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Artículos de revistas sobre el tema "Dasyuridae Reproduction"

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Publicado: 4 de junio de 2021

Última modificación: 31 de enero de 2023

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1

Wilson, BA. "Reproduction in the Female Dasyurid Antechinus-Minimus-Maritimus (Marsupialia, Dasyuridae)." Australian Journal of Zoology 34, no. 2 (1986): 189. http://dx.doi.org/10.1071/zo9860189.

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Reproduction in female Antechinus minimus maritimus was investigated in the field and laboratory. Field data were obtained from a mark-recapture study. A laboratory colony was maintained to investigate the oestrous pattern, length of gestation and development of pouch young. Breeding occurred in winter with births in July or August. Gestation (mean � SD) was 30.6 � l.5 days for animals mated in the laboratory. Epithelial cells were present in the urine for 34.8 � 8.3 days, a lengthy period compared to A. stuartii (19.3 � 4.4 days). Ovaries from females before the breeding season contained smal

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2

Kitchener, DJ, N. Cooper, and a. Bradley. "Reproduction in Male Ningaui (Marsupialia, Dasyuridae)." Wildlife Research 13, no. 1 (1986): 13. http://dx.doi.org/10.1071/wr9860013.

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'Stages in the spermatogenic cycle of Ningaui ridei, N. yvonneae and N. timealeyi are defined and the phenology of these stages is presented. In males of Ningaui spp. sexual maturity is reached in the first year, such that after the end of July of each year almost all male Ningaui spp. are considered reproductively mature. Male Ningaui spp. in the active spermatogenic phase are found during the entire season of births (August-January in N. ridei and N. timealeyi but perhaps terminating earlier in N. yvonneae); testes regress to an immature spermatogenic stage after January. There is no indicat

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3

Woolley, PA, and A. Valente. "Reproduction in Sminthopsis-Longicaudata (Marsupialia, Dasyuridae) - Laboratory Observations." Wildlife Research 13, no. 1 (1986): 7. http://dx.doi.org/10.1071/wr9860007.

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Observations on the pattern of reproduction in Sminthopsis longicaudata, at present considered to be an endangered species, are presented. S. longicaudata is polyoestrous and in the laboratory females are in breeding condition from late winter (August) to early summer (December). They enter oestrus up to four times during the breeding season. Two litters were born 17 and 19 days post-mating, but the gestation period may be less than 15 days. The mean length of the oestrous cycle is 34.4 days. Both males and females may be able to breed in more than one season.

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4

Woolley, PA. "Reproduction in Dasykaluta-Rosamondae (Marsupialia, Dasyuridae) - Field and Laboratory Observations." Australian Journal of Zoology 39, no. 5 (1991): 549. http://dx.doi.org/10.1071/zo9910549.

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Observations on reproduction in both wild-caught and laboratory-maintained Dasykaluta rosamondae have led to the conclusion that this species is one of 10 dasyurid marsupials in which males die soon after their first mating period. D. rosamondae have a short annual breeding season. The females are monoestrous, mating in September and bearing the young in November. Laboratory-reared young are weaned at an age of about 3 1/2-4 months, in February and March, and juveniles appear in the field population at this time. Both mates and females reach sexual maturity at an age of about 10 months. In the

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5

Wooley, P. A. "Observations on Reproduction in Captive Parantechinus biiarni (Marsupialia: Dasyuridae)." Australian Mammalogy 18, no. 1 (1995): 83. http://dx.doi.org/10.1071/am95083.

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6

Woolley, PA. "Reproduction in Sminthopsis-Macroura (Marsupialia, Dasyuridae) .1. The Female." Australian Journal of Zoology 38, no. 2 (1990): 187. http://dx.doi.org/10.1071/zo9900187.

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A laboratory colony of S. macroura, founded by three females and four males, was maintained over four breeding seasons. Reproductive success was high and four generations were produced before the colony was disbanded. Descendants of these animals are still breeding in another laboratory 11 years after the founding of the colony. A detailed prescription for the maintenance and management of a breeding colony is given. The animals bred between June and February, most females first entering oestrus in the early months of the season, in July or August. Female young born early in the season (before

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7

Woolley, PA. "Reproduction in Sminthopsis-Macroura (Marsupialia, Dasyuridae) .2. The Male." Australian Journal of Zoology 38, no. 2 (1990): 207. http://dx.doi.org/10.1071/zo9900207.

