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1
Davison, A. "A new subspecies of Dusky Antechinus, Antechinus swainsonii (Marsupialia: Dasyuridae) from western Victoria." Australian Mammalogy 14, no. 2 (1991): 103. http://dx.doi.org/10.1071/am91010.
Повний текст джерелаАнотація:
Antechinus swainsonii insulanus subsp. nov. is described from specimens collected in the Grampians National Park in western Victoria. This subspecies, specimens of which were previously referred to as A. swainsonii mimetes, differs most notably from A. s. swainsonii and A. s. mimetes by its widely flared zygomatic arches, by its broader rostrum, by lacking an entoconid on the second lower molar and by having a sharply raised hypocristid on the fourth lower molar. Antechinus s. insulanus further differs significantly from other southern specimens of A. swainsonii in ten out of fifteen cranial and dental measurements used.
2
Davies, Micah J., and Alex Drew. "Monitoring of small mammal populations in the Brindabella Ranges after fire." Australian Mammalogy 36, no. 1 (2014): 103. http://dx.doi.org/10.1071/am13017.
Повний текст джерелаАнотація:
We live-trapped small mammals in the Brindabella Ranges west of Canberra, Australian Capital Territory from April 2009 until October 2011 to assess population recovery after an intense and widespread fire that occurred across the region in 2003. Three native mammals (agile antechinus, Antechinus agilis; dusky antechinus, Antechinus swainsonii; bush rat, Rattus fuscipes) were encountered. Trapping records and spool-and-line movement patterns suggested a strong association of these small mammals with moist gully vegetation that had survived the fire.
3
Parrott, Marissa L., Simon J. Ward, Peter D. Temple-Smith, and Lynne Selwood. "Effects of drought on weight, survival and breeding success of agile antechinus (Antechinus agilis), dusky antechinus (A. swainsonii) and bush rats (Rattus fuscipes)." Wildlife Research 34, no. 6 (2007): 437. http://dx.doi.org/10.1071/wr07071.
Повний текст джерелаАнотація:
Extreme weather conditions, such as drought, significantly decrease the survival and breeding success of numerous species. Despite the frequent occurrence of such conditions in Australia, little is known about the effects of changing environmental conditions on the native small mammals. This study, conducted from 2002 to 2004, focussed on sympatric wild populations of the agile antechinus (Antechinus agilis), with more limited information on the dusky antechinus (A. swainsonii) and the bush rat (Rattus fuscipes). Bodyweights of agile antechinus before and during the breeding season were significantly lower in 2003 (drought) than in 2002 or 2004. Survival of female agile antechinus and the number of young per litter also decreased significantly during drought. In contrast, the dusky antechinus showed no difference in mean bodyweights between years, high survival rates of females and similar litter sizes in 2002 and 2003. There was also no difference in bodyweight of bush rats between years. Low rainfall was recorded during pregnancy and lactation in the agile antechinus, but rainfall was higher during pregnancy and lactation in the dusky antechinus. The survival and breeding success of the agile antechinus may have been adversely affected by a combination of interspecific competition, timing of the breeding season and severity of the drought.
4
Beckman, J., and A. Lill. "morphometric variation associated with teat-number differences in Antechinus agilis and A. swainsonii ? Observations from the Otway Ranges, Victoria." Australian Mammalogy 29, no. 2 (2007): 177. http://dx.doi.org/10.1071/am07022.
Повний текст джерелаАнотація:
That there is intraspecific variation in teat-number in Antechinus agilis (agile antechinus) and A. swainsonii (dusky antechinus) has been known for a long time. Our aim was to determine whether other key morphometric traits differed among individuals with different numbers of teats. External body dimensions and pelage characteristics were measured on live individuals and compared. Within-species variation in some external body dimensions (tail, pes, and snout-vent length) coincided with teat-number differentiation in both antechinus species in the Otway Ranges, Victoria. Disparities in pelage colour and markings were apparent between A. agilis 6- and 10-teat phenotypes, but were not obvious among A. swainsonii teat phenotypes. Although small sample sizes obviated statistical analysis, we tentatively concluded that female A. agilis with 7, 8, or 9 teats in the Otway Ranges probably displayed morphometric and pelage characteristics intermediate between those of 6- and 10-teat individuals. A comparison of morphometric traits among 6-teat A. agilis from different geographic areas (Otways, Portland and Wilsons Promontory) also revealed some variation. This result was consistent with an expectation of clinal variation in external morphology among antechinus. Overall, this study indicates that localized disparities that are associated with teat-number, as well as clinal differences occurring over large geographic distances, contribute to intraspecific variation in external morphology in antechinus.
5
Baker, Andrew, T. Mutton, E. Mason, and E. Gray. "A taxonomic assessment of the Australian Dusky Antechinus Complex: a new species, the Tasman Peninsula Dusky Antechinus (Antechinus vandycki sp. nov.) and an elevation to species of the Mainland Dusky Antechinus (Antechinus swainsonii mimetes (Thomas))." Memoirs of the Queensland Museum - Nature 59 (2015): 75–126. http://dx.doi.org/10.17082/j.2204-1478.59.2015.2014-10.
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6
Cunningham, R. B., D. B. Lindenmayer, C. MacGregor, S. Barry, and A. Welsh. "Effects of trap position, trap history, microhabitat and season on capture probabilities of small mammals in a wet eucalypt forest." Wildlife Research 32, no. 8 (2005): 657. http://dx.doi.org/10.1071/wr04069.
Повний текст джерелаАнотація:
In this study, we use data drawn from a series of trapping events on four 0.5-ha trapping grids surveyed in the wet eucalypt forests of central Victoria, south-eastern Australia, to identify relationships between capture probabilities and several factors of interest for three species of small mammals that are common throughout the forests of this region: the agile antechinus (Antechinus agilis), the dusky antechinus (Antechinus swainsonii) and the bush rat (Rattus fuscipes). The design of our study – four regular trapping grids – generated spatio-temporal data with binary responses and many covariates. We used powerful and relatively new statistical methodology to deal with the spatio-temporal dependence patterns in the data – analytical problems that are common in trapping data such as these modelled here. Although A. agilis, A. swainsonii and R. fuscipes are among the best studied mammals in Australia, our data analysis produced new perspectives on their probability of being captured. In particular, we quantified how capture probability is affected by trap position within a trapping grid, day of capture in a sequence of trapping days, history of trap occupancy over time by different species and sexes of those species, time of the year or season, and microhabitat attributes. Our insights are discussed in terms of their consequences for trapping protocols that might be applied in the field.
