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Thematische Bibliographien / Dunnarts / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Dunnarts“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 2. Februar 2022

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1

Bleicher, Sonny S., and Christopher R. Dickman. "On the landscape of fear: shelters affect foraging by dunnarts (Marsupialia, Sminthopsis spp.) in a sandridge desert environment." Journal of Mammalogy 101, no. 1 (February 15, 2020): 281–90. http://dx.doi.org/10.1093/jmammal/gyz195.

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Abstract Disturbances such as fire reduce the structural complexity of terrestrial habitats, increasing the risk of predation for small prey species. The postfire effect of predation has especially deleterious effects in Australian habitats owing to the presence of invasive mammalian predators, the red fox (Vulpes vulpes) and feral cat (Felis catus), that rapidly exploit burned habitats. Here, we investigated whether the provision of artificial shelter could alleviate the risk of predation perceived by two species of small marsupial, the dunnarts Sminthopsis hirtipes and S. youngsoni, in open

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Read, John L., Matthew J. Ward, and Katherine E. Moseby. "Factors that influence trap success of sandhill dunnarts (Sminthopsis psammophila) and other small mammals in Triodia dunefields of South Australia." Australian Mammalogy 37, no. 2 (2015): 212. http://dx.doi.org/10.1071/am14020.

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Optimised detection and sensitivity of fauna-monitoring programs is essential for the adaptive management of threatened species. We describe the influence of trap type, trapping duration and timing on the detection rates of small vertebrates, in particular the nationally endangered sandhill dunnart (Sminthopsis psammophila) in its two primary populations in South Australia. A total of 118 and 155 sandhill dunnarts were captured from the Middleback and Yellabinna regions, respectively, from five trapping sessions between 2008 and 2012. Wide deep pitfall traps (225 mm diameter × 600–700 mm deep)

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Haythornthwaite, Adele S. "Microhabitat use and foraging behaviour of Sminthopsis youngsoni (Marsupialia:Dasyuridae) in arid central Australia." Wildlife Research 32, no. 7 (2005): 609. http://dx.doi.org/10.1071/wr04126.

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In this study, fluorescent pigment tracking was used to determine the microhabitat use and foraging behaviour of a small insectivorous marsupial, Sminthopsis youngsoni (the lesser hairy-footed dunnart), in the dunefields of the Simpson Desert, south-western Queensland. In total, 25 successful trails were traced over the duration of this study, between March 1996 and April 1998. Nocturnal foraging trails were identified, then the distance travelled by the dunnart through each microhabitat type (nine in all) was measured and accumulated for each trail and compared with surrounding available micr

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Langman, C., S. Orgeig, and C. B. Daniels. "Alterations in composition and function of surfactant associated with torpor in Sminthopsis crassicaudata." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 271, no. 2 (August 1, 1996): R437—R445. http://dx.doi.org/10.1152/ajpregu.1996.271.2.r437.

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Cold profoundly influences lung compliance in homeothermic mammals. Much of this effect has traditionally been attributed to the inactivation of the surfactant system. However, many mammals undergo large fluctuations in body temperature (heterothermic mammals). Here, the surfactant lipid composition and lung compliance of warm-active dunnarts (Sminthopsis crassicaudata) and the homeothermic mouse (Mus musculus) [body temperature (Tb) = 35-37 degrees C] were compared with those of dunnarts killed after 1,4 or 8 h of torpor (Tb < 20 degrees C). Lung compliance was measured before and after th

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Lopatko, Olga V., Sandra Orgeig, Christopher B. Daniels, and David Palmer. "Alterations in the surface properties of lung surfactant in the torpid marsupial Sminthopsis crassicaudata." Journal of Applied Physiology 84, no. 1 (January 1, 1998): 146–56. http://dx.doi.org/10.1152/jappl.1998.84.1.146.

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Lopatko, Olga V., Sandra Orgeig, Christopher B. Daniels, and David Palmer. Alterations in the surface properties of lung surfactant in the torpid marsupial Sminthopsis crassicaudata. J. Appl. Physiol. 84(1): 146–156, 1998.—Torpor changes the composition of pulmonary surfactant (PS) in the dunnart Sminthopsis crassicaudata [C. Langman, S. Orgeig, and C. B. Daniels. Am. J. Physiol. 271 ( Regulatory Integrative Comp. Physiol. 40): R437–R445, 1996]. Here we investigated the surface activity of PS in vitro. Five micrograms of phospholipid per centimeter squared surface area of whole lavage (from mi

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Lang, Carol J., Anthony D. Postle, Sandra Orgeig, Fred Possmayer, Wolfgang Bernhard, Amiya K. Panda, Klaus D. Jürgens, William K. Milsom, Kaushik Nag, and Christopher B. Daniels. "Dipalmitoylphosphatidylcholine is not the major surfactant phospholipid species in all mammals." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 289, no. 5 (November 2005): R1426—R1439. http://dx.doi.org/10.1152/ajpregu.00496.2004.

