| long-term effect of low dietary calcium:phosphate ratio on the skeleton of cebus albifrons monkeys. | wildcaught cinnamon ringtail monkeys, cebus albifrons, were fed diets with ca:p ratios of 1:4 1:2.1 1:0,4, and 1:0.5 for 3 to 88 months. monkeys fed the diet with ca:p ratios of 1:4 and 1:21 c ratios similar to that of human diets) had minor microscopic changes suggestive of osteoporosis when compared to other species of animals. the changes were not detected by conventional or magnification radiography or by 125i photon absorptiometry. these findings are in in striking contrast to studies in ot ... | 1977 | 404407 |
| isolation, partial sequence and asynchronous appearance during lactation of lysozyme and alpha-lactalbumin in the milk of a marsupial, the common ringtail possum (pseudocheirus peregrinus). | 1. lysozyme and alpha-lactalbumin from the milk of the common ringtail possum have been purified and partially sequenced. 2. the lysozyme had similar enzymic activity to the c-type lysozyme of the domestic hen and 43% homology over the n-terminal 49 residues. 3. alpha-lactalbumin was present in the milk in two biologically active forms; the more acidic form had 66% sequence homology with the n-terminal 35 residues of red-necked wallaby, 54% with human and 43% with bovine alpha-lactalbumin. 4. sd ... | 1989 | 2605916 |
| multiple helminth infections in cinnamon-ringtail monkeys (cebus albifrons). | | 1967 | 4228081 |
| occurrence of athesmia sp. in the cinnamon ringtail monkey, cebus albifrons. | | 1968 | 4233857 |
| ringtail in mystromys albicaudatus: a case report. | | 1971 | 4328610 |
| ascorbic acid turnover and excretion in two arboreal marsupials and in laboratory rabbits. | rates of turnover and routes of excretion of 1-14c-ascorbic acid were compared among laboratory rabbits and two species of arboreal marsupials. ringtail possums (pseudocheirus peregrinus) exhibited higher blood ascorbate levels than either brushtail possums (trichosurus vulpecula) or rabbits, as well as greater pool sizes, shorter half-times and higher total entry rates of ascorbic acid. these differences were due partly to the high ascorbic acid content of eucalyptus foliage, the ringtail's die ... | 1984 | 6697698 |
| mycobacterium ulcerans in wild animals. | mycobacterium ulcerans infection, or buruli ulcer, is the third most frequent mycobacterial disease in humans, often causing serious deformities and disability. the disease is most closely associated with tropical wetlands, especially in west and central africa. most investigators believe that the aetiological agent proliferates in mud beneath stagnant waters. modes of transmission may involve direct contact with the contaminated environment, aerosols from water surfaces, and water-dwelling faun ... | 2001 | 11288515 |
| effect of relative humidity on rat breeding and ringtail. | | 1957 | 13464821 |
| jensenone: biological reactivity of a marsupial antifeedant from eucalyptus. | the resistance of eucalyptus to browsing mammals has been related to the level and type of formylated phloroglucinol compounds (fpcs) present in the leaf. the antifeedant activity of fpcs appears to depend on their aldehyde groups, but little else is known of their mode of action. we have sought to elucidate this further by examining the biological reactivity and disposition of jensenone, a model fpc. neither jensenone nor any metabolites were detected in urine or feces of marsupial brushtail or ... | 2004 | 15074655 |
| susceptibility of cebus capucina (the south american ringtail monkey) and cercopithecus cephus (the african mustache monkey) to poliomyelitis virus. | 1. the south american ringtail monkey, cebus capucina, has been infected with the virus of poliomyelitis as found in ultracentrifuged concentrates from poliomyelitic human stools. 2. this species was also found susceptible to poliomyelitis virus found in rhesus and cynomolgus monkey cords, representing early generations of virus derived from two different human sources and from flies trapped in an epidemic area. 3. the hartford strain of poliomyelitis has been successfully established in differe ... | 1943 | 19871327 |
| seroprevalence of trypanosoma cruzi among eleven potential reservoir species from six states across the southern united states. | trypanosoma cruzi, the causative agent of chagas' disease, is a substantial public health concern in latin america. although rare in humans and domestic animals in the united states, t. cruzi is commonly detected in some wildlife species, most commonly raccoons (procyon lotor) and virginia opossums (didelphis virginiana). to increase our understanding of the reservoir host species range and geographic distribution, 11 species of mammals from six states spanning the known range of t. cruzi (arizo ... | 2010 | 20020815 |
| raccoon roundworms in pet kinkajous--three states, 1999 and 2010. | baylisascaris procyonis (bp) is the common roundworm of raccoons (procyon lotor). adult bp live in the small intestine of this host, where they produce eggs that are passed in the feces. bp eggs ingested by nondefinitive host species hatch in the intestine, producing larvae that can migrate widely, causing visceral, ocular, or neural larva migrans. cases of neural larva migrans in humans caused by bp likely acquired from raccoons have resulted in severe encephalitis with permanent deficits and i ... | 2011 | 21412211 |
| francisella tularensis subspecies holarctica, tasmania, australia, 2011. | we report a case of ulceroglandular tularemia that developed in a woman after she was bitten by a ringtail possum (pseudocheirus peregrinus) in a forest in tasmania, australia. francisella tularensis subspecies holarctica was identified. this case indicates the emergence of f. tularensis type b in the southern hemisphere. | 2012 | 22931809 |
| endemic orthopoxvirus circulating in procyonids in mexico. | limited serosurveillance studies suggested that orthopoxviruses (opxv) are widespread in the us (e.g., raccoonpox virus, skunkpox virus, volepox virus) and brazil (vaccinia virus); however, their animal reservoir(s) remain unconfirmed. mexican mammal diversity includes several species related to those in which evidence for opxv infections has been found (oryzomys, peromyscus, microtus, and procyonidae). the presence of these groups of mammals in mexico and the evidence of their possible involvem ... | 2016 | 27224209 |
| a major role for mammals in the ecology of mycobacterium ulcerans. | mycobacterium ulcerans is the causative agent of buruli ulcer (bu), a destructive skin disease found predominantly in sub-saharan africa and south-eastern australia. the precise mode(s) of transmission and environmental reservoir(s) remain unknown, but several studies have explored the role of aquatic invertebrate species. the purpose of this study was to investigate the environmental distribution of m. ulcerans in south-eastern australia. | 2010 | 20706592 |
