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Articoli di riviste sul tema "Dasyurus viverrinus"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 20 febbraio 2023

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1

Luckett, Winter, Nancy Luckett e Tony Harper. "Initiation and early development of the postcanine deciduous dentition in the dasyurid marsupial Dasyurus viverrinus". Memoirs of Museum Victoria 80 (2021): 93–108. http://dx.doi.org/10.24199/j.mmv.2021.80.03.

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There has been disagreement for more than 100 years concerning the presence or absence of deciduous and successional third premolars in the dentition of the Australian dasyurid marsupial Dasyurus viverrinus as well as in other species of the genus Dasyurus. Most authors during the 19th and 20th centuries have considered the missing premolar in Dasyurus to be the third premolar family in both jaws, in part because of the reduction in size of the third deciduous premolar in many other genera of dasyurids. While other authors, found “the deciduous premolar to be constantly present in the young mammary foetus as a small and precociously calcified vestigial tooth”. However, the fate of this deciduous tooth, and its possible successor in later developmental stages, was never described; and the vestigial dp3 and its possible successor were assumed to undergo absorption during foetal life. With access to later developmental stages of Dasyurus viverrinus, via the extensive collections of Professor J.P. Hill, we present new evidence for the later development of dP3 and P3 in both jaws, the probable eruption of the successional P3 in both jaws and evidence that dP2 is the missing tooth in both jaws of this dasyurid species.

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2

Jones, Menna E., e Robert K. Rose. "Dasyurus viverrinus". Mammalian Species 677 (dicembre 2001): 1–9. http://dx.doi.org/10.1644/1545-1410(2001)677<0001:dv>2.0.co;2.

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3

Czarny, N. A., K. E. Mate e J. C. Rodger. "Acrosome stability in the spermatozoa of dasyurid marsupials". Reproduction, Fertility and Development 20, n. 2 (2008): 295. http://dx.doi.org/10.1071/rd07178.

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The spermatozoa of most marsupials lack nuclear stabilising disulfide-bonded protamines found in eutherian mammals. However, disulfide stabilisation has been observed in the acrosome of macropodid (Macropus eugenii) and phalangerid (Trichosurus vulpecula) marsupials. As a result this organelle, which is normally fragile in eutherian mammals, is robust and able to withstand physical and chemical challenge in these marsupials. The present study examined acrosomal characteristics of the spermatozoa of three dasyurid marsupials; the fat-tailed dunnart (Sminthopsis crassicaudata), eastern quoll (Dasyurus viverrinus) and northern quoll (Dasyurus hallucatus). In all species examined Bryan’s staining demonstrated that significant acrosomal loss occurred following physical challenge with osmotic stress, cryopreservation without cryoprotectant and exposure to detergent (Triton-X). Bromobimane staining indicated that the acrosomes of dasyurids lacked stabilising disulfide bonds. As reported for the wallaby and possum, calcium ionophore (A23187) did not induce the acrosome reaction-like exocytosis in dasyurid spermatozoa but treatment with diacylglycerol (DiC8) caused significant acrosome loss at concentrations similar to those effective for other marsupials. The present study found that the spermatozoa of dasyurids are more sensitive to physical challenge than the previously-studied marsupials and we suggest that this is due to the absence of acrosomal stabilising disulfide bonds.

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4

Wainwright, Brandon, e Rory Hope. "Flow Cytometry and Flow Sorting of Metaphase Chromosomes from the Dasyurid Marsupial Dasyurus viverrinus". Australian Journal of Biological Sciences 38, n. 4 (1985): 377. http://dx.doi.org/10.1071/bi9850377.

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Metaphase chromosomes (2n = 14) from D. viverrinus were analysed by flow cytometry and flow sorted into six homogeneous groups. Relative chromosomal DNA contents and distribution frequencies of the groups corresponded closely with values for the karyotype obtained by conventional methods.

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5

Melrose, W. D., A. M. Pearse, D. M. D. Jupe, M. J. Baikie, J. E. Twin e S. L. Bryant. "Haematology of the australian eastern quoll, Dasyurus viverrinus". Comparative Biochemistry and Physiology Part A: Physiology 88, n. 2 (gennaio 1987): 239–41. http://dx.doi.org/10.1016/0300-9629(87)90476-2.

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6

Green, Brian, Jim Merchant e Keith Newgrain. "Milk Composition in the Eastern Quoll, Dasyurus viverrinus (Marsupialia : Dasyuridae)". Australian Journal of Biological Sciences 40, n. 4 (1987): 379. http://dx.doi.org/10.1071/bi9870379.

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The milk constituents of Dasyurus viverrinus, a carnivorous marsupial, exhibited major quantitative and qualitative changes during the course of lactation. The milk produced in the early stages of lactation was dilute, about 13-16070 (w/w) solids before 3 weeks with carbohydrate representing the major fraction. In the latter stages of lactation the milk was concentrated, around 30% solids, and lipid was the predominant fraction. Palmitic acid was the major fatty acid present in early-stage milk but oleic acid became predominant in milk after 10 weeks post-partum. The changes in milk composition in D. viverrinus were similar to those described for the milks of herbivorous marsupials which therefore suggests that this pattern may be uniform throughout the Marsupialia.