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Pulmonary surfactant, a complex mixture of lipids and proteins, lowers the surface tension in terminal air spaces and is crucial for lung function. Within an animal species, surfactant composition can be influenced by development, disease, respiratory rate, and/or body temperature. Here, we analyzed the composition of surfactant in three heterothermic mammals (dunnart, bat, squirrel), displaying different torpor patterns, to determine: 1) whether increases in surfactant cholesterol (Chol) and phospholipid (PL) saturation occur during long-term torpor in squirrels, as in bats and dunnarts; 2) w

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Knight, K. "DUNNARTS' DEVELOPMENT ADAPTS." Journal of Experimental Biology 215, no. 9 (April 11, 2012): iii. http://dx.doi.org/10.1242/jeb.073072.

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8

Yousef, A., and L. Selwood. "Embryonic development in culture of the marsupials Antechinus stuartii (Macleay) and Sminthopsis macroura (Spencer) during preimplantation stages." Reproduction, Fertility and Development 5, no. 4 (1993): 445. http://dx.doi.org/10.1071/rd9930445.

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Forty-nine blastocysts from 11 brown antechinus, Antechinus stuartii, and 96 blastocysts from 17 stripe-faced dunnarts, Sminthopsis macroura, were used to develop a culture system for embryos during preimplantation stages. Blastocysts of brown antechinus were collected on Days 6-9 for unilaminar stages, Days 16-21 for bilaminar stages and Days 20 and 21 for trilaminar stages. Blastocysts of stripe-faced dunnarts were collected on Day 6 for unilaminar stages, Days 6-8 for bilaminar stages and Day 8 for trilaminar stages. Culture media were Dulbecco's modified Eagle's medium (DMEM) with 4.5% glu

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Webb, Jonathan K., David Pearson, and Richard Shine. "A small dasyurid predator (Sminthopsis virginiae) rapidly learns to avoid a toxic invader." Wildlife Research 38, no. 8 (2011): 726. http://dx.doi.org/10.1071/wr10206.

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Context Invasive species are a leading cause of extinctions, yet predicting their ecological impacts poses a formidable challenge for conservation biologists. When native predators are naïve to invaders, they may lack appropriate behaviours to deal with the invader. In northern Australia, the invasion of the highly toxic cane toad (Rhinella marina) has caused serious population declines of reptilian and mammalian predators that are ill equipped to deal with toad toxins. Cane toads recently invaded the Kimberley region of Western Australia, where they potentially threaten several species of sma

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Woolley, P. A. "Diurnal resting sites of the nocturnal dasyurid marsupial Sminthopsis douglasi in Bladensburg National Park, Queensland." Australian Mammalogy 39, no. 1 (2017): 121. http://dx.doi.org/10.1071/am16013.

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An attempt has been made to determine where Julia Creek dunnarts (Sminthopsis douglasi), small nocturnal dasyurid marsupials, rest during the day under differing seasonal conditions. A short-term study was carried out in Bladensburg National Park, near the southern edge of its known distribution on the Mitchell grass downs in Queensland. Radio-collared individuals were located in cracks and holes. None of the males and females (including one with young in the pouch) were found to use the same resting site over periods of up to nine days, suggesting that they may be nomadic. Climatic factors ma

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Paolino, Annalisa, Laura R. Fenlon, Peter Kozulin, Elizabeth Haines, Jonathan W. C. Lim, Linda J. Richards, and Rodrigo Suárez. "Differential timing of a conserved transcriptional network underlies divergent cortical projection routes across mammalian brain evolution." Proceedings of the National Academy of Sciences 117, no. 19 (April 20, 2020): 10554–64. http://dx.doi.org/10.1073/pnas.1922422117.

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A unique combination of transcription factor expression and projection neuron identity demarcates each layer of the cerebral cortex. During mouse and human cortical development, the transcription factor CTIP2 specifies neurons that project subcerebrally, while SATB2 specifies neuronal projections via the corpus callosum, a large axon tract connecting the two neocortical hemispheres that emerged exclusively in eutherian mammals. Marsupials comprise the sister taxon of eutherians but do not have a corpus callosum; their intercortical commissural neurons instead project via the anterior commissur

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Cole, J. R., and D. F. Gibson. "Distribution of Stripe-faced Dunnarts Sminthopsis macroura and Desert Dunnarts S. youngsoni (Marsupialia: Dasyuridae) in the Northern Territory." Australian Mammalogy 14, no. 2 (1991): 129. http://dx.doi.org/10.1071/am91014.