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The breeding season of S. macroura extends from June to February, and individual males (both wild- caught and laboratory-reared) are capable of breeding over extended periods during the breeding season, and for up to three seasons, in the laboratory. Gross and histological changes in the reproductive organs and endocrine changes in relation to reproductive activity have been investigated. Males do not appear to reach sexual maturity until the season following that in which they were born, although spermatorrhoea may commence in the season of birth. Testis and epididymis weight of these males,

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8

Woolley, PA. "Reproduction in Pseudantechinus macdonnellensis (Marsupialia : Dasyuridae): Field and Laboratory." Wildlife Research 18, no. 1 (1991): 13. http://dx.doi.org/10.1071/wr9910013.

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Pseudantechinus macdonnellensis has a wide distribution within the arid zone of Australia. Observations have been made on reproduction in both newly captured and laboratory-maintained animals obtained from widely separated localities. They have a short annual breeding season; animals from the more westerly part of the range breed later in the year. Males are potentially capable of breeding in at least three seasons, and females in at least four. Females are monoestrous and the gestation period, timed from mating to birth, is from 45 to 55 days. The young are suckled for about 14 weeks in the l

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9

McAllan, B. M., and F. Geiser. "Photoperiod and the timing of reproduction in Antechinus flavipes (Dasyuridae: Marsupialia)." Mammalian Biology 71, no. 3 (May 2006): 129–38. http://dx.doi.org/10.1016/j.mambio.2006.01.005.

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10

Woolley, PA. "Reproduction in the Ningbing Antechinus (Marsupialia, Dasyuridae) - Field and Laboratory Observations." Wildlife Research 15, no. 2 (1988): 149. http://dx.doi.org/10.1071/wr9880149.

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The ningbing antechinus is a species of small dasyurid marsupial found in the Kimberley region of Western Australia. Observations on reproduction have been made on newly captured and laboratory maintained specimens. The breeding season is short and mating occurs in June. The young are born after a long gestation, estimated to be between 45 and 52 days, in late July and early August. They are weaned in November when about 16 weeks old and they reach sexual maturity at 10-11 months, in the first breeding season after birth. Both males and females are potentially capable of breeding in a second s

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11

Geiser, Fritz, and Pip Masters. "Torpor in relation to reproduction in the mulgara, Dasycercus cristicauda (Dasyuridae: Marsupialia)." Journal of Thermal Biology 19, no. 1 (February 1994): 33–40. http://dx.doi.org/10.1016/0306-4565(94)90007-8.

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12

Woolley, P. A. "Aspects of reproduction, and morphology of the penis, of Pseudantechinus woolleyae (Marsupialia : Dasyuridae)." Australian Journal of Zoology 65, no. 6 (2017): 357. http://dx.doi.org/10.1071/zo17086.

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Woolley’s Pseudantechinus, P. woolleyae, has remained virtually unstudied in the 30 years since its recognition in 1988 as a species distinct from P. macdonnellensis. It has a wide distribution in arid regions of Western Australia. What little is known of its biology comes largely from studies carried out over the years 1988–91 on one wild-caught female and her offspring, and a few specimens held in the collection of the Western Australian Museum. P. woolleyae is a seasonal breeder and young are born from late July to early October. They mature when ~7 months old. Both males and females are po

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13

Dickman, CR, DH King, M. Adams, and PR Baverstock. "Electrophoretic Identification of a New Species of Antechinus (Marsupialia, Dasyuridae) in Southeastern Australia." Australian Journal of Zoology 36, no. 4 (1988): 455. http://dx.doi.org/10.1071/zo9880455.

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Two electrophoretically distinct but morphologically cryptic forms of Antechinus 'stuartii', designated 'northern' and 'southern', occur together at Kioloa on the southern coast of New South Wales. These forms are distinguished by fixed allele differences in three proteins (albumin, glycollate oxidase and mannosephosphate isomerase) and by differences in allele frequencies for transferrin, and are separated by a Nei D of 0.11. The two forms are reproductively isolated in sympatry at Kioloa by asynchrony in the timing of reproduction, and may be considered separate biological species. Northern

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14

Woolley, PA. "Reproductive Pattern of Captive Boullanger Island Dibbers, Parantechinus apicalis (Marsupialia : Dasyuridae)." Wildlife Research 18, no. 2 (1991): 157. http://dx.doi.org/10.1071/wr9910157.

