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Journal articles on the topic 'Marsupialia Reproduction'

Author: Grafiati

Published: 4 June 2021

Last updated: 30 January 2023

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1

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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2

Nelson, JE, and A. Goldstone. "Reproduction in Peradorcas-Concinna (Marsupialia, Macropodidae)." Wildlife Research 13, no. 4 (1986): 501. http://dx.doi.org/10.1071/wr9860501.

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The length of the oestrous cycle in captive Peradorcas concinna was 33.73 � 1.65 days (n = 52). Females which were dominant over other females or were alone with their young had a cycle length of about 32 days and subordinate females had a cycle length of about 35 days. Some observations on the growth of the young are presented. Weaning is very abrupt; final pouch exit occurs about 2 weeks after the first pouch exit, and is caused by the female's aggressiveness towards its young.

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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

Hogan, Lindsay A., Tina Janssen, and Stephen D. Johnston. "Wombat reproduction (Marsupialia; Vombatidae): an update and future directions for the development of artificial breeding technology." REPRODUCTION 145, no. 6 (June 2013): R157—R173. http://dx.doi.org/10.1530/rep-13-0012.

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This review provides an update on what is currently known about wombat reproductive biology and reports on attempts made to manipulate and/or enhance wombat reproduction as part of the development of artificial reproductive technology (ART) in this taxon. Over the last decade, the logistical difficulties associated with monitoring a nocturnal and semi-fossorial species have largely been overcome, enabling new features of wombat physiology and behaviour to be elucidated. Despite this progress, captive propagation rates are still poor and there are areas of wombat reproductive biology that still

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6

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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7

WARD, S. J., and M. B. RENFREE. "Reproduction in females of the feathertail gliderAcrobates pygmaeus(Marsupialia)." Journal of Zoology 216, no. 2 (October 1988): 225–39. http://dx.doi.org/10.1111/j.1469-7998.1988.tb02427.x.

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8

WARD, S. J., and M. B. RENFREE. "Reproduction in males of the feathertail gliderAcrobates pygmaeus(Marsupialia)." Journal of Zoology 216, no. 2 (October 1988): 241–51. http://dx.doi.org/10.1111/j.1469-7998.1988.tb02428.x.

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9

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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10

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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11

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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12

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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13

Kerle, JA, and CJ Howe. "The Breeding Biology of a Tropical Possum, Trichosurus-Vulpecula-Arnhemensis (Phalangeridae, Marsupialia)." Australian Journal of Zoology 40, no. 6 (1992): 653. http://dx.doi.org/10.1071/zo9920653.

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The breeding biology of Trichosurus vulpecula has been studied in some detail for temperate populations but not for the northern brushtail possum (T. v. arnhemensis), the tropical form of this species. Data for the distribution of births and sex ratio of the young, growth and development of the young and reproductive cycles of both males and females were obtained. Most data were collected from a captive breeding colony of northern brushtails and supplemented with data from wild populations. The reproduction, growth and development of T. v. arnhemensis are very similar to those already describe

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14

Ward, SJ. "Reproduction in the Western Pygmy-Possum, Cercartetus-Concinnus (Marsupialia, Burramyidae), With Notes on Reproduction of Some Other Small Possum Species." Australian Journal of Zoology 38, no. 4 (1990): 423. http://dx.doi.org/10.1071/zo9900423.

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The patterns of breeding and reproduction in Cercartetus concinnus were investigated through the histology of specimens in Australian museums, field observations in north-western Victoria, and published accounts. Histology of the reproductive tracts of museum specimens of female C. nanus, C. lepidus, Acrobates pygmaeus and Distoechurus pennatus was also undertaken to elaborate on reproduction in these species. Young of C. concinnus are born in most months, and some reproductively active males are probably present at all times of the year. Embryonic diapause occurs during the unilaminar blastoc

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15

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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16

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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17

Cummins, J. M., P. D. Temple-Smith, and M. B. Renfree. "Reproduction in the male honey possum (Tarsipes rostratus: Marsupialia): The epididymis." American Journal of Anatomy 177, no. 3 (November 1986): 385–401. http://dx.doi.org/10.1002/aja.1001770308.

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18

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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19

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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20

Johnson, P. M. "Reproduction in the Bridled Nailtail Wallaby, Onychogalea fraenata Gould (Marsupialia : Macropodidae), in Captivity." Wildlife Research 24, no. 4 (1997): 411. http://dx.doi.org/10.1071/wr96028.

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The reproduction of the endangered macropod Onychogalea fraenata was studied in captivity. O. fraenata breeds throughout the year. A post-partum oestrus was not recorded, although mating during the pouch life was observed when the pouch young were 80–92 days old. The mean length of the oestrous cycle was determined to be 36·2 days, while the mean length of a gestation period was 23·6 days. Pouch life ranged between 119 and 126 days, and the young males and females matured as early as 270 days and 136 days, respectively.

