales population density has been estimated and the habitat and nesting preference assessed. Up to one ringtail per hectare and 4.5 ringtails per spotlight hour were recorded. Tree hollows appeared to be the preferred nest site, with possums seen entering hollows during spotlighting and no dreys being located. Threats to common ringtail possums at Black Rock Ridge include the isolation of the remnant ridge vegetation within an extensively cleared landscape and the associated change in fire regimes. Within this landscape there has been an extensive reduction in available habitat, and an overall lack of habitat connectivity has placed ringtail possums at an increased risk of predation.
2
Giffney, R. A., T. Russell, and J. L. Kohen. "Age of road-killed common brushtail possums (Trichosurus vulpecula) and common ringtail possums (Pseudocheirus peregrinus) in an urban environment." Australian Mammalogy 31, no. 2 (2009): 137. http://dx.doi.org/10.1071/am09016.
Full textAbstract:
Road-associated mortality has been identified as having major ecological effects on small, fragmented and declining populations. Both the common brushtail possum (Trichosurus vulpecula) and common ringtail possum (Pseudocheirus peregrinus) appear to be in decline in some regions across their natural ranges. Urban populations may be an exception; however, little is known of their population ecology. This study investigates age trends in a subset of road-killed brushtail and ringtail possums collected along eight northern Sydney roads between March 2004 and March 2006. From a total of 591 recorded road-killed possums, 86 were collected for use in this study (36 brushtails, 50 ringtails). Age was estimated using tooth wear patterns on cleaned skulls. Both species showed trends associated with age, and younger possums of both species were more likely to be killed on roads than older animals. Male-biased dispersal of subadult possums is considered a major contributing factor to the over-representation of young brushtail possums in this road-kill sample.
3
Russell, Tracey C., Catherine A. Herbert, and James L. Kohen. "High possum mortality on urban roads: implications for the population viability of the common brushtail and the common ringtail possum." Australian Journal of Zoology 57, no. 6 (2009): 391. http://dx.doi.org/10.1071/zo09079.
Full textAbstract:
Animal–vehicle collisions impact wildlife populations and in the northern suburbs of Sydney, both the common brushtail possum (Trichosurus vulpecula) and the common ringtail possum (Pseudocheirus peregrinus) are killed in large numbers. Over a two-year period almost 600 road-killed possums were observed from 217 road surveys covering over 7800 km, equating to 5.45 possums per week over the 36-km study area. Surveys were conducted along roads where the environment ranged from low-rise suburban to continuous sclerophyll forest. Significantly more ringtail possums were observed as road-kill, outnumbering brushtail possums by almost three to one. No sex bias was found amongst road-killed ringtail possums; however, seasonal trends and weight fluctuations were significant, with both males and females being at their lowest weights during the autumn breeding season. For brushtail possums a bias towards young males was observed. Sex and weight of road-killed brushtail possums were comparable to live-trap data from a previous study in the same location. In areas of such high possum mortality, wildlife managers may need to take action to mitigate possum road-kill.
4
Hermsen, Eden, Anne Kerle, and Julie M. Old. "Diet of an inland population of the common ringtail possum (Pseudocheirus peregrinus)." Australian Mammalogy 38, no. 1 (2016): 130. http://dx.doi.org/10.1071/am15008.
Full textAbstract:
Populations of the common ringtail possum (Pseudocheirus peregrinus) in inland New South Wales have declined or disappeared. Habitat requirements and diet of these populations are poorly understood. Determining the diet of inland ringtail possums is crucial to understanding the factors limiting their survival, and was the focus of this study. Spotlighting surveys were conducted to locate ringtail possums, and scat and vegetation samples were collected for microhistological analysis. Ringtail possums were most frequently observed in red stringybark followed by bundy box and black cypress pine trees, and this correlated with the most common dietary items consumed.
5
Hume, ID, E. Jazwinski, and TF Flannery. "Morphology and Function of the Digestive-Tract in New Guinean Possums." Australian Journal of Zoology 41, no. 1 (1993): 85. http://dx.doi.org/10.1071/zo9930085.
Full textAbstract:
The digestive tracts of preserved specimens of six species of New Guinean pseudocheirid (ringtail) possums (body mass 148-1250 g) and four species of New Guinean phalangerids (cuscuses) (730-2400 g) were compared. A preliminary study on Australian common ringtail possums (Pseudocheirus peregrinus) suggested that, within certain limits, data from preserved material were applicable to fresh specimens. The New Guinean ringtails were primarily folivorous, but the diet of the two smallest species contained more non-leaf material and was of higher quality, on the basis of higher (P<0.05) nitrogen levels in their gastric contents. Like P. peregrinus, New Guinean ringtail possums selectively retain fine feed particles and bacteria in their caecum, and may also be caecotrophic. The New Guinean phalangerids are less specialised in their diets, taking a wide range of leaves, bark and fruits. There was no evidence for caecotrophy or selective retention of bacteria in their caecum, but there was evidence for selective retention of fine feed particles. In the latter characteristic they differ from the Australian phalangerid Trichosurus vulpecula (the common brushtail possum).
6
Lavazanian, E., R. Wallis, and A. Webster. "Diet of powerful owls (Nixox strenua) living near Melbourne, Victoria." Wildlife Research 21, no. 6 (1994): 643. http://dx.doi.org/10.1071/wr9940643.
Full textAbstract:
The diet of powerful owls (Ninox strenua) living at Christmas Hills, 35 km north-east of Melboume, was examined by analysis of 686 regurgitated pellets collected over two years. Mammalian prey was found in 89%, insects in 13%, vegetation in 11% and birds in 10% of the pellets. Of the mammals, common ringtail possums occurred most frequently in the pellets over the year. There was no seasonal difference in the frequency of occurrences of common ringtail possums and sugar gliders in pellets. However, common brushtail possums were more likely to be taken in spring than in the other seasons. More adult common ringtail possums were taken as prey than were other age classes over the year, except in summer when high numbers of young were consumed by the owls.
7
Russell, B. G., Barbara Smith, and M. L. Augee. "Changes to a population of common ringtail possums (Pseudocheirus peregrinus) after bushfire." Wildlife Research 30, no. 4 (2003): 389. http://dx.doi.org/10.1071/wr01047.
Full textAbstract:
Following bushfires in Sydney in 1994 a population of 20–30 common ringtail possums (Pseudocheirus peregrinus) that had been studied for four years was reduced to only one or two animals. In the intervening years population numbers remained at this low level. Four years after the fire, 22 ringtail possums were introduced into the study site and radio-tracked for 30 weeks. Nest usage shifted from predominantly dreys before the fire to an equal amount of time spent in dreys and tree hollows. Proportionally, the mortality due to predation by lace monitors (Varanus varius) and diamond pythons (Morelia spilota spilota) increased. Within 12 months the population returned to only two animals. We conclude that increased predation by native predators, added to continued predation by foxes and cats, has maintained a level of predation beyond a threshold that would allow the ringtail population to re-establish to previous levels.
8
Phillips, D. J., A. McKinnon, T. Keeley, and S. D. Johnston. "Testosterone secretion, testicular histology and the cryopreservation of cauda epididymidal spermatozoa in the common ringtail possum (Pseudocheirus peregrinus)." Reproduction, Fertility and Development 20, no. 3 (2008): 391. http://dx.doi.org/10.1071/rd07206.