7
Sanecki, Glenn M., Ken Green, Helen Wood, David Lindenmayer, and Karen L. Sanecki. "The influence of snow cover on home range and activity of the bush-rat (Rattus fuscipes) and the dusky antechinus (Antechinus swainsonii)." Wildlife Research 33, no. 6 (2006): 489. http://dx.doi.org/10.1071/wr05012.
Повний текст джерелаАнотація:
Radio-telemetry was used to investigate changes in home-range sizes and activity patterns of Rattus fuscipes and Antechinus swainsonii in a subalpine heathland at Perisher Creek, Kosciuszko National Park, southern New South Wales, in response to the accumulation of snow during the winter. We estimated home-range area for each animal during the autumn and winter using two methods, minimum convex polygon and 95% and 50% utilisation contours using the kernel method. With both methods, the home ranges of R. fuscipes and A. swainsonii were significantly smaller (P < 0.001) during the winter than in the autumn. In winter, both species were restricted to areas of dense wet heath close to the main drainage line. R. fuscipes showed signs of social interaction during both seasons, as indicated by location fixes and gnawing damage to radio-collars, in contrast to A. swainsonii, which appeared to remain solitary. In winter, R. fuscipes apparently nested at a single location, whereas during autumn it appeared to use several nest sites. There was no significant change in daily activity patterns between autumn and winter in either species. R. fuscipes remained primarily nocturnal during both prenival and nival periods whereas A. swainsonii continued to be active throughout the diel cycle, although there was a slight shift in its peak activity time from around sunset in autumn to early morning in winter.
8
Monamy, V. "An observation of free-living Dusky Antechinuses, Antechinus swainsonii (Marsupialia: Dasyuridae) during the breeding season." Australian Mammalogy 14, no. 1 (1991): 23. http://dx.doi.org/10.1071/am91003.
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9
Bradley, A. J., and V. Monamy. "A physiological profile of male dusky Antechinuses, Antechinus swainsonii (Marsupialia: Dasyuridae) surviving the post-mating mortality." Australian Mammalogy 14, no. 1 (1991): 25. http://dx.doi.org/10.1071/am91004.
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10
Green, K. "Altitudinal and temporal differences in the food of foxes (Vulpes vulpes) at alpine and subalpine altitudes in the Snowy Mountains." Wildlife Research 30, no. 3 (2003): 245. http://dx.doi.org/10.1071/wr02008.
Повний текст джерелаАнотація:
The diet of foxes over three years at alpine and subalpine altitudes in the Snowy Mountains followed a cyclical change determined by seasonal climatic events that were very marked and predictable and did not allow for great variation in timing of prey availability. The diet was dominated by mammals in winter, with a change in the snow-free months to insects, mainly comprising bogong moths, with grasshoppers becoming important later in the season. Mammals preyed upon at both altitudes were mainly broad-toothed rats (Mastacomys fuscus), bush rats (Rattus fuscipes) and dusky antechinus (Antechinus swainsonii). In the alpine zone, foxes were less dependent upon the food chain deriving from in situ primary productivity than were foxes in the subalpine zone and were more reliant on other energy sources, particularly immigrant bogong moths.
11
McDonald, I. R., A. K. Lee, K. A. Than, and R. W. Martin. "Failure of glucocorticoid feedback in males of a population of small marsupials (Antechinus swainsonii) during the period of mating." Journal of Endocrinology 108, no. 1 (January 1986): 63–68. http://dx.doi.org/10.1677/joe.0.1080063.
Повний текст джерелаАнотація:
ABSTRACT In an investigation of the factors leading to the increase in the concentration of plasma free glucocorticoid, which results in immunosuppression and death after mating of all males in natural populations of a small shrew-like marsupial, the dusky antechinus (Antechinus swainsonii), the integrity of the glucocorticoid feedback control of the concentration of plasma cortisol was examined by use of dexamethasone-suppression tests. Injection of 0·2 mg dexamethasone/kg i.m. caused a marked fall in the concentration of plasma cortisol 17 h later, approximately 2 months and 2 weeks before the annual mating period in mid-July. However, the same dose had no significant effect on the increased concentration of plasma cortisol characteristic of the mid- to late July mating period. Injection of 100 i.u. ACTH/kg i.m. caused a significant increase in the concentration of plasma cortisol 6–7 h later on all occasions, indicating that the responsiveness of the adrenal cortex to ACTH did not change. Pretreatment with dexamethasone had no effect on the ACTH-stimulated cortisol concentration, ruling out a possible direct effect of dexamethasone on adrenocortical secretion in this species. Dexamethasone also reduced the concentration of plasma testosterone when the level was low, before the mating period, but not when the level was high, at the beginning of the mating period. It is concluded that, in association with a rapid increase in the concentration of plasma testosterone, an increase in aggression and intense mating activity, glucocorticoid feedback control of ACTH secretion is impaired. This contributes to the rapid and sustained rise in the concentration of plasma free cortisol to immunosuppressive levels. J. Endocr. (1986) 108, 63–68
12
Green, K., and H. Crowley. "Energetics and Behavior of Active Subnivean Insectivores Antechinus-Swainsonii and Antechinus-Stuartii (Marsupialia, Dasyuridae) in the Snowy Mountains." Wildlife Research 16, no. 5 (1989): 509. http://dx.doi.org/10.1071/wr9890509.