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Bleicher, Sonny S., and Christopher R. Dickman. "Bust economics: foragers choose high quality habitats in lean times." PeerJ 4 (January 21, 2016): e1609. http://dx.doi.org/10.7717/peerj.1609.

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In environments where food resources are spatially variable and temporarily impoverished, consumers that encounter habitat patches with different food density should focus their foraging initially where food density is highest before they move to patches where food density is lower. Increasing missed opportunity costs should drive individuals progressively to patches with lower food density as resources in the initially high food density patches deplete. To test these expectations, we assessed the foraging decisions of two species of dasyurid marsupials (dunnarts:Sminthopsis hirtipesandS. youn

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Wood, Philip G., Olga V. Lopatko, Sandra Orgeig, Jean M. P. Joss, Allan W. Smits, and Christopher B. Daniels. "Control of pulmonary surfactant secretion: an evolutionary perspective." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 278, no. 3 (March 1, 2000): R611—R619. http://dx.doi.org/10.1152/ajpregu.2000.278.3.r611.

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Pulmonary surfactant, a mixture consisting of phospholipids (PL) and proteins, is secreted by type II cells in the lungs of all air-breathing vertebrates. Virtually nothing is known about the factors that control the secretion of pulmonary surfactant in nonmammalian vertebrates. With the use of type II cell cultures from Australian lungfish, North American bullfrogs, and fat-tailed dunnarts, we describe the autonomic regulation of surfactant secretion among the vertebrates. ACh, but not epinephrine (Epi), stimulated total PL and disaturated PL (DSP) secretion from type II cells isolated from A

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Leslie, Alexandra M., Mathew Stewart, Elizabeth Price, and Adam J. Munn. "Daily changes in food availability, but not long-term unpredictability, determine daily torpor-bout occurrences and frequency in stripe-faced dunnarts (Sminthopsis macroura)." Australian Journal of Zoology 63, no. 1 (2015): 12. http://dx.doi.org/10.1071/zo14058.

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Daily torpor, a short-term reduction in body temperature and metabolism, is an energy-saving strategy that has been interpreted as an adaptation to unpredictable resource availability. However, the effect of food-supply variability on torpor, separately from consistent food restriction, remains largely unexamined. In this study, we investigated the effect of unpredictable food availability on torpor in stripe-faced dunnarts (Sminthopsis macroura). After a control period of ad libitum feeding, dunnarts were offered 65% of their average daily ad libitum intake over 31 days, either as a constant

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Bishop, N., M. Bulbert, S. Carr, S. Kroker, and J. Millikan. "Sonographic Analysis of Vocalisations in Captive Dunnarts, Sminthopsis crassicaudata." Australian Mammalogy 18, no. 1 (1995): 99. http://dx.doi.org/10.1071/am95099.

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17

Bennison, Kerrie, Christopher R. Dickman, and Robert Godfree. "Habitat use and ecological observations of the Ooldea dunnart (Sminthopsis ooldea) at Uluru–Kata Tjuta National Park, Northern Territory." Australian Mammalogy 35, no. 2 (2013): 175. http://dx.doi.org/10.1071/am12048.

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The Ooldea dunnart (Sminthopsis ooldea) is a small (10–11 g) and poorly known dasyurid marsupial that is endemic to the central and western arid regions of Australia. Surveys carried out at Uluru–Kata Tjuta National Park, Northern Territory, from 1994 to 2010 yielded 37 captures of this elusive species, providing novel insights into its biology. Most captures were made in pitfall traps, with spring breeding confirmed by the presence of pregnant or lactating females during October and November. Animals were captured in mallee and mulga woodland and spinifex (Triodia spp.) dominated dune fields

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Woolley, P. A. "The Julia Creek dunnart, Sminthopsis douglasi (Marsupialia : Dasyuridae): breeding of a threatened species in captivity and in wild populations." Australian Journal of Zoology 63, no. 6 (2015): 411. http://dx.doi.org/10.1071/zo15056.

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A detailed description of the methods used to house, maintain and assess the reproductive condition of captive Julia Creek dunnarts, Sminthopsis douglasi, that led to successful breeding of the species in captivity is provided. Basic features of the reproductive biology of this species of Sminthopsis have been established from observations made on captive animals. The females are polyoestrous, with a cycle length of ~28 days. Young are born 13–16 days after mating and are dependent on the mother for ~70 days. The age at which captive animals commence breeding ranged from 13 to 38 weeks (female

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Krajewski, Carey, Frank E. Anderson, Patricia A. Woolley, and Michael Westerman. "Molecular Evidence for a Deep Clade of Dunnarts (Marsupialia: Dasyuridae: Sminthopsis)." Journal of Mammalian Evolution 19, no. 4 (June 13, 2012): 265–76. http://dx.doi.org/10.1007/s10914-012-9204-3.