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21

Johnson, PM. "Reproduction of the spectacled hare-wallaby, Lagorchestes conspicillatus Gould (Marsupialia: Macropodidae), in captivity, with age estimation of the pouch young." Wildlife Research 20, no. 1 (1993): 97. http://dx.doi.org/10.1071/wr9930097.

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Lagorchestes conspicillatus has a widespread distribution across northern Australia. Observations were made on reproduction in captive animals and a key produced for age determination of pouch young. Females commence breeding at about one year of age and males when slightly older. Reproduction in this species involved an oestrous cycle of 30 days, a gestation period of 29-31 days and a mean pouch life of 152 days. A postpartum oestrus and mating following a birth was the normal pattern of reproduction.

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22

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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23

Renfree, Marilyn B. "Society for Reproductive Biology Founders' Lecture 2006 Life in the pouch: womb with a view." Reproduction, Fertility and Development 18, no. 7 (2006): 721. http://dx.doi.org/10.1071/rd06072.

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Marsupials give birth to an undeveloped altricial young after a relatively short gestation period, but have a long and sophisticated lactation with the young usually developing in a pouch. Their viviparous mode of reproduction trades placentation for lactation, exchanging the umbilical cord for the teat. The special adaptations that marsupials have developed provide us with unique insights into the evolution of all mammalian reproduction. Marsupials hold many mammalian reproductive ‘records’, for example they have the shortest known gestation but the longest embryonic diapause, the smallest ne

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24

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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25

Martins, Eduardo Guimarães, Vinícius Bonato, Cibele Queiroz da-Silva, and Sérgio Furtado dos Reis. "Seasonality in reproduction, age structure and density of the gracile mouse opossum Gracilinanus microtarsus (Marsupialia: Didelphidae) in a Brazilian cerrado." Journal of Tropical Ecology 22, no. 4 (July 2006): 461–68. http://dx.doi.org/10.1017/s0266467406003269.

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The temporal pattern of reproduction and its consequences for age structure and density were investigated in a population of the gracile mouse opossum Gracilinanus microtarsus in south-eastern Brazil. Individuals of G. microtarsus were monitored through capture–mark–recapture methods from August 2000 to February 2003 in a remnant of cerradão, a forest-like physiognomy of the highly seasonal cerrado biome. The temporal pattern of reproduction of the population studied was highly seasonal with rearing of the offspring occurring in the first half of the warm-wet season, when the abundance of food

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26

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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27

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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28

Johnson, PM, and K. Vernes. "Reproduction in the red-legged pademelon, Thylogale stigmatica Gould (Marsupialia : Macropodidae), and age estimation and development of pouch young." Wildlife Research 21, no. 5 (1994): 553. http://dx.doi.org/10.1071/wr9940553.

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The reproduction of Thylogale stigmatica in captivity was studied and a predictive growth equation for age determination of the pouch young was developed. The general pattern of reproduction involved an oestrous cycle of 29-32 days, a gestation period of 28-30 days and a mean pouch life of 184 days. A post-partum oestrus and mating generally followed birth. Births were observed in all months in captivity, and from October to June in the wild. Mean age of weaning of young was 66 days following permanent pouch emergence, and the mean ages at maturity for females and males was 341 and 466 days, r

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29

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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30

Sunnucks, Paul, and Andrea C. Taylor. "Sex of Pouch Young Related to Maternal Weight in Macropus eugenii and M. parma (Marsupialia: Macropodidae)." Australian Journal of Zoology 45, no. 6 (1997): 573. http://dx.doi.org/10.1071/zo97038.

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Competing theories of sex allocation in mammals may best be reconciled in the light of data from diverse species. The tammar wallaby (Macropus eugenii) is potentially a particularly interesting study animal because females wean only one young per year, and exhibit extreme synchronicity in the annual onset of breeding. By contrast, reproduction in the closely related parma wallaby (M. parma) is almost asynchronous. These two Australian species are found sympatrically only on Kawau Island, New Zealand, where they were introduced in about 1870. We sampled wallabies on Kawau Island in April of 199

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31

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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32

Geiser, Fritz. "Daily torpor and thermoregulation in antechinus (Marsupialia): influence of body mass, season, development, reproduction, and sex." Oecologia 77, no. 3 (1988): 395–99. http://dx.doi.org/10.1007/bf00378050.

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33

Smith, Meredith J. "Establishment of a captive colony of Bettongia tropica (Marsupialia: Potoroidae) by cross-fostering; and observations on reproduction." Journal of Zoology 244, no. 1 (January 1998): 43–50. http://dx.doi.org/10.1111/j.1469-7998.1998.tb00005.x.