Full textAbstract:
The present study reports novel aspects of the reproductive biology of the male common ringtail possum (Pseudocheirus peregrinus). Plasma testosterone was measured through a stimulation test using the gonadotrophin-releasing hormone agonist, buserelin. Following intra-muscular administration of buserelin, there was an increase (P < 0.05) in testosterone concentration in the peripheral circulation 4 h later. Quantitative testicular histology of this species was described for the first time. Eight stages of the seminiferous epithelium cycle were identified in 10 possums and their relative frequency determined. Spermatozoa were recovered from the cauda epididymides of hemi-castrated possums and cryopreservation conducted in straws (6°C min–1) using final glycerol concentrations ranging between 2 and 20% in Tris-citrate egg yolk extender (v/v). Frozen straws were thawed and post-thaw motility, rate of motility, the percentage of live–dead spermatozoa and the percentage of sperm with swollen decondensed nuclei recorded. Similar to other marsupial sperm, common ringtail possum cauda epididymidal spermatozoa required high levels of glycerol (10–16%) in order to maintain post-thaw viability.
9
Sangster, C. R. "Multisystemic Listeriosis in a Common Brushtail Possum (Trichosurus vulpecula) and Two Common Ringtail Possums (Pseudocheirus peregrinus)." Veterinary Pathology 53, no. 3 (July 27, 2015): 677–81. http://dx.doi.org/10.1177/0300985815594851.
Full text
10
Crowe, Olivia, and Ian D. Hume. "Morphology and Function of the Gastrointestinal Tract of Australian Folivorous Possums." Australian Journal of Zoology 45, no. 4 (1997): 357. http://dx.doi.org/10.1071/zo97004.
Full textAbstract:
Museum specimens of seven Australian Pseudocheiridae (ringtail possums and greater glider) and six Australian Phalangeridae (brushtail possums and cuscuses) were examined to assess the extent of possible differences in gastrointestinal tract morphology and function within and between these two families of Australian folivorous possums. Although there were no differences between the two families in gut segment lengths, the Pseudocheiridae had less relative tissue mass in the small intestine (P < 0·05) and greater relative tissue mass in the caecum (P < 0·05) than the Phalangeridae. Total nitrogen concentrations of stomach, caecum and proximal colon digesta were greater in the Pseudocheiridae than in the Phalangeridae (P < 0·05), but in the distal colon they were similar. These differences suggest that the colonic separation mechanism previously documented in two pseudocheirid species is probably characteristic of the family Pseudocheiridae, but not of the Phalangeridae. They also reflect the more folivorous nature of the Pseudocheiridae, as leaves are generally higher than fruit in total nitrogen concentration. Among members of the Phalangeridae, there were no significant differences in any of the parameters measured, and it is concluded that the digestive strategy of the common brushtail possum (Trichosurus vulpecula) is probably representative of the family. In contrast, there were several notable differences among members of the Pseudocheiridae, indicating that the common ringtail possum (Pseudocheirus peregrinus) is not representative of all pseudocheirids. In particular, the digestive strategy of the rock ringtail possum (Petropseudes dahli) should be examined in relation to its unusual habitat, to its relatively simple caecum, and to the unusually low nitrogen concentrations found throughout its gastrointestinal tract.
11
Marsh, Karen J., Ian R. Wallis, and William J. Foley. "The effect of inactivating tannins on the intake of Eucalyptus foliage by a specialist Eucalyptus folivore (Pseudocheirus peregrinus) and a generalist herbivore (Trichosurus vulpecula)." Australian Journal of Zoology 51, no. 1 (2003): 31. http://dx.doi.org/10.1071/zo02055.
Full textAbstract:
The paucity of evidence on eucalypt browsing by common brushtail and common ringtail possums suggests that ringtails preferentially eat foliage from trees within the subgenus Monocalyptus. In contrast, brushtails eat less eucalypt foliage than do ringtails and prefer trees from the subgenus Symphyomyrtus. Trees from these subgenera differ in their defensive chemicals. Both contain tannins but it appears that only the symphyomyrts synthesise formylated phloroglucinol compounds (FPCs). We fed possums foliage from several individual Eucalyptus rossii and E. consideniana, both monocalypts, to avoid the confounding factor of FPCs, and examined the effects of blocking tannins by dipping foliage in polyethylene glycol (PEG). Ringtails and brushtails differed in their abilities to eat foliage from these eucalypts. The ringtails ate much more than did the brushtails and showed a small (about 10%) but significant increase in feeding in response to PEG. The brushtails were reluctant to eat foliage from either eucalypt species but doubled their intake when leaves were coated with PEG. Even so, they still did not eat enough to meet maintenance requirements for energy and nitrogen. Neither ringtails nor brushtails preferred foliage from any individual E. rossii tree, suggesting that all trees were equally defended. However, brushtails preferred foliage from some E. consideniana to others. Monocalypt tannins are clearly important barriers to feeding in brushtail possums, but further research with higher doses of PEG will confirm whether they are the only deterrent chemicals in monocalypt foliage.
12
Clark, P., and P. Holz. "Haematological characteristics of common ringtail possums ( Pseudocheirus peregrinus ) with bite injuries." Comparative Clinical Pathology 12, no. 3 (November 1, 2003): 166–68. http://dx.doi.org/10.1007/s00580-003-0494-y.
Full text
13
Harper, Michael J., Michael A. McCarthy, and Rodney van der Ree. "The use of nest boxes in urban natural vegetation remnants by vertebrate fauna." Wildlife Research 32, no. 6 (2005): 509. http://dx.doi.org/10.1071/wr04106.
Full textAbstract:
Nest boxes are routinely installed as a substitute for natural tree hollows to provide den and nest sites for a range of hollow-utilising fauna. We installed 120 nest boxes in 20 patches of indigenous vegetation (remnants) across the urban/suburban landscape of Melbourne, south-eastern Australia, and investigated their use by indigenous and exotic vertebrate species over a period of 12 months. Nest-box use was dominated by the common brushtail possum (Trichosurus vulpecula), the common ringtail possum (Pseudocheirus peregrinus) and the common myna (Acridotheres tristis), an aggressive introduced bird. We found that brushtail and ringtail possums utilised nest boxes all year round but more frequently in cooler months (May–August). Common mynas dominated nest-box use during spring/summer, potentially reducing the availability of this resource to indigenous species. We found evidence that the probability of a nest box being occupied by either species of possum was greater in remnants with abundant possum populations. Brushtail possums preferred thick-walled pine nest boxes over thin-walled plywood nest boxes, most likely owing to differences in their thermal insulation properties. Although considerable economic costs would be involved in using nest boxes as a long-term substitute for hollow-bearing trees, nest boxes may provide a temporary hollow resource until hollow-bearing trees are recruited in urban remnants.
14
Munks, SA, B. Green, K. Newgrain, and M. Messer. "Milk-Composition in the Common Ringtail Possum, Pseudocheirus-Peregrinus (Petauridae, Marsupialia)." Australian Journal of Zoology 39, no. 4 (1991): 403. http://dx.doi.org/10.1071/zo9910403.
Full textAbstract:
Milk samples were collected from captive common ringtail possums, Pseudocheirus peregrinus, throughout lactation and from free-living animals during phase 3 of lactation (weeks 15-30 post partum). Both field and captive animals lactated for approximately 30 weeks. In comparison with the milks of other marsupial species, ringtail possum milk was relatively dilute and low in lipid. During phase 2 of lactation (up to week 14) solids represented around 16% (w/w), comprising mostly carbohydrate and protein, increasing to 25% (w/w) at the onset of pouch emergence. During the period of pouch vacation (weeks 15-18) the carbohydrate concentration declined and protein and lipid concentrations peaked. Sodium and potassium concentrations throughout lactation were around 25 mm and 22 mm respectively. Calcium and magnesium levels were around 1.8 g per L and 131 mg per L respectively. Milk carbohydrates consisted mainly of oligosaccharides during phase 2 of lactation and these were replaced by the disaccharide lactose during phase 3 of lactation. The pattern of change in the composition of ringtail possum milk during phase 2 was similar to that shown by those of other marsupials, but during phase 3 the milk had higher levels of carbohydrate and lower levels of lipid than that of other marsupials. Differences in the composition of milk from free-living and captive animals suggest that diet composition may affect the concentration of milk protein and milk fat within a species.