Повний текст джерелаАнотація:
Antechinus spp. respond to a snow-covered environment by increasing their metabolic rate and by occupying an insulated nest while not active. However, the two species occurring in the Snowy Mountains have different behavioural adaptations: Antechinus swainsonii is diurnal (allowing the benefits of basking in the sun), whereas A. stuartii is nocturnal and makes frequent visits to a communal nest. Antechinus stuartii is able to survive the winter with a lower ratio of field metabolic rate to basal metabolic rate, indicating that it is energetically less stressed and better adapted to existence in the cold per se than is A. swainsonii. However, A. swainsonii appears to forgo the energetic benefits of communal nesting in favour of the lesser competition for food afforded by solitary nesting.
13
Davison, A. "Dentition of Victorian Antechinus species (Marsupialia: Dasyuridae)." Australian Mammalogy 9, no. 2 (June 1, 1986): 73–85. http://dx.doi.org/10.1071/am86012.
Повний текст джерелаАнотація:
The dentitions of Victoria's currently recognised subspecies of Antechinus (A. stuartii stuartii, A. flavipes flavipes, A . minimus maritimus and A. swainsonii mimetes) are described and illustrated. Subspecies from other states compared are: A. stuartii adustus, A . f!avipes leucogaster, A. minimus minimus and A. swainsonii swainsonii. All species were clearly distinct on the basis of dental morphology. Of the subspecies examined, all except A. flavipes flavipes and A. f!avipes leucogaster were found to differ dentally.
14
Geng, Yuepan, Chen Yang, Han Guo, Patrick B. Thomas, Penny L. Jeffery, Lisa K. Chopin, Andrew M. Baker, Ran Tian, and Inge Seim. "The mitochondrial genome of the black-tailed dusky antechinus (Antechinus arktos)." Mitochondrial DNA Part B 5, no. 4 (October 1, 2020): 3835–37. http://dx.doi.org/10.1080/23802359.2020.1840940.
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15
Watchorn, Darcy J., Kita R. Ashman, and Dan K. P. Harley. "Observations of arboreal behaviour in the mainland dusky antechinus (Antechinus mimetes)." Australian Mammalogy 42, no. 2 (2020): 226. http://dx.doi.org/10.1071/am19022.
Повний текст джерелаАнотація:
During camera-trapping surveys for arboreal mammals within Yellingbo Nature Conservation Reserve we recorded arboreal behaviour in the mainland dusky antechinus, which is typically regarded as a strictly terrestrial species. The species was detected visiting baits positioned ~3.5m high on trees on 29 occasions, providing additional evidence of arboreal behaviour in the species and further demonstrating the value of camera traps in providing novel insights into animal behaviour.
16
Green, K. "Altitudinal and Seasonal Differences in the Diets of Antechinus-Swainsonii and Antechinus-Stuartii (Marsupialia, Dasyuridae) in Relation to the Availability of Prey in the Snowy Mountains." Wildlife Research 16, no. 6 (1989): 581. http://dx.doi.org/10.1071/wr9890581.
Повний текст джерелаАнотація:
The diets of Antechinus stuartii and A. swainsonii and the availability of their prey were studied in the Snowy Mountains in areas subjected to a winter cover of snow. Active prey were found to be less common in winter than summer and less common at higher than lower altitudes. The prey taken were more likely to reflect availability (as measured either by pitfall traps or litter samples) where prey was scarce. The diet varied between years but within years was more variable for A. stuartii than for A. swainsonii, possibly because A. stuartii was able to feed in trees in summer but not in winter, whereas A. swainsonii foraged only on the ground in all seasons. Antechinus stuartii and A. swainsonii fed on different types of prey at low subalpine altitudes (1600 m), where they foraged in different microhabitats; this difference was also reflected in the sizes of prey consumed. At high subalpine altitudes (1850 m), A. stuartii and A. swainsonii fed on both the same type and the same size of prey, indicating that the two species did not select different prey sizes but that prey size was determined by the size of food available to each species. Predation on a particular group by A. swainsonii in summer was more likely if that prey group was also available in winter. This suggests that by improving its skills at finding and catching these prey, A. swainsonii was better fitted for survival through the winter. This may help explain the greater abundance of A. swainsonii and the decline in numbers of A. stuartii almost to local extinction in snow-covered areas.
17
Green, K. "Autumnal body mass reduction in Antechinus swainsonii (Dasyuridae) in the Snowy Mountains." Australian Mammalogy 23, no. 1 (2001): 31. http://dx.doi.org/10.1071/am01031.
Повний текст джерелаАнотація:
Autumnal body mass reduction in a seasonally snow-covered environment is reported for Antechinus swainsonii (Marsupialia: Dasyuridae), thus extending the phylogenetic spectrum in which this phenomenon is known. Above 1600 m altitude the average mass of individual A. swainsonii falls from 48.6 g to 42.6 g (a 12.3% loss) from April to May. The difference in mass results from a reduction in lean mass rather than a metabolisation of fat reserves. In A. swainsonii, the need to increase body mass in late summer only to lose it in autumn prior to a winter beneath the snow seems superfluous. However, the higher mass may be necessary to survive the harsher microclimate in autumn before conditions ameliorate beneath the snow cover. Survival from April to May is higher in heavier animals (that do lose mass in autumn) than lighter animals (with mass in April equal to that of animals after loss of body mass). These lighter animals disappear from the population in autumn. With snow cover in place, A. swainsonii is able to increase mass in winter.
18
Righetti, Joanne, Barry J. Fox, and David B. Croft. "Behavioural mechanisms of competition in small dasyurid marsupials." Australian Journal of Zoology 48, no. 5 (2000): 561. http://dx.doi.org/10.1071/zo00023.