| data from camera surveys identifying co-occurrence and occupancy linkages between fishers (pekania pennanti), rodent prey, mesocarnivores, and larger predators in mixed-conifer forests. | these data provide additional information relevant to the frequency of fisher detections by camera traps, and single-season occupancy and local persistence of fishers in small patches of forest habitats detailed elsewhere, "landscape fuel reduction, forest fire, and biophysical linkages to local habitat use and local persistence of fishers (pekania pennanti) in sierra nevada mixed-conifer forests" [10]. the data provides insight on camera trap detections of 3 fisher predators (bobcat [lynx rufus ... | 2016 | 26937448 |
| characterization of 15 tetranucleotide microsatellite markers in the ringtail (bassariscus astutus). | we characterized 15 polymorphic tetranucleotide microsatellite markers for the ringtail, bassariscus astutus. we tested these loci in 21 individuals captured in arizona and texas and found six to 19 alleles per locus. observed and expected heterozygosities ranged from 0.381 to 1.000 and from 0.381 to 0.941, respectively. all loci were in hardy-weinberg equilibrium, and none were in linkage disequilibrium. these markers may be used to investigate population genetics and mating patterns in this sp ... | 2009 | 21564605 |
| ectoparasites of the ringtail, bassariscus astutus, from west texas. | | 1979 | 448691 |
| etiology of yellow fever : ii. transmission experiments on yellow fever. | by injecting into guinea pigs the blood of yellow fever cases occurring in guayaquil a group of symptoms and lesions closely resembling those observed in human yellow fever were induced in a limited number of instances. of 74 guinea pigs inoculated with specimens of blood from 27 cases of yellow fever, 8, representing 6 cases, came down with the symptoms; namely, a marked rise of temperature after a period of incubation averaging 3 to 6 days, with simultaneous suffusion of the capillaries, parti ... | 1919 | 19868337 |
| the ancestral carnivore karyotype (2n = 38) lives today in ringtails. | chromosome painting was used to investigate the conservation of high-resolution longitudinal 4',6-diamidino-2-phenylindole (dapi)/g bands in carnivore chromosomes. cat (felis catus) and raccoon dog (nyctereutes procyonoides) painting probes were hybridized to the ringtail (bassaricus astutus), dwarf mongoose (helogale parvula), and malagasy civet (fossa fossa) to identify homologous chromosome elements. the patterns of chromosome segment homology among carnivore species allowed us to reconstruct ... | 2008 | 18339652 |
| the role of feral mammals on wildlife infectious disease prevalence in two nature reserves within mexico city limits. | wild and feral medium-sized mammals were live trapped at two natural protected areas within the mexico city limits to determine antibody prevalence for the most common infectious diseases (rabies, toxoplasmosis, and canine parvovirus) in dogs and cats. mammals were trapped during the dry (march-april) and rainy seasons (july-august) of 1996 and 1997. a total of 68 individuals were captured, representing 8 species: opossums (didelphis virginiana), ringtails (bassariscus astutus), spotted skunks ( ... | 2005 | 17312768 |
| francisella tularensis ssp. holarctica in ringtail possums, australia. | the occurrence of francisella tularensis outside of endemic areas, such as north america and eurasia, has been enigmatic. we report the metagenomic discovery and isolation of f. tularensis ssp. holarctica biovar japonica from diseased ringtail possums in sydney, australia. this finding confirms the presence of f. tularensis in the southern hemisphere. | 2017 | 28628459 |
| lanolin as a treatment option for ringtail in transgenic rats. | ringtail is a condition characterized by dry skin and annular constrictions that sometimes result in loss of portions of the tail. this condition most commonly affects preweanling rats, and low relative humidity is thought to be a principal cause. the use of transgenic rats in our facility has been increasing since 2002, and we recently diagnosed several litters from transgenic fischer 344 rats (rattus norvegicus) with ringtail. treatment was necessary to maintain the health and integrity of the ... | 2006 | 16539341 |
| ringtail in new-born norway rats; a study of the effect of environmental temperature and humidity on incidence. | | 1958 | 13563862 |
| divergent evolution in m6p/igf2r imprinting from the jurassic to the quaternary. | m6p/igf2r imprinting first appeared approximately 150 million years ago following the divergence of prototherian from therian mammals. although m6p/igf2r is clearly imprinted in opossums and rodents, its imprint status in humans remains ambiguous. it is also still unknown if m6p/igf2r imprinting was an ancestral mammalian epigenotype or if it evolved convergently. we report herein that m6p/igf2r is imprinted in artiodactyla, as it is in rodentia and marsupialia, but that it is not imprinted in s ... | 2001 | 11532981 |
| marsupials and eutherians reunited: genetic evidence for the theria hypothesis of mammalian evolution. | the three living monophyletic divisions of class mammalia are the prototheria (monotremes), metatheria (marsupials), and eutheria ('placental' mammals). determining the sister relationships among these three groups is the most fundamental question in mammalian evolution. phylogenetic comparison of these mammals by either anatomy or mitochondrial dna has resulted in two conflicting hypotheses, theria and marsupionta, and has fueled a "genes versus morphology" controversy. we have cloned and analy ... | 2001 | 11420613 |
| ringtail in suckling munich wistar fromter rats: a histopathologic study. | ringtail is a pathologic condition of the tail of rats and other rodents that is traditionally attributed to low environmental humidity, although dietary deficiencies, genetic susceptibility, environmental temperature, and degree of hydration of the animal also have been suggested as possible causes. to the authors' knowledge, a detailed histopathologic study that may serve to shed light on the etiopathogenesis of this disease has not yet been published. we describe the histologic findings of ri ... | 2000 | 11099138 |
| traumatic injuries occurring in possums and gliders in the blue mountains, new south wales. | twenty common brushtail possums (trichosurus vulpecula), 23 ringtail possums (pseudocheirus peregrinus) and five sugar gliders (petaurus breviceps) from the blue mountains, new south wales, australia were evaluated for traumatic injuries between 1989 and 1990. ten brushtail possums and five ringtail possums were hit by motor vehicles with injuries primarily to the anterior of the body. fifteen ringtail possums and all sugar gliders were attacked by cats. four brushtail possums were attacked by d ... | 1993 | 8258866 |