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34

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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35

Craig, SA. "Social Organization, Reproduction and Feeding Behaviour of a Population of Yellow-Bellied Gliders, Petaurus Australis (Marsupialia: Petauridae)." Wildlife Research 12, no. 1 (1985): 1. http://dx.doi.org/10.1071/wr9850001.

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Population dynamics, habitat use and feeding behaviour in a small population of P. australis were studied in 190 ha of Tall Open Forest in the Victorian Central Highlands. Between October 1979 and December 1982, 13 marked individuals were trapped on 71 occasions during 1223 trap-nights. Gliders formed relatively stable family groups, each comprising a single resident pair living in a monogamous relationship with or without dependent offspring. They bred between August and October. Four females were observed with a single pouch young. Each pair occupied substantially separate ranges of between

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36

Lundie-Jenkins, G. "Reproduction and growth to sexual maturity in the rufous hare-wallaby, Lagorchestes hirsutus Gould (Marsupialia: Macropodidae) in captivity." Australian Mammalogy 16, no. 1 (1993): 45. http://dx.doi.org/10.1071/am93009.

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37

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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38

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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39

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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40

Johnson, P. M. "Reproduction of the whiptail wallaby, Macropus parryi Bennett (Marsupialia : Macropodidae), in captivity with age estimation of the pouch-young." Wildlife Research 25, no. 6 (1998): 635. http://dx.doi.org/10.1071/wr97128.

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Reproduction of the whiptail wallaby, Macropus parryi, was studied in captivity. The mean length of the oestrous cycle was 41.8 days while the mean length of the gestation period was 38.0 days. M. parryi bred throughout the year and post-partum oestrus was not recorded although mating did occur during the pouch life when the pouch-young was 118–168 days of age. The length of the pouch-life was 256–267 days and weaning occurred 104–215 days after emergence from the pouch. Sexual maturity for females occurred at 509–647 days of age. An age-determination table was produced and found useful for pr

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41

McKenzie, LM, and DW Cooper. "Low MHC class II variability in a marsupial." Reproduction, Fertility and Development 6, no. 6 (1994): 721. http://dx.doi.org/10.1071/rd9940721.

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The major histocompatibility complex (MHC) loci have been shown to be highly polymorphic in most eutherian ('placental') species studied. Several hypotheses have been advanced for the maintenance of this exceptional level of genetic variation, one of which suggests that it is necessary for successful eutherian reproduction. Marsupials (metatherians) and eutherians are the only two groups of viviparous mammals, but their modes of reproduction are quite distinct. Although marsupials have placentae, they are generally shorter lived and less invasive than in eutherians. Other investigations have s

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42

Cockburn, A. "Sex-Ratio Variation in Marsupials." Australian Journal of Zoology 37, no. 3 (1989): 467. http://dx.doi.org/10.1071/zo9890467.

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Many marsupials produce sex ratios biased towards male or female young. In several cases these changes are comfortably accommodated in the existing theory of sex allocation. Local resource competition and the Trivers-Willard hypothesis have been usefully applied to several data sets, and preliminary experimental work has supported the main tenets of theory. By contrast, several data sets lack explanation, and provide challenges to theoreticians. The high frequency of bias in marsupials does not result from data-dredging, as bias is usually reported in descriptive accounts of marsupial reproduc

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Edwards, Melanie J., and Janine E. Deakin. "The marsupial pouch: implications for reproductive success and mammalian evolution." Australian Journal of Zoology 61, no. 1 (2013): 41. http://dx.doi.org/10.1071/zo12088.

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Extant mammals are divided into sub- and infraclasses that are distinguished by their mode of reproduction. The monotremes lay eggs, the marsupials give birth to altricial young that typically develop in a pouch, and the eutherians have prolonged in utero development, resulting in well developed young at birth. The three groups exhibit what appears to be a nice progression of evolution towards the well developed newborn young of eutherian mammals. However, marsupials do not represent a step in the progression of producing well developed young, but maintain a reproductive strategy that has evol

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Tyndale-Biscoe, CH, and LA Hinds. "Influence of the immature testis on sexual differentiation in the tammar wallaby, Macropus eugenii (Macropodidae: Marsupialia)." Reproduction, Fertility and Development 1, no. 3 (1989): 243. http://dx.doi.org/10.1071/rd9890243.

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Reproduction in the tammar wallaby, Macropus eugenii (Desmarest), is highly seasonal in the females but not the males. This study was designed to determine whether the difference is established during early life as a result of exposure to the developing testes. At day 10 after birth, when the sex can be distinguished externally, testes were removed from males and placed under the flank skin of females, while other groups of males and females were subjected to surgery without interfering with the gonads. The testis grafts remained palpable for 3-6 months. Sex-chromosome constitution was confirm

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45

Johnson, Peter M., and Steven Delean. "Reproduction in the northern bettong, Bettongia tropica Wakefield (Marsupialia: Potoroidae), in captivity, with age estimation and development of pouch young." Wildlife Research 28, no. 1 (2001): 79. http://dx.doi.org/10.1071/wr00007.

