Academic literature on the topic 'Dasyurid marsupial'
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Journal articles on the topic "Dasyurid marsupial"
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Luckett, Winter, Nancy Luckett, and 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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Westerman, M., and PA Woolley. "Cytogenetics of Some New Guinean Dasyurids and Genome Evolution in the Dasyuridae (Marsupialia)." Australian Journal of Zoology 37, no. 5 (1989): 521. http://dx.doi.org/10.1071/zo9890521.
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Karyotypes have been obtained for ten species of New Guinean dasyurid marsupials. All species have 2n = 14 chromosomes which, except for variation in size and shape of the X chromosome, are similar in morphology, not only between species but also to Australian species. The Y chromosome of all species is punctiform. C- and G-banding procedures have been applied to eight of the species and show (1) there are no major differences between species in amounts of C-band heterochromatin, and (2) the G-band patterns of the autosomes were virtually identical. These findings suggest that there have been no major karyotypic changes accompanying speciation of dasyurids in New Guinea. Since the G-banded karyotypes are also virtually identical to those reported for Australian dasyurids it would appear that this 2n = 14 karyotype probably represents the ancestral dasyurid form which can be derived as a result of a few inversions from an ancestral marsupial karyotype. These changes must have occurred very early in the dasyurid radiation as the) are found in all extant species and genera examined. However, virtually identical G-banded karyotypes may mask major differences in nuclear DNA values.
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Dickman, Christopher R., Aaron C. Greenville, Glenda M. Wardle, and Jenna P. Bytheway. "Class Conflict: Diffuse Competition between Mammalian and Reptilian Predators." Diversity 12, no. 9 (September 15, 2020): 355. http://dx.doi.org/10.3390/d12090355.
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(1) Diffuse competition affects per capita rates of population increase among species that exploit similar resources, and thus can be an important structuring force in ecological communities. Diffuse competition has traditionally been studied within taxonomically similar groups, although distantly related intraguild species are likely also to compete to some degree. (2) We assessed diffuse competition between mammalian and reptilian predators at sites in central Australia over 24 years. Specifically, we investigated the effect of dasyurid marsupial abundance on the diet breadth of three groups of lizards (nocturnal dietary generalists, diurnal dietary generalists and dietary specialists). (3) Nocturnal generalist lizards had progressively narrower diets as dasyurid abundance increased. The diet breadth of diurnal generalist lizards was unaffected by overall dasyurid abundance, but was restricted by that of the largest dasyurid species (Dasycercus blythi). Ant- and termite-specialist lizards were unaffected by dasyurid abundance. (4) Diffuse competition, mediated by interference, between dasyurids and nocturnal generalist lizards appears to have strong effects on these lizards, and is the first such between-class interaction to be described. Diffuse interactions may be widespread in natural communities, and merit further investigation among other disparate taxon groups that occur in the same ecological guilds.
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Hughes, R. Leon. "Structure of the female reproductive tract of an adult parous Tasmanian tiger, Thylacinus cynocephalus." Australian Journal of Zoology 48, no. 5 (2000): 487. http://dx.doi.org/10.1071/zo00022.
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The present observations on the now-extinct Thylacinus are based on the reproductive system of an adult thylacine discovered among the specimens of the Hill collection at the Hubrecht Laboratory in the Netherlands. As in other marsupials, the reproductive tract was characterised by the presence of a uterus duplex and a vaginal complex where the ureters passed dorsally over each lateral vaginal canal to enter the bladder. The lateral vaginal canals each entered a urogenital sinus that terminated in a shallow cloaca. The gross dimensions of the reproductive tract of the thylacine were greater than those of any extant dasyurid marsupial. The distance from the rostral pole of the ovaries to the most caudal extremity of the urogenital sinus measured 25 cm. The distinctive aspects of the reproductive tract included a disproportionate enlargement of the corpus uteri that is without parallel in any other marsupial species. The bodies of the right and left uteri measured 10.4 cm 1.2 cm 0.9 cm and 9.1 cm 0.8 cm 0.7 cm respectively. The rostro-caudal length of the right and left cervices measured 2.7 cm and 1.7 cm respectively. The cervical canals entered the vaginal complex by way of a thick median vaginal septum. The elongated caudal component of the vaginal culs-de-sac lacked a median vaginal septum. As in other dasyurid marsupials, the lateral vaginae and associated vaginal complex were of diminutive proportions in relation to the typical marsupial pattern. The histology of the tract was remarkably good for tissue preserved since 1902 and indicated that the tissues were free of pathological changes. A characteristic marsupial pattern of ovarian folliculogenesis was evident where all but a thin peripheral zone of the cytoplasm of the primary oocyte became vacuolated during the pre-antral stage of ovarian follicle development.