| immunohistological staining of lymphoid tissue in four australian marsupial species using species cross-reactive antibodies. | antibodies raised against evolutionarily conserved intracytoplasmic peptide sequences of human t and b lymphocyte antigens and an antibody raised specifically against koala serum igg were assessed for their capacity for immunoperoxidase staining of formalin fixed lymphoid tissues of koalas (phascolarctos cinereus), common brushtail possums (trichosurus vulpecula), common ringtail possums (pseudocheirus peregrinus) and tammar wallabies (macropus eugenii). utilizing microwave pretreatment and a st ... | 1995 | 7493768 |
| the prevalence of anti-leptospiral agglutinins in sera of wildlife in southeastern australia. | anti-leptospiral agglutinins were found in the serum from 18 (7 species) of 419 (25 species) animals sampled from various areas of southeastern australia. positive serologic reactions were observed in 5 of 25 (20%) brush-tailed possum (trichosurus vulpecula), 1 of 26 (3.8%) tammar wallaby (macropus eugenii), 2 of 12 (16.7%) swamp wallaby (wallabia bicolor), 1 of 3 (33.3%) koala (phascolarctos cinereus), 3 of 41 (7.3%) common wombat (vombatus ursinus), 2 of 100 (2%) bush rat (rattus fuscipes) and ... | 1981 | 7241704 |
| tetrapetalonema (t.) colombiensis sp. n. (nematoda: filarioidea) from colombian primates. | tetrapetalonema (t.) colombiensis sp. n., a filarial nematode from the subcutaneous and intermuscular connective tissues of squirrel monkeys (saimiri sciureus) and tufted ringtail monkeys (cebus apella) from central colombia is described. tetrapetalonema colombiensis is a very small species (male 8 mm, females 11-21 mm), and within the subgenus most closely resembles t. panamensis and t. saimiri in dimensions and in general appearance. it can be distinguished from these species by the following ... | 1982 | 7175616 |
| protein sequence evidence for monophyly of the carnivore families procyonidae and mustelidae. | the amino acid sequence of the eye lens protein alpha-crystallin a of the ring-tailed cat, bassariscus astutus, has been determined. the sequence of the bassariscus alpha a chain, which is 173 residues long, was compared with the previously determined set of 41 mammalian alpha a sequences. among the investigated carnivores (dog, cat, sloth bear, american mink, gray seal, and california sea lion) the bassariscus alpha a sequence exclusively shares two amino acid replacements with the alpha a chai ... | 1986 | 3444403 |
| ringtail in the pouched mouse (saccostomus campestris). | laboratory colonies of the pouched mouse (saccostomus campestris) were housed in solid bottom cages and fed a varied diet containing excess fatty acids. ringtail was only initiated in animals of all ages, from populations originating from different areas of south africa, when the relative humidity fell below 30%. the incidence of ringtail was curtailed by maintaining relative humidity above 45% in animal houses. | 1990 | 2395318 |
| digesta retention and fibre digestion in brushtail possums, ringtail possums and rabbits. | 1. mean retention times (mrts) of fluid (marked with co-edta), fine particles (mordanted with yb) and large particles (mordanted with cr) were measured in brushtail possums (trichosurus vulpecula), ringtail possums (pseudocheirus peregrinus) and laboratory rabbits fed semipurified diets. 2. in brushtail possums there were no significant differences in mrt among the three digesta markers. 3. in ringtail possums mrts of the fluid and fine particle markers were approximately twice that of the large ... | 1990 | 1976477 |
| klossiella spp. in the kidneys of peramelid, petaurid, and macropodid marsupials. | klossiella spp. were found in kidneys of individuals from six genera in two of the three superfamilies of australian marsupials. klossiella quimrensis sp.n. is described in the bandicoots, isoodon obesulus and perameles gunnii (peramelidae). k. convolutor sp.n. is described in the ringtail possum pseudocheirus peregrinus (petauridae). three macropodid genera were infected. k.serendipensis sp.n. is described in the swamp wallaby, wallabia bicolor, and k. callitris sp.n. is described in the wester ... | 1975 | 807049 |
| comparative effects of aminotriazole on normal and acatalasemic mice. | some pharmacological and toxicological effects of dietary 3-amino-1,2,4-triazole (at), a known catalase inhibitor, antithyroid agent, and carcinogen, have been examined, using acatalasemic (csb) and normal catalase, "wild-type" (csa) substrains of highly inbred c3h and c57bl mice. it was found that (a) the acatalasemic substrains are more resistant to weight loss and death on the at diet than are their normal catalase counterparts; (b) csb and csa substrains of c57bl mice are more resistant to w ... | 1978 | 731180 |
| interspecific variation of zona pellucida glycoconjugates in several species of marsupial. | the zona pellucida glycoconjugate content of several marsupial species was investigated using differential lectin histochemistry. ovaries from fat-tailed dunnarts, a southern brown bandicoot, grey short-tailed opossums, brushtail possums, ringtail possums, koalas and eastern grey kangaroos were fixed, embedded in paraffin wax, sectioned and stained with ten fluorescein isothiocyanate-conjugated lectins. sections were also incubated with either neuraminidase or saponified, respectively, before in ... | 2000 | 10864820 |
| predation pressure on an imperfect batesian micicry complex in the presence of alternative prey. | differential predation pressure and the probability of predation on a batesian mimicry complex and on alternative prey were estimatedin a field experiment. the mimicry complex was composed of a noxious model (eleodes obscura (say)) and a palatable mimic (stenomorpha marginata (leconte)). house crickets (acheta domesticus) (linn.) were used as alternative prey. the experiment was conducted for 23 nights in august and september to approximate the peak seasonal activity time period during which bot ... | 1988 | 28312410 |
| hematologic and serum biochemical reference ranges and an assessment of exposure to infectious diseases prior to translocation of the threatened western ringtail possum (pseudocheirus occidentalis). | health screening of animals before translocation is important to minimize the risk of pathogen transmission between sites and species. reintroduction has been incorporated into management of the endangered western ringtail possum (pseudocheirus occidentalis) to mitigate for habitat loss within the species' core range in southwestern australia. between november 2005 and march 2008 we screened 47 wild and 24 captive p. occidentalis and 68 sympatric common brushtail possums (trichosurus vulpecula h ... | 2013 | 24502710 |