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Hume, I. D., C. Smith, and P. A. Woolley. "Anatomy and physiology of the gastrointestinal tract of the Julia Creek dunnart, Sminthopsis douglasi (Marsupialia : Dasyuridae)." Australian Journal of Zoology 48, no. 5 (2000): 475. http://dx.doi.org/10.1071/zo00016.

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The gastrointestinal tract of the endangered Julia Creek dunnart (Sminthopsis douglasi), the largest member of the genus Sminthopsis, consists of a simple, unilocular stomach and an intestine of relatively uniform calibre throughout. There is no hindgut caecum, in common with other Australian carnivorous marsupials. Brunner’s glands form a collar at the proximal end of the duodenum; they consist of simple uncoiled tubes at Day 45 of pouch life but are well differentiated at Day 60, before the young take their first solid food at Day 65–70. Rate of passage of digesta was measured in nine adult

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Woolley, P. A., and S. L. Gilfillan. "Confirmation of polyoestry in captive White-footed Dunnarts, Sminthopsis leucopus (Marsupialia: Dasyuridae)." Australian Mammalogy 14, no. 2 (1991): 137. http://dx.doi.org/10.1071/am91016.

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Suárez, Rodrigo, Annalisa Paolino, Laura R. Fenlon, Laura R. Morcom, Peter Kozulin, Nyoman D. Kurniawan, and Linda J. Richards. "A pan-mammalian map of interhemispheric brain connections predates the evolution of the corpus callosum." Proceedings of the National Academy of Sciences 115, no. 38 (September 4, 2018): 9622–27. http://dx.doi.org/10.1073/pnas.1808262115.

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The brain of mammals differs from that of all other vertebrates, in having a six-layered neocortex that is extensively interconnected within and between hemispheres. Interhemispheric connections are conveyed through the anterior commissure in egg-laying monotremes and marsupials, whereas eutherians evolved a separate commissural tract, the corpus callosum. Although the pattern of interhemispheric connectivity via the corpus callosum is broadly shared across eutherian species, it is not known whether this pattern arose as a consequence of callosal evolution or instead corresponds to a more anci

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Tomlinson, Sean, Philip C. Withers, and Shane K. Maloney. "Comparative thermoregulatory physiology of two dunnarts, Sminthopsis macroura and Sminthopsis ooldea (Marsupialia : Dasyuridae)." Australian Journal of Zoology 60, no. 1 (2012): 54. http://dx.doi.org/10.1071/zo12034.

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Metabolic rate and evaporative water loss (EWL) were measured to quantify the thermoregulatory patterns of two dasyurids, the stripe-faced dunnart (Sminthopsis macroura) and the Ooldea dunnart (S. ooldea) during acute exposure to Ta between 10 and 35°C. S. macroura maintained consistent Tb across the Ta range, whereas S. ooldea was more thermolabile. The metabolic rate of both species decreased from Ta = 10°C to BMR at Ta = 30°C. Mass-adjusted BMR at Ta = 30°C was the same for the two species, but there was no common regression of metabolic rate below the thermoneutral zone (TNZ). There was no

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Bonney, Kathryn R., and C. D. L. Wynne. "Visual discrimination learning and strategy behavior in the fat-tailed dunnarts ( Sminthopsis crassicaudata )." Journal of Comparative Psychology 116, no. 1 (2002): 55–62. http://dx.doi.org/10.1037/0735-7036.116.1.55.

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Tomlinson, S., P. C. Withers, and S. K. Maloney. "Flexibility in thermoregulatory physiology of two dunnarts, Sminthopsis macroura and Sminthopsis ooldea (Marsupialia; Dasyuridae)." Journal of Experimental Biology 215, no. 13 (June 6, 2012): 2236–46. http://dx.doi.org/10.1242/jeb.065516.

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Start, A. N., D. Moro, M. Adams, and R. Bencini. "Dunnarts from Boullanger Island: new evidence and reassessment of a taxonomic issue with resource implications." Australian Mammalogy 28, no. 1 (2006): 51. http://dx.doi.org/10.1071/am06006.