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SPRATT, DAVID M. "Description of capillariid nematodes (Trichinelloidea: Capillariidae) parasitic in Australian marsupials and rodents." Zootaxa 1348, no. 1 (October 30, 2006): 1. http://dx.doi.org/10.11646/zootaxa.1348.1.1.
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Capillariid nematodes (Trichinelloidea: Capillariidae) parasitic in Australian dasyurid, peramelid and potoroid marsupials and murid rodents are described. Diagnosis of the genus Eucoleus and a key to species are given. Two species are redescribed: E. gastricus (Baylis) and E. rickardi (Beveridge and Barker), comb. nov. Nine species are described as new: E. breviductus sp. nov., E. buckenbourensis sp. nov., E. fluvidus sp. nov., E. longiductus sp. nov., E. parvulus sp. nov., E. perplexus sp. nov., E. plumosus sp. nov., E. posterus sp. nov. and E. pseudoplumosus sp. nov. Three additional species are recognized but not named. Species of Eucoleus occur in a diverse range of epithelial tissue habitats in Australian hosts throughout eastern Australia; one species is known from peramelids in Western Australia. Members of the genus have not been found in any other families of Australian marsupials. Three species are parasites of dasyurids, eight species are parasites of peramelids, two species occur in both dasyurid and peramelid hosts and two species are parasites of murid rodents. Morphologically, species of Eucoleus appear to be reasonably host specific at the family level. Molecular evidence indicates that sibling species of Eucoleus occur in distinct but closely related host species. Baruscapillaria conspecta sp. nov. is described from murid rodents and the potoroid marsupial rufous rat kangaroo, Aepyprymnus rufescens, primarily in north Queensland. Capillaria ornamentata sp. nov. is described from the distal nasal sinus behind the orbit of the eye of species of dasyurids of the genus Antechinus in southeastern Australia. Aonchotheca praeputialis (Obendorf, 1979) comb. nov. is redescribed and appears to occur exclusively in the native Rattus fuscipes. New host and geographic records, and tissue localities of the trichurid nematode, Anatrichosoma haycocki (Trichinelloidea: Trichuridae, Trichosomoidinae) are given.
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Renfree, MB, and AM Lewis. "Cleavage in vivo and in vitro in the Marsupial Macropus eugenii." Reproduction, Fertility and Development 8, no. 4 (1996): 725. http://dx.doi.org/10.1071/rd9960725.
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In the tammar wallaby, transport down the oviduct takes less than 24 h after fertilization and a mucoid coat is deposited within a few hours of fertilization, with excess spermatozoa trapped in the mucoid layer. The mucin coat thickens as the zygote passes down the oviduct. A proteinaceous shell is laid down outside the mucin coat in the utero-tubal region of the tract. The fertilized zygote enters the uterus in the pronuclear stage with cleavage proceeding in the uterus. In vivo, the first cleavage takes place two days post coitum (p.c.) (approximately 24 h after ovulation) but the next three cleavage stages may be completed within 24 h (between 48 h and 72 h p.c.). Thus, cell-doubling time appears to be around 8 h for 2-8-cell stages. Cleavage in vitro can occur with, or without, the shell membrane. Cleavage in early embryos of the tammar in vitro is slower than that occurring in vivo, and in vitro there may be a '4-cell block' in early development, as in dasyurids. The pattern of cleavage differs markedly from that of dasyurid marsupials in that there is no extrusion of yolk material from the cells and no separation of the blastomeres during the first cleavage stages to the 8-cell stage. The blastomeres are characterized by numerous vesicular structures and lipid droplets, but no yolk bodies. Polarity is not marked in early cleavage, but by the 8-cell stage polarity has developed with surface microvilli and numerous granular vesicles and mitochondria in the cortical regions at one pole of the cells, but sparse microvilli on the inner surfaces and at the other pole. There are complex intervillous interdigitations of microvilli between cells. However, clear identification of cells as pluriblast or trophoblast cells is not possible up to the 8-cell stage examined. These results demonstrate that this macropodid marsupial has a distinctive pattern of early development which differs from that of Didelphis and of the dasyurid marsupials so far described.