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The recent discovery in Western Australia of two island populations of the dibbler, Parantechinus apicalis, which is rare on the mainland, has provided an opportunity for further study of this species. Following the finding that all males in an island population died soon after the mating period in March, in contrast to mainland males which survive beyond their first breeding season in both the field and the laboratory, a study of the pattern of reproduction in captive island dibblers was made. Like mainland dibblers, island females were found to be monoestrous, and island males potentially ca

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15

Watt, Annemarie. "Population Ecology and Reproductive Seasonality in Three Species of Antechinus (Marsupialia : Dasyuridae) in the Wet Tropics of Queensland." Wildlife Research 24, no. 5 (1997): 531. http://dx.doi.org/10.1071/wr96033.

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The population and reproductive ecologies of three sympatric species of antechinus were examined in upland rainforests in the wet tropics of Queensland. The three species, Antechinus stuartii adustus, A. flavipes rubeculus and A. godmani, exhibited unusually low trapping success compared with that of sites in temperate regions of Australia. Spatial distributions were extremely patchy both between and within study sites. Comparison with trapping data for temperate populations of A. stuartii and A. flavipes suggests that densities in the wet tropics are among the lowest in Australia. The reprodu

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16

Friend, G. R., B. W. Johnson, D. S. Mitchell, and G. T. Smith. "Breeding, Population Dynamics and Habitat Relationships of Sminthopsis dolichura (Marsupialia : Dasyuridae) in Semi-arid Shrublands of Western Australia." Wildlife Research 24, no. 3 (1997): 245. http://dx.doi.org/10.1071/wr96070.

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Demographic data were gathered from two populations of the little long-tailed dunnart, Sminthopsis dolichura, inhabiting semi-arid nature reserves in the Western Australian wheatbelt in order to place the ecology of this species (formerly part of the Sminthopsis murina complex) in perspective. In all respects, S. dolichura is similar to S. murina from south-eastern Australia, and, indeed, to most other species of the Sminthopsis group. High mobility and transiency rates, an extended seasonal pattern of reproduction, relatively rapid development of the young and the probable existence of polyoe

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17

Selwood, L. "Synchronization of oestrus, ovulation and birth in female Antechinus stuartii (Marsupialia: Dasyuridae)." Australian Mammalogy 8, no. 2 (April 1, 1985): 91–96. http://dx.doi.org/10.1071/am85007.

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Reproduction and development were studied during six annual breeding seasons in 80 female Antechinus stuartii in laboratory colonies and in 34 females which were pregnant when trapped. Oestrus, ovulation and births were each highly synchronized within any one population from a specific locality in Victoria. Before ovulation, epithelial cells were present in the urine of the females for a mean of 20.0 clays &#xb1; 4.0 (S.D.) (N=72). Matings occurred in this period. In the colonies of animals from Kinglake, the first females came into oestrus over a 4-clay period in mid-July of 1976, 1982 an

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18

Crowther, M. S., P. B. S. Spencer, D. Alpers, and C. R. Dickman. "Taxonomic status of the mardo, Antechinus flavipes leucogaster (Marsupialia : Dasyuridae): a morphological, molecular, reproductive and bioclimatic approach." Australian Journal of Zoology 50, no. 6 (2002): 627. http://dx.doi.org/10.1071/zo02030.

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This paper uses a combined morphological, molecular and ecological approach to assess the taxonomic status of Antechinus flavipes leucogaster from Western Australia, and its relationship to A. flavipes flavipes from eastern Australia. Morphological analyses show that A. flavipes leucogaster is smaller and finer than its eastern Australian counterpart in both cranial and dental dimensions. Phylogenetic analyses of partial cytochrome-b sequences showed that A. flavipes flavipes and A. flavipes leucogaster form reciprocally monophyletic clades that have a relatively high level of divergence (appr

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19

Fletcher, TP. "Aspects of Reproduction in the Male Eastern Quoll, Dasyurus viverrinus (Shaw) (Marsupialia: Dasyuridae), with Notes on Polyoestry." Australian Journal of Zoology 33, no. 2 (1985): 101. http://dx.doi.org/10.1071/zo9850101.