15
Blasdell, Kim R., Bridgette McNamara, Daniel P. O’Brien, Mary Tachedjian, Victoria Boyd, Michael Dunn, Peter T. Mee, et al. "Environmental risk factors associated with the presence of Mycobacterium ulcerans in Victoria, Australia." PLOS ONE 17, no. 9 (September 13, 2022): e0274627. http://dx.doi.org/10.1371/journal.pone.0274627.
Full textAbstract:
In recent years reported cases of Buruli ulcer, caused by Mycobacterium ulcerans, have increased substantially in Victoria, Australia, with the epidemic also expanding geographically. To develop an understanding of how M. ulcerans circulates in the environment and transmits to humans we analyzed environmental samples collected from 115 properties of recent Buruli ulcer cases and from 115 postcode-matched control properties, for the presence of M. ulcerans. Environmental factors associated with increased odds of M. ulcerans presence at a property included certain native plant species and native vegetation in general, more alkaline soil, lower altitude, the presence of common ringtail possums (Pseudocheirus peregrinus) and overhead powerlines. However, only overhead powerlines and the absence of the native plant Melaleuca lanceolata were associated with Buruli ulcer case properties. Samples positive for M. ulcerans were more likely to be found at case properties and were associated with detections of M. ulcerans in ringtail possum feces, supporting the hypothesis that M. ulcerans is zoonotic, with ringtail possums the strongest reservoir host candidate. However, the disparity in environmental risk factors associated with M. ulcerans positive properties versus case properties indicates the involvement of human behavior or the influence of other environmental factors in disease acquisition that requires further study.
16
Pahl, LI. "Survival, Age-Determination and Population Age Structure of the Common Ringtail Possum, Pseudocheirus-Peregrinus, in a Eucalyptus Woodland and a Leptospermum Thicket in Southern Victoria." Australian Journal of Zoology 35, no. 6 (1987): 625. http://dx.doi.org/10.1071/zo9870625.
Full textAbstract:
Juvenile ringtail possums in two populations were aged by comparison with growth curves based on head length and body weight, and adults were aged by comparing the degree of tooth wear with that of ringtails of known age. Survival to the end of pouch life, 3 months old, appeared high but dropped markedly thereafter. During years of 'average' rainfall, 26-80% of all offspring lived to the age of weaning (6 months), but as few as 6% survived to weaning in a year of drought. Approximately 30% survived to sexual maturity (1 year) during years of 'average' rainfall, compared with 2% during a drought. Survival of adult females was higher than that of adult males, and ringtails at Sandy Point (Leptospermum thicket) appeared to survive longer than ringtails at Lysterfield (Eucalyptus woodland). The lower survival of adult ringtails at Lysterfield was associated with higher rates of tooth wear, possibly due to their more abrasive diet, but may have also been influenced by the hotter climate at Lysterfield. The lower survival of ringtails at Lysterfield resulted in a population with a greater proportion of 1-year-old animals than in the Sandy Point population.
17
Chilcott, MJ, and ID Hume. "Coprophagy and Selective Retention of Fluid Digesta: Their Role in the Nutrition of the Common Ringtail Possum, Pseudocheirus Peregrinus." Australian Journal of Zoology 33, no. 1 (1985): 1. http://dx.doi.org/10.1071/zo9850001.
Full textAbstract:
In ringtail possums, Pseudocheirus peregrinus, fed a sole diet of Eucalyptus andrewsii foliage the mean retention time of the fluid marker 51Cr-EDTA in the gut (63 � 2 h) was longer (P< 0.002) than that of the particulate marker 103Ru-phenanthroline (35 � 2 h), indicating selective retention of fluid digesta in the caecum. In addition, the ringtail was observed to be coprophagic. The form of coprophagy was determined to be caecotrophy; hard faeces produced during the dark (foraging) phase were not eaten, but soft faeces produced during the light (resting) phase were taken directly from the cloaca. Soft faeces, collected when coprophagy was prevented by a plastic collar, were high in water and nitrogen content, and low in fibre relative to hard faeces. Coprophagy contributed 254 kJ.kg-0.75.d-� to total energy intake (equivalent to 58% of digestible energy intake), and 570 mg nitrogen per kg-0.75per day, twice the main- tenance nitrogen requirement. It was concluded that coprophagy was an important factor in explaining the ringtail possum's low requirement for nitrogen and its ability to subsist on a sole diet of Eucalyptus foliage.
18
Wallis, I. R., and W. J. Foley. "Validation of near-infrared reflectance spectroscopy to estimate the potential intake of Eucalyptus foliage by folivorous marsupials." Australian Journal of Zoology 51, no. 1 (2003): 95. http://dx.doi.org/10.1071/zo02027.
Full textAbstract:
We validated an existing model of food intake by captive common ringtail possums (Pseudocheirus peregrinus), a folivorous marsupial, by feeding foliage from 18 individual Eucalyptus polyanthemos trees and measuring dry matter intake. Near-infrared reflectance (NIR) spectra of a sample of each foliage were recorded and compared against a previously derived model relating food intake in common ringtails and NIR spectra. We found excellent agreement between the predicted and measured food intake, with the standard error of prediction being 3.6 g kg(body mass)–0.75 day–1. NIR spectroscopy is a suitable tool for modelling complex attributes such as potential feeding rates of mammals. This makes it theoretically possible to remotely sense critical nutritional determinants of animal habitat on a landscape scale.
19
Hume, ID, RV Bladon, and N. Soran. "Seasonal Changes in Digestive Performance of Common Ringtail Possums (Pseudocheirus Peregrinus) Fed Eucalyptus Foliage." Australian Journal of Zoology 44, no. 4 (1996): 327. http://dx.doi.org/10.1071/zo9960327.
Full textAbstract:
Digestive performance of common ringtail possums (Pseudocheirus peregrinus) offered the foliage of Eucalyptus punctata or E. haemastoma was compared in summer and winter. In summer, possums offered E. punctata digested a greater proportion of ingested dry matter, energy, fibre and nitrogen, and remained in positive nitrogen balance, compared with those offered E. haemastoma, which were in slight negative nitrogen balance. In winter, performance on E. punctata was generally similar to that in summer. In contrast, on E. haemastoma in winter, intake of foliage was 24% higher than that of summer foliage and apparent digestibility of energy was 20% higher so that intake of digestible energy was 73% higher, and animals were in strong positive nitrogen balance. Consequently, winter performance measures were nearly all significantly higher on E. haemastoma than on E. punctata. These findings are discussed in terms of me higher nutritive value of young versus mature leaves and the different responses of the two eucalypt species to unusual seasonal conditions. The results demonstrate that seasonal changes in animal performance on eucalypt foliage can be marked, but cannot be used to predict performance in any future year.
20
Belcher, CA. "Diet of the tiger quoll (Dasyurus maculatus)." Wildlife Research 22, no. 3 (1995): 341. http://dx.doi.org/10.1071/wr9950341.
