| some effects of tick infestations on juvenile northern brown bandicoot (isoodon macrourus). | the effect of tick infestations on body weight and various blood parameters was monitored in juvenile northern brown bandicoots (isoodon macrourus) after release into tick-infested or tick-free enclosures. three species of ticks were observed in the enclosures, haemaphysalis humerosa, ixodes tasmani and ixodes holocyclus. bandicoots released into tick-infested enclosures showed a reduced growth rate (1.8 versus 2.5 g/day increase in body weight), a reduced haematocrit value (27.4 versus 40.0%) a ... | 1991 | 2067048 |
| immunocytochemical location of oxytocin and mesotocin within the hypothalamus of two australian marsupials, the bandicoot isoodon macrourus and the brushtail possum trichosurus vulpecula. | the presence of oxytocin and mesotocin in the hypothalamus of two australian marsupials, the bandicoot (isoodon macrourus) and the brushtail possum (trichosurus vulpecula), was examined by immunocytochemistry. tissue was fixed in paraformaldehyde in phosphate buffer and immunoreactive cells were detected using highly specific rabbit antioxytocin and sheep anti-mesotocin as primary antisera. immunoreactive oxytocin cells were demonstrated in the paraventricular and supraoptic nuclei of bandicoot ... | 1989 | 2767413 |
| serotypes of erysipelothrix rhusiopathiae in australian pigs, small ruminants, poultry, and captive wild birds and animals. | serotypes of 93 australian isolates of erysipelothrix rhusiopathiae from diseased domestic animals and poultry and a variety of captive wild birds and animals were determined by double diffusion gel precipitation. two isolates, from the faeces of a swallow were also examined. serotypes 1a, 1b and 2 were isolated from pigs and serotypes 1a, 1b, 2, 5, 15 and 21 from sheep or goats. erysipelas in poultry was attributed to serotypes 1b, 5, 15 and 16. in captive wild birds serotypes 1b, 5, 6, 8, 14, ... | 1988 | 3190592 |
| osteogenesis in two marsupial species, the bandicoot isoodon macrourus and the possum trichosurus vulpecula. | skeletal development of two marsupial species, the bandicoot, isoodon macrourus and the brushtail possum, trichosurus vulpecula, has been examined in whole mount preparations using a technique of clearing and differential staining of cartilage and bone. both marsupials possess a complete cartilaginous skeleton at birth and ossification begins in the maxilla, mandible and certain bones of the forelimb soon after birth. the general pattern of ossification in these marsupials is similar to that in ... | 1988 | 3248963 |
| the ultrastructure of the pituitary and the adrenal gland of three newborn marsupials (dasyurus hallucatus, trichosurus vulpecula and isoodon macrourus). | the ultrastructure of the pituitary glands of the newborn northern native cat, brushtail possum and the northern brown bandicoot and the adrenal glands of the former two marsupials were examined to determine whether these endocrine glands were functional at birth. the anterior pituitary of all three species was well vascularised and many cells contained electron-dense, membrane bound granules. the adrenal glands were composed of two distinct cell populations. one group of cells possessed dark st ... | 1988 | 3364743 |
| ultrastructural identification of merkel cells around the mouth of the newborn marsupial. | the ultrastructure of the epidermal cells surrounding the mouth of three newborn marsupial species, the northern native cat dasyurus hallucatus, the brush tail possum trichosurus vulpecula and the northern brown bandicoot isoodon macrourus were examined. the presence of merkel cells, highly sensitive touch receptors, would suggest that the sense of touch aids the relatively underdeveloped newborn marsupial to move from the urinogenital sinus to the pouch and to locate the teat. | 1988 | 3364744 |
| ultrastructure of the olfactory system of three newborn marsupial species. | the ultrastructure of the olfactory apparatus of three newborn marsupial species, the northern native cat, the brushtail possum, and the northern brown bandicoot, were examined. the olfactory epithelium and olfactory bulbs were at a similar stage of development in all three species. receptor cells with cilia were observed, and although the olfactory system undergoes further differentiation during pouch life and although the olfactory epithelium and bulb of the newborn differs from that of the ad ... | 1988 | 3414987 |
| thyroid development in the marsupial bandicoot, isoodon macrourus. | the postnatal structural development of the thyroid gland of the australian native bandicoot, isoodon macrourus, was monitored and the onset of thyroid function (i.e., the secretion of thyroid hormones) was determined. thyroid glands were obtained from bandicoots at days 1, 3, 11, 12, 13, 21, 25, 30, 34, 35, 39, 46, 48, 50, 59, 61, 75, 79, 83, and 163 of age and from adult animals, and the tissues were examined with the transmission electron microscope. the thyroid gland of the newborn bandicoot ... | 1987 | 3578835 |