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In captivity, mating activity of quolls reached a peak in late May-early June. Weights of the male accessory glands peaked about the time of mating, after which the glands regressed; in September they weighed considerably less. Weights of testes and epididymides did not vary so much, but by September spermatorrhoea had ceased and the seminiferous tubules had become aspermic. The disseminate prostate gland was divisible histologically into three segments: the anterior and posterior 2 segments had a single cell type in the tubule epithelium; but prostate 1 had two types. The three pairs of Cowpe

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20

Chen, Xiaolin, Chris R. Dickman, and Michael B. Thompson. "Diet of the mulgara, Dasycercus cristicauda (Marsupialia : Dasyuridae), in the Simpson Desert, central Australia." Wildlife Research 25, no. 3 (1998): 233. http://dx.doi.org/10.1071/wr97087.

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The diet of the mulgara, Dasycercus cristicauda, from the Simpson Desert in Queensland, was analysed using scats collected between 1990 and 1995. Insects, arachnids and rodents were the main classes of prey of D. cristicauda, but reptiles, centipedes and small marsupials were also consumed. Insects represented 92% by percentage frequency of occurrence in scats, while rodents represented 33% by percentage frequency. Invertebrate prey ≥6 mm in length and vertebrate prey occurred frequently in scats, but small prey ( 1–5 mm), when present, occurred in large numbers. D. cristicauda ate more indivi

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21

Friend, GR. "Ecological Studies of a Population of Antechinus bellus (Marsupialia : Dasyuridae) in Troprical Northern Australia." Wildlife Research 12, no. 2 (1985): 151. http://dx.doi.org/10.1071/wr9850151.

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A population of the fawn antechinus, Antechinus bellus, was monitored in tropical open-forest of the Northern Territory between June 1980 and January 1983. Sixty males and 66 females were captured and marked over 9525 trap-nights. The species exhibits the typical Antechinus life-history strategy, characterized by a highly synchronized mating period after which all males die. This field evidence supports earlier speculation based on laboratory studies and limited museum collections. Mating occurs over 2 weeks in late August and parturitions about a month later. Young remain attached to the nipp

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22

Bradley, A. J. "Reproduction and life history in the red-tailed phascogale,Phascogale calura(Marsupialia: Dasyuridae): the adaptive-stress senescence hypothesis." Journal of Zoology 241, no. 4 (April 1997): 739–55. http://dx.doi.org/10.1111/j.1469-7998.1997.tb05745.x.

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23

Masters, Pip, and Chris R. Dickman. "Population dynamics of Dasycercus blythi (Marsupialia: Dasyuridae) in central Australia: how does the mulgara persist?" Wildlife Research 39, no. 5 (2012): 419. http://dx.doi.org/10.1071/wr11156.

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Context Central Australia has been a graveyard for native mammals, with many small and medium-sized species becoming extinct or persisting in reduced geographical ranges in this region since the advent of European settlement. Species in the critical weight range (35–5500 g) have been affected most dramatically. Aims We compared the dynamics of two geographically distant populations of a medium-sized surviving desert mammal, the brush-tailed mulgara (Dasycercus blythi, ~100 g), and tested the hypothesis that this species’ persistence can be explained by its demographic plasticity. Methods Paire

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24

Czarny, N. A., K. E. Mate, and J. C. Rodger. "Acrosome stability in the spermatozoa of dasyurid marsupials." Reproduction, Fertility and Development 20, no. 2 (2008): 295. http://dx.doi.org/10.1071/rd07178.

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The spermatozoa of most marsupials lack nuclear stabilising disulfide-bonded protamines found in eutherian mammals. However, disulfide stabilisation has been observed in the acrosome of macropodid (Macropus eugenii) and phalangerid (Trichosurus vulpecula) marsupials. As a result this organelle, which is normally fragile in eutherian mammals, is robust and able to withstand physical and chemical challenge in these marsupials. The present study examined acrosomal characteristics of the spermatozoa of three dasyurid marsupials; the fat-tailed dunnart (Sminthopsis crassicaudata), eastern quoll (Da

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25

Foster, W. K., A. J. Bradley, W. Caton, and D. A. Taggart. "Comparison of growth and development of the red-tailed phascogale (Phascogale calura) in three captive colonies." Australian Journal of Zoology 54, no. 5 (2006): 343. http://dx.doi.org/10.1071/zo06033.