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Crowther et al. (1999) described an island population of an Australian dasyurid marsupial, Sminthopsis griseoventer, as a new subspecies on molecular (allozyme) and morphological grounds despite a previously published, contradictory genetic study and evidence of sympatry with its mainland conspecific. The legitimacy of this taxonomic arrangement has implications for the allocation of scarce management resources because the new taxon could be considered 'Critically Endangered'. Samples of the original tissues from which the molecular data cited by Crowther et al. were obtained no longer exist.

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Paull, David C. "Refuge sites, activity and torpor in wild common dunnarts (Sminthopsis murina) in a temperate heathland." Australian Mammalogy 35, no. 2 (2013): 153. http://dx.doi.org/10.1071/am12016.

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This telemetric study describes patterns of movement, activity, refuge-site use and torpor in free-living Sminthopsis murina over one autumn/winter period in a warm-temperate habitat. S. murina were found to rest during the day in burrows and hollow logs. Individuals maintained several daytime refuges and foraged over several hectares each night. They were found to prefer agamid burrows where a daily temperature of 10.3–15.8°C was maintained when ambient surface temperatures varied between 3.5 and 24.6°C. Torpor was employed in 12 of 13 complete resting periods recorded. Dunnarts were found to

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Nagy, KA, AK Lee, RW Martin, and MR Fleming. "Field Metabolic-Rate and Food Requirement of a Small Dasyurid Marsupial, Sminthopsis-Crassicaudata." Australian Journal of Zoology 36, no. 3 (1988): 293. http://dx.doi.org/10.1071/zo9880293.

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Field metabolic rates (FMRs) and rates of water flux in free-ranging fat-tailed dunnarts, Sminthopsis crassicaudata, were measured during spring (late October) using doubly labelled water. Feeding rates were estimated on the basis of water and energy fluxes. FMRs averaged 68.7 kJ d-' in adults (mean body mass= 16.6 g), and were 29.2 kJ d-' in juveniles (6.1 g). These FMRs are 6.6 times basal metabolic rate (BMR), and are much higher than the hypothetical maxima of four to five times BMR. Other dasyurid marsupials also have high FMR/BMR ratios, but so does a small petaurid marsupial. S. crassic

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Buttemer, William A., Paul G. Story, Karen J. Fildes, Russell V. Baudinette, and Lee B. Astheimer. "Fenitrothion, an organophosphate, affects running endurance but not aerobic capacity in fat-tailed dunnarts (Sminthopsis crassicaudata)." Chemosphere 72, no. 9 (July 2008): 1315–20. http://dx.doi.org/10.1016/j.chemosphere.2008.04.054.

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STRACHAN, JESSICA, LING-YU E. CHANG, MATTHEW J. WAKEFIELD, JENNIFER A. MARSHALL GRAVES, and SAMIR S. DEEB. "Cone visual pigments of the Australian marsupials, the stripe-faced and fat-tailed dunnarts: Sequence and inferred spectral properties." Visual Neuroscience 21, no. 3 (May 2004): 223–29. http://dx.doi.org/10.1017/s0952523804213281.

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Studies of color vision in marsupial mammals have been very limited. Two photoreceptor genes have been characterized from the tammar wallaby, but a third cone pigment was suggested by microspectrophotometric measurements on cone photoreceptors in two other species, including the fat-tailed dunnart, Sminthopsis crassicaudata. To determine the sequence and infer absorption maxima of the cone photoreceptor pigments of S. crassicaudata and the related stripe-faced dunnart (Sminthopsis macroura), we have used evolutionarily conserved sequences of the cone pigments of other species, including the ta

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Frank, A., and T. Soderquist. "The importance of refuge habitat in the local conservation of stripe-faced dunnarts Sminthopsis macroura on arid rangelands." Australian Mammalogy 27, no. 1 (2005): 75. http://dx.doi.org/10.1071/am05075.

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ANTHROPOGENIC change to Australian habitats accelerated rapidly during the late 1800s as sheep grazing spread across the continent. In particular, intensive grazing in arid and semi-arid regions is believed to have vastly altered vegetation communities, triggered extensive soil erosion, and reduced shelter available to small mammals, thus increasing their vulnerability to predation (Morton 1990). It is not surprising, then, that since European settlement 32 species (42%) of mammals inhabiting the arid zone of Australia have become extinct (Landsberg et al. 1997), and many others have suffered

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Every, Alison L., Lynne Selwood, Natalia Castano-Rodriguez, Wei Lu, Helen M. Windsor, Janet LK Wee, Agnieszka Swierczak, et al. "Did transmission of Helicobacter pylori from humans cause a disease outbreak in a colony of Stripe-faced Dunnarts (Sminthopsis macroura)?" Veterinary Research 42, no. 1 (2011): 26. http://dx.doi.org/10.1186/1297-9716-42-26.