Full textAbstract:
The diet of the tiger quoll (Dasyurus maculatus) in East Gippsland, Victoria, was investigated by systematically collecting scats from two latrines between December 1990 and May 1993. From the analysis of these scats, the tiger quoll was found to be a predator of vertebrate prey, largely dependent on mediumsized mammals (500 g to 5 kg). The most important prey species were the European rabbit, the common brushtail possum and the common ringtail possum. Other prey included Antechinus species, bush rats, echidnas, macropods, wombats, birds, invertebrates and reptiles. Some variation in diet occurred between seasons, due to seasonal availability of prey. A shift in diet detected between years was attributed to the variation in rainfall and the effect this had on prey species abundance. Significant differences in diet were found between adult and subadult tiger quolls. Subadult quolls consumed significantly more small mammals, ringtail possums, invertebrates and reptiles and significantly fewer rabbits than did adult quolls. Further analysis of the tiger quolls' diet, by estimating the mass contribution of prey taxa to the diet, revealed that medium-sized prey contributed more than 80% of the biomass of prey consumed.
21
Russell, Tracey C., Catherine A. Herbert, James L. Kohen, and Des Cooper. "The incidence of road-killed possums in the Ku-ring-gai area of Sydney." Australian Journal of Zoology 61, no. 1 (2013): 87. http://dx.doi.org/10.1071/zo12118.
Full textAbstract:
The spatial and temporal incidence of possum mortality on roads was monitored in Sydney’s northern suburbs over a two-year period. In total, 217 road surveys were completed, equating to over 17 000 km travelled. Almost 600 possums were observed as road-kill, with common ringtail possums (Pseudocheirus peregrinus) encountered in 87% of surveys and almost three times as often as common brushtail possums (Trichosurus vulpecula) (encountered in 52% of surveys). Roads were classified into three categories based on adjacent landscape attributes, with the road-side environment ranging from suburban housing to continuous sclerophyll forest. Clusters, or ‘hot spots’, for possum road-kill were identified using GIS. Most possum fatalities, and five out of six hot spots, occurred along roads at the bush–urban interface, suggesting high possum movement rates and/or abundance at these sites. Continuous canopy across the road was available along only 4% of the roads surveyed, forcing these arboreal marsupials to cross roads via electricity wires or at ground level, making them vulnerable to collision with vehicles. In an attempt to mitigate the possum road toll, two rope tunnel bridges were erected at canopy level above the most consistent hot spot. Subsequent monitoring of the roads was undertaken for 10 months after erection of the canopy bridge and road-kill numbers declined significantly at the site of the bridges, but also at adjacent sites throughout the study area.
22
Wayne, A. F., A. Cowling, J. F. Rooney, C. G. Ward, I. B. Wheeler, D. B. Lindenmayer, and C. F. Donnelly. "Factors affecting the detection of possums by spotlighting in Western Australia." Wildlife Research 32, no. 8 (2005): 689. http://dx.doi.org/10.1071/wr04089.
Full textAbstract:
This paper describes how environmental factors, survey method procedures and differences in forest structure resulting from logging relate to the detection of koomal (common brushtail possum, Trichosurus vulpecula hypoleucus) and ngwayir (western ringtail possum, Pseudocheirus occidentalis). A total of 169 vehicle-based spotlight surveys of possums within native jarrah (Eucalyptus marginata) forest was conducted on three transects over eight years (1996–2003). Up to 5.7 koomal and up to 3.3 ngwayir were detected per kilometre per transect side. Only one ngwayir was detected during the eight surveys conducted between 2001 and 2003. More koomal were seen in spring and autumn (i.e. September–November and March–May respectively) and more ngwayir were seen between October and April. Although surveys were not conducted on very rainy or excessively windy nights, fewer possums were nonetheless seen on nights following rainy days and on cold nights. Cloud cover also affected sightings of koomal. The time taken to complete the surveys increased in conjunction with the number of possums detected, on account of the time required to record data. The importance of standardising travelling speed also is emphasised. Possum spotlight counts differed between recently logged and unlogged areas. However, these findings were not supported by complementary koomal abundance estimates derived from trapping, suggesting that vegetation structure may affect detectability. Factors such as the lunar cycle, wind speed and survey start time after sunset did not significantly affect detection rates of either species. On the basis of these findings, specific survey conditions can be selected to improve spotlight detection efficiency.
23
Inions, GB, MT Tanton, and SM Davey. "Effect of Fire on the Availability of Hollows in Trees Used by the Common Brushtail Possum, Trichosurus Vulpecula Kerr, 1792, and the Ringtail Possum, Pseudocheirus Peregrinus Boddaerts, 1785." Wildlife Research 16, no. 4 (1989): 449. http://dx.doi.org/10.1071/wr9890449.
Full textAbstract:
Characteristics of trees used for shelter during the day by brushtail and ringtail possums were identified in a study in open forest dominated by Eucalyptus marginata and E. calophylla in the Perup Fauna Nature Reserve, SW Western Australia. The effect of high-intensity fire on the availability of trees used by the possums was studied by comparing a burnt area (36 ha) with an unburnt area (22 ha) one and 32 months after the fire. Suitable hollows were used by possums regardless of the species, condition, height or size of the tree. Hollows deeper than 1 m were used significantly more frequently than shallow ones. Hollows of suitable size appear to develop in E. marginata when trees reach a mean age of about 300 yr, and in E. calophylla when trees reached a mean age of about 200 yr. The average age of trees inhabited by possums could be as high as 500 yr for E. marginata and 400 yr for E. calophylla. About 3 trees/ha were used by possums for diurnal refuge; the distribution of these trees was random. Fire of high intensity (1000-1400 kW/m) destroyed 38% of the trees previously inhabited by possums; the damage to other inhabited trees was related to their condition and the intensity of fire. In the longer term, high-intensity fire increased the rate of formation of hollows by direct excavation or by providing new sites for fungal and termite infestation. Thirty-two months after the fire, the average age of trees containing suitable hollows was estimated to be about 100 yr less than before the fire because of the destruction of older trees and the formation of new hollows, or the deepening of existing ones, in younger trees.
24
Fulton, Graham R. "Owl survey of the Peel–Harvey Estuary in south-western Australia." Australian Journal of Zoology 65, no. 2 (2017): 71. http://dx.doi.org/10.1071/zo17027.
Full textAbstract:
Little is known of owls in south-western Australia compared with the owls of southern and eastern Australia. Surveys of forest owls in the south-west are almost completely lacking. This study sought to determine the abundance and detectability of owls immediately around the Peel–Harvey Estuary in south-western Australia. The southern boobook (Ninox boobook) and the masked owl (Tyto novaehollandiae) were the only owls detected (n = 23 and n = 1 respectively), although the nocturnal tawny frogmouth (Podargus strigoides) was detected from unelicited calls on three occasions. Southern boobooks were found to be common in this area though they are reported to be in decline in south-eastern and inland Australia. Their detectability was significantly greater in August (late winter) than at other times through unelicited calls; otherwise, there were no detections in winter. A variety of small mammals were detected during the surveys, including: a little red flying-fox (Pteropus scapulatus), a western ringtail possum (Pseudocheirus occidentalis), 19 southern brown bandicoots (Isoodon obesulus), 4 common brushtail possums (Trichosurus vulpecula), 21 rabbits (Oryctolagus cuniculus), a black rat (Rattus rattus), 2 red foxes (Vulpes vulpes) and 22 microbats.