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The red-tailed phascogale (Phascogale calura) is an endangered dasyurid species that has recently been brought into captivity in an effort to increase numbers before release back into the wild. As part of investigations into the reproductive biology of the species, information on the growth and development of young was collected throughout lactation from litters raised in three separate colonies. Growth curves for aging young throughout lactation and a timetable of developmental changes were constructed. While two colonies, with fourth- and fifth-generation captive animals, showed no significa

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26

Lazenby-Cohen, KA. "Communal Nesting in Antechinus-Stuartii (Marsupialia, Dasyuridae)." Australian Journal of Zoology 39, no. 3 (1991): 273. http://dx.doi.org/10.1071/zo9910273.

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Unrelated Antechinus stuartii spend a high proportion of their time in mixed-sex communal nests. Communal nesting starts early in the year, after females have weaned their young. It appears to be driven by the need for social interactions and familiarity between all the individuals in an area. The mixed communal nests persist into the mating season, when males and females often visit more than one communal nest each day. During the mating season, males spend no more than 8 hours in a communal nest, and travel extensively between communal nests, perhaps in an effort to improve their reproductiv

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27

Geiser, F. "The role of torpor in the life of Australian arid zone mammals." Australian Mammalogy 26, no. 2 (2004): 125. http://dx.doi.org/10.1071/am04125.

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Approximately half of the Australian continent is arid and is characterised by low primary productivity, limited supply of food and pronounced daily fluctuations of ambient temperature (Ta). Despite these adverse conditions the diversity of small mammals in the Australian arid zone is high, although their abundance is generally low. The most successful groups of small arid zone mammals are the dasyurid marsupials, native rodents, and insectivorous bats. A probable reason for the success of the insectivorous dasyurids and bats, which must cope with strong fluctuations in food and water availabi

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28

Woolley, PA. "Observations On The Reproductive Biology Of Myoictis Albopunctatus And Dasyurus Spartacus, Dasyurid Wallacei, Neophascogale Lorentzi, Dasyurus Marsupials Endemic To New Guinea." Australian Mammalogy 23, no. 1 (2001): 63. http://dx.doi.org/10.1071/am01063.

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FIELD and laboratory observations on the reproductive biology of seven species of dasyurid marsupials endemic to New Guinea (viz. ?Antechinus? habbema, ?Antechinus? melanurus, ?Antechinus? naso, Murexia longicaudata, Murexia rothschildi, Myoictis melas and Phascolosorex dorsalis) have been recorded by Woolley (in press). Here, less detailed observations on another four, previously unstudied, species (Myoictis wallacei, Neophascogale lorentzi, Dasyurus albopunctatus and Dasyurus spartacus) are presented to provide information on some aspects of reproduction in each species. Only a small number

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29

Millis, A. L., D. A. Taggart, A. J. Bradley, J. Phelan, and P. D. Temple-Smith. "Reproductive biology of the brush-tailed phascogale,Phascogale tapoatafa(Marsupialia: Dasyuridae)." Journal of Zoology 248, no. 3 (July 1999): 325–35. http://dx.doi.org/10.1111/j.1469-7998.1999.tb01032.x.

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30

McAllan, B. M., T. O'Shea, and J. R. Roberts. "Seasonal changes in the reproductive anatomy of maleAntechinus stuartii (Marsupialia: Dasyuridae)." Journal of Morphology 231, no. 3 (March 1997): 261–75. http://dx.doi.org/10.1002/(sici)1097-4687(199703)231:3<261::aid-jmor5>3.0.co;2-e.

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31

Woolley, P. A., and C. Elliott. "Breeding in wild populations of a small dasyurid marsupial, Planigale ingrami, in north-western Queensland using a novel method for collection of specimens." Australian Mammalogy 36, no. 1 (2014): 81. http://dx.doi.org/10.1071/am13027.

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The reproductive biology of the long-tailed planigale (Planigale ingrami) is less well known than that of its congeners P. gilesi and P. tenuirostris. Aspects of the anatomy of reproductive structures and the pattern of reproduction of P. ingrami were established by examination of specimens extracted from the stomachs of feral cats shot in north-western Queensland. This species has an extended breeding season that commences in August and probably ends in December, and both males and females may live to breed in more than one season, providing support for the similarity of the reproductive stra

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32

Cockburn, A. "The Duration of Lactation in Antechinus-Stuartii (Marsupialia, Dasyuridae)." Australian Journal of Zoology 40, no. 2 (1992): 195. http://dx.doi.org/10.1071/zo9920195.