| clinical, microbiological and pathological findings of mycobacterium ulcerans infection in three australian possum species. | buruli ulcer (bu) is a skin disease caused by mycobacterium ulcerans, with endemicity predominantly in sub-saharan africa and south-eastern australia. the mode of transmission and the environmental reservoir(s) of the bacterium and remain elusive. real-time pcr investigations have detected m. ulcerans dna in a variety of australian environmental samples, including the faeces of native possums with and without clinical evidence of infection. this report seeks to expand on previously published fin ... | 2014 | 24498451 |
| potential wildlife sentinels for monitoring the endemic spread of human buruli ulcer in south-east australia. | the last 20 years has seen a significant series of outbreaks of buruli/bairnsdale ulcer (bu), caused by mycobacterium ulcerans, in temperate south-eastern australia (state of victoria). here, the prevailing view of m. ulcerans as an aquatic pathogen has been questioned by recent research identifying native wildlife as potential terrestrial reservoirs of infection; specifically, tree-dwelling common ringtail and brushtail possums. in that previous work, sampling of environmental possum faeces det ... | 2014 | 24498452 |
| multisystemic listeriosis in a common brushtail possum (trichosurus vulpecula) and two common ringtail possums (pseudocheirus peregrinus). | a single free-ranging common brushtail possum (trichosurus vulpecula) and 2 captive sibling common ringtail possums (pseudocheirus peregrinus)from a zoological facility in sydney, australia, were diagnosed with multisystemic listeriosis. the brushtail was found dead in an animal enclosure while the ringtails presented with signs of cardiovascular collapse and died shortly thereafter. all 3 animals were culture positive forlisteria monocytogenesand demonstrated focal suppurative lesions within th ... | 2016 | 26215760 |
| limited ecological connectivity of an arboreal marsupial across a forest/plantation landscape despite apparent resilience to fragmentation. | demographic and genetic replenishment of populations through the exchange of individuals is essential for their persistence. habitat loss and fragmentation can reduce the permeability of landscapes, hinder dispersal and compromise the genetic integrity of populations over time. we examined ecological connectivity in an arboreal marsupial, the common ringtail possum (pseudocheirus peregrinus) in fragmented forests of southeastern australia. this species is potentially robust to fragmentation base ... | 2011 | 21507094 |
| in vitro hepatic microsomal metabolism of meloxicam in koalas (phascolarctos cinereus), brushtail possums (trichosurus vulpecula), ringtail possums (pseudocheirus peregrinus), rats (rattus norvegicus) and dogs (canis lupus familiaris). | quantitative and qualitative aspects of in vitro metabolism of the non-steroidal anti-inflammatory drug meloxicam, mediated via hepatic microsomes of specialized foliage (eucalyptus) eating marsupials (koalas and ringtail possums), a generalized foliage eating marsupial (brushtail possum), rats, and dogs, are described. using a substrate depletion method, intrinsic hepatic clearance (in vitro clint) was determined. significantly, rates of oxidative transformation of meloxicam, likely mediated vi ... | 2014 | 24345479 |
| effects of three food enrichment items on the behavior of black lemurs (eulemur macaco macaco) and ringtail lemurs (lemur catta) at the henson robinson zoo, springfield, illinois. | this study tested 3 food enrichment items mentioned in a laboratory primate newsletter with 6 adult eulemur macaco and 3 adult lemur catta to examine whether the items would affect the behavior of the lemurs. the results suggest that food enrichment item 3 (a wire box filled with whole grapes, apples, or both hidden in straw hung from a branch within the enclosure) caused a significant decrease in the incidence of resting and a significant increase in the incidences of playing and grooming, with ... | 2006 | 16956316 |
| a mixed epithelial and stromal tumor of the kidney in a ringtail lemur (lemur catta). | primary renal tumors are rare neoplasms in nonhuman primates. this report describes a mixed epithelial and stromal tumor of the kidney (mestk) in a 14.5-year-old female ringtail lemur. the well-demarcated, solid, and cystic mass was located in the pelvis of the left kidney and consisted histologically of both epithelial and mesenchymal components. the mesenchymal cells were arranged in fascicles around cysts lined by a well-differentiated epithelium. neither the mesenchymal nor the epithelial pa ... | 2007 | 17317808 |
| phylogeny of the procyonidae (mammalia: carnivora): molecules, morphology and the great american interchange. | the procyonidae (mammalia: carnivora) have played a central role in resolving the controversial systematics of the giant and red pandas, but phylogenetic relationships of species within the family itself have received much less attention. cladistic analyses of morphological characters conducted during the last two decades have resulted in topologies that group ecologically and morphologically similar taxa together. specifically, the highly arboreal and frugivorous kinkajou (potos flavus) and oli ... | 2007 | 17174109 |
| consistent patterns of vehicle collision risk for six mammal species. | the occurrence and rate of wildlife-vehicle collisions are related to both anthropocentric and environmental variables, however, few studies compare collision risks for multiple species within a model framework that is adaptable and transferable. our research compares collision risk for multiple species across a large geographic area using a conceptually simple risk framework. we used six species of native terrestrial mammal often involved with wildlife-vehicle collisions in south-east australia ... | 2017 | 28704730 |
| plant exudates: a previously unreported feature in the diet of the common ringtail possum. | | 2017 | 28475212 |
| an endangered arboreal specialist, the western ringtail possum (pseudocheirus occidentalis), shows a greater genetic divergence across a narrow artificial waterway than a major road. | the fragmentation of habitats by roads and other artificial linear structures can have a profound effect on the movement of arboreal species due to their strong fidelity to canopies. here, we used 12 microsatellite dna loci to investigate the fine-scale spatial genetic structure and the effects of a major road and a narrow artificial waterway on a population of the endangered western ringtail possum (pseudocheirus occidentalis) in busselton, western australia. using spatial autocorrelation analy ... | 2016 | 26784921 |