Повний текст джерелаАнотація:
The competitive behaviour of three species of small dasyurid marsupial, Antechinus swainsonii, Antechinus stuartii and Sminthopsis murina, was assessed in specially designed enclosures and smaller encounter cages, by videotaping the activity of pairs of animals, both as conspecifics and members of different species (except for A. swainsoni versus S. murina). Spatio-temporal analyses revealed differences in activity patterns and interactions within and between the species. Interference competition occurred in all intraspecific and interspecific comparisons tested. Encounter competition was judged to be the mechanism operating as all animals entered into interactions with other individuals. Encounters were particularly prevalent within Antechinus, indicating that they were more social than the relatively solitary Sminthopsis. Avoidance behaviour occurred between the two Antechinus species and this may enable them to coexist, so that this mechanism may be considered to be avoidance competition. The smaller competitor, S. murina, showed avoidance of the larger A. stuartii. Intraspecific competition was judged to be stronger than interspecific competition, but the latter could have more severe consequences, with the death of the smaller species occurring in some situations. This highlighted the asymmetric nature of competition, with body size determining the outcome of interactions between species.
19
Gray, Emma L., Andrew M. Baker, and Jennifer Firn. "Autecology of a new species of carnivorous marsupial, the endangered black-tailed dusky antechinus (Antechinus arktos), compared to a sympatric congener, the brown antechinus (Antechinus stuartii)." Mammal Research 62, no. 1 (June 24, 2016): 47–63. http://dx.doi.org/10.1007/s13364-016-0281-1.
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20
Kirsch, JAW, C. Krajewski, MS Springer, and M. Archer. "Dna-Dna Hybridization Studies of Carnivorous Marsupials .2. Relationships Among Dasyurids (Marsupialia, Dasyuridae)." Australian Journal of Zoology 38, no. 6 (1990): 673. http://dx.doi.org/10.1071/zo9900673.
Повний текст джерелаАнотація:
A suite of comparisons among ten radiolabelled dasyurid species and one outgroup bandicoot was generated using the hydroxyapatite chromatography method of DNA-DNA hybridisation; comparisons were also made with four other dasyurid taxa. Square matrices of DELTA-T(m)s, DELTA-Modes, and DELTA-T50H's were complied and corrected for reciprocity, additivity, and, in the case of DELTA-T(m)'s, normalised percentages of hybridisation. These matrices were analysed using the FITCH algorithm in Felsenstein's PHYLIP (Version 3.1), and all distinct topologies were jackknifed to test for internal consistency. Additionally, uncorrected DELTA-T(m), DELTA-Mode, and DELTA-T50H datasets were bootstrapped and subjected to phylogenetic analysis to assess measurement imprecision. FITCH trees from folded matrices including unlabelled species or those for which heteroduplex comparisons were incomplete were also calculated and jack-knifed, both before and after correction. With the exception of limited measurements to Dasyuroides byrnei and Dasykaluta rosamondae, which showed affinities with Dasyurus spp., the final tree was fully resolved: Sminthopsis crassicaudata and S. murina, together with the more distant Planigale maculata, are the sister-group to all other dasyurids examined, which in turn comprise two clades. One of these includes Dasyurus, Dasyuroides, and Dasykaluta; the other, 'true' Antechinus (A. flavipes, A. stuartii, A. swainsonii) as a sister-group to Antechinus melanurus plus Murexia longicaudata, with Phascogale tapoatafa representing a probable sister-group to all Antechinus with Murexia. DNA-DNA hybridisation provides no support for the genus Satanellus: most of the trees linked Dasyurus albopunctatus with D. maculatus instead of D. hallucatus. Similarly, Antechinus flavipes and A. stuartii appear to be closer to each other than either is to A. swainsonii. The historical biogeographic significance of the adopted phylogeny is considered, and it is concluded that the putative early Miocene separation of Australia and New Guinea was probably too early to account for the independent evolution of the New Guinean clade.
21
Gray, Emma L., Chris J. Burwell, and Andrew M. Baker. "Benefits of being a generalist carnivore when threatened by climate change: the comparative dietary ecology of two sympatric semelparous marsupials, including a new endangered species (Antechinus arktos)." Australian Journal of Zoology 64, no. 4 (2016): 249. http://dx.doi.org/10.1071/zo16044.
Повний текст джерелаАнотація:
The endangered black-tailed dusky antechinus (Antechinus arktos) was described in 2014, so most aspects of its ecology are unknown. We examined diet composition and prey selection of A. arktos and a sympatric congener, the northern form of A. stuartii, at two sites in Springbrook National Park. Overall, taxa from 25 invertebrate orders were identified in the diets from 252 scat samples. Dietary components were similar for each species, but A. arktos consumed a higher frequency and volume of dipteran larvae and Diplopoda, while A. stuartii consumed more Coleoptera, Lepidoptera, Orthoptera and Isopoda. Both species of Antechinus had a higher percentage of ‘empty’ scats (devoid of any identifiable invertebrate material) in 2014 compared with 2015. The former was a drier year overall. Lower rainfall may have reduced abundance and diversity of arthropod prey, causing both species to supplement their diet with soft-bodied prey items such as earthworms, which are rarely detected in scats. Comparison of prey in scats with invertebrate captures from pitfall traps showed both species to be dietary generalists, despite exhibiting distinct preference and avoidance of certain prey categories. The ability of an endangered generalist marsupial to switch prey may be particularly advantageous considering the anticipated effects of climate change on Gondwanan rainforests during the mid-late 21st century.
22
Lunney, Daniel, Alison Matthews, Peggy Eby, and Angela M. Penn. "The long-term effects of logging for woodchips on small mammal populations." Wildlife Research 36, no. 8 (2009): 691. http://dx.doi.org/10.1071/wr08028.
Повний текст джерелаАнотація:
Context. Long-term studies are internationally recognised as an essential component of achieving ecologically sustainable forest management with respect to fauna. Aims. This study aimed to assess longer-term responses of small mammals to logging by returning in 1998 to our 1980–83 study sites in south-eastern New South Wales, Australia. Methods. Three age-classes of forest were surveyed: unlogged; 18–19-year-old regrowth; and 26–34-year-old regrowth. Key results. Rattus fuscipes remained affected by logging, and there were significantly fewer R. fuscipes males in logged, north-west-facing sites than at other sites, although the effect was less pronounced in 1998 than in 1980–83. Antechinus agilis females were significantly less numerous in south-east-facing, unlogged forest. This was not expected from the 1980–83 results. Antechinus swainsonii, which had disappeared following a fire in 1980, had returned to the forest by 1998. A. swainsonii females showed a significant preference for south-east-facing slopes and this relationship was consistent between logged and unlogged forest. No members of Mus musculus or Sminthopsis leucopus, which were present in 1980–83, were caught in 1998. Conclusions. As in the 1980s study, the responses of small mammal species to logging history were varied and species specific. Implications. In our study area, we predict that sustained logging for woodchips will continue to deplete its populations of small mammals. This adds to the case for a more robust and sustained approach to researching and managing our forest fauna.