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Bennison, Clifford, J. Anthony Friend, Timothy Button, Harriet Mills, Cathy Lambert, and Roberta Bencini. "Potential impacts of poison baiting for introduced house mice on native animals on islands in Jurien Bay, Western Australia." Wildlife Research 43, no. 1 (2016): 61. http://dx.doi.org/10.1071/wr15126.

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Context House mice (Mus domesticus) are present on Boullanger and Whitlock islands, Western Australia, and could potentially threaten populations of the dibbler (Parantechinus apicalis) and grey-bellied dunnart (Sminthopsis griseoventer) through competition for resources. A workshop in 2007 recommended a study to assess the feasibility of eradicating house mice from the islands by using poison baits and of the risk posed to non-target native species. Aim We aimed to assess the risk to non-target native species if poison baiting was used to eradicate house mice on Boullanger and Whitlock island

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Yeo, Jia Hao, Bronwyn M. McAllan, and Stuart T. Fraser. "Scanning Electron Microscopy Reveals Two Distinct Classes of Erythroblastic Island Isolated from Adult Mammalian Bone Marrow." Microscopy and Microanalysis 22, no. 2 (February 22, 2016): 368–78. http://dx.doi.org/10.1017/s1431927616000155.

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AbstractErythroblastic islands are multicellular clusters in which a central macrophage supports the development and maturation of red blood cell (erythroid) progenitors. These clusters play crucial roles in the pathogenesis observed in animal models of hematological disorders. The precise structure and function of erythroblastic islands is poorly understood. Here, we have combined scanning electron microscopy and immuno-gold labeling of surface proteins to develop a better understanding of the ultrastructure of these multicellular clusters. The erythroid-specific surface antigen Ter-119 and t

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Elsworth, P., D. Berman, and M. Brennan. "Changes in small native animal populations following control of European rabbits (Oryctolagus cuniculus) by warren ripping in the Australian arid zone." Wildlife Research 46, no. 4 (2019): 343. http://dx.doi.org/10.1071/wr18088.

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Context European rabbits have a great impact on native vegetation and small vertebrates in Australia. Rabbits consume vegetation and promote invasive plants and invasive predators, and compete directly and indirectly with native animals suppressing those populations. Aims We explored the changes in small native vertebrates and invertebrates following the removal of rabbits. Methods Warren ripping was undertaken on a property in south-western Queensland at four sites and the results of pitfall trapping were compared with four nearby paired control sites. Invertebrates and small mammals were cou

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Monamy, Vaughan, and Barry J. Fox. "Differential habitat use by a local population of subadult common dunnarts, Sminthopsis murina, following wildfire in coastal wet heath, New South Wales, Australia." Wildlife Research 32, no. 7 (2005): 617. http://dx.doi.org/10.1071/wr04105.

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Little has been published about Sminthopsis murina, a small insectivorous marsupial encountered infrequently during trapping studies. Individuals favour vegetation associations found in recently burnt heathlands and forests; however, individuals rarely remain in such areas long enough for repeated capture. We report an unusual occurrence of habitat fidelity by a dense population of subadult S. murina in coastal wet heath, New South Wales, Australia. Individuals were captured repeatedly in the first 16 months following wildfire (30 subadults trapped 154 times: recapture rate = 80%). Densities p

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Czarny, N. A., J. I. Garnham, M. S. Harris, and J. C. Rodger. "Comparison of the production, quality, and in vitro maturation capacity of oocytes from untreated cycling and intermediate phase equine serum gonadotropin-treated fat-tailed dunnarts (Sminthopsis crassicaudata)." REPRODUCTION 138, no. 1 (July 2009): 23–31. http://dx.doi.org/10.1530/rep-09-0064.

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This study describes ovarian changes during the natural and stimulated reproductive cycle of breeding (≤12 month) and retired (>12 month) fat-tailed dunnarts, Sminthopsis crassicaudata. Increased urinary cornified epithelial cells and the influx of leukocytes defined day 0, at which time the naturally cycling females had already ovulated; at day 16 females had no antral follicles, but by day 20 antral follicles had begun to develop. There was no difference between naturally cycling breeding and retired females. Females were stimulated with 1 IU equine serum gonadotropin (eSG) during the int

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Haynes, JI, and GW Skidmore. "Hematology of the Dasyurid Marsupials Sminthopsis-Crassicaudata and Sminthopsis-Macroura." Australian Journal of Zoology 39, no. 2 (1991): 157. http://dx.doi.org/10.1071/zo9910157.