25
Wayne, A. F., A. Cowling, C. G. Ward, J. F. Rooney, C. V. Vellios, D. B. Lindenmayer, and C. F. Donnelly. "A comparison of survey methods for arboreal possums in jarrah forest, Western Australia." Wildlife Research 32, no. 8 (2005): 701. http://dx.doi.org/10.1071/wr04094.
Full textAbstract:
Comparative trials of different survey methods were conducted in the southern jarrah (Eucalyptus marginata) forest to determine the most efficient means of detecting koomal (common brushtail possum, Trichosurus vulpecula hypoleucus) and ngwayir (western ringtail possum, Pseudocheirus occidentalis). In particular, we examined different trapping and spotlighting methods and compared these with scat surveys. Six different trapping methods (derived by combining three bait types and two trap positions) were compared at six sites. Significantly fewer koomal were caught on ‘universal’ bait (i.e. peanut butter, rolled oats and sardines) than on flour-based baits using rose oil or Eucalyptus oil as lures. Significantly more individuals of both possum species were caught in arboreal traps than in ground traps (P < 0.001 in both cases). Recapture rates of koomal were high, whereas ngwayir were rarely retrapped. There were no detection differences between six different spotlighting methods (derived by combining three spotlight intensities with two filter colours) for koomal. Significantly more ngwayir were detected using 50-W or 100-W lights than 20-W lights (P = 0.01). There were no significant differences in the detection rates for ngwayir using red or white light. There were, however, significant observer differences in the number of possums of both species detected (koomal, P = 0.025; ngwayir, P = 0.004). Spotlighting detected, on average, only 4.9% of the koomal ‘known to be alive’ by trapping. However, spotlighting with a 50-W or 100-W spotlight detected more ngwayir than did trapping. Koomal abundance measures derived from scat surveys were not related to trapping or spotlight abundance estimates. For ngwayir, however, scat counts were strongly related to spotlight counts and there were no significant observer differences for the former. We conclude that koomal are more effectively surveyed using arboreal trapping with rose or Eucalyptus lures. Ngwayir are best surveyed using scat surveys or 50-W spotlights.
26
Emerson, Luke D., Guy-Anthony Ballard, and Karl Vernes. "Conventional distance sampling versus strip transects and abundance indices for estimating abundance of greater gliders (Petauroides volans) and eastern ringtail possums (Pseudocheirus peregrinus)." Wildlife Research 46, no. 6 (2019): 518. http://dx.doi.org/10.1071/wr18155.
Full textAbstract:
Abstract ContextAccurate estimates of abundance are extremely useful for wildlife management and conservation. Estimates generated from distance sampling are typically considered superior to strip transects and abundance indices, as the latter do not account for probability of detection, thereby risking significant error. AimTo compare density estimates generated from conventional distance sampling (CDS) of arboreal marsupials with strip transect density estimates and abundance indices. MethodsOff-track CDS and strip transects were used to estimate densities of P. volans and P. peregrinus across ~2.6km2 of remnant eucalypt forest at Mt Duval in north-eastern New South Wales. Key resultsCDS density estimates for P. volans (1.36ha−1, 95% confidence interval (CI) of 1.07–1.72ha−1) and P. peregrinus (0.28ha−1, 95% CI 0.22–0.35ha−1) were consistent with densities reported in other studies conducted in open eucalypt forests. A strip transect width of 40m for P. volans resulted in a collective set of values for density (1.35ha−1), error (s.e.±0.14), precision (cv 0.10) and 95% CI (1.07–1.62ha−1) closest to those associated with the CDS-generated density estimate (1.36ha−1, s.e.±0.15, cv 0.10, 95% CI 1.07–1.72ha−1). Strip widths of 10 to 40m resulted in density estimates for P. peregrinus closest to those generated through CDS, but much less precise. ConclusionsAlthough a 40-m wide strip transect provided a robust density estimate for P. volans at Mt Duval, this is unlikely to be consistent across different study areas. Strip transects provided less precise density estimates, or underestimated P. peregrinus density at Mt Duval, when compared with CDS density estimates. CDS should be favoured over strip transects or abundance indices for estimating P. volans and P. peregrinus abundance, because it is capable of providing more meaningful and robust abundance estimates by accounting for the probability of detection from the transect line across different habitats. ImplicationsResearchers, conservation managers and decision makers should be aware that common methods for assessing arboreal marsupial abundance have serious potential weaknesses. Thus, it would be prudent to invest in studies that address imperfect detection to improve the quality of monitoring data.
27
Dexter, Nick, and Andy Murray. "The impact of fox control on the relative abundance of forest mammals in East Gippsland, Victoria." Wildlife Research 36, no. 3 (2009): 252. http://dx.doi.org/10.1071/wr08135.
Full textAbstract:
Predation by European red foxes is believed to be the major cause of the extinction and decline of a large number of native medium-sized terrestrial mammals in Australia. We examined the impact of poisoning of foxes on the relative abundance of a group of medium-sized mammals in an experiment conducted in three large forest blocks in south-eastern Australia. The blocks consisted of paired sites, as follows: one site where poison baiting was used to control foxes (treatment site) and one where foxes were not controlled (non-treatment site). At all six sites, the population responses of a range of mammals were measured, and compared between treatment and non-treatment sites. The relative fox abundance, as indexed by bait-take, declined during the course of the study at treatment sites and to a lesser extent at non-treatment sites. The decline in bait-take at non-treatment sites was most likely due to treatment sites acting as ecological traps, so that reduced intra-specific competition attracted foxes from non-treatment to treatment sites, where they were subsequently poisoned. There was a significant treatment effect for the abundances of total mammals, long-nosed potoroos, southern brown bandicoots and common brushtail possums, with higher abundances at treatment sites than at non-treatment sites. Common ringtail possums increased in abundance during the course of the study, with no significant difference between treatment and non-treatment sites. There was no significant effect of time or treatment on the abundance of long-nosed bandicoots. The increase in the abundance of native mammals at treatment sites was most likely due to a lower predation pressure by foxes brought about by fox control, and the smaller increase in abundance in non-treatment blocks was likely due to the ecological-trap effect because of fox baiting at treatment sites. The present study demonstrated that broad-scale fox control can lead to increases in the abundance of native mammals in forested habitats, without recourse to aerial baiting or fences. The study also demonstrated that the influence of fox control on the fox abundance can extend well beyond the perimeter of the area baited.
28
Moore, Tracey, Paul de Tores, and Patricia A. Fleming. "Detecting, but not affecting, nest-box occupancy." Wildlife Research 37, no. 3 (2010): 240. http://dx.doi.org/10.1071/wr09111.
Full textAbstract:
Context. Nest boxes are a useful tool in the reintroduction, conservation and monitoring of many hollow-using species. Aims. All forms of nest-box monitoring involve some form of invasion, often upsetting their continued use by occupants. We conducted a pilot study to investigate and validate the innovative use of temperature dataloggers (iButtons®) to remotely monitor nest-box use, leaving the nest-box occupants untouched. Methods. In captivity, iButton recordings revealed the duration and time of day when each of the three nest-box designs was occupied by Pseudocheirus occidentalis (western ringtail possums); the accuracy of occupancy data was validated by unobtrusive infrared video recording. In the field, where translocated P. occidentalis and naturally occurring Trichosurus vulpecula (common brushtail possum) populations are present, hair sampling at the nest-box entrances (in addition to iButton recording) was used to identify the mammal species present. Key results. Nest-box use by captive P. occidentalis validated iButtons as a useful remote-monitoring tool, with <5–6% error for two nest-box designs. Although there was limited use of nest boxes at the field site, our results confirmed that iButtons are useful for remote-monitoring of nest-box use in the field; iButton data revealed both short (<2 h) and long (>10 h) periods of continuous occupancy (T. vulpecula only). In addition to the convenience (to researcher and animal) of continuous (24-h) monitoring with minimal disturbance, a major advantage from using iButtons is that occupancy can be matched with environmental temperature or rainfall records, as well as other events (e.g. storms or frost). Conclusions. iButtons are a useful remote-monitoring tool of nest boxes, and it is possible that their use in this manner may be extended to tree-hollow occupation. Most importantly, this approach can inform us as to the conditions under which the nest boxes are used by fauna, as well as preferences for different nest-box designs. Implications. It is important to note that the criteria used for determining the presence or absence in the nest box (i.e. temperature difference, Tin– Tout, of 2°C) in the present study will not be relevant for all nest-box designs and before using these methods, the thermal properties of the nest box or tree hollow will require investigation.