23
Lunney, Daniel, Alison Matthews, and Jan Grigg. "The diet of Antechinus agilis and A. swainsonii in unlogged and regenerating sites in Mumbulla State Forest, south-eastern New South Wales." Wildlife Research 28, no. 5 (2001): 459. http://dx.doi.org/10.1071/wr00015.
Повний текст джерелаАнотація:
Analyses of the diets of Antechinus agilis and A. swainsonii from Mumbulla State Forest examined possible differences between species, sexes, logging treatment and aspect. Taxa from 15 orders were identified in the diet, and were predominantly terrestrial invertebrates. Overall, the dietary components were similar for each species, but the frequencies taken showed some differences. A. swainsonii ate more Diplopoda, Chilopoda and Blattodea egg capsules, while A. agilis ate more weevils (Coleoptera: Curculionidae). Male A. agilis ate more coleopteran larvae, while females ate more Araneae. This difference in Araneae in the diet between sexes of A. agilis was significant in logged forest but not in unlogged forest. Female A. swainsonii ate more Isoptera than did males. The frequency of occurrence of lepidopteran larvae taken by A. agilis differed across the three age-classes of forest, with more taken in 26–34-year-old regrowth forest and none in unlogged forest. Vertebrate remains – small skinks (Lampropholis spp.) and feathertail glider (Acrobates pygmaeus) – were found only in A. agilis; these occurred infrequently in the diet. These interspecific differences, sex differences and, most importantly, differences between age classes of forest warrant further investigation, particularly those relating to foraging patterns and prey availability.
24
Penn, Angela M., William B. Sherwin, Daniel Lunney, and Peter B. Banks. "The effects of a low-intensity fire on small mammals and lizards in a logged, burnt forest." Wildlife Research 30, no. 5 (2003): 477. http://dx.doi.org/10.1071/wr02080.
Повний текст джерелаАнотація:
This study summarises the results of a patchy, low-intensity hazard-reduction burn on the small mammals and lizards of Mumbulla State Forest and Biamanga National Park. About half of the study sites in the patchwork of alternate logging regrowth and unlogged forest had been burnt in April 1999. Prior to burning (winter 1998), there were significantly more Antechinus agilis in those north-west-facing sites that burnt in 1999, than in the south-east sites that burnt. By 15 months post-burning this trend had reversed, with more A. agilis in the burnt south-east sites. In contrast, burning had an initially positive effect on the abundance of Rattus fuscipes, with significantly more in the burnt south-east than burnt north-west sites four months post-burning compared with 1998 (pre-burning). This influence of aspect may be attributable to the fact that fires generally burn more intensely on the drier north-west slopes, removing more of the leaf litter and vegetative cover and making post-fire conditions harsher. Antechinus swainsonii became extremely scarce in the forest after the burning. Twenty months post-burning (summer 2000), there were significantly more Lampropholis delicata in the unburnt sites than in the burnt sites compared with 1999 (10 months post-burn). Lampropholis guichenoti were affected to a much lesser extent and recovered quickly, and Eulamprus heatwolei were generally unaffected by the burning. The hazard-reduction burn came 19 years after a high-intensity bushfire and logging operation in this forest. The results of the two fires were similar for the two Antechinus species and the Eulamprus species but contrasted for the other species. Hazard-reduction burning is widespread and accepted as a management tool and, following the New South Wales bushfires of 1994–95 and 2001–02, will probably increase in use. Our results, however, suggest that the biodiversity impacts of burning are complex and multidirectional, posing a significant challenge to conservation managers.
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Brooker, BM, and PC Withers. "Kidney Structure and Renal Indexes of Dasyurid Marsupials." Australian Journal of Zoology 42, no. 2 (1994): 163. http://dx.doi.org/10.1071/zo9940163.
Повний текст джерелаАнотація:
Examination of kidney structure for 25 dasyurid marsupials showed that kidneys of species from arid habitats tend to have a relatively thicker medulla and higher renal indices than those of species from semi-arid, mesic and tropical areas. Arid-dwelling species such as Ningaui ridei and Pseudantechinus macdonnellensis had the highest renal indices while Antechinus swainsonii, collected from alpine environments, had the lowest renal index values. Renal indices were significantly correlated also with body weight, average daily maximum temperature and average annual rainfall of the habitat. The renal indices for xeric species differed significantly by discriminant analysis from the indices for other species. There was no obvious phylogenetic conservatism in renal indices; for example, renal indices varied almost as much within the genus Sminthopsis as between all of the other genera of Dasyuridae examined.
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Happold, D. C. D. "A 10-year demographic study of a small mammal community in the Australian Alps." Australian Journal of Zoology 63, no. 5 (2015): 338. http://dx.doi.org/10.1071/zo15033.
Повний текст джерелаАнотація:
This paper describes a 10-year study of the community of two species of small rodents (Mastacomys fuscus, Rattus fuscipes) and one species of dasyurid marsupial (Antechinus swainsonii) in the subalpine zone of the Australian Alps. Each species exhibited differing life-histories with respect to population numbers, intra- and interannual fluctuations in numbers, reproduction, proportion of young in the population, winter survival, immigration and longevity. Of the two species of rodents, M. fuscus had the lowest population numbers, was the least fecund, had the highest rate of survival, and the smallest fluctuations in numbers. A. swainsonii was the least numerous species, and the winter die-off of males and the high fecundity of females resulted in much greater fluctuations in numbers than for either rodent. For all species, there were interannual variations in most demographic parameters, suggesting considerable flexibility in response to annual variations in the environment. None of the three species is known to hibernate, nor is there any evidence of cyclicity, as shown by some species of subarctic and arctic small mammals. Comparisons are made with subalpine small mammals in other parts of the world and the influence of the subalpine environment in determining population numbers is considered.