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Reproduction in the northern bettong, Bettongia tropica, was studied in captivity. B. tropica is capable of breeding throughout the year, and mating behaviour is similar to that reported for other Bettongia species. The length of the oestrous cycle was 21–23 days, and the period of gestation was 20–23 days. Birth was usually followed by an oestrus and mating, and a subsequent lactation-controlled embryonic diapause. The interval between loss of pouch young and birth was 19–20 days. Permanent emergence from the pouch occurred at 102–112 days, and young at foot were weaned at 166–185 days of age

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46

Johnson, Peter M., and Steven Delean. "Reproduction of Lumholtz's tree-kangaroo, Dendrolagus lumholtzi (Marsupialia : Macropodidae) in captivity, with age estimation and development of the pouch young." Wildlife Research 30, no. 5 (2003): 505. http://dx.doi.org/10.1071/wr02090.

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Reproduction in Lumholtz's tree kangaroo, Dendrolagus lumholtzi, was studied in captivity. The length of the oestrous cycle was 47–64 days and the gestation period was 42–48 days. Post partum oestrus and embryonic diapause were not observed in this study. The interval between loss of a pouch young and a return mating was 22 days. Pouch life was 246–275 days long and weaning occurred 87–240 days later. Sexual maturity was obtained in females as early as 2.04 years and in males at 4.6 years. Linear mixed-effects models are used to describe polynomial growth equations for age determination of pou

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Short, Jeff, J. D. Richards, and Bruce Turner. "Ecology of the western barred bandicoot (Perameles bougainville) (Marsupialia: Peramelidae) on Dorre and Bernier Islands, Western Australia." Wildlife Research 25, no. 6 (1998): 567. http://dx.doi.org/10.1071/wr97131.

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Population structure, reproduction, condition, movements and habitat preference were assessed for western barred bandicoots (Perameles bougainville) on Dorre and Bernier Islands over seven trapping sessions between 1988 and 1995. Data comes from 372 captures of bandicoots in 2535 trap-nights (an average of 14·7 captures per 100 trap-nights). Trap success was 5.7–25.8% on Dorre and 5.7–7.6% on Bernier. Recaptures within a trip made up 29% of bandicoot captures. The overall sex ratio (excluding recaptures) was skewed heavily towards males at 1.7: 1 for trapped animals, but varied between male an

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Cowan, PE. "Changes in milk composition during lactation in the common brushtail possum, Trichosurus vulpecula (Marsupialia: Phalangeridae)." Reproduction, Fertility and Development 1, no. 4 (1989): 325. http://dx.doi.org/10.1071/rd9890325.

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The milk constituents of Trichosurus vulpecula, a folivorous marsupial, showed marked quantitative and qualitative changes during the course of lactation. The milk produced in the early stages of lactation was dilute, with about 9-13% (w/w) solids during the first 3 weeks, comprising mostly carbohydrate and protein (35-40%). At 20 weeks, about three-quarters of the way through lactation, the milk was much more concentrated, about 28% solids, with lipid the predominant fraction (30-35%), after a marked decline in carbohydrate content (20-25%). Concentrations of the electrolytes sodium and potas

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Johnson, Peter M., and J. Steven C. Delean. "Reproduction in the Proserpine rock-wallaby, Petrogale persephone Maynes (Marsupialia : Macropodidae), in captivity, with age estimation and development of pouch young." Wildlife Research 26, no. 5 (1999): 631. http://dx.doi.org/10.1071/wr98049.

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Reproduction in the Proserpine rock-wallaby, Petrogale persephone, was studied in captivity. Sexual maturity, defined as age at first fertility, was attained at 20.5 months in females whereas males were not mature until 24.8 months. P. persephone is capable of breeding throughout the year. The length of the oestrous cycle was 33–38 days, while the period of gestation was 30–34 days. Birth was usually followed by an oestrus and mating, and a subsequent lactation-controlled embryonic diapause. The mean interval between loss of a pouch young and birth was 31.5 days. Pouch life was 203–215 days an

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Renfree, MB. "Monotreme and marsupial reproduction." Reproduction, Fertility and Development 7, no. 5 (1995): 1003. http://dx.doi.org/10.1071/rd9951003.

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Marsupials were regarded as curiosities by their early European discoverers, animals to be wondered at. Monotremes were even more surprising; the platypus was such an amalgam of characters that it was thought to be a hoax. They were recognized very early as mammals that could make a major contribution to our understanding of reproductive processes, and work on marsupials at the turn of the century was much in evidence. It is, however, only in the past two decades, and especially in the past few years that marsupial research has regained this position. There is no doubt that future research wil

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