29
Pahl, LI, and AK Lee. "Reproductive Traits of 2 Populations of the Common Ringtail Possum, Pseudocheirus-Peregrinus, in Victoria." Australian Journal of Zoology 36, no. 1 (1988): 83. http://dx.doi.org/10.1071/zo9880083.
Full textAbstract:
Reproduction in the common ringtail possum in Victoria was seasonal, with the majority of births in late autumn and early winter, and late lactation and weaning occurring in late spring and early summer, when young foliage is most abundant. Births and lactation usually did not occur in late summer and early autumn, a time when many ringtails lost weight and some died, and a time when conditions were hot and dry. The age structure and weight of females in the population appeared to influence the timing of breeding and fecundity, but did not explain all the variation in these parameters observed within and between populations. Early breeding in one population appeared to be associated with a high proportion of multiparous females, resulting from high adult survival. Late breeding of primiparous females may have been due to their low body weights at the beginning of the birth season. Among the multiparous females, some produced litters earlier than others, but these females were not significantly heavier than those which bred later. During individual years, multiparous females which bred early in the season, and which were able to wean their first litter at 5 months old instead of the more typical 6 or 7 months, often produced a second litter in spring but were not heavier or older than multiparous females which bred only once in any one year. The higher frequency of second litters in 1982 than in 1981 at Sandy Point was associated with a higher body weight of females in November 1982.
30
Jones, BA, RA How, and DJ Kitchener. "A field study of Pseudocheirus occidentalis (Marsupialia : Petauridae) II. Population studies." Wildlife Research 21, no. 2 (1994): 189. http://dx.doi.org/10.1071/wr9940189.
Full textAbstract:
Field studies of the rare and endangered western ringtail possum (Pseudocheirus occidentalis) were undertaken at five main sites in south-western Australia. Population studies employing capture-markrelease and telemetry methods were concentrated at Abba River and Locke Estate, near Busselton, and supplementary telemetry records were obtained for three females at Yendicup, Perup, near Manjimup. The location of dreys and sightings were mapped at Geographe Bay (near Busselton) and Emu Point (Albany). Mature adults of both sexes weighed about 1000 g and attained maturity at 830-900 g. Young were estimated to spend about 104 days in the pouch and emerge at 130-150 g. Lactation ceased when young weighed 550-650 g. Most births were of single young, but at Locke 16.7% of females with pouch young carried twins. In the Busselton area some births occurred in all months, but there were few between December and March. Most births occurred during April-July, but a secondary peak occurred during September-November, especially at Locke. At Locke 69% of animals were females and this ratio was similar in all age classes, but at Abba the sex ratio was parity. At Locke hollows were rare and animals usually rested in dreys; at Abba hollows in Eucalyptus gomphocephala were the usual rest sites and dreys were rare, occurred only near the watercourse and were used only by males; at Yendicup no dreys were observed and hollows in eucalypts were the usual rest sites. Animals used 2-7 rest sites each. Home ranges of females at Yendicup averaged about 2.5 ha; in the Busselton area home ranges averaged less than 1 ha. Less than 1% of both day and night sightings were of animals at ground level. Plots of the location of dreys and sightings at three sites showed that possums were not evenly dispersed, and at two sites there were areas of apparently suitable habitat that were rarely used. Density was estimated for four sites: Abba River 3.7-4.3 ha-1, Locke Estate 2.4-4.5 ha-1, Geographe Bay 0.3-0.6 ha-1 and Emu Point 0.1-0.4 ha-1. Evidence of predation by foxes was found at Abba, Locke and Geographe Bay. Microscopic inspection of faecal pellets showed that, where Agonis flexuosa grew, its leaves accounted for 79-100% of diet. Small amounts of several other plants were also taken. At Perup A. flexuosa was absent and the diet consisted predominantly of leaves of the two common eucalypts (Eucalyptus calophylla and E. marginata).
31
Isaac, JL. "Possums: The Brushtails, Ringtails and Greater Glider. Anne Kerle. A Review by Joanne L Isaac." Australian Mammalogy 24, no. 2 (2002): 249. http://dx.doi.org/10.1071/am02249.
Full textAbstract:
DESPITE their almost ubiquitous presence across Australia, contemporary research on the biology, ecology and conservation status of the so-called 'common' possums is scant and inadequate. The majority of possum studies have been a result of the huge research effort in New Zealand to control and eradicate the common brushtail possum, a notorious introduced pest, and have concentrated primarily upon reproductive physiology. The conspicuous lack of ecological data on the larger possums across their native Australian range is particularly disturbing since evidence suggests that a number of these species are disappearing from large tracts of Australia. However, Possums: the brushtails, ringtails and greater glider, part of the Australian Natural History Series, provides a long overdue summary of up-to-date research on these familiar and intriguing marsupials.
32
McLean, Stuart, William J. Foley, Noel W. Davies, Susan Brandon, Li Duo, and Adrian J. Blackman. "Metabolic fate of dietary terpenes fromEucalyptus radiata in common ringtail possum (Pseudocheirus peregrinus)." Journal of Chemical Ecology 19, no. 8 (August 1993): 1625–43. http://dx.doi.org/10.1007/bf00982297.
Full text
33
De Angelis, David A. "Plant exudates: a previously unreported feature in the diet of the common ringtail possum." Ecology 98, no. 8 (May 5, 2017): 2219–20. http://dx.doi.org/10.1002/ecy.1839.
Full text
34
Pahl, LI. "Feeding-Behavior and Diet of the Common Ringtail Possum, Pseudocheirus-Peregrinus, in Eucalyptus Woodlands and Leptospermum Thickets in Southern Victoria." Australian Journal of Zoology 35, no. 5 (1987): 487. http://dx.doi.org/10.1071/zo9870487.
Full textAbstract:
The foliage of Eucalyptus spp. contributed 61-98% of the annual diet of ringtails at sites dominated by Eucalyptus spp. or prickly teatree, Leptospermum juniperinum. Up to 45% of the Eucalyptus foliage consumed was young, and young foliage was mostly eaten during spring and summer. The remainder of the diet consisted of foliage of several species of shrub and significant proportions of the diet of one population consisted of flowers and/or flower buds of Eucalyptus maculata during winter. The proportion of shrub foliage eaten was generally highest at sites dominated by less preferred Eucalyptus spp., such as E. tereticornis, E. camaldulensis and E. botryoides, compared to sites dominated by the favoured species, E. ovata, E. dives, and E. maculata. Ringtails in thickets of coast teatree, L. laevigatum, fed predominantly on foliage of that species. The proportions of Eucalyptus and shrub foliage eaten by different populations did not appear to be correlated with availability, suggesting that ringtails fed selectively from the foods available. Food selection was practised at four levels: between species, trees, leaves and leaf parts. Partly digested leaf material appeared to have been consumed by pouch young before they had begun to feed on foliage.