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Riordan, Caitlin E., Coral Pearce, Bill J. F. McDonald, Ian Gynther, and Andrew M. Baker. "Vegetation structure and ground cover attributes describe the occurrence of a newly discovered carnivorous marsupial on the Tweed Shield Volcano caldera, the endangered black‐tailed dusky antechinus ( Antechinus arktos )." Ecology and Evolution 10, no. 4 (February 2020): 2104–21. http://dx.doi.org/10.1002/ece3.6045.
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Twyford, K. L. "Habitat Relationships of Small Mammals at Port Campbell National Park, Victoria." Australian Mammalogy 20, no. 1 (1998): 89. http://dx.doi.org/10.1071/am97089.
Повний текст джерелаАнотація:
Habitat relationships of six species of small mammals was investigated in eight vegetation communities at Port Campbell National Park, Victoria. The dispersion of 317 trap captures over 10 months was used to assess the relationships of small mammals with different vegetation communities. Rattus fuscipes showed a strong affinity for dense, structurally complex vegetation, particularly a disused softwood plantation and to a lesser extent a closed-heath/low open-forest community. Captures of Rattus lutreolus were most frequent in the wetter communities which provided adequate cover, particularly the swamp community. A possible relationship between captures of this species and the abundance of sedge food resources is suggested. Antechinus swainsonii was captured in greatest numbers in tussock-grassland/low open-shrubland where dense ground cover was present. However, areas with dense mid-storey cover which were considered to be favourable habitat supported few individuals. Sminthopsis leucopus, although captured at low rates in only two communities, favoured more open vegetation than both A. swainsonii and A. minimus. The later species was captured rarely, but exclusively in open-heath, although more favourable habitat appeared to be present elsewhere in the Park. The low abundance of Mus musculus was attributed to a lack of habitat available at an early successional stage. A mammal species list for the Park of 15 species has been compiled based on trapping, incidental observations and indirect traces. Key areas for conservation of small mammals within the Park are identified.
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Bubela, T. M., C. R. Dickman, and A. E. Newsome. "Diet and Winter Foraging Behaviour of The Red Fox (Vulpes vulpes) In Alpine and Subalpine New South Wales." Australian Mammalogy 20, no. 3 (1998): 321. http://dx.doi.org/10.1071/am98321.
Повний текст джерелаАнотація:
Foxes were studied from January 1991 to January 1993 in 167 square kilometres of the alpine and subalpine areas of Kosciusko National Park, New South Wales, Australia (36 24' S, 148 26' E, 1260-2238 m altitude). The study area encompassed two ski resorts. This study confirmed the varied nature of the diet of the red fox. Foxes are mainly insectivorous during snow-free months, but also prey upon three small mammal species, Antechinus swainsonii, Mastacomys fuscus and Rattus fuscipes. Direct observations indicate that human refuse from ski resorts is food for foxes in winter. It is probable that this supplementary food source sup- ports a higher density fox population than would occur in its absence. The management implications for populations of native small mammals of predation and supplementary food for foxes are discussed. We recommend that the impact of red fox predation on small mammals, particularly M. fuscus be assessed and that action be taken to limit the availability of human refuse to foxes in winter.
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Cribb, T. H., and D. M. Spratt. "Strzeleckia major n. g., n. sp. and S. minor n. sp. (Digenea: Hasstilesiidae) from Antechinus swainsonii (Marsupialia: Dasyuridae) in Australia." Systematic Parasitology 19, no. 1 (May 1991): 73–79. http://dx.doi.org/10.1007/bf00010304.
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Gray, Emma L., Todd E. Dennis, and Andrew M. Baker. "Can remote infrared cameras be used to differentiate small, sympatric mammal species? A case study of the black-tailed dusky antechinus, Antechinus arktos and co-occurring small mammals in southeast Queensland, Australia." PLOS ONE 12, no. 8 (August 9, 2017): e0181592. http://dx.doi.org/10.1371/journal.pone.0181592.
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Recher, Harry F., Daniel Lunney, and Alison Matthews. "Small mammal populations in a eucalypt forest affected by fire and drought. I. Long-term patterns in an era of climate change." Wildlife Research 36, no. 2 (2009): 143. http://dx.doi.org/10.1071/wr08086.
Повний текст джерелаАнотація:
This paper reports a study of ground-dwelling, small mammals in coastal eucalypt forest in south-eastern Australia from 1970 through 2005. During this time, the study area burnt in an intense fire in December 1972 and was partially burnt in November 1980. Both fires were associated with prolonged drought. The mammals studied comprised two dasyurid marsupials, Antechinus agilis and A. swainsonii, two native murid rodents, Rattus fuscipes and R. lutreolus, and the introduced house mouse Mus musculus. After intensive sampling throughout the year from 1970 through 1972 to establish basic ecological and population parameters of the small mammal community, populations were sampled annually during late autumn and early winter before the onset of breeding. There were marked differences in the annual (autumn/winter) abundances of all species; numbers of A. agilis ranged from 4 to 142 individuals; A. swainsonii 0 to 43; R. fuscipes 4 to 54; R. lutreolus 0 to 11; M. musculus 0 to 23. Following the 1972 fire, numbers fell to the lowest level recorded during the study and each population subsequently disappeared from the plot between the 1973 and 1974 winter censuses. The less intense 1980 fire did not lead to extirpation, but numbers of A. agilis, A. swainsonii and R. fuscipes declined as drought conditions persisted through 1983. R. lutreolus occurred consistently only following the fires, when a grassy ground vegetation favoured by this species developed. Similarly, M. musculus colonised within two years of the fires and persisted on the plot for 3–4 years before disappearing. Following the fires, populations of the omnivorous R. fuscipes recovered first followed by the scansorial, insectivorous A. agilis and last by the fossorial, insectivorous A. swainsonii. Two primary conclusions emerged from this study. First, the intense fire of 1972 did not kill all the animals immediately, but led to the disappearance of each species from the plot over 18 months. Thus, intense fire had a delayed but catastrophic impact on small ground-dwelling mammals. The fluctuations in population levels, covering more than an order of magnitude, demonstrate that factors other than fire, such as rainfall and drought, drive the population dynamics of these small mammals. As stability and recovery are not features of local populations, long-term studies of benchmark populations are necessary to manage forest biodiversity.