| genetic variation and immunochemical properties of l-malate : nad+ oxidoreductase isozymes in the bandicoot, isoodon macrourus. | | 1974 | 4464831 |
| comparative aspects of oxytocin-like hormones in marsupials. | unlike eutherian mammals which secrete only oxytocin (ot), marsupials secrete the typically reptilian mesotocin (mt) and/or ot as their oxytocic peptides. our laboratories have been conducting research on various aspects of the roles of ot-like peptides in three marsupials, the brushtail possum, the northern brown bandicoot and the tammar wallaby. by providing information on the functions of ot-like peptides in these species we hope to provide some clues as to the evolution of neurohypophysial h ... | 1995 | 8714028 |
| in vivo effects of epidermal growth factor on epidermal pattern formation and hair follicle initiation in the marsupial bandicoot isoodon macrourus. | the extrauterine development of marsupial pouch young (northern brown bandicoot isoodon macrourus) has facilitated the study of the effects of murine epidermal growth factor (megf) on pattern formation in skin. hair follicle initiation and development, which in the mouse would occur from about days 13-14 of gestation onward, occurs postnatally. in the present study the effect in vivo of megf on developing skin corresponding to mouse gestational ages from day 13 onward was examined. subcutaneous ... | 1997 | 9418978 |
| vimentin localisation in tooth germ cells of two marsupial species, the northern brown bandicoot, isoodon macrourus, and the brushtail possum, trichosurus vulpecula. | in marsupial teeth, long cellular processes from ameloblasts and odontoblasts are found in the developing enamel and dentinal tubules, respectively. it has been suggested that the odontoblast cytoskeleton plays a role in the dentinal tubule formation of rat. to understand the role of the cytoskeleton in the blast cells, the location of vimentin and cytokeratin in the tooth germ of the bandicoot and the possum was examined using immunohistochemical techniques. vimentin was detected in differentia ... | 1999 | 10361405 |
| redescriptions of the species of physaloptera rudolphi, 1819 (nematoda: spirurida) parasitic in bandicoots (marsupialia: perameloidea) in australia. | the species of physaloptera rudolphi, 1819 (nematoda: spirurida) occurring in bandicoots (families peramelidae and thalacomyidae) in australia were re-examined and re-described. physaloptera peramelis johnston & mawson, 1939 was found in perameles nasuta geoffroy and occasionally in isoodon macrourus (gould) in eastern australia. ph. peragale johnson & mawson, 1940 from macrotis leucura (thomas) from the northern territory is treated as a junior synonym of ph. peramelis. ph. thalacomys johnston ... | 1999 | 10619061 |
| plasma concentrations of thyroxine and growth hormone in the developing marsupial bandicoot, isoodon macrourus. | plasma concentrations of thyroxine (t4) and growth hormone (gh) were measured in the developing bandicoot from 21 through to 69 days post partum. thyroxine concentrations increased from 7 ng ml(-1) at 21 days post partum to reach a maximum of around 40 ng ml(-1) approximately 40 days post partum. after this time, plasma t4 concentrations decreased until about 50 days post partum, when levels were not different from those in the adult (9.2 +/- 0.7 ng ml(-1), n = 10). in contrast, gh concentration ... | 2000 | 11451016 |
| life history and pathogenesis of gallegostrongylus australis (nematoda: angiostrongylidae) in muridae. | gallegostrongylus australis spratt, haycock & walter, 2001 (nematoda: angiostrongylidae) developed in deroceras panormitanum, lehmannia nyctelia, l. flava and milax gigates (gastropoda). the first moult occurred at 18-19 days after infection (dai) and the second moult at 28 dai. larvae were infective to experimental murid definitive hosts at 35 dai. in experimentally infected rattus fuscipes larvae moulted l3-4 at 3 dai and l4-5 at 6-7 dai. patency in r.fuscipes, r. lutreolus, r. norvegicus and ... | 2001 | 11474979 |
| nitrogen requirements and urea recycling in an omnivorous marsupial, the northern brown bandicoot isoodon macrourus. | the maintenance nitrogen (n) requirement of the northern brown bandicoot, isoodon macrourus, was determined by giving captive animals diets based on a commercial small carnivore mix and shredded sweet potato, with 20% sand included in the moist diet to simulate the soil ingested by bandicoots during natural foraging. linear regression of n balance on n intake yielded maintenance n requirements of 438 mg kg(-0.75) d(-1) on a dietary basis and 413 mg kg(-0.75) d(-1) on a truly digestible basis. th ... | 2005 | 15887092 |
| evolution of mammalian cd1: marsupial cd1 is not orthologous to the eutherian isoforms and is a pseudogene in the opossum monodelphis domestica. | cd1 is a member of the major histocompatibility complex (mhc) class i family of proteins that present lipid antigens to t cells and natural killer (nk) t cells; it is found in both eutherian mammals and birds. in eutherians, duplication of the cd1 gene has resulted in multiple isoforms. a marsupial cd1 homologue was identified in a set of expressed sequence tags from the thymus of the bandicoot isoodon macrourus. southern blot and genomic sequence analyses revealed that cd1 is a single copy gene ... | 2007 | 17244156 |