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7

King, DR, DR King, LE Twigg, LE Twigg, JL Gardner e JL Gardner. "Tolerance to Sodium Monofluoroacetate in Dasyurids in Western Australia." Wildlife Research 16, n. 2 (1989): 131. http://dx.doi.org/10.1071/wr9890131.

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The tolerances to sodium fluoroacetate (1080) were estimated for Dasyurus geoffroii (LD*50, ca. 7.5 mg 1080 kg-1), D. hallucatus (ca. 7.5 mg kg-1), Antechinus flavipes (ca. 11.0 mg kg-1) and Phascogale calura (ca. 17.5 mg kg-1) from Western Australia and comparisons were made with D. viverrinus (ca. 1.5 mg kg-1) and A. flavipes (ca. 3.5 mg kg-1) from south-eastern Australia. The species from Western Australia have had evolutionary exposure to naturally occurring fluoroacetate and were more tolerant to the toxin than dasyurids from south-eastern Australia, Presumably, they have acquired this tolerance through feeding on prey which had fed on plants containing fluoroacetate.

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8

Hinds, LA, e JC Merchant. "Plasma Prolactin Concentrations throughout Lactation in the Eastern Quoll, Dasyurus viverrinus (Marsupialia: Dasyuridae)". Australian Journal of Biological Sciences 39, n. 2 (1986): 179. http://dx.doi.org/10.1071/bi9860179.

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9

BRYANT, SALLY. "Maintenance and captive breeding of the Eastern quoll Dasyurus viverrinus". International Zoo Yearbook 27, n. 1 (gennaio 1987): 119–24. http://dx.doi.org/10.1111/j.1748-1090.1987.tb01521.x.

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10

BRYANT, SALLY. "Maintenance and captive breeding of the Eastern quoll Dasyurus viverrinus". International Zoo Yearbook 27, n. 1 (18 dicembre 2007): 119–24. http://dx.doi.org/10.1111/j.1748-1090.1988.tb03204.x.

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11

Green, Brian, Jim Merchant e Keith Newgrain. "Lactational Energetics of a Marsupial Carnivore, the Eastern Quoll (Dasyurus viverrinus)". Australian Journal of Zoology 45, n. 3 (1997): 295. http://dx.doi.org/10.1071/zo97003.

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The rates of milk consumption by young of the eastern quoll (Dasyurus viverrinus), a polytocous medium- sized marsupial carnivore, were estimated by means of the 22Na-turnover technique. The mean individual daily rate of milk consumption at seven weeks of age was 0·6 mL, which increased to a peak of 16 mL at about 14 weeks, when the young weighed 130 g. The total amount of milk energy delivered to each young from birth to the commencement of weaning was 4·1 MJ. The digestible energy intake of lactating quolls (± s.d.), 740 ± 117 kJ kg-1 day-1, was nearly double that of non-lactating quolls, 333 ± 75 kJ kg-1 day-1. With such high energy demands during lacation, it is unlikely that a complete litter of six could be successfully reared unless prey are abundant.

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12

Urashima, Tadasu, Yiliang Sun, Kenji Fukuda, Kentaro Hirayama, Epi Taufik, Tadashi Nakamura, Tadao Saito, Jim Merchant, Brian Green e Michael Messer. "Chemical characterization of milk oligosaccharides of the eastern quoll (Dasyurus viverrinus)". Glycoconjugate Journal 32, n. 6 (6 giugno 2015): 361–70. http://dx.doi.org/10.1007/s10719-015-9600-z.

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13

Stannard, Hayley J., e Julie M. Old. "Digestibility of two diet items by captive eastern quolls (Dasyurus viverrinus)". Zoo Biology 32, n. 4 (18 aprile 2013): 417–22. http://dx.doi.org/10.1002/zoo.21073.

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14

Dunlop, Judy, David Peacock, Harry Moore e Mitchell Cowan. "Albinism in Dasyurus species – a collation of historical and modern records". Australian Mammalogy 42, n. 1 (2020): 114. http://dx.doi.org/10.1071/am19014.

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A new record of an albino marsupial, the northern quoll (Dasyurus hallucatus), is described and placed in the context of 10 records since 1874 from all four Australian quoll species. Of the 10 previous records, one was D. hallucatus, seven are likely to be D. viverrinus, one D. maculatus and one unknown. The recent record comprises the live capture of a healthy adult female northern quoll from the Pilbara region of Western Australia. Despite the rarity and likely deleterious nature of the albino condition, this animal appeared to be in good health, carrying eight pouch young, and was released at location of capture following tissue sampling for DNA analysis.

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15

Selwood, L. "The Marsupial Blastocyst - a Study of the Blastocysts in the Hill Collection". Australian Journal of Zoology 34, n. 2 (1986): 177. http://dx.doi.org/10.1071/zo9860177.