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Mansergh, I., B. Baxter, D. Scotts, T. Brady, and D. Jolley. "Diet of the Mountain Pygmy-possum, Burramys parvus (Marsupialia: Burramyidae) and other small mamma ls in the alpine environment at Mt Higginbotham, Victoria." Australian Mammalogy 13, no. 2 (1990): 167. http://dx.doi.org/10.1071/am90017.
Повний текст джерелаАнотація:
The diets of Burramys parvus, Rattus fuscipes and Antechinus swainsonii in Podocarpus lawrencei heathland in alpine Victoria during the non-winter period were determined from analysis of 264 faecal pellets. Both frequency of occurrence and mean percentage composition of dietary items in the samples were determined; the Iatter being used to assess the diet. We found B. parvus to be an omnivore concentrating on insec ts. It eats a variety of foods but the Bogong Moth (Agrolis infusa) is heavily exploited (31 % of the composition of faecal samples) especially by females during the breeding season (46 %). Other components of the diet are other invertebrates, predominantly insects (32 %) and vegetative material (16 %). Seasonal differences in the composition of the diet of B. parvus were due to the exploitation of fruit in the non-breeding season. No differences in diet were observed between age-classes and the sexes but females are sedentary in food resource-rich habitats, whilst when not breeding, males occur in areas of poorer food resources. Circumstantial evidence suggests that during facultative hibernation a major dietary component of B. parvus may be seeds, cached from the previous summer-autumn. The diet of R. fuscipes consists mainly of insects (12 %) and the largest vegetative component was seeds (10.1 %). Fungi were found in 53 % of faecal samples of R. fuscipes but could not be quantified as a percentage composition of diet. The species is classified as a selective omnivore. The diet of A. swainsonii consisted of 68 % in sec ts, 10.4 % of insect setae and worms with the major vegetative component (5.2 %) being soft fruits. Burramys parvus, relative to the other small mammals with which it cohabits, has become a specialist in exploiting the abundant and rich food resource of Bogong moths.
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SPRATT, DAVID M. "New records of filarioid nematodes (Nematoda: Filarioidea) parasitic in Australasian monotremes, marsupials and murids, with descriptions of nine new species." Zootaxa 2860, no. 1 (April 29, 2011): 1. http://dx.doi.org/10.11646/zootaxa.2860.1.1.
Повний текст джерелаАнотація:
Filarioid nematodes (Nematoda: Filarioidea) parasitic in Australasian monotremes, marsupials and murid rodents are described from three genera, Breinlia (Breinlia), Pelecitus and Sprattia. New host and geographic records are presented for 24 previously described species from these genera, a second subgenus, Breinlia (Johnstonema) and an additional three genera, Cercopithifilaria, Monanema and Pelecitus. Nine species are described as new, B. (B.) beveridgei sp. nov. from the peritoneal cavity of Macropus parryi Bennett, B. (B.) bigenera sp. nov. from the peritoneal and pleural cavities of Aepyprymnus rufescens (Gray), Onychogalea fraenata (Gould), O. unguifera (Gould) and possibly Antechinus swainsonii (Waterhouse), B. (B.) dorcopsis sp. nov. from the peritoneal cavity of Dorcopsis hageni Heller and D. luctuosa (D’Albertis), B. (B.) melomyos sp. nov. from the peritoneal cavity of Melomys cf. burtoni, B. (B.) oweni sp. nov. from the peritoneal cavity of Dactylopsila trivirgata Gray, B. (B.) presidentei sp. nov. from the peritoneal cavity of Mesembriomys gouldii (Gray), M. macrurus (Peters) and the pleural and peritoneal cavities of Conilurus penicillatus (Gould), B. (B.) tricondylus sp. nov. from the peritoneal cavity of Macropus rufogriseus banksianus (Quoy & Gaimard), B. (B.) zyzomyos sp. nov. from the peritoneal cavity of Zyzomys woodwardi (Thomas) and Z. argurus (Thomas), and Sprattia spearei sp. nov. from the lung (probably blood vessels) of Isoodon macrourus (Gould) . The female of B. (J.) woerlei from the pulmonary artery, right ventricle and lung cysts of Petrogale brachyotis (Gould) is described for the first time. Breinlia (J.) andersoni Spratt & Varughese, 1975 from the subcutaneous connective tissues of Macropus rufus (Desmarest), M. giganteus Shaw, M. robustus erubescens Sclater and Wallabia bicolor (Desmarest) is placed as a synonym of B. (J.) annulipapillata (Johnston & Mawson, 1938) from the subcutaneous connective tissues of M. dorsalis (Gray), O. fraenata and W. bicolor. In general, filarioids predominate in macropodoid hosts and in the north of Australia.
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Lunney, D., B. Cullis, and P. Eby. "Effects of logging and fire on small mammals in Mumbulla State Forest, near Bega, New South Wales." Wildlife Research 14, no. 2 (1987): 163. http://dx.doi.org/10.1071/wr9870163.