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Woolley, P. A. "Pseudantechinus mimulus: a little known dasyurid marsupial." Australian Mammalogy 33, no. 1 (2011): 57. http://dx.doi.org/10.1071/am10043.
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Information has been gathered from a small number of specimens currently recognised as Pseudantechinus mimulus, 18 of which are registered in museum collections. The distribution of these specimens has been mapped and a more defined area than Alexandria Station proposed as the locality of collection of the holotype. Dental characteristics of P. mimulus, by which it was distinguished from P. macdonnellensis, have been examined and found to be more variable than previously thought. A difference between the two species was found in the morphology of the upper fourth molar. P. mimulus appears to be a seasonal breeder. Birth of the young probably occurs in August and September. The penis of P. mimulus is superficially similar to that of P. macdonnellensis. Both species have an appendage on the penis, but in P. mimulus the appendage may be shorter than that of its congener.
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Woolley, P. A., and C. H. Tyndale-Biscoe. "Side-tracked: unique evidence for passage of foetuses through the lateral vaginal canals in a dasyurid marsupial, Sminthopsis douglasi." Australian Mammalogy 39, no. 1 (2017): 115. http://dx.doi.org/10.1071/am16025.
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Frigo, L., and PA Woolley. "Development of the Skeleton of the Stripe-Faced Dunnart, Sminthopsis Macroura (Marsupialia: Dasyuridae)." Australian Journal of Zoology 44, no. 2 (1996): 155. http://dx.doi.org/10.1071/zo9960155.
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Development of the skeleton of the stripe-faced dunnart, Sminthopsis macroura (Gould), a small carnivorous marsupial, was examined in captive-bred pouch young of known age. Skeletal tissue was differentially stained with the dyes alcian blue and alizarin red to demonstrate the presence of cartilage and bone, respectively. The skeleton of the neonate is cartilaginous and ossification centres are first apparent in the skull by Day 5 post partum. The skeleton of S. macroura is well invested with bone by Day 40 of the lactation period, when the young can relinquish the nipple. The sequence of ossification is similar to that reported for other marsupials. Comparisons are made with the eutherian pattern of ossification. This study is the first published work on the ossification of a dasyurid marsupial as shown by whole-mount staining.
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Bennett, JH, WG Breed, DL Hayman, and RM Hope. "Reproductive and Genetic-Studies With a Laboratory Colony of the Dasyurid Marsupial Sminthopsis-Crassicaudata." Australian Journal of Zoology 37, no. 3 (1989): 207. http://dx.doi.org/10.1071/zo9890207.
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The fat-tailed dunnart, Sminthopsis crassicaudata, is a small insectivorous dasyurid (adult weight about 16 g) widely distributed in Australia. A laboratory colony of this marsupial, which has been built up over many years, is providing material for studies of dasyurid reproductive biology and genetics. In the area of reproductive biology, we have found a marked disparity in the age of maturation between the two sexes, and we are currently studying certain aspects of spermatogenesis, sperm transport, fertilisation and early embryonic development. Genetical studies have revealed large differences between the sexes in autosomal linkage values and meiotic chromosome behaviour. In females, we have observed very limited intrachromosomal recombination and this is reflected in the distal localisation of chiasmata on the autosomes. Extreme localisation of chiasmata has not hitherto been found in a mammal, and it will be interesting to see how widely it occurs in other marsupial species. The genetical and cytological findings lead to a number of predictions that are being tested in further experimental work with the colony. Although we have been able to raise litter production to a high level, the very variable and unpredictable nature of male reproductive performance currently limits the wider use of the S. crassicaudata colony. It is clear, however, that this dasyurid has the potential to become a very useful laboratory marsupial and that it will be especially valuable for comparative biomedical studies.
Dissertations / Theses on the topic "Dasyurid marsupial"
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Roberts, Claire. "Implantation and placentation in the dasyurid marsupial, Sminthopsis crassicaudata /." Title page, contents and abstract only, 1995. http://web4.library.adelaide.edu.au/theses/09PH/09phr6433.pdf.
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Mason, Eugene D. "Ecology and conservation of a new carnivorous marsupial species: The silver-headed Antechinus (Antechinus argentus)." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/118725/1/Eugene_Mason_Thesis.pdf.