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Various haematological parameters and morphological aspects were determined for blood collected from 52 fat-tailed dunnarts, Sminthopsis crassicaudata. Compared with those of other marsupials, the erythrocyte and leukocyte counts, haemoglobin concentration and packed cell volume were low, whereas the percentage of reticulocytes (8%) was high. Differential counts revealed a sexual dimorphism for the percentage of neutrophils and lymphocytes present. Blood cell counts, including reticulocyte and differential counts, were also performed on blood from 11 animals of a closely related species, Smint

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Story, Paul, Michael J. Hooper, Lee B. Astheimer, and William A. Buttemer. "Acute oral toxicity of the organophosphorus pesticide fenitrothion to fat-tailed and stripe-faced dunnarts and its relevance for pesticide risk assessments in Australia." Environmental Toxicology and Chemistry 30, no. 5 (March 4, 2011): 1163–69. http://dx.doi.org/10.1002/etc.478.

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Yousef, A., and L. Selwood. "The type and differentiation of cells in vitro from unilaminar and bilaminar blastocysts of two marsupials, Antechinus stuartii and Sminthopsis macroura." Reproduction, Fertility and Development 8, no. 4 (1996): 743. http://dx.doi.org/10.1071/rd9960743.

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The type and ability to differentiate in vitro of cells found in blastocysts of two marsupials were examined. Thirteen unilaminar blastocysts on Day 7 to Day 12 of gestation and 24 bilaminar blastocysts on Day 16 and Day 18 of gestation were collected from 11 brown antechinus, Antechinus stuartii. A total of of 77 unilaminar blastocysts on Day 5 and Day 6 of gestation and a total of 61 bilaminar blastocysts on Day 6 and Day 7 of gestation were collected from 40 stripe-faced dunnarts, Sminthopsis macroura. Pluriblast and trophoblast cells, confined to separate hemispheres, were found in unilami

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Garrett, Andrew, Virginia Lannigan, Nathanael J. Yates, Jennifer Rodger, and Wilhelmina Mulders. "Physiological and anatomical investigation of the auditory brainstem in the Fat-tailed dunnart (Sminthopsis crassicaudata)." PeerJ 7 (September 30, 2019): e7773. http://dx.doi.org/10.7717/peerj.7773.

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The fat-tailed dunnart (Sminthopsis crassicaudata) is a small (10–20 g) native marsupial endemic to the south west of Western Australia. Currently little is known about the auditory capabilities of the dunnart, and of marsupials in general. Consequently, this study sought to investigate several electrophysiological and anatomical properties of the dunnart auditory system. Auditory brainstem responses (ABR) were recorded to brief (5 ms) tone pips at a range of frequencies (4–47.5 kHz) and intensities to determine auditory brainstem thresholds. The dunnart ABR displayed multiple distinct peaks a

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Gardner, DK, L. Selwood, and M. Lane. "Nutrient uptake and culture of Sminthopsis macroura (stripe-faced dunnart) embryos." Reproduction, Fertility and Development 8, no. 4 (1996): 685. http://dx.doi.org/10.1071/rd9960685.

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Glucose and pyruvate uptake by individual embryos were measured in a marsupial species (stripe-faced dunnart) and a eutherian species (mouse). At each stage of development, nutrient uptake by the dunnart embryo was around an order of magnitude greater than that of the mouse embryo. The pattern of glucose uptake by the dunnart embryo was not like that for any eutherian embryo, all of which have a low glucose uptake before the blastocyst stage. Rather, in the dunnart embryo there was a significant increase in glucose uptake after the third cleavage division, increasing from 13.6 pmol embryo h-1

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Taggart, DA, CM Leigh, VR Steele, WG Breed, PD Temple-Smith, and J. Phelan. "Effect of cooling and cryopreservation on sperm motility and morphology of several species of marsupial." Reproduction, Fertility and Development 8, no. 4 (1996): 673. http://dx.doi.org/10.1071/rd9960673.

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The effects of long-term cooling and freezing on sperm motility are described for six marsupial species: the fat-tailed dunnart, koala, brushtail possum, long-footed potoroo, northern brown bandicoot and ring-tailed possum. The effects of up to eight days of cooling at 4 degrees C on the motility of dunnart spermatozoa and the effect of cryopreservation on spermatozoa of the other species were determined. The cryoprotectant used was a Tris-citrate-fructose-egg yolk-glycerol diluent. The percentage and rating of sperm motility, and sperm structure, as determined by light microscopy, were invest

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ARRESE, C. A., J. RODGER, L. D. BEAZLEY, and J. SHAND. "Topographies of retinal cone photoreceptors in two Australian marsupials." Visual Neuroscience 20, no. 3 (May 2003): 307–11. http://dx.doi.org/10.1017/s0952523803203096.