| pharmacokinetics of enrofloxacin following oral and subcutaneous administration in the common ringtail possum (pseudocheirus peregrinus). | [correction added on 23 march 2015, after first online publication: terminal half-life values of enrofloxacin is corrected in the fourth sentence of the abstract] clinically healthy common ringtail possums (n = 5) received single doses of 10 mg/kg enrofloxacin orally and then 2 weeks later subcutaneously. serial plasma samples were collected over 24 h for each treatment phase, and enrofloxacin concentrations were determined using a validated hplc assay. pharmacokinetic parameters were determined ... | 2015 | 25622984 |
| pathologic and environmental studies provide new pathogenetic insights into ringtail of laboratory mice. | ringtail is a pathologic condition of laboratory rodents characterized by annular constrictions of the tail. traditionally, it is classified as an environmental disorder caused by low relative humidity, but other factors (temperature, dietary deficiencies, genetic susceptibility, and caging type) have also been proposed. twenty litters of mice with ringtail lesions occurred from september 2010 to august 2013 in a facility located in the northern italy. mice were maintained under controlled envir ... | 2015 | 25377693 |
| four species of arboreal folivore show differential tolerance to a secondary metabolite. | the marsupials that eat eucalyptus in south-eastern australia provide an example of animals with similar niche requirements occurring sympatrically. they certainly differ in size, ranging from about 1 kg in the greater glider (petauroides volans) and the closely related common ringtail possum (pseudocheirus peregrinus), to 4 kg (common brushtail possum, trichosurus vulpecula) and up to 15 kg in the koala (phascolarctos cinereus). all species, however, may eat considerable amounts of eucalypt fol ... | 2014 | 24974269 |
| detection of helicobacter species in the gastrointestinal tract of ringtail possum and koala: possible influence of diet, on the gut microbiota. | the presence of helicobacter spp. was examined in the liver and in different regions of the gastrointestinal tract (git) including the stomach, 3 cm above ileum, ileum, caecum, colon and rectum of 10 ringtail possums (rtps) and 3 koalas using a combination of microscopy, culture and pcr. helicobacter was detected in the distal end of the git of 7 of 10 rtps by direct pcr and in all (10/10) rtps by nested pcr. five 's' shaped isolates with bipolar sheathed flagella were isolated from the lower bo ... | 2013 | 23910524 |
| stress triangle: do introduced predators exert indirect costs on native predators and prey? | non-consumptive effects of predators on each other and on prey populations often exceed the effects of direct predation. these effects can arise from fear responses elevating glucocorticoid (gc) hormone levels (predator stress hypothesis) or from increased vigilance that reduces foraging efficiency and body condition (predator sensitive foraging hypothesis); both responses can lead to immunosuppression and increased parasite loads. non-consumptive effects of invasive predators have been little s ... | 2013 | 23585861 |
| behavioral responses of native prey to disparate predators: naiveté and predator recognition. | it is widely accepted that predator recognition and avoidance are important behaviors in allowing prey to mitigate the impacts of their predators. however, while prey species generally develop anti-predator behaviors through coevolution with predators, they sometimes show accelerated adoption of these behaviors under strong selection pressure from novel species. we used a field manipulation experiment to gauge the ability of the common ringtail possum (pseudocheirus peregrinus), a semi-arboreal ... | 2013 | 22865005 |
| poxvirus infection outbreak in common ringtails (pseudocheirus peregrinus). | viruses belonging to the poxviridae family have long been recognised as pathogens of invertebrates and vertebrates alike. poxvirus infection in australian macropodids is well described, but few cases have been documented in marsupial species beyond this family. only one instance has been previously reported in the common ringtail (pseudocheirus peregrinus). this case report describes a poxvirus infection outbreak in a group of common ringtails held within a zoological collection in eastern austr ... | 2012 | 22443330 |
| the limit to the distribution of a rainforest marsupial folivore is consistent with the thermal intolerance hypothesis. | models of impacts of climate change on species are generally based on correlations between current distributions and climatic variables, rather than a detailed understanding of the mechanisms that actually limit distribution. many of the vertebrates endemic to rainforests of northeastern australia are restricted to upland forests and considered to be threatened by climate change. however, for most of these species, the factors controlling their distributions are unknown. we examined the role of ... | 2012 | 21987269 |
| testosterone secretion, testicular histology and the cryopreservation of cauda epididymidal spermatozoa in the common ringtail possum (pseudocheirus peregrinus). | 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 s ... | 2008 | 18402759 |
| family-level relationships among the australasian marsupial "herbivores" (diprotodontia: koala, wombats, kangaroos and possums). | the marsupial order diprotodontia includes 10 extant families, which occupy all terrestrial habitats across australia and new guinea and have evolved remarkable dietary and locomotory diversity. despite considerable attention, the interrelations of these families have for the most part remained elusive. in this study, we separately model mitochondrial rna and protein-coding sequences in addition to nuclear protein-coding sequences to provide near-complete resolution of diprotodontian family-leve ... | 2008 | 17959392 |
| myosin isoforms and fibre types in jaw-closing muscles of australian marsupials. | myosin heavy chains (myhcs) and fibre types in the masseter muscle of seven species of australian marsupials (brushtail and ringtail possums, bettong, bandicoot, dunnart, two species of antechinuses) spanning three orders were studied by native myosin electrophoresis, sds-page, immunoblotting and immunohistochemistry. we found only two fibre types in the masseter muscles of these animals: (1) masticatory fibres expressing masticatory myhc, and (2) hybrid alpha/beta fibres that co-express alpha-c ... | 2006 | 16773370 |