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Free-living Antechinus stuartii at the Monga State Forest showed almost no variation in date of birth, yet weaning took place over a period of three weeks. Males were weaned slightly earlier and at greater weights than females. When daughters were considered, weaning was delayed in years when breeding density was high, and females with ten teats weaned their young later and at slightly lower weights than females with eight teats. The difference between the two teat phenotypes was not simply associated with increased reproductive investment, as successful eight-teated mothers weaned their young

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33

Woolley, P. A., and C. H. Tyndale-Biscoe. "Side-tracked: unique evidence for passage of foetuses through the lateral vaginal canals in a dasyurid marsupial, Sminthopsis douglasi." Australian Mammalogy 39, no. 1 (2017): 115. http://dx.doi.org/10.1071/am16025.

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34

Gilfillan, Sandra L. "An ecological study of a population of Pseudantechinus macdonnellensis (Marsupialia : Dasyuridae) in central Australia. II. Population dynamics and movements." Wildlife Research 28, no. 5 (2001): 481. http://dx.doi.org/10.1071/wr99063.

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Population dynamics and movements were investigated in a population of Pseudantechinus macdonnellensis, a dasyurid marsupial occupying rocky habitats in the Australian arid zone. Intra-annual cycling in abundance, activity and numbers of resident and transient individuals was not regular from year to year, although the number of residents was high compared with the number of transients. Juvenile recruitment varied between years and was as low as 18%. Densities were low (0.05–0.2 ha–1 for females and 0.05–0.3 ha–1 for males), and individuals exhibited large stable long-term ranges – mean Minimu

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35

Jones, Menna, and Chris Dickman. "Introduction: Carnivorous marsupials." Wildlife Research 28, no. 5 (2001): I. http://dx.doi.org/10.1071/wrv28n5_in.

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Population dynamics and movements were investigated in a population of Pseudantechinus macdonnellensis, a dasyurid marsupial occupying rocky habitats in the Australian arid zone. Intra-annual cycling in abundance, activity and numbers of resident and transient individuals was not regular from year to year, although the number of residents was high compared with the number of transients. Juvenile recruitment varied between years and was as low as 18%. Densities were low (0.05–0.2 ha–1 for females and 0.05–0.3 ha–1 for males), and individuals exhibited large stable long-term ranges – mean Minimu

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36

Renfree, MB, and AM Lewis. "Cleavage in vivo and in vitro in the Marsupial Macropus eugenii." Reproduction, Fertility and Development 8, no. 4 (1996): 725. http://dx.doi.org/10.1071/rd9960725.

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In the tammar wallaby, transport down the oviduct takes less than 24 h after fertilization and a mucoid coat is deposited within a few hours of fertilization, with excess spermatozoa trapped in the mucoid layer. The mucin coat thickens as the zygote passes down the oviduct. A proteinaceous shell is laid down outside the mucin coat in the utero-tubal region of the tract. The fertilized zygote enters the uterus in the pronuclear stage with cleavage proceeding in the uterus. In vivo, the first cleavage takes place two days post coitum (p.c.) (approximately 24 h after ovulation) but the next three

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37

Bennett, JH, WG Breed, DL Hayman, and RM Hope. "Reproductive and Genetic-Studies With a Laboratory Colony of the Dasyurid Marsupial Sminthopsis-Crassicaudata." Australian Journal of Zoology 37, no. 3 (1989): 207. http://dx.doi.org/10.1071/zo9890207.

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The fat-tailed dunnart, Sminthopsis crassicaudata, is a small insectivorous dasyurid (adult weight about 16 g) widely distributed in Australia. A laboratory colony of this marsupial, which has been built up over many years, is providing material for studies of dasyurid reproductive biology and genetics. In the area of reproductive biology, we have found a marked disparity in the age of maturation between the two sexes, and we are currently studying certain aspects of spermatogenesis, sperm transport, fertilisation and early embryonic development. Genetical studies have revealed large differenc

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Collett, Rachael A., Andrew M. Baker, and Diana O. Fisher. "Prey productivity and predictability drive different axes of life-history variation in carnivorous marsupials." Proceedings of the Royal Society B: Biological Sciences 285, no. 1890 (October 31, 2018): 20181291. http://dx.doi.org/10.1098/rspb.2018.1291.