35
Obrien, TP, A. Lomdahl, and G. Sanson. "Preliminary Microscopic Investigations of the Digesta Derived From Foliage of Eucalyptus-Ovata (Labill) in the Digestive-Tract of the Common Ringtail Possum, Pseudocheirus-Peregrinus (Marsupialia)." Australian Journal of Zoology 34, no. 2 (1986): 157. http://dx.doi.org/10.1071/zo9860157.
Full textAbstract:
A method is described that stabilizes vacuolar tannins in unchewed leaves of Eucalyptus ovata. This method, with light microscopy and electron microscopy, was used to study the fate of digesta in the gut of the common ringtail possum Pseudocheirus peregrinus. Normal animals (fed fresh foliage and practising coprophagy) were compared with animals denied access either to fresh foliage or to soft faecal pellets in the week before they were killed. Both manipulations appear to disturb gut function and create a need for caution in interpreting the observations. Nonetheless the results demonstrate some tanning of leaf cytoplasts in the ringtail possum, but the quantitative significance of the dietary losses so incurred is difficult to estimate. Partial digestion of cell walls and tanned cytoplasts occurs in the caecum, where massive populations of micro-organisms become attached to digestion-resistant tissue components. These 'microbial rafts' are reingested as soft pellets by coprophagy and the bacteria largely digested.
36
Scheelings, T. F., J. L. Devi, A. P. Woodward, and T. Whittem. "Pharmacokinetics of enrofloxacin following oral and subcutaneous administration in the common ringtail possum (Pseudocheirus peregrinus )." Journal of Veterinary Pharmacology and Therapeutics 38, no. 5 (January 27, 2015): 482–87. http://dx.doi.org/10.1111/jvp.12201.
Full text
37
LANCASTER, MELANIE L., STEVEN J. B. COOPER, SUE CARTHEW, and ANDREA TAYLOR. "Microsatellite markers for the Common ringtail possum ( Pseudocheirus peregrinus ) and their amplification in other Pseudocheirids." Molecular Ecology Resources 9, no. 6 (October 12, 2009): 1535–37. http://dx.doi.org/10.1111/j.1755-0998.2009.02729.x.
Full text
38
Munks, Sarah Ann, and Brian Green. "Milk Consumption and Growth in a Marsupial Arboreal Folivore, the Common Ringtail Possum, Pseudocheirus peregrinus." Physiological Zoology 70, no. 6 (November 1997): 691–700. http://dx.doi.org/10.1086/515871.
Full text
39
Munks, S. A., and B. Green. "Energy allocation for reproduction in a marsupial arboreal folivore, the common ringtail possum (Pseudocheirus peregrinus)." Oecologia 101, no. 1 (January 1995): 94–104. http://dx.doi.org/10.1007/bf00328905.
Full text
40
McArthur, Clare, and G. D. Sanson. "Effects of tannins on digestion in the common ringtail possum (Pseudocheirus peregrinus), a specialized marsupial folivore." Journal of Zoology 225, no. 2 (October 1991): 233–51. http://dx.doi.org/10.1111/j.1469-7998.1991.tb03814.x.
Full text
41
Marsh, K. J., W. J. Foley, A. Cowling, and I. R. Wallis. "Differential susceptibility to Eucalyptus secondary compounds explains feeding by the common ringtail (Pseudocheirus peregrinus) and common brushtail possum (Trichosurus vulpecula)." Journal of Comparative Physiology B 173, no. 1 (January 18, 2003): 69–78. http://dx.doi.org/10.1007/s00360-002-0318-4.
Full text
42
Harding, Elaine K., and Shirin Gomez. "Positive edge effects for arboreal marsupials: an assessment of potential mechanisms." Wildlife Research 33, no. 2 (2006): 121. http://dx.doi.org/10.1071/wr04059.
Full textAbstract:
In this study we examined the potential for positive edge effects on folivorous arboreal marsupials inhabiting upland rainforest in the Wet Tropics region of far north Queensland, Australia. We predicted that the folivores should have increased densities at edges relative to interior forest 90 m from the edge owing to the following causal factors, either separately or in combination: (a) increased foliar biomass, measured as vertical foliage density; and/or (b) increased abundance of preferred food trees. To test these hypotheses, we conducted surveys of the lemuroid ringtail possum (Hemibelideus lemuroides), the green ringtail possum (Pseudochirops archeri), the Herbert River ringtail possum (Pseudochirulus herbertensis) and the coppery brushtail possum (Trichosurus vulpecula johnstonii) at two remnant rainforest sites with ‘hard’ edges such as roads or pasture. Because arboreal species are often difficult to survey accurately within forests, we utilised pellet counts as an index of the population and compared this to the common survey technique of night spotlighting. Our results indicated that pellet counts, combined over all species, were positively and strongly correlated with spotlighting results. Using pellet counts as a relative index of arboreal folivore populations, we found that edge transects contained a higher abundance of all species combined than did interior transects. Further, total foliage density in the 10–30-m vertical transect was found to be significantly correlated with total pellet counts at edge transects. Total preferred tree species was not significantly different between edge and interior transects. From these results we propose that foliage density, as a surrogate for biomass, is a possible mechanism explaining the higher abundance of arboreal marsupials at the edges of these two highland rainforest sites in north Queensland.
43
Armati-Gulson, P., and J. Lowe. "Histology and scanning electron microscopy of the development of the reproductive tract of the Common Ringtail Possum Pseudocheirus peregrinus (Pseudocheiridae: Marsupialia)." Australian Mammalogy 8, no. 2 (April 1, 1985): 97–109. http://dx.doi.org/10.1071/am85008.
Full textAbstract:
This paper describes the histological development of the reproductive tract of the female Common Ringtail Possum Pseudocheirus peregrinus. Scanning electron microscopy of the lumen of the Fallopian tubes and the uteri shows that the cells lining these tubes are ciliated or covered with microvilli. The lumenal configuration of these cells is polygonal. The development of the cilia, microvilli and well defined muscle layers found in the mature females, began in the juvenile. This sequence of differentiation indicates that the histological arrangement of the reproductive tract is associated with the onset of maturation, ovulation, pregnancy and birth of the young. This paper complements information presented in an earlier paper (Armati-Gulson and Lowe 1984) .
44
Lindenmayer, David B., Christopher MacGregor, Alan Welsh, Christine F. Donnelly, and Darren Brown. "The use of hollows and dreys by the common ringtail possum (Pseudocheirus peregrinus) in different vegetation types." Australian Journal of Zoology 56, no. 1 (2008): 1. http://dx.doi.org/10.1071/zo08054.