| analysis of a set of australian northern brown bandicoot expressed sequence tags with comparison to the genome sequence of the south american grey short tailed opossum. | expressed sequence tags (ests) have been used for rapid gene discovery in a variety of organisms and provide a valuable resource for whole genome annotation. although the genome of one marsupial, the opossum monodelphis domestica, has now been sequenced, no est datasets have been reported from any marsupial species. in this study we describe an est dataset from the bandicoot, isoodon macrourus, providing information on the transcriptional profile of the bandicoot thymus and the opportunity for a ... | 2007 | 17298671 |
| serological evidence of coxiella burnetii exposure in native marsupials and introduced animals in queensland, australia. | summarythe state of queensland has the highest incidence of q fever in australia. in recent years, there has been an increase in human cases where no contacts with the typical reservoir animals or occupations were reported. the aim of this study was to determine the seroprevalence of coxiella burnetii in australian native animals and introduced animals in northern and southeastern queensland. australian native marsupials sampled included the brushtail possum (trichosurus vulpecula) and common no ... | 2011 | 21892986 |
| lung development in the marsupial bandicoot, isoodon macrourus. | the transformation of the terminal sacs present in the newborn into the alveoli observed in the adult, and the tissue and cellular composition of the interalveolar septum at various stages of lung development, were examined in the developing bandicoot. lungs from 22 bandicoots, aged from 1 day postpartum to adult, were fixed with a glutaraldehyde/formaldehyde fixative and processed for examination of their structure. the respiratory region of the newborn lung is formed from terminating sacs, app ... | 2012 | 3693087 |
| the persistence of the corpus luteum of pregnancy into lactation in the marsupial bandicoot, isoodon macrourus. | the bandicoot is unique among marsupials in possessing a corpus luteum of pregnancy which continues to secrete progesterone during lactation. different factors which may influence the activity of this corpus luteum were examined. there was no correlation between the number of pouch young and the plasma progesterone concentration. similarly, bromocriptine did not appear to cause a dramatic decrease in plasma progesterone early in lactation, however, it may induce premature regression of the corpu ... | 2009 | 2792722 |
| mesotocin and oxytocin in the brain and plasma of an australian marsupial, the northern brown bandicoot, isoodon macrourus. | 1. mesotocin (mt) and oxytocin (ot) were measured in the brain and plasma of bandicoots using reverse phase high performance liquid chromatography and specific radioimmunoassays. 2. mt and ot were found in the pituitary (1.25 +/- 0.10 micrograms/mt; 0.725 +/- 0.077 micrograms/ot) and hypothalamus (38.37 +/- 6.46 ng/mt; 19.1 +/- 4.61 ng/ot). smaller amounts were present in the cerebral cortex. 3. basal plasma concentrations ranged from 1.5 to 8.1 pg/ml for both peptides (n = 14) and were elevated ... | 2005 | 1351823 |
| diet of dingoes and other wild dogs in peri-urban areas of north-eastern australia. | knowledge of the resource requirements of urban predators can improve our understanding of their ecology and assist town planners and wildlife management agencies in developing management approaches that alleviate human-wildlife conflicts. here we examine food and dietary items identified in scats of dingoes in peri-urban areas of north-eastern australia to better understand their resource requirements and the potential for dingoes to threaten locally fragmented populations of native fauna. our ... | 2016 | 26964762 |
| prevalence, genetic diversity and potential clinical impact of blood-borne and enteric protozoan parasites in native mammals from northern australia. | a molecular survey was conducted to provide baseline information on the prevalence, genetic diversity and potential clinical impacts of blood-borne and enteric protozoans in native wild mammals from the northern territory (nt). a total of 209 blood and 167 faecal samples were collected from four target species; the northern brown bandicoot (isoodon macrourus), common brushtail possum (trichosurus vulpecula), northern quoll (dasyurus hallucatus) and brush-tailed rabbit-rat (conilurus penicillatus ... | 2017 | 28408215 |