| sideroxylonal in eucalyptus foliage influences foraging behaviour of an arboreal folivore. | plant secondary metabolites (psms) offer plants chemical defences against herbivores, and are known to influence intake and diet choice in both insect and mammalian herbivores. however, there is limited knowledge regarding how psms influence herbivore foraging decisions. herbivore foraging decisions, in turn, directly impact on which individual plants, and plant species, are selected for consumption. we took advantage of the natural variation in sideroxylonal concentrations in the foliage of euc ... | 2006 | 16205948 |
| differential susceptibility to eucalyptus secondary compounds explains feeding by the common ringtail (pseudocheirus peregrinus) and common brushtail possum (trichosurus vulpecula). | the effect of two plant secondary metabolites, tannins and formylated phloroglucinol compounds (fpcs), on the intake of eucalyptus foliage by common ringtail (pseudocheirus peregrinus) and common brushtail possums (trichosurus vulpecula) was studied. we manipulated the amount of tannin that was free to bind with protein by coating foliage with polyethylene glycol 4000 (peg) and relied on natural intraspecific variation in fpc concentrations. in contrast to ringtail possums, brushtail possums sho ... | 2003 | 12592445 |
| coping with chemical complexity in mammal-plant interactions: near-infrared spectroscopy as a predictor of eucalyptus foliar nutrients and of the feeding rates of folivorous marsupials. | we investigated the utility of near-infrared reflectance spectroscopy (nirs) as a means of rapidly assaying chemical constituents of eucalyptus leaves and of directly predicting the intake of foliage from individual trees by greater gliders (petauroides volans) and common ringtail possums (pseudocheirus peregrinus). the concentrations of total nitrogen, neutral detergent fiber, condensed tannins and total phenolics could be predicted accurately by partial least squares regression models relating ... | 2001 | 28547399 |
| the neutral cysteine protease bleomycin hydrolase is essential for epidermal integrity and bleomycin resistance. | the papain superfamily member bleomycin hydrolase (blmh) is a neutral cysteine protease with structural similarity to a 20s proteasome. bleomycin (blm), a clinically used glycopeptide anticancer agent, is deaminated in vitro by blmh. we used gene targeting to generate mice that lack blmh and demonstrated that blmh is the sole enzyme required for blm deamination. although some blmh null mice were viable and reproduced, only about 65% of the expected number survived the neonatal period, revealing ... | 1999 | 10200322 |
| potential animal reservoir of mycobacterium ulcerans: a systematic review. | mycobacterium ulcerans is the causative agent of buruli ulcer, also known in australia as daintree ulcer or bairnsdale ulcer. this destructive skin disease is characterized by extensive and painless necrosis of the skin and soft tissue with the formation of large ulcers, commonly on the leg or arm. to date, 33 countries with tropical, subtropical and temperate climates in africa, the americas, asia and the western pacific have reported cases of buruli ulcer. the disease is rarely fatal, although ... | 2018 | 30274452 |
| administration of a 5ht3 receptor antagonist increases the intake of diets containing eucalyptus secondary metabolites by marsupials. | the effect of a naturally occurring plant phenolic constituent (the acylphloroglucinol derivative, jensenone, derived from eucalyptus jensenii) on the food intake of two folivorous marsupials, the common ringtail (pseudocheirus peregrinus) and the common brushtail possum (trichosurus vulpecula) was studied. when fed diets containing varying concentrations of jensenone, both species regulated their intake of jensenone so as not to exceed a ceiling intake. this ceiling was about twice as high for ... | 1998 | 9871345 |
| intraspecific variation in eucalyptus secondary metabolites determines food intake by folivorous marsupials. | traditional approaches to the question of the effects of plant secondary metabolites on the feeding choices of folivores of eucalyptus have focused on the tree species level, although numerous field studies of foraging behaviour have identified selection at the level of the individual trees. attempts to relate these decisions to deterrency resulting from secondary leaf chemistry have been inconclusive because assays used have focused on broad groups of compounds such as "total" phenolics. in thi ... | 1998 | 28308521 |
| a phylogeny and timescale for the evolution of pseudocheiridae (marsupialia: diprotodontia) in australia and new guinea. | pseudocheiridae (marsupialia: diprotodontia) is a family of endemic australasian arboreal folivores, more commonly known as ringtail possums. seventeen extant species are grouped into six genera (pseudocheirus, pseudochirulus, hemibelideus, petauroides, pseudochirops, petropseudes). pseudochirops and pseudochirulus are the only genera with representatives on new guinea and surrounding western islands. here, we examine phylogenetic relationships among 13 of the 17 extant pseudocheirid species bas ... | 2010 | 21125022 |
| microsatellite markers for the common ringtail possum (pseudocheirus peregrinus) and their amplification in other pseudocheirids. | eleven microsatellite markers were developed for the common ringtail possum, an arboreal marsupial abundant in fragmented forests of south-eastern australia. loci were highly polymorphic (4-32 alleles per locus) and heterozygosity ranged from 0.66 to 1. two loci deviated significantly from hardy-weinberg equilibrium proportions, possibly because of low-frequency null alleles. these markers will be informative for examining patterns of gene flow, relatedness and mating systems within fragmented p ... | 2009 | 21564951 |
| long-term dynamics of a fragmented rainforest mammal assemblage. | habitat fragmentation is a severe threat to tropical biotas, but its long-term effects are poorly understood. we evaluated longer-term changes in the abundance of larger (>1 kg) mammals in fragmented and intact rainforest and in riparian "corridors" in tropical queensland, with data from 190 spotlighting surveys conducted in 1986-1987 and 2006-2007. in 1986-1987 when most fragments were already 20-50 years old, mammal assemblages differed markedly between fragmented and intact forest. most vulne ... | 2008 | 18637907 |
| molecular surveillance of piroplasms in ticks from small and medium-sized urban and peri-urban mammals in australia. | natural landscape alterations as a consequence of urbanisation are one of the main drivers in the movements of wildlife into metropolitan and peri-urban areas. worldwide, these wildlife species are highly adaptable and may be responsible for the transmission of tick-borne pathogens including piroplasms (babesia, theileria and cytauxzoon spp.) that cause piroplasmosis in animals and occasionally in humans. little is known about piroplasms in the ticks of urban wildlife in australia. ticks from lo ... | 2018 | 29988853 |