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Blastocysts in the Hill Collection from Trichosurus vulpecula, Pefrogale penicillata, Macropus ruficollis (= M. rufogriseus), Macropus parma, Onychogalea fraenata, Bettongia gaimardi, Perameles obesula (=lsoodon obesulus), Perameles nasuta, Dasyurus viverrinus, Didelphis aurita (=D. marsupialis) and Didelphis virginiana were examined. They ranged from incomplete unilaminar blastocysts to late bilaminar blastocysts. The mode of formation of the unilaminar blastocyst appeared to be influenced by the presence or absence of the yolk mass. A unilaminar blastocyst lined by uniform protoderm cells occurred in a wide variety of marsupials. Differentiation of the unilaminar blastocyst into embryonic and extra-embryonic areas occurred at different stages of development. In macropodids and Didelphis it was found in small blastocysts soon after blastocyst completion. In dasyurids, Perameles and some other groups it was found in larger blastocysts, at least four cell generations after blastocyst completion. The first histological signs of differentiation of the unilaminar blastocyst into embryonic and extra-embryonic areas varied between different marsupials. In Didelphis, enlarged endoderm mother cells developed from the protoderm cells of one hemisphere. The protoderm cells of this hemisphere later differentiated as embryonic ectoderm and the endoderm mother cells gave rise to the primary endoderm. In D. viverrinus, bandicoots and T. vulpecula, the protoderm cells of one hemisphere differentiated simultaneously into cuboidal embryonic ectoderm and endoderm mother cells. In P. penicillata, M. ruficollis and M. parma the protoderm cells of one hemisphere proliferated to form a multilayered embryonic area which later differentiated into embryonic ectoderm and primary endoderm.

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16

Peacock, David, e Ian Abbott. "The role of quoll (Dasyurus) predation in the outcome of pre-1900 introductions of rabbits (Oryctolagus cuniculus) to the mainland and islands of Australia". Australian Journal of Zoology 61, n. 3 (2013): 206. http://dx.doi.org/10.1071/zo12129.

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We investigated two questions: Why did most historical releases of rabbits on the Australian mainland fail? And why did many releases of rabbits on islands around Australia persist? We reviewed historical sources and present here nearly 300 records of the importation, sale, transportation and release of rabbits in the period 1788–1900, with >90 records before the popularly cited 1859 Barwon Park (near Geelong, Victoria) release by Thomas Austin. Similarly, we present records of localised impact of quolls (especially Dasyurus viverrinus) on rabbits and poultry, indicative of the great abundance of quolls. Rabbits were often imported and traded and releases were frequent and widespread. This evidence implicates native predators, particularly quolls (Dasyurus spp.) as responsible for the widespread and early failure of rabbits to establish on mainland Australia. In contrast, rabbits thrived on many islands, nearly all of which lacked cursorial natural enemies. We suggest that these accounts support the establishment of rabbits from several locations, with Barwon Park being a primary location and rabbit source.

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17

Wroe, S. "Maximucinus muirheadae, gen. et sp. nov. (Thylacinidae : Marsupialia), from the Miocene of Riversleigh, north-western Queensland, with estimates of body weights for fossil thylacinids". Australian Journal of Zoology 49, n. 6 (2001): 603. http://dx.doi.org/10.1071/zo01044.

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An eighth genus and twelfth species of Tertiary thylacinid is described. This new taxon represents the seventh member of the family from the fossiliferous Carl Creek limestones of Riversleigh, north-western Queensland. Although plesiomorphic within Thylacinidae regarding most features and lacking synapomorphies that unambiguously unite it with specialised taxa within the family, it possesses two autapomorphies. With an estimated body weight of around 18 kg it is also larger than any previously known thylacinid predating the late Miocene. Body-weight estimates for remaining fossil Thylacinidae span a wide range from just over 1 kg to almost 60 kg. While the smallest species is comparable to the extant Dasyurus viverrinus in size, most (i.e. 9 of 12 taxa) are at least twice the average size of the living Dasyurus maculatus. These results suggest that trophic diversity among thylacinids is even greater than previously thought and detract from the argument that reptiles have dominated large terrestrial carnivore niches in Australia since at least early Miocene times.

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18

Bryant, S. L. "Testosterone-LH response and episodic secretion in the male marsupial, Dasyurus viverrinus". General and Comparative Endocrinology 87, n. 3 (settembre 1992): 410–15. http://dx.doi.org/10.1016/0016-6480(92)90048-o.

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19

Dorph, Annalie, e Paul G. McDonald. "The acoustic repertoire and behavioural context of the vocalisations of a nocturnal dasyurid, the eastern quoll (Dasyurus viverrinus)". PLOS ONE 12, n. 7 (7 luglio 2017): e0179337. http://dx.doi.org/10.1371/journal.pone.0179337.

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20

Messer, M., P. A. Fitzgerald, J. C. Merchant e B. Green. "Changes in milk carbohydrates during lactation in the eastern quoll, Dasyurus viverrinus (marsupialia)". Comparative Biochemistry and Physiology Part B: Comparative Biochemistry 88, n. 4 (gennaio 1987): 1083–86. http://dx.doi.org/10.1016/0305-0491(87)90009-5.