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Since 2012, five new species of carnivorous marsupial Antechinus have been described. One of these, the threatened silver-headed antechinus (Antechinus argentus), has a highly restricted distribution and occurs in low abundance. When the present study commenced, almost nothing was known of the ecology of the species. Therefore, the aim of this research was to provide foundational knowledge by investigating three main components of the species' ecology: 1. diet, 2. life-history, and 3. habitat use. The aims were achieved and the research resulted in a threatened species listing. The present thesis provides necessary recommendations for ongoing conservation management of the species.
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Mutton, Thomas Y. "Evolutionary biology of the Australian carnivorous marsupial genus Antechinus." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/104321/6/Thomas_Mutton_Thesis.pdf.
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Antechinus is an Australian genus of small carnivorous marsupials. Since 2012, the number of described species in the genus has increased by 50% from ten to fifteen. The systematic relationships of these new species and others in the genus have not been well resolved and a broad phylogeographic study of the genus is lacking. Moreover, little ecological information is known about these new species. Therefore, the present thesis examined the evolutionary biology of Antechinus in two complimentary components. The first component aimed to resolve the systematics and phylogeography of the genus Antechinus. The second component, at a finer spatiotemporal scale, aimed to improve understanding of the autecology, habitat use and risk of extinction within the group, with a focus on the recently named buff-footed antechinus, A. mysticus and a partially sympatric congener, A. subtropicus.
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Hintz, Ashley. "PHYLOGENY OF PLANIGALE (MARSUPILIA: DASYURIDAE), A MULTIGENE APPROACH." OpenSIUC, 2016. https://opensiuc.lib.siu.edu/theses/1924.
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Relationships within Planigalini have not been fully resolved in previous studies that employed only a few (1-3) genes. I employ a mutligene approach that has shown to be robust for other dasyurid tribes. An analysis was undertaken to assess relationships among the currently recognized Planigale species and two potentially new species from the Pilbara and Mount Tom Price regions of Western Australia. This study uses seven genes for phylogenetic estimation. An expanded dataset of mitochondrial 16S DNA sequences from across Australia was also analyzed to assess phylogeographic patterns in Planigale species. Internal nodes from concatenated and species tree analyses are not well supported. This group may be subject to ILS or past introgression; however more data are needed to differentiate between these phenomena. Results from individual genes do not agree on a single topology of relationships. The results from nuclear genes include strong support for internal nodes from protamine P1, but not beta fibrinogen intron 7 and inter-photoreceptor retinoid-binding protein. The mitochondrial gene analyses show few nodes as well supported, but agree that P. maculata and P. novaeguineae are sisters. The expanded 16S dataset agrees with previous work in that there are regional groupings of P. maculata haplotypes. Current ranges for planigale species are poorly documented and the entire genus warrants further investigation to determine whether there are more species than current taxonomy recognizes.
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Andrew, Deborah. "Ecology of the tiger quoll dasyurus maculatus maculatus in coastal New South Wales." Access electronically, 2005. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20070501.155009/index.html.
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Firestone, Karen Beth School of Biological Science UNSW. "The Application of Molecular Genetics to the Conservation Management of Quolls, Dasyurus Species (Dasyuridae:Marsupialia)." Awarded by:University of New South Wales. School of Biological Science, 1999. http://handle.unsw.edu.au/1959.4/17491.