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Variation in life-history strategies has usually been characterized as a single fast–slow continuum of life-history variation, in which mean lifespan increases with age at maturity as reproductive output at each breeding event declines. Analyses of plants and animals suggest that strategies of reproductive timing can vary on an independent axis, with iteroparous species at one extreme and semelparous species at the other. Insectivorous marsupials in the Family Dasyuridae have an unusually wide range of life-history strategies on both purported axes. We test and confirm that reproductive output

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Czarny, N. A., and J. C. Rodger. "143. THE FIRST EVIDENCE OF HIGH SUSCEPTIBILITY TO COLD SHOCK BY THE SPERMATOZOA OF A MARSUPIAL, THE FAT TAILED DUNNART (SMINTHOPSIS CRASSICAUDATA)." Reproduction, Fertility and Development 21, no. 9 (2009): 61. http://dx.doi.org/10.1071/srb09abs143.

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Carnivorous marsupials are native Australian predators including the highly threatened northern quoll (Dasyurus hallucatus) and Tasmanian devil (Sarcophilus harrisii). These species are currently actively managed in captive populations but assisted reproductive techniques such as gamete banking may also contribute to their conservation. Previous studies on a model dasyurid, the fat tailed dunnart (Sminthopsis crassicaudata), have found that spermatozoa do not survive freezing and thawing using a variety of freezing protocols and cryoprotectants. We have re-examined cold shock to investigate pr

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Woolley, P. A., N. Guedelha, and J. A. M. Graves. "Anatomy and chromosomes of two intersexual dasyurid marsupials." Reproduction, Fertility and Development 15, no. 5 (2003): 293. http://dx.doi.org/10.1071/rd03045.

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The intersexual phenotypes of marsupials with XXY and XO chromosome constitutions imply that not all sexual dimorphisms are under the control of testicular hormones and, ultimately, the SRY gene on the Y chromosome. It has been hypothesised that there is a gene on the X chromosome that determines whether either a scrotum will form (one copy of the gene) or a pouch with teats (two copies of the gene). Here, we describe the anatomy and chromosomes of two intersexual dasyurid marsupials. One, a Dasyuroides byrnei, had a pouch, but the reproductive tract was essentially male. The other, a Sminthop

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McAllan, B. M. "Dasyurid marsupials as models for the physiology of ageing in humans." Australian Journal of Zoology 54, no. 3 (2006): 159. http://dx.doi.org/10.1071/zo05073.

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Marsupials of the order Dasyuromorphia have features that make them useful as models for ageing processes in humans. First, they are long-lived for their size, with most small species living for at least 1 year, often several years, contrasting with the mouse, a conventional model for ageing studies, where most populations turn over within 4–6 months. Longevity in some dasyurids allows biological comparisons with other long-lived mammals. Second, the predictable reproduction and life histories of the genera Antechinus and Sminthopsis allow analysis of the role of sex hormones in physiological

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Russell, Tracey, Amanda Lane, Judy Clarke, Carolyn Hogg, Katrina Morris, Tamara Keeley, Thomas Madsen, and Beata Ujvari. "Multiple paternity and precocial breeding in wild Tasmanian devils, Sarcophilus harrisii (Marsupialia: Dasyuridae)." Biological Journal of the Linnean Society 128, no. 1 (May 27, 2019): 201–10. http://dx.doi.org/10.1093/biolinnean/blz072.

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Abstract Polyandry, a common reproductive strategy in various animal species, has potential female benefits, which include enhanced offspring fitness. Benefits can be direct, such as reduced risk of male infanticide of offspring, or indirect, such as increased genetic diversity of offspring and the acquisition of ‘good genes’. Multiple paternity of litters has been recorded in numerous marsupial species but has not been reported in Tasmanian devils, Sarcophilus harrisii (Boitard). We investigated whether multiple paternity occurred in litters within a wild population of Tasmanian devils. Using

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Leung, Luke K. P. "Ecology of Australian tropical rainforest mammals. I. The Cape York antechinus, Antechinus leo (Dasyuridae : Marsupialia)." Wildlife Research 26, no. 3 (1999): 287. http://dx.doi.org/10.1071/wr96042.