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Microspectrophotometry indicates the presence of at least three cone visual pigments in two Australian marsupials, the fat-tailed dunnart (Sminthopsis crassicaudata) and honey possum (Tarsipes rostratus). Here we have examined the distribution of cone types using antisera, JH455 and JH492, that recognize short-wavelength-sensitive (SWS) and medium-to-long-wavelength-sensitive (M/LWS) cone opsins, respectively. SWS cones were concentrated in dorso-temporal retina in the dunnart with a shallow decreasing gradient extending to the periphery (2300–1500/mm2). In the honey possum, SWS cones showed a

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Woinarski, J. C. Z., P. A. Woolley, and S. V. Andyck. "The Distribution of The Dunnart Sminthopsis butleri." Australian Mammalogy 19, no. 1 (1996): 27. http://dx.doi.org/10.1071/am96027.

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Three records of the dunnart Sminthopsis butleri from Bathurst and Melville Islands extend the known range of this species from a single location in the Kimberley, Western Australia, to the Northern Territory. The meagre ecological information on this species is documented.

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Witt, Ryan R., John J. Rodger, and John C. Rodger. "Breeding in the fat-tailed dunnart following ovarian suppression with the gonadotrophin-releasing hormone agonist Lucrin® Depot." Reproduction, Fertility and Development 30, no. 3 (2018): 507. http://dx.doi.org/10.1071/rd16518.

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Lucrin Depot (AbbVie), a 1-month microsphere gonadotrophin-releasing hormone (GnRH) agonist preparation, was investigated as a potential agent to synchronise cycling in the fat-tailed dunnart (Sminthopsis crassicaudata). Forty-eight randomly selected females were treated with 5 or 10 mg kg−1 Lucrin Depot (n = 24 per dose). Eighteen females per treatment had their reproductive activity scored at 4, 8, 12 and 16 weeks using two ovarian (Graafian follicle and corpus luteum status) and two reproductive tract (uterine and vaginal muscularity and vascularity) parameters that formed a reproductive ac

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Woolley, PA. "New records of the Julia Creek dunnart, Sminthopsis douglasi (Marsupialia : Dasyuridae)." Wildlife Research 19, no. 6 (1992): 779. http://dx.doi.org/10.1071/wr9920779.

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The Julia Creek dunnart, Sminthopsis douglasi, previously known from only four specimens, the last of which was collected in 1972, has been found alive. The number of known localities has been increased from three to eleven, and its range in the 'downs country' of north-west Queensland extended.

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Cooper, S. J. B., M. Adams, and A. Labrinidis. "Phylogeography of the Australian dunnart Sminthopsis crassicaudata (Marsupialia : Dasyuridae)." Australian Journal of Zoology 48, no. 5 (2000): 461. http://dx.doi.org/10.1071/zo00014.

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Analyses of mitochondrial DNA (mtDNA) and allozymes are used to investigate the population genetic structure, phylogeography and systematics of the fat-tailed dunnart, Sminthopsis crassicaudata. Phylogenetic analyses of control region sequences reveal the presence of two major mtDNA haplotype clades. A survey of the distribution of the two clades using diagnostic restriction endonucleases shows that one clade is restricted to southeast Australia whereas the second clade occupies the remaining central to western range of S. crassicaudata. Allozyme electrophoresis also shows concordant patterns

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Witt, Ryan Robert, Ian Ross Forbes, John McBain, and John Cameron Rodger. "Ovarian suppression in a marsupial following single treatment with a gonadotrophin-releasing hormone agonist in microspheres." Reproduction, Fertility and Development 28, no. 12 (2016): 1964. http://dx.doi.org/10.1071/rd14423.

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The effect of treatment with Lucrin Depot (1 month), a microsphere gonadotrophin-releasing hormone agonist preparation, was investigated in the fat-tailed dunnart (Sminthopsis crassicaudata) as a potential strategy to synchronise cycling. The status of the ovaries (ovarian size, number and size of Graafian follicles and corpora lutea) and reproductive tract (weight, vascularity and muscularity) in twelve untreated females were assessed to establish the activity parameters for randomly selected cycling animals. Thirty-six females were treated with 1 mg kg–1 (n = 12), 10 mg kg–1 (n = 12) or 20 m

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Geiser, F., Bronwyn M. McAllan, and R. M. Brigham. "Daily torpor in a pregnant dunnart (Sminthopsis macroura Dasyuridae: Marsupialia)." Mammalian Biology 70, no. 2 (March 2005): 117–21. http://dx.doi.org/10.1016/j.mambio.2004.06.003.

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