| bamboo specialists from two mammalian orders (primates, carnivora) share a high number of low-abundance gut microbes. | bamboo specialization is one of the most extreme examples of convergent herbivory, yet it is unclear how this specific high-fiber diet might selectively shape the composition of the gut microbiome compared to host phylogeny. to address these questions, we used deep sequencing to investigate the nature and comparative impact of phylogenetic and dietary selection for specific gut microbial membership in three bamboo specialists-the bamboo lemur (hapalemur griseus, primates: lemuridae), giant panda ... | 2018 | 29188302 |
| development and social dominance among group-living primates. | organisms are integrated systems whose physical and behavioral components codevelop and coevolve. ontogenetic requirements in one domain are satisfied in part by prior or concurrent developments in another. this work explores how characteristic growth patterns in two primate groups interact with ecological, social, and other life-history constraints to promote the development of particular systems of agonistic relationship. first, the markedly size-dimorphic savanna baboons are contrasted with r ... | 1995 | 31936944 |
| photopigments underlying color vision in ringtail lemurs (lemur catta) and brown lemurs (eulemur fulvus). | a recent examination of color vision in the ringtail lemur produced evidence that these prosimians could make color discriminations consistent with a diagnosis of trichromatic color vision. however, it was unclear if this behavior reflected the presence of three classes of cone or whether lemurs might be able to utilize signals from rods in conjunction with those from only two classes of cone. to resolve that issue, spectral sensitivity functions were obtained from ringtail lemurs (lemur catta) ... | 1993 | 31937014 |
| species traits and hotspots associated with ross river virus infection in nonhuman vertebrates in south east queensland. | ross river virus (rrv) is a mosquito-borne zoonotic arbovirus associated with high public health and economic burdens across australia, but particularly in south east queensland (seq). despite this high burden, humans are considered incidental hosts. transmission of rrv is maintained among mosquitoes and many nonhuman vertebrate reservoir hosts, although the relative contributions of each of these hosts are unclear. to clarify the importance of a range of vertebrates in rrv transmission in seq, ... | 2020 | 32996845 |
| endozoochorous dispersal of forest seeds by carnivorous mammals in sierra fría, aguascalientes, mexico. | some carnivorous mammals ingest fruit and disperse seeds of forest plant species capable of colonizing disturbed areas in ecosystems. the objective of the present study was to evaluate the dissemination of arctostaphylos pungens and juniperus deppeana seeds by the gray fox (urocyon cinereoargenteus), coyote (canis latrans), and other carnivores in the protected natural area sierra fría, in aguascalientes, mexico. scat collection was undertaken via transects using the direct search method, while ... | 2020 | 32211171 |
| substantial reduction in thermo-suitable microhabitat for a rainforest marsupial under climate change. | increases in mean temperatures caused by anthropogenic climate change increase the frequency and severity of temperature extremes. although extreme temperature events are likely to become increasingly important drivers of species' response to climate change, the impacts are poorly understood owing mainly to a lack of understanding of species' physiological responses to extreme temperatures. the physiological response of pseudochirops archeri (green ringtail possum) to temperature extremes has be ... | 2018 | 30958243 |
| dynamic occupancy modelling reveals a hierarchy of competition among fishers, grey foxes and ringtails. | determining how species coexist is critical for understanding functional diversity, niche partitioning and interspecific interactions. identifying the direct and indirect interactions among sympatric carnivores that enable their coexistence is particularly important to elucidate because they are integral for maintaining ecosystem function. we studied the effects of removing nine fishers (pekania pennanti) on their population dynamics and used this perturbation to elucidate the interspecific inte ... | 2018 | 29282715 |
| survey of local fauna from endemic areas of northern queensland, australia for the presence of mycobacterium ulcerans. | buruli ulcer (bu), regionally known as the daintree ulcer or bairnsdale ulcer is caused by the environmental pathogen mycobacterium ulcerans (mu). this disease is characterized by extensive and painless necrosis of skin and soft tissue with the formation of large ulcers and has been reported in >33 countries worldwide. this organism is geographically restricted and in australia, the disease has been reported primarily in coastal victoria and the mossman-daintree areas of northern queensland. aus ... | 2019 | 30860179 |
| milk consumption and growth in a marsupial arboreal folivore, the common ringtail possum, pseudocheirus peregrinus. | this study examines the milk consumption and growth energetics of the smallest arboreal folivore in australia, pseudocheirus peregrinus. mass increase was sigmoidal, and young ceased sucking milk between 27 and 30 wk (mean = 29.3 +/- 1 wk). this length of lactation was 129% of that predicted allometrically from data for other marsupials. the mean gompertz constant (0.01) calculated for seven young suggests that p. peregrinus has a slow rate of growth compared with other marsupial species. milk i ... | 2006 | 9361143 |
| quantitative urinary excretion of unmetabolised n tau-[me-14c] methylhistidine by the common ringtail possum (pseudocheirus peregrinus) marsupialia. | six common ringtail possums (pseudocheirus peregrinus) were intravenously injected with a standard dose of radioactive 3-methylhistidine (n tau-[me-14c]meh). the dose was rapidly and quantitatively excreted by the possums. more than 90% of radioactivity was recovered within 3 days. thin layer chromatography and mass spectroscopy showed that 97% of recovered radioactivity was associated with unmetabolised n tau-[me-14c]meh. these data satisfy two key requirements for the validity of urinary 3-met ... | 1996 | 8858839 |