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21

Fancourt, Bronwyn A., Clare E. Hawkins e Stewart C. Nicol. "Evidence of rapid population decline of the eastern quoll (Dasyurus viverrinus) in Tasmania". Australian Mammalogy 35, n. 2 (2013): 195. http://dx.doi.org/10.1071/am13004.

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Australia’s mammalian fauna has suffered unparalleled extinctions and declines in recent history. Tasmania has remained largely unaffected by these losses; however, marsupial dynamics are changing rapidly and new threats are emerging. Once abundant throughout south-eastern Australia, the eastern quoll (Dasyurus viverrinus) survives only in Tasmania. Until recently, it was considered widespread and common, but it may be undergoing a rapid and severe decline. The aim of this study was to quantify changes in eastern quoll populations over recent years. Data were compiled from statewide spotlight surveys, repeated historic trapping surveys and bycatch records from non-target trapping surveys. Spotlight surveys from 150 sites across Tasmania revealed a 52% reduction in the number of eastern quoll sightings over the 10 years to 2009. Declines of 61–100% were observed in trapping surveys at three study sites compared with trapping conducted 18–31 years earlier. A reduction in trap success was recorded in five of six non-target surveys, with declines of 51–100% over 1–12 years. These results suggest that the eastern quoll can no longer be presumed secure in Tasmania. Urgent management action may be needed to ensure the future conservation of the species in its last remaining stronghold.

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22

Frankham, Greta J., Sean Thompson, Sandy Ingleby, Todd Soderquist e Mark D. B. Eldridge. "Does the ‘extinct’ eastern quoll (Dasyurus viverrinus) persist in Barrington Tops, New South Wales?" Australian Mammalogy 39, n. 2 (2017): 243. http://dx.doi.org/10.1071/am16029.

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The eastern quoll (Dasyurus viverrinus) is believed to be extinct on the Australian mainland, with the last confirmed record in 1963. Recently an eastern quoll specimen was located that had been found in northern Barrington Tops National Park (200 km north of Sydney) in 1989. Partial sequences (~200 bp) of the mitochondrial DNA gene Cytochrome b were obtained from the Barrington Tops specimen and compared with sequences from known mainland and Tasmanian eastern quolls. The genetic data, while limited, are most consistent with the Barrington Tops specimen being derived from the ‘extinct’ mainland eastern quoll population. This suggests that eastern quolls survived for decades longer on the Australian mainland than previously thought and raises the possibility that they may still persist in remote areas such as Barrington Tops.

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23

Jones, Menna E., Georgina C. Smith e Susan M. Jones. "Is anti-predator behaviour in Tasmanian eastern quolls (Dasyurus viverrinus) effective against introduced predators?" Animal Conservation 7, n. 2 (maggio 2004): 155–60. http://dx.doi.org/10.1017/s136794300400126x.

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24

Hope, Ben, Todd Soderquist e Mark D. B. Eldridge. "Eastern quoll (Dasyurus viverrinus Shaw, 1800): a review of recent sightings on mainland Australia". Australian Mammalogy 42, n. 2 (2020): 144. http://dx.doi.org/10.1071/am18024.

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Whether the eastern quoll (Dasyurus viverrinus) is extinct on mainland Australia, particularly New South Wales (NSW), is the focus of this study. The species declined rapidly during the mid to late 1800s in parts of south-east Australia and in the early 1900s around Bega (New South Wales). The last definite live individual was recorded at Vaucluse, NSW in 1963. The recent emergence of a specimen from Barrington Tops, NSW, in 1989 caused much public interest and enabled us to seek reports of sightings after we advertised publicly for any records. Here we document numerous post-1963 records, the most noteworthy including: a photograph of an eastern quoll (reported to be taken in 2013 in the Nungatta area of NSW), records from Wollemi National Park (2002 and 2006) and multiple observations from the 1990s from around Barrington Tops and Carrai. There has been insufficient recent mammal survey effort to definitively support these public reports but at this stage there are sufficient recent credible records to consider that this species may not be extinct on mainland Australia.

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Hinds, L. A. "Plasma progesterone through pregnancy and the estrous cycle in the eastern quoll, Dasyurus viverrinus". General and Comparative Endocrinology 75, n. 1 (luglio 1989): 110–17. http://dx.doi.org/10.1016/0016-6480(89)90015-4.

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Fancourt, Bronwyn A. "Rapid decline in detections of the Tasmanian bettong (Bettongia gaimardi) following local incursion of feral cats (Felis catus)". Australian Mammalogy 36, n. 2 (2014): 247. http://dx.doi.org/10.1071/am14004.

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An abrupt decline in the number of Tasmanian bettongs (Bettongia gaimardi) was observed as part of a study investigating population declines in the eastern quoll (Dasyurus viverrinus). Seven remote camera surveys were undertaken at a monitoring site between February 2012 and October 2013. An 11% reduction in bettong detections was observed immediately following the first appearance of feral cats (Felis catus) (at least three individuals) at the site. Within four months, bettong detections had fallen by 58% and by 100% within six months. No bettongs were detected in subsequent surveys undertaken 10, 12 and 16 months after cats were first observed. Cat predation and toxoplasmosis are discussed as mechanisms possibly responsible for the local disappearance of bettongs from this site, together with implications for the future management and conservation of the species.