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The quolls are among the largest of the remaining carnivorous marsupials in the Australasian region, and thus occupy an important ecological niche as top predators and scavengers. All quolls are currently in decline and threatened to some degree yet the application of molecular information to the conservation and management of quolls has been unexplored until now. In this thesis I use two independent and highly variable genetic marker systems, the mitochondrial DNA (mtDNA) control region and nuclear microsatellites, to explore various aspects of conservation genetics relevant to the management of quolls. These aspects include an examination of the phylogenetic or evolutionary relationships among all six species of quolls, an examination of the genetic diversity within populations and the degree of differentiation between populations of the four Australian species of quolls, and the definition of units for conservation within these species. The development of suitable nuclear markers was a vital first step in defining levels of genetic variability and differentiation within and between the different populations and species. These markers proved to be highly variable and provided a wealth of information of relevance to the conservation of these species, and will be extremely useful in further studies. The use of the mtDNA control region for phylogenetic analyses was a novel approach to examining this question in quolls and also proved to be highly informative. Results from these phylogenetic analyses highlight the necessity of 1) examining more than one exemplar of each species, as well as 2) finally bringing some consensus to the question of the evolutionary relationships among quolls. Results show that northern quolls form the earliest split from all other quolls and that western quolls are closely related to the two New Guinean species. Furthermore, there is evidence for distinct lineages within species, corresponding to geographically separate or isolated populations. Levels of genetic variability within populations were examined using the microsatellites developed previously. Genetic variation was significantly higher in western quolls than in any other species. This was surprising given the long term and widespread decline of this species. There were also significant differences between populations within species in the level of genetic variability. Low levels of variability were usually found in small or captive bred populations or populations in severe decline. Genetic differentiation between populations was also explored using microsatellites. Significant differentiation in allele frequency distributions was found between most pairwise population comparisons, indicating that each of these populations forms a separate management unit (MU) for conservation purposes. One notable exception was found among populations of tiger quolls from a highly localized area in the Barrington Tops region of New South Wales. Using microsatellites, these populations were not significantly subdivided and thus appeared to be one MU. Using mtDNA, however, these populations were significantly subdivided and thus should be considered separate MUs. Differences in the way these two genetic markers are inherited (mtDNA is maternally inherited, microsatellites are biparentally inherited) provides a clue as to the social structure and organization of these cryptic nocturnal species. Consequently, the use of different genetic marker systems shows that there is sex-biased migration within this species. Finally, the degree of genetic differentiation observed within tiger quolls does not conform to the currently recognized subspecific categories within this species. The major genetic split occurs between the Tasmanian and mainland populations of tiger quolls, not between Dasyurus maculatus maculatus and D. m. gracilis. Thus, the Tasmanian and mainland populations form two distinct evolutionarily significant units (ESUs) for conservation purposes, and I propose that the Tasmanian populations should be elevated to the subspecific status to account for this.
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Torunsky, Roberta. "Phylogeny and phylogeography of the endemic New Guinean Murexia (Marsupialia, Dasyuridae) /." Available to subscribers only, 2007. http://proquest.umi.com/pqdweb?did=1328050151&sid=11&Fmt=2&clientId=1509&RQT=309&VName=PQD.
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Crowther, Mathew S. "Variation and speciation within the Antechinus stuartii-A. flavipes complex (Marsupialia: Dasyuridae) in eastern Australia." Connect to full text, 2001. http://ses.library.usyd.edu.au/handle/2123/1018.
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Thesis (Ph. D.)--University of Sydney, 2001.Title from title screen (viewed January 19, 2009) Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Biological Sciences, Faculty of Science. Includes bibliographical references. Also available in print form.
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Armistead, Rodney. "The impact of Phytophthora cinnamomi on the yellow-footed antechinus (mardo) (Antechinus flavipes leucogaster) (Marsupialia: Dasyuridae) /." Murdoch University Digital Theses Program, 2008. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20100330.90319.
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Pearce, Coral. "Diet, breeding and growth in a new carnivorous marsupial, the Buff-footed Antechinus, Antechinus mysticus, at the northern and southern limits of its range." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/95944/15/Coral%20Pearce%20Thesis.pdf.
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This thesis examined the diet and ecology of a new species of suicidal mammal. The mammal’s diet included a wide range of insects and spiders, supplemented by vertebrates such as small lizards. Breeding strategy was the same as for other members of the genus: all males die annually, apparently due to immune system malfunction after a brief period of frenetic mating.
Books on the topic "Dasyurid marsupial"
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Cole, Jeff R. A field guide to the rodents and dasyurids of the northern territory. Chipping Norton, N.S.W: Surrey Beatty & Sons, 2002.
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Jones, Menna, Chris Dickman, and Mike Archer. Predators with Pouches. CSIRO Publishing, 2003. http://dx.doi.org/10.1071/9780643069862.
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Predators with Pouches provides a unique synthesis of current knowledge of the world’s carnivorous marsupials—from Patagonia to New Guinea and North America to Tasmania. Written by 63 experts in each field, the book covers a comprehensive range of disciplines including evolution and systematics, reproductive biology, physiology, ecology, behaviour and conservation.
Predators with Pouches reveals the relationships between the American didelphids and the Australian dasyurids, and explores the role of the marsupial fauna in the mammal community. It introduces the geologically oldest marsupials, from the Americas, and examines the fall from former diversity of the larger marsupial carnivores and their convergent evolution with placental forms.
The book covers all aspects of carnivorous marsupials, including interesting features of life history, their unique reproduction, the physiological basis for early senescence in semelparous dasyurids, sex ratio variation and juvenile dispersal. It looks at gradients in nutrition—from omnivory to insectivory to carnivory—as well as distributional ecology, social structure and conservation dilemmas.