| histological and immunohistological investigation of alimentary tract lymphoid tissue in the koala (phascolarctos cinereus), brushtail possum (trichosurus vulpecula) and ringtail possum (pseudocheirus peregrinus). | the histological appearance and distribution of t cells, b cells and plasma cells were investigated for oropharyngeal tonsils, small intestinal lymphoid aggregations (peyer's patches), caecocolic lymphoid patches and mesenteric lymph nodes of koalas (phascolarctos cinereus), common brushtail possums (trichosurus vulpecula) and common ringtail possums (pseudocheirus peregrinus). the histological organisation and distribution of lymphoid cell subpopulations of these tissues were similar to those d ... | 1996 | 8621326 |
| the distribution of organised lymphoid tissue in the alimentary tracts of koalas (phascolarctos cinereus) and possums (trichosurus vulpecula and pseudocheirus peregrinus). | the anatomical arrangement of organised lymphoid tissues of the alimentary tract for 3 australian marsupials, the koala (phascolarctos cinereus), the common brushtail possum (trichosurus vulpecula and the common ringtail possum (pseudocheirus peregrinus), was determined by gross dissection and acetic acid treatment. oropharyngeal tonsils were consistently found in the dorsolateral wall of the caudal oropharynx in all 3 species and additionally in the ventral soft palate of the koala. aggregated ... | 1996 | 8621325 |
| energy allocation for reproduction in a marsupial arboreal folivore, the common ringtail possum (pseudocheirus peregrinus). | this study examines the annual energetics of a small folivorous marsupial, pseudocheirus peregrinus. particular attention was given to the energy and time allocated to reproduction by the females. daily energy expenditure was measured directly using the doubly labelled water technique. energy transferred to the young via the milk was estimated from information on milk composition and production. there was no significant seasonal variation in the energy expenditure or water influx of males or fem ... | 1995 | 28306981 |
| metabolic fate of dietary terpenes fromeucalyptus radiata in common ringtail possum (pseudocheirus peregrinus). | arboreal marsupials consume terpenes in quantities that are toxic to other mammals, indicating that they possess special detoxification mechanisms. the metabolic fate of dietary terpenes was studied in the common ringtail possum (pseudocheirus peregrinus). three animals were fedeucalyptus radiata leaf for 10 days. leaf consumption increased over three days to an average steady state of about 10-15 mmol total terpenes per day. gcms analysis identified six urinary terpene metabolites, which were d ... | 1993 | 24249230 |
| effect of dietary terpenes on glucuronic acid excretion and ascorbic acid turnover in the brushtail possum (trichosurus vulpecula). | 1. glucuronic acid was excreted in the urine of the brushtail possum, trichosurus vulpecula, in response to dietary terpenes (essential oils found in eucalyptus foliage). 2. the relationship between urinary glucuronic acid and the estimated terpene content of the diet was not equimolar, but varied from 1-17%, with levels of 5-39% found in animals maintained on terpenes or eucalypt leaves for several weeks. 3. blood levels of ascorbate and the turnover rate of ascorbate were increased in the brus ... | 1988 | 3356132 |
| karyotypes, constitutive heterochromatin and taxonomy of ringtail opossums of the genus pseudocheirus (marsupialia: petauridae). | karyotypes are presented for three forms of the common ringtail oppossum, pseudocheirus peregrinus. these are tentatively regarded as the subspecies p.p. cookii, p.p. pulcher, and p.p. rubidus. in addition, we report for the first time the karyotype of the rock ringtail oppossum, p. dahli. the three forms of p. peregrinus each have a diploid number of 2n=20. c-banding studies indicate that the addition of large blocks of constitutive heterochromatin has played a major role in the evolution of al ... | 1980 | 7190484 |
| comparative physiology of the vertebrate autonomic nervous system. ii. innervation of the urinary bladder of the ringtail possum (pseudocheirus peregrinus). | | 1963 | 14062622 |
| serological evidence for the presence of wobbly possum disease virus in australia. | wobbly possum disease virus (wpdv) is an arterivirus that was originally identified in common brushtail possums (trichosurus vulpecula) in new zealand, where it causes severe neurological disease. in this study, serum samples (n = 188) from australian common brushtail, mountain brushtail (trichosurus cunninghami) and common ringtail (pseudocheirus peregrinus) possums were tested for antibodies to wpdv using elisa. antibodies to wpdv were detected in possums from all three species that were sampl ... | 2020 | 32750064 |
| the gaits of marsupials and the evolution of diagonal-sequence walking in primates. | documenting the variety of quadrupedal walking gaits in a variety of marsupials (arboreal vs. terrestrial, with and without grasping hind feet), to aid in developing and refining a general theory of gait evolution in primates. | 2020 | 31762016 |
| curious creatures: a multi-taxa investigation of responses to novelty in a zoo environment. | the personality trait of curiosity has been shown to increase welfare in humans. if this positive welfare effect is also true for non-humans, animals with high levels of curiosity may be able to cope better with stressful situations than their conspecifics. before discoveries can be made regarding the effect of curiosity on an animal's ability to cope in their environment, a way of measuring curiosity across species in different environments must be created to standardise testing. to determine t ... | 2018 | 29568703 |
| facultative hyperthermia during a heatwave delays injurious dehydration of an arboreal marsupial. | heatwaves negatively impact wildlife populations and their effects are predicted to worsen with ongoing global warming. animal mass mortality at extremely high ambient temperature (ta) is evidence for physiological dysfunction and, to aid conservation efforts, improving our understanding of animal responses to environmental heat is crucial. to address this, i measured the water loss, body temperature and metabolism of an australian marsupial during a simulated heatwave. the body temperature of t ... | 2020 | 32054679 |
| the relationship between the floristic composition of rain forests and the abundance of folivorous marsupials in north-east queensland. | three species of folivorous ringtail possums (marsupialia: pseudocheiridae) inhabit higher elevation rain forests on the atherton tablelands, north-east queensland, australia. each possum is thought to specialize on a restricted suite of host plants. it has been hypothesized that the absence of the possums from lowland forests may reflect the absence or 'inappropriate combination' of their host plants in lowland forests. we test this 'floristics hypothesis' using data from published dietary stud ... | 2003 | 30893968 |