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Melrose, W. D., A. M. Pearse, P. A. Bell, D. M. D. Jupe, M. J. Baikie, J. E. Twin e S. L. Bryant. "Haematology of the Australian Eastern quoll, Dasyurus viverrinus—II. Red cell enzymes and metabolic intermediates". Comparative Biochemistry and Physiology Part B: Comparative Biochemistry 97, n. 1 (gennaio 1990): 47–48. http://dx.doi.org/10.1016/0305-0491(90)90175-s.

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Harman, AM, DP Crewther, JE Nelson e SG Crewther. "Retinal Projections in the Northern Native Cat, Dasyurus-Hallucatus (Marsupialia, Dasyuridae)". Australian Journal of Zoology 35, n. 2 (1987): 115. http://dx.doi.org/10.1071/zo9870115.

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The retinal projections of the northern native cat, Dasyurus hallucatus, were studied by the anterograde transport of tritiated proline and by autoradiography. Seven regions in the brain were found to receive direct retinal projections: (1) the suprachiasmatic nucleus; (2) the dorsal lateral geniculate nucleus; (3) the ventral lateral geniculate nucleus; (4) the lateral posterior nucleus; (5) the nuclei of the accessory optic tract; (6) the pretectal nuclei; (7) the superior colliculus. All nuclei studied received a bilateral retinal projection except the medial terminal nucleus of the accessory optic system, in which only a contralateral input was found. The contralateral eye had a greater input in all cases. As with the related species, Dasyurus viverrinus, there is extensive binocular overlap in the dorsal lateral geniculate nucleus (LGNd). In the LGNd contralateral to the injected eye, the autoradiographs show four contralateral terminal bands occupying most of the nucleus. The axonal terminations in the ipsilateral LGNd are more diffuse but show a faint lamination pattern of four bands. The ventral portion of the LGNd receives only contralateral retinal input, and therefore probably represents the monocular visual field. The other principal termination of the optic nerve, the superior colliculus, has a predominantly contralateral input to both sublayers of the stratum griseum superficiale. However, the ipsilateral fibres terminate only in patches in the more inferior sublayer.

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Sánchez-Villagra, M. R., e Manuela Döttling. "Carpal ontogeny in Dasyurus viverrinus and notes on carpal evolution in the Dasyuromorphia among the Marsupialia". Mammalian Biology 68, n. 6 (2003): 329–40. http://dx.doi.org/10.1078/1616-5047-00102.

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Fancourt, Bronwyn A., Stewart C. Nicol, Clare E. Hawkins, Menna E. Jones e Chris N. Johnson. "Beyond the disease: Is Toxoplasma gondii infection causing population declines in the eastern quoll (Dasyurus viverrinus)?" International Journal for Parasitology: Parasites and Wildlife 3, n. 2 (agosto 2014): 102–12. http://dx.doi.org/10.1016/j.ijppaw.2014.05.001.

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Fletcher, TP. "Aspects of Reproduction in the Male Eastern Quoll, Dasyurus viverrinus (Shaw) (Marsupialia: Dasyuridae), with Notes on Polyoestry". Australian Journal of Zoology 33, n. 2 (1985): 101. http://dx.doi.org/10.1071/zo9850101.

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In captivity, mating activity of quolls reached a peak in late May-early June. Weights of the male accessory glands peaked about the time of mating, after which the glands regressed; in September they weighed considerably less. Weights of testes and epididymides did not vary so much, but by September spermatorrhoea had ceased and the seminiferous tubules had become aspermic. The disseminate prostate gland was divisible histologically into three segments: the anterior and posterior 2 segments had a single cell type in the tubule epithelium; but prostate 1 had two types. The three pairs of Cowper's glands had similar, simple, columnar epithelium. The seminiferous tubules, supported by numerous interstitial cells, were of diameter 360-506 �m. The mature spermatozoon was large, 232 �m long; its flagellum, oval in cross-section, was inserted midway along the wedge-shaped head at the anterior margin of a ventral groove. The gestation period varied from 20 to 24 days; if the first litter was lost early in lactation, the females might return to oestrus. The species is, therefore, polyoestrous. The oestrous cycle of one animal was 34 days.

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Nesseler, Anne, Nicole Schauerte, Christina Geiger, Kerstin Kaerger, Grit Walther, Oliver Kurzai e Tobias Eisenberg. "Sporothrix humicola (Ascomycota: Ophiostomatales) – A soil-borne fungus with pathogenic potential in the eastern quoll (Dasyurus viverrinus)". Medical Mycology Case Reports 25 (settembre 2019): 39–44. http://dx.doi.org/10.1016/j.mmcr.2019.07.008.