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This is the first detailed ecological study of the Cape York antechinus, Antechinus leo, a small marsupial endemic to rainforest on the Cape York Peninsula, North Queensland, Australia. A total of 181 animals was captured 725 times at Iron Range during a capture–mark–recapture study from 1989 to 1991. A. leo is crepuscular–nocturnal, insectivorous, semi-arboreal and nests in hollows. Its life-history strategy is typical of the genus, including the synchrony of reproductive events and the post-mating death of all males. The estimated annual mating season is from mid-September to mid-October. Yo

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Hughes, R. Leon. "Structure of the female reproductive tract of an adult parous Tasmanian tiger, Thylacinus cynocephalus." Australian Journal of Zoology 48, no. 5 (2000): 487. http://dx.doi.org/10.1071/zo00022.

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The present observations on the now-extinct Thylacinus are based on the reproductive system of an adult thylacine discovered among the specimens of the Hill collection at the Hubrecht Laboratory in the Netherlands. As in other marsupials, the reproductive tract was characterised by the presence of a uterus duplex and a vaginal complex where the ureters passed dorsally over each lateral vaginal canal to enter the bladder. The lateral vaginal canals each entered a urogenital sinus that terminated in a shallow cloaca. The gross dimensions of the reproductive tract of the thylacine were greater th

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45

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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Taggart, D. A., and P. D. Temple-Smith. "Transport and storage of spermatozoa in the female reproductive tract of the brown marsupial mouse, Antechinus stuartii (Dasyuridae)." Reproduction 93, no. 1 (September 1, 1991): 97–110. http://dx.doi.org/10.1530/jrf.0.0930097.

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Breed, W. G., C. M. Leigh, and J. H. Bennett. "Sperm morphology and storage in the female reproductive tract of the fat-tailed dunnart,Sminthopsis crassicaudata (Marsupialia: Dasyuridae)." Gamete Research 23, no. 1 (May 1989): 61–75. http://dx.doi.org/10.1002/mrd.1120230107.

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KRAJEWSKI, CAREY, PATRICIA A. WOOLLEY, and MICHAEL WESTERMAN. "The evolution of reproductive strategies in dasyurid marsupials: implications of molecular phylogeny." Biological Journal of the Linnean Society 71, no. 3 (November 2000): 417–35. http://dx.doi.org/10.1111/j.1095-8312.2000.tb01267.x.

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Stead-Richardson, E. J., S. D. Bradshaw, F. J. Bradshaw, and G. Gaikhorst. "Monitoring the oestrous cycle of the chuditch (Dasyurus geoffroii) (Marsupialia : Dasyuridae): non-invasive analysis of faecal oestradiol-17b." Australian Journal of Zoology 49, no. 2 (2001): 183. http://dx.doi.org/10.1071/zo00024.

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Faecal oestradiol-17β levels were monitored for three months during the breeding period in six female chuditch (Dasyurus geoffroii) held in a captive colony. Four of the females mated and gave birth to young. One female mated once but did not conceive and the other female did not mate. Peaks in oestradiol concentration, up to 9 ng g–1 of dried faecal mass, were observed during the period when urogenital swabs were dominated by cornified epithelial cells. Multiple peaks of oestradiol were also observed in the female that did not mate, suggesting that the chuditch may be a reflex ovulator. Monit

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Gilfillan, Sandra L. "An ecological study of a population of Pseudantechinus macdonnellensis (Marsupialia : Dasyuridae) in central Australia. I. Invertebrate food supply, diet and reproductive strategy." Wildlife Research 28, no. 5 (2001): 469. http://dx.doi.org/10.1071/wr99062.

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The invertebrate food supply, diet and reproductive strategy of a population of the dasyurid marsupial, Pseudantechinus macdonnellensis, living in an arid rocky habitat was investigated at a site in the West MacDonnell National Park, Northern Territory, over two and a half years. Invertebrate food supply displayed high month to month predictability and no marked seasonal cycle correlated with temperature. Analysis of faeces indicated that P. macdonnellensis is a generalist insectivore. There was some discrepancy between the pattern revealed by invertebrate sampling and the prey types taken but

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