Full textAbstract:
Tree hollows are a key habitat component for a large number of Australian vertebrates and understanding how these resources are used is critical for developing successful management and conservation strategies for particular species or sets of species. Some hollow-using vertebrates are capable of using other kinds of nest sites. The common ringtail possum (Pseudocheirus peregrinus) is one of these species and it is known to use tree hollows and also to construct nests (dreys) made from sticks and leaves. Nest site selection by P. peregrinus may be a function of hollow availability. This proposition and several related questions were tested in a radio-tracking study that examined patterns of tree hollow and drey use by P. peregrinus in a range of vegetation types in Booderee National Park in Jervis Bay Territory. In addition, this study explored whether hollow and drey use was influenced by a wildfire that occurred in the study region in late 2003. It was found that use of hollows or dreys appeared to be a function of the availability of these resources. Most individuals were either primarily hollow users or primarily drey users. These patterns conformed to differences we recorded in hollow abundance between vegetation types: drey use was most pronounced in shrubland where hollows were rare and hollow use was most prevalent in forest where hollows were abundant. We found no evidence to suggest that hollow or drey use was influenced by fire. There was a trend pattern in our data suggesting that home-range size of P. peregrinus was larger in burnt versus unburnt sites but this effect was not statistically significant. Evidence was found that P. peregrinus selected particular kinds of trees as nest sites. Hollows in dead trees were more often used than those in living trees. Smaller dreys were most likely to be used. Several kinds of nest-selection effects that were contrary to the findings of studies of other arboreal marsupials were identified. These included more frequent use of smaller diameter trees with fewer cavities. The reasons for these unexpected results remain unclear. Findings such as those quantifying gender differences in the frequency of drey use, as well as marked between-vegetation-type differences in nest-type selection, indicate that nest use and nesting behaviour in P. peregrinus may be more complex than previously recognised. These findings also indicate that a deep understanding of the nesting biology of a species may require careful studies of both sexes, across a range of environments, and where disturbances have and have not occurred.
45
Watson, Shelley, William J. Foley, Stuart McLean, Susan Brandon, and Noel W. Davies. "Quantitative urinary excretion of unmetabolised Nτ-[Me-14C]methylhistidine by the common ringtail possum (Pseudocheirus peregrinus) marsupialia." Comparative Biochemistry and Physiology Part A: Physiology 115, no. 1 (September 1996): 53–55. http://dx.doi.org/10.1016/0300-9629(96)00001-1.
Full text
46
Lindenmayer, D. B., C. I. MacGregor, R. B. Cunningham, R. D. Incoll, M. Crane, D. Rawlins, and D. R. Michael. "The use of nest boxes by arboreal marsupials in the forests of the Central Highlands of Victoria." Wildlife Research 30, no. 3 (2003): 259. http://dx.doi.org/10.1071/wr02047.
Full textAbstract:
The results are reported of a nest-box study conducted in two locations in the mountain ash (Eucalyptus regnans) forests of the Central Highlands of Victoria (south-eastern Australia) to compare usage of different nest-box designs located at different heights in trees. A total of 96 nest boxes was established using a rigorous experimental design – two regions (Powelltown and Toolangi State Forests), two forest age classes (20-year post-logging regrowth and 60-year fire- and salvage-logging regrowth), two nest-box designs (large boxes with large entrance holes and small boxes with small entrance holes), and two heights at which nest boxes were attached to trees (3 m and 8 m above the ground). The study entailed setting out four nest boxes at each of 24 sites to meet the design criteria. Evidence of occupancy by vertebrates was recorded in a total of 19 of 96 boxes on 11 of 24 sites site during regular inspections over more than three years. Thirteen boxes were used by Leadbeater's possum (Gymnobelideus leadbeateri), six by the mountain brushtail possum (Trichosurus cunninghami) and seven by the common ringtail possum (Pseudocheirus peregrinus). The common ringtail possum and mountain brushtail possum were seen only in high–large boxes but Leadbeater's possum used all but the low–large boxes. There was evidence of spatial dependence in usage patterns, with all four boxes at a given site showing signs of eventually being occupied. Only two nest boxes located in mountain ash forest regenerating after the 1939 wildfires were occupied. Relatively limited use of nest boxes supports concerns about the use of a nest box over large scales and long timeframes as an effective recovery tool for species threatened by the loss and subsequent shortage in the numbers of naturally occurring hollows.
47
Morrison, Mark, Chris S McSweeney, and A.-D. G Wright. "The vertebrate animal gut in context ? microbiomes, metagenomes and methane." Microbiology Australia 28, no. 3 (2007): 107. http://dx.doi.org/10.1071/ma07107.
Full textAbstract:
The microbial world colonises the gastrointestinal tracts of vertebrates soon after birth or hatching. These animal-microbe relationships have been described as competitive, cooperative or combinatorial, and all provide a variety of functional and metabolic capabilities that are relevant to host animal nutrition, health and well-being. The evolutionary adaptations of Australia?s marsupial herbivores have been relatively well characterised and favour both the cooperative and combinatorial animal-microbe models. Kangaroos and wallabies possess the cooperative model: the foregut functions as an obligate combustion chamber for a microbiome specialised in the release of nutrients from plant biomass, and which precedes a region of acid and pepsinogen secretions by the host. The common ringtail possum and wombats are examples of Australian herbivores with specialised caecal and colonic obligate combustion chambers, respectively. As such, these animals typify the combination model of animal-microbe association: the stomach and its associated digestive processes precede the obligate combustion chamber and its resident microbiome that coordinates the enzymatic hydrolysis and fermentation of plant biomass.
48
Foley, William J. "Nitrogen and Energy Retention and Acid-Base Status in the Common Ringtail Possum (Pseudocheirus peregrinus): Evidence of the Effects of Absorbed Allelochemicals." Physiological Zoology 65, no. 2 (March 1992): 403–21. http://dx.doi.org/10.1086/physzool.65.2.30158260.
Full text
49
Goldingay, Ross L., David Rohweder, and Brendan D. Taylor. "Will arboreal mammals use rope-bridges across a highway in eastern Australia?" Australian Mammalogy 35, no. 1 (2013): 30. http://dx.doi.org/10.1071/am12006.
Full textAbstract:
Artificial structures designed to promote road-crossing by arboreal mammals are increasingly being installed in Australia but there is a limited understanding of their usefulness. We studied five 50–70-m-long rope-bridges (encompassing three designs) erected across the Pacific Highway, a major freeway in eastern Australia. Native arboreal mammals showed a willingness to explore these structures, being detected by camera traps on four rope-bridges. The vulnerable squirrel glider (Petaurus norfolcensis) crossed on one rope-bridge at least once every 4.5 weeks over a 32-week period. The feathertail glider (Acrobates pygmaeus), common ringtail possum (Pseudocheirus peregrinus) and the common brushtail possum (Trichosurus vulpecula) were detected on one of two rope-bridges that extended under the freeway at creek crossings. The feathertail glider was detected on all three rope-bridge designs. Our results suggest that rope-bridges have the potential to restore habitat connectivity disrupted by roads for some arboreal mammals. Further research is needed to refine the design and placement of rope-bridges as well as to determine whether these structures promote gene flow.
50
F Skerratt, Lee. "Sarcoptes scabiei: an important exotic pathogen of wombats." Microbiology Australia 26, no. 2 (2005): 79. http://dx.doi.org/10.1071/ma05079.
Full textAbstract:
Sarcoptes scabiei is a parasitic astigmatid mite, which causes scabies in people and sarcoptic mange in mammals. Importantly, it is an emerging disease in wildlife throughout the world. The mite originates from a human ancestor and is thought to have spread to domestic and then free-living animals. Based on the recent emergence of sarcoptic mange in Australian wildlife and Aboriginal communities, it is thought that Sarcoptes scabiei was probably introduced to Australia by the Europeans and their animals. The mitochondrial genetic similarity of mites from Australian wildlife and domestic animals supports this. In Australian wildlife, sarcoptic mange has been reported in the common wombat Vombatus ursinus, southern hairy-nosed wombat Lasiorhinus latifrons, koala Phascolarctos cinereus, common ringtail possum Pseudocheirus peregrinus and in 2003 in the agile wallaby Macropus agilis. Compared with other native species, sarcoptic mange has by far its greatest impact on wombats, particularly common wombats, and is capable of causing high morbidity and mortality rates.