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Portas, Timothy J., Maldwyn J. Evans, David Spratt, Paola K. Vaz, Joanne M. Devlin, Amanda Duarte Barbosa, Belinda A. Wilson et al. "BASELINE HEALTH AND DISEASE ASSESSMENT OF FOUNDER EASTERN QUOLLS (DASYURUS VIVERRINUS) DURING A CONSERVATION TRANSLOCATION TO MAINLAND AUSTRALIA". Journal of Wildlife Diseases 56, n. 3 (2 luglio 2020): 547. http://dx.doi.org/10.7589/2019-05-120.

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Fancourt, Bronwyn A., e Stewart C. Nicol. "Hematologic and serum biochemical reference intervals for wild eastern quolls (Dasyurus viverrinus): Variation by age, sex, and season". Veterinary Clinical Pathology 48, n. 1 (25 febbraio 2019): 114–24. http://dx.doi.org/10.1111/vcp.12703.

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35

Jones, Menna E., Gordon C. Grigg e Lyn A. Beard. "Body Temperatures and Activity Patterns of Tasmanian Devils (Sarcophilus harrisii) and Eastern Quolls (Dasyurus viverrinus) through a Subalpine Winter". Physiological Zoology 70, n. 1 (gennaio 1997): 53–60. http://dx.doi.org/10.1086/639541.

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36

Bryant, S. L. "Seasonal variation of plasma testosterone in a wild population of male Eastern quoll, Dasyurus viverrinus (Marsupialia: Dasyuridae), from Tasmania". General and Comparative Endocrinology 64, n. 1 (ottobre 1986): 75–79. http://dx.doi.org/10.1016/0016-6480(86)90030-4.

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37

Cardoso, Maria J., Nick Mooney, Mark D. B. Eldridge, Karen B. Firestone e William B. Sherwin. "Genetic monitoring reveals significant population structure in eastern quolls: implications for the conservation of a threatened carnivorous marsupial". Australian Mammalogy 36, n. 2 (2014): 169. http://dx.doi.org/10.1071/am13035.

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Abstract (sommario):

The eastern quoll (Dasyurus viverrinus), while still relatively abundant in Tasmania, is now threatened by the recently introduced European red fox (Vulpes vulpes). Due to a lack of demographic information on eastern quolls, molecular data become a crucial surrogate to inform the management of the species. The aim of this study was to acquire baseline genetic data for use in current and future conservation strategies. Genetic variation, at seven microsatellite loci, was lower in Tasmanian eastern quolls than in quoll species from the Australian mainland. Within Tasmania, genetic variation was greater in central than peripheral populations, with the lowest levels detected on Bruny Island. Significant genetic population structure, consistent with regional differentiation, appears related to geographic distance among populations. Levels of gene flow appeared moderate, with genetic admixture greatest among central populations. Therefore, eastern quolls from genetically diverse central Tasmanian populations will become an important source for conservation initiatives if widespread declines begin to occur. Ongoing genetic monitoring of existing populations will allow conservation strategies to be adaptive. However, in order for translocations to be successful, managers must not only consider the genetic composition of founding individuals, but also habitat-specific adaptations, disease and threatening processes at translocation sites.

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Twin, J. E., e A. M. Pearse. "A malignant mixed salivary tumour and a mammary carcinoma in a young wild eastern spotted native cat Dasyurus viverrinus (marsupialia)". Journal of Comparative Pathology 96, n. 3 (maggio 1986): 301–6. http://dx.doi.org/10.1016/0021-9975(86)90050-2.

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39

Peacock, David, e Ian Abbott. "When the ‘native cat’ would ‘plague’: historical hyperabundance in the quoll (Marsupialia : Dasyuridae) and an assessment of the role of disease, cats and foxes in its curtailment". Australian Journal of Zoology 62, n. 4 (2014): 294. http://dx.doi.org/10.1071/zo14029.

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Abstract (sommario):

Since the European settlement of Australia in 1788, 25 mainland terrestrial mammal species have become extinct, more than on any other continent during this period. To determine if the causal factors are still active, it is necessary to better understand the species and their status preceding these regional extirpations or extinctions, and examine the historical record for clues to the cause(s) of these declines. From an extensive review of historical material, primarily newspaper accounts, we collated >2700 accounts of quolls. We discovered 36 accounts that demonstrate the propensity for quolls to become hyperabundant. The geographical distribution of accounts implies that most refer to Dasyurus viverrinus, but an account from Normanton district (Queensland) likely applies to D. hallucatus. More than 110 accounts demonstrate that disease/parasite epizootics occurred in south-eastern Australia, commencing on mainland Australia possibly in the goldfields region of Victoria in the 1850s, or in south-eastern South Australia and south-western Victoria in the mid to late 1860s, and implicate these as the initial primary factor in the regional extirpation of Australia’s quolls. The loss of D. viverrinus populations in south-eastern Australia was reportedly from population abundances and densities that were sporadically extraordinarily high, hence their loss appears more pronounced than previously suspected. Accounts describing the widespread, rapid and major loss of quolls suggest the possible involvement of several pathogens. Ectoparasites such as Uropsylla tasmanica and ticks appear to be described in detail in some accounts. A few others state comortality of Felis catus and Canis lupus familiaris, suggestive of a disease of either or both of these species, such as Canine Distemper Virus, a morbillivirus with a propensity to be non-host specific, that may have caused the decline of the quolls, perhaps vectored by the reported ectoparasites. We also collated 23 presumed independent accounts of cats negatively impacting quolls, two of which describe significant mortality, and three presumed independent accounts of fox predation. These highlight the capacity of both of these introduced predators to have reduced quoll distribution and abundance.