Повний текст джерелаАнотація:
This study of the effects of logging on small mammals in Mumbulla State Forest on the south coast of New South Wales included the effects of a fire in November 1980 and a drought throughout the study period from June 1980 to June 1983. Rattus fuscipes was sensitive to change: logging had a significant impact on its numbers, response to ground cover, and recapture rate; fire had a more severe effect, and drought retarded the post-fire recovery of the population. The three species of dasyurid marsupials differed markedly in their response to ground cover, canopy cover, logging and fire. Antechinus stuartii was distributed evenly through all habitats and was not affected by logging, but fire had an immediate and adverse effect which was sustained by the intense drought. A. swainsonii markedly preferred the regenerating forest, and was not seen again after the fire, the failure of the population being attributed to its dependence on dense ground cover. Sminthopsis leucopus was found in low numbers, appeared to prefer forest with sparse ground cover, and showed no immediate response to logging or fire; its disappearance by the third year post-fire suggests that regenerating forest is inimical to the survival of this species. Mus musculus showed no response to logging. In the first year following the fire its numbers were still very low, but in the next year there was a short-lived plague which coincided with the only respite in the 3-year drought and, importantly, occurred in the intensely burnt parts of the forest. The options for managing this forest for the conservation of small mammals include minimising fire, retaining unlogged forest, extending the time over which alternate coupes are logged and minimising disturbance from heavy machinery.
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Lunney, D., A. Matthews, and B. Triggs. "Long-term changes in the mammal fauna of logged, coastal forests near Bega, New South Wales, detected by analysis of dog and fox scats." Australian Mammalogy 23, no. 2 (2001): 101. http://dx.doi.org/10.1071/am01101.
Повний текст джерелаАнотація:
In 1996, a study was undertaken to identify the mammals in Mumbulla State Forest near Bega on the south coast of New South Wales through the collection of dog and fox scats in the area. A total of 1121 scats was collected. The objective was to assess the changes in mammal fauna since 1981 when the first detailed analysis of predator scats was made after the forest was first logged for woodchips and sawlogs under the Eden woodchip agreement. The most notable change between the two surveys was a decrease in the canid diet of large mammals such as swamp wallaby and red-necked wallaby and the rabbit, and an increase of smaller mammals such as bush rat, long-nosed potoroo, common ringtail possum and dusky antechinus. The regrowth of the forest following logging, particularly of the understorey, increased available habitat for some species, such as the long-nosed potoroo. The shift to the smaller species was most pronounced in the diet of foxes. The decrease of rabbit in the canid diet was consistent with its relative abundance on adjacent farmland. The extensive 1996 scat collection also provided an opportunity to examine predator movements. Non-poisoned baits containing coloured markers were placed along the forest roads to determine how far dogs and foxes range between feeding and defecation. Of the marked scats collected in the forest, 67 % were found within 2 km and 94 % were found within 5 km of the bait station. These data will assist future researchers to find the locations of target species by narrowing the potential area to be searched. The primary finding of this study, namely that the mammal composition of the forest changed markedly between the two surveys, highlights the need to sample a forest through time to reveal the forest?s full ecological picture. It can be predicted that the mammal fauna composition will change again following the next logging cycle.
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Zaid, Erika, Alexei L. Vyssotski, and John A. Lesku. "Sleep architecture and regulation of male dusky antechinus, an Australian marsupial." Sleep, May 14, 2022. http://dx.doi.org/10.1093/sleep/zsac114.
Повний текст джерелаАнотація:
Abstract Study Objectives In this study, we (1) describe sleep behaviour and architecture, and (2) explore how sleep is regulated in dusky antechinus (Antechinus swainsonii), a small insectivorous marsupial. Our aim is to provide the first investigation into sleep homeostasis in a marsupial. Methods Wild-caught male dusky antechinus (n = 4) were individually housed in large indoor cages under a natural photoperiod of 10.5 h light / 13.5 h dark. Continuous recordings of EEG, EMG, and tri-axial accelerometry were performed under baseline conditions and following 4-h of extended wakefulness. Results Antechinus engage in SWS and REM sleep. Some aspects of these states are mammal-like, including a high amount (23%) of REM sleep, but other features are reminiscent of birds, notably, hundreds of short sleep episodes (SWS mean: 34 s; REM sleep: 10 s). Antechinus are cathemeral and sleep equally during the night and day. Immediately after the sleep deprivation ended, the animals engaged in more SWS, longer SWS episodes, and greater SWS SWA. The animals did not recover lost REM sleep. Conclusions Sleep architecture in dusky antechinus was broadly similar to that observed in eutherian and marsupial mammals, but with interesting peculiarities. We also provided the first evidence of SWS homeostasis in a marsupial mammal.
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Dickman, Christopher R., and David C. D. Happold. "Demographic and dietary responses of small mammals to high severity fire." Australian Zoologist, May 9, 2022. http://dx.doi.org/10.7882/az.2022.018.
Повний текст джерелаАнотація:
ABSTRACT Populations of many animal species decline after fire, with some individuals killed during the fire and others succumbing to impoverished conditions in the post-fire environment. For individuals that survive a fire, an ability to exploit scarce resources in the burnt landscape is particularly important. In this study, we compared the numbers, survival and diets of three species of small mammal at two sites in tall open-forest in the Australian Capital Territory, Australia. The first site was subjected to a high severity experimental fire in February 1980, while the second nearby site was unburnt and served as a control. Relative numbers and survival of the Agile Antechinus (Antechinus agilis) and Mainland Dusky Antechinus (A. mimetes) declined post-fire and remained lower than in the control site until spring 1980 when populations at both sites crashed following the post-mating death of males. These patterns reversed for A. mimetes in 1981 and 1982 and for A. agilis in 1982, with numbers and survival then being higher in the burnt than in the control site. Relative numbers of the Bush Rat (Rattus fuscipes) increased in a similar manner in both sites until the end of the study after 29 months, and monthly survival remained high throughout. The diets of the three species were similar between the control and burnt site before the fire. In the four months post-fire the diets of the two Antechinus species in the burnt site contained fewer ground-dwelling invertebrates compared with the control, whereas the dietary diversity of R. fuscipes in the burnt site increased due to increased consumption of food groups such as grasses and ferns that otherwise were seldom eaten. The dietary diversity of all species was similar between the two sites 12–16 months post-fire. The results suggest that the fire had short-term effects on the two species of Antechinus, most likely by depleting populations of their prey, while the demography of R. fuscipes was scarcely affected by fire owing to its ability to switch food groups within its already omnivorous diet. Dietary flexibility may be an important but often overlooked mechanism facilitating species’ persistence in post-fire environments.