| mitochondrial genomes of a bandicoot and a brushtail possum confirm the monophyly of australidelphian marsupials. | recent molecular analyses suggest that the position of bandicoots is the major difficulty in determining the root of the tree of extant marsupials. to resolve this, we analyse mitochondrial genome sequences of a bandicoot (isoodon macrourus) and a brushtail possum (trichosurus vulpecula) together with the previously available marsupial mitochondrial genomes, the virginia opossum (didelphis virginiana) and the wallaroo (macropus robustus). analyses of mitochondrial protein-coding and rna genes st ... | 2001 | 11454299 |
| dual duplication of neurohypophysial hormones in an australian marsupial: mesotocin, oxytocin, lysine vasopressin and arginine vasopressin in a single gland of the northern bandicoot (isoodon macrourus). | neurohypophysial hormones of an australian marsupial, the northern bandicoot (isoodon macrourus), have been identified by their retention times in high-pressure reverse-phase liquid chromatography using two solvent systems and by their molar pressor or uterotonic activities. two pressor peptides, arginine vasopressin and lysipressin, and two uterotonic peptides, mesotocin and oxytocin, have been characterized. because mesotocin and arginine vasopressin have been identified in three other austral ... | 1988 | 3395337 |
| the sensory innervation of the nasal glabrous skin in the short-nosed bandicoot (isoodon macrourus) and the opossum (didelphis virginiana). | the glabrous skin at the anterior end of the snout of the short-nosed bandicoot and the american opossum was investigated by electron microscopy. in both species of animals, this region was lined by skin with broad epidermal pegs, innervated by three types of intraepidermal nerves. these were intraepidermal nerves which penetrated the epidermis up to the level of the stratum spinosum or the stratum granulosum, intraepidermal nerves in the basal layer of the epidermis partially surrounded by schw ... | 1985 | 3870723 |
| breinlia mackerrasae n.sp. (nematoda: filarioidea) from the peramelid marsupial, isoodon macrourus, with a note on breinlia sp. from the 'mumut' (peramelidae). | | 1974 | 4825433 |
| prey use by dingoes in a contested landscape: ecosystem service provider or biodiversity threat? | in australia, dingoes (canis lupus dingo) have been implicated in the decline and extinction of a number of vertebrate species. the lowland wet tropics of queensland, australia is a biologically rich area with many species of rainforest-restricted vertebrates that could be threatened by dingoes; however, the ecological impacts of dingoes in this region are poorly understood. we determined the potential threat posed by dingoes to native vertebrates in the lowland wet tropics using dingo scat/stom ... | 2017 | 29152188 |
| post-weaning cranial ontogeny in two bandicoots (mammalia, peramelomorphia, peramelidae) and comparison with carnivorous marsupials. | the ontogeny of the skull has been studied in several marsupial groups such as didelphids, microbiotheriids, and dasyurids. here, we describe and compare the post-weaning ontogeny of the skull in two species of bandicoots, echymipera kalubu (echymiperinae) and isoodon macrourus (peramelinae), analyzing specific allometric trends in both groups, describing common (and specific) patterns, and discussing them on functional and phylogenetic grounds. growth patterns were analyzed both qualitatively a ... | 2013 | 24210769 |
| metastatic squamous cell carcinoma in a northern brown bandicoot (isoodon macrourus). | aside from a handful of notable exceptions, neoplasia is not reported as a major cause of mortality in wild animal populations and often goes undetected. for northern brown bandicoots specifically, there are few reported tumors in the literature and on file in the australian registry of wildlife health. this report describes a case of squamous cell carcinoma in a northern brown bandicoot (isoodon macrourus), with metastases to the draining lymph nodes and lung. this neoplasm consisted predominan ... | 2017 | 29056669 |
| immunome database for marsupials and monotremes. | to understand the evolutionary origins of our own immune system, we need to characterise the immune system of our distant relatives, the marsupials and monotremes. the recent sequencing of the genomes of two marsupials (opossum and tammar wallaby) and a monotreme (platypus) provides an opportunity to characterise the immune gene repertoires of these model organisms. this was required as many genes involved in immunity evolve rapidly and fail to be detected by automated gene annotation pipelines. | 2011 | 21854560 |
| cloning and sequence analysis of pituitary prolactin cdna from the northern brown bandicoot (isoodon macrourus). | the nucleotide sequence for pituitary prolactin cdna from the marsupial bandicoot (isoodon macrourus) was determined by reverse transcription-polymerase chain reaction and 5'/3' rapid amplification of cdna ends. the deduced amino acid sequence showed high sequence identity with brushtail possum prolactin (95%) and all of the expected structural features of a quadruped prolactin. a prolactin gene tree was constructed and rates of evolution calculated for bandicoot, possum, opossum and several mam ... | 2006 | 16