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40

Robinson, Natasha M., Wade Blanchard, Christopher MacGregor, Rob Brewster, Nick Dexter e David B. Lindenmayer. "Finding food in a novel environment: The diet of a reintroduced endangered meso-predator to mainland Australia, with notes on foraging behaviour". PLOS ONE 15, n. 12 (17 dicembre 2020): e0243937. http://dx.doi.org/10.1371/journal.pone.0243937.

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Abstract (sommario):

Translocated captive-bred predators are less skilled at hunting than wild-born predators and more prone to starvation post-release. Foraging in an unfamiliar environment presents many further risks to translocated animals. Knowledge of the diet and foraging behaviour of translocated animals is therefore an important consideration of reintroductions. We investigated the diet of the endangered meso-predator, the eastern quoll Dasyurus viverrinus. We also opportunistically observed foraging behaviour, enabling us to examine risks associated with foraging. Sixty captive-bred eastern quolls were reintroduced to an unfenced reserve on mainland Australia (where introduced predators are managed) over a two year period (2018, 2019). Quolls were supplementary fed macropod meat but were also able to forage freely. Dietary analysis of scats (n = 56) revealed that quolls ate macropods, small mammals, birds, invertebrates, fish, reptiles and frogs, with some between-year differences in the frequency of different diet categories. We also observed quolls hunting live prey. Quolls utilised supplementary feeding stations, indicating that this may be an important strategy during the establishment phase. Our study demonstrated that, in a novel environment, captive-bred quolls were able to locate food and hunt live prey. However, foraging was not without risks; with the ingestion of toxic substances and foraging in dangerous environments found to be potentially harmful. Knowledge of the diet of reintroduced fauna in natural landscapes is important for understanding foraging behaviour and evaluating habitat suitability for future translocations and management.

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Hill, J. P., e W. C. Osman Hill. "The growth-stages of the pouch-young of the Native Cat (Dasyurus viverrinus) together with observations on the anatomy of the new-born young.*". Transactions of the Zoological Society of London 28, n. 5 (7 luglio 2010): 349–52. http://dx.doi.org/10.1111/j.1096-3642.1955.tb00003.x.

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42

Belcher, C. A. "Susceptibility of the tiger quoll, Dasyurus maculatus, and the eastern quoll, D. viverrinus, to 1080-poisoned baits in control programmes for vertebrate pests in eastern Australia". Wildlife Research 25, n. 1 (1998): 33. http://dx.doi.org/10.1071/wr95077.

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Abstract (sommario):

Captive trials were undertaken to determine whether tiger quolls and eastern quolls could detect baits that were either buried or covered with soil following the methods employed in normal buried-poisoned-bait programmes. Both tiger quolls and eastern quolls detected, dug up and consumed buried FOXOFF baits. Consumption trials showed that tiger quolls were capable of consuming 2–3 FOXOFF baits in a single meal and more than three baits overnight. Eastern quolls could consume up to 1.5 baits in a single meal. Field trials were undertaken to investigate whether tiger quolls in the wild could also detect and consume buried baits. Trials with both fresh meat and FOXOFF baits were undertaken at a site near a tiger quoll latrine, using a remote camera to record visits to the site and bait uptake. The results confirmed that tiger quolls in the wild can detect and consume both fresh meat and FOXOFF baits that have been buried or placed on the surface and covered with soil to a depth of 5–8 cm. The results indicate that the buried-bait technique is not specific for introduced predators, and free- feeding may not preclude non-target species from taking buried baits. Reliance on the identification of the species visiting bait stations from tracks may also be unreliable as foxes dug up bait stations searching for baits, even after the bait had been removed, potentially obliterating other tracks.

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43

Fancourt, Bronwyn A. "Diagnosing species decline: a contextual review of threats,causes and future directions for management and conservation of the eastern quoll". Wildlife Research 43, n. 3 (2016): 197. http://dx.doi.org/10.1071/wr15188.

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Abstract (sommario):

Diagnosing the cause of a species’ decline is one of the most challenging tasks faced by conservation practitioners. For a species approaching extinction, it is not possible to go back in time to measure the agents that operated at various stages of the decline. Accordingly, managers are often restricted to measuring factors currently affecting residual populations, which may not be related to factors that operated earlier in the decline, and inferring other mechanisms from different lines of evidence. In this review, I adopt a methodical diagnostic framework to comprehensively evaluate the potential causal factors for the decline of the eastern quoll (Dasyurus viverrinus) in Tasmania, and propose a hypothesis as to the cause of decline. Potential causal agents were gleaned from two key sources: factors implicated in the eastern quoll’s historical demise on the Australian mainland, and factors that changed during the recent period of quoll decline in Tasmania. The three most likely candidate causal agents were investigated over 4 years to evaluate their likely contribution to the decline. Here, I synthesise the findings from this recent research to advance a hypothesis as to the cause of the eastern quoll decline in Tasmania. I suggest that a period of unsuitable weather reduced quoll populations to an unprecedented low abundance, and that populations are now too small to overcome established threat intensities to which they were robust when at higher densities. Residual small populations are inherently more susceptible to demographic, environmental and genetic stochasticity and are unlikely to recover without management intervention. I propose a study design to experimentally test this hypothesis, and outline priority areas for future research and actions to guide in the future management and conservation of the species. This case study illustrates an approach by which practical species conservation problems might be solved and recovery strategies may be better informed, thereby ensuring positive conservation outcomes for threatened species.

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Fancourt, Bronwyn A., Clare E. Hawkins e Stewart C. Nicol. "Mechanisms of climate-change-induced species decline: spatial, temporal and long-term variation in the diet of an endangered marsupial carnivore, the eastern quoll". Wildlife Research 45, n. 8 (2018): 737. http://dx.doi.org/10.1071/wr18063.

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Abstract (sommario):

Context Climate change is having significant impacts on species worldwide. The endangered eastern quoll (Dasyurus viverrinus) has recently undergone rapid and severe population decline, with no sign of recovery. Spatially and temporally-explicit weather modelling suggests a prolonged period of unfavourable weather conditions during 2001–03 as the proximate cause of decline. However, the mechanisms of this weather-induced decline are not currently understood. Aims The aim of this study was to investigate the hypothesis that changing weather conditions have altered the availability of key prey species, potentially contributing to the species’ decline. Methods We analysed 229 scats collected from 125 individual wild quolls across four sites between July 2011 and May 2012. Variation in dietary composition and niche breadth was compared across sites and seasons. We also compared contemporary dietary composition and niche breadth to historic dietary studies performed before the species’ decline, to identify any key changes in dietary composition over time. Key results Dietary composition and niche breadth were similar across sites but differed between seasons. Dietary niche contracted during winter (July) and early spring (September) when insect larvae formed the bulk of quoll diet, rendering the species vulnerable to weather-related fluctuations in food availability at that time. Large differences were also evident between current and historic dietary composition, with a marked shift from insect larvae to mammals, predominantly due to a reduction in corbie (Oncopera intricata) and southern armyworm (Persectania ewingii) moth larvae. Quoll abundance appears positively related to corbie larva abundance during winter, and both quoll and corbie larva abundance appear negatively related to winter rainfall. Conclusions The lower contribution of insects at sites with low quoll densities suggests that insects represent an important food item for eastern quolls during winter, when dietary niche is narrowest and energy demands are highest. Our findings suggest that weather-induced fluctuations in quoll abundance, including the significant statewide decline during 2001–03, are potentially driven by weather-induced fluctuations in corbie larva abundance. Implications Continued deterioration in climatic suitability with recent and predicted climate change could further threaten eastern quolls through reductions in the availability and stability of reliable food sources at critical life-history stages when dietary options are already limited.

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45

"Dasyurus viverrinus". Mammalian Species, 26 dicembre 2001. http://dx.doi.org/10.2307/0.677.1.

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46

Ferner, Kirsten. "Early postnatal lung development in the eastern quoll (Dasyurus viverrinus)". Anatomical Record, 31 marzo 2021. http://dx.doi.org/10.1002/ar.24623.

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47

Shopland, Sara, Mark F. Stidworthy, Daniela Denk, Rowena Killick, Richard Saunders, Anja Lange-Garbotz e Angela Fadda. "EARLY-ONSET LEUKOENCEPHALOMYELOPATHY AND POLYNEUROPATHY IN EASTERN QUOLLS (DASYURUS VIVERRINUS) IN THE EUROPEAN CAPTIVE POPULATION". Journal of Zoo and Wildlife Medicine 51, n. 4 (12 gennaio 2021). http://dx.doi.org/10.1638/2020-0056.

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48

Kennedy, GerardA, GrahameJ Coleman e StuartM Armstrong. "The effect of restricted feeding on the wheel-running activity rhythms of the predatory marsupial Dasyurus viverrinus". Journal of Comparative Physiology A 166, n. 5 (marzo 1990). http://dx.doi.org/10.1007/bf00240010.

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49

Hope, Ben, Rohan J. Bilney e Jess Peterie. "Targeted survey for the eastern quoll (Dasyurus viverrinus) in the Nungatta and Yambulla areas of southern New South Wales". Australian Mammalogy, 2021. http://dx.doi.org/10.1071/am20060.

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50

Ferner, Kirsten. "Development of the skin in the eastern quoll ( Dasyurus viverrinus ) with focus on cutaneous gas exchange in the early postnatal period". Journal of Anatomy, 25 settembre 2020. http://dx.doi.org/10.1111/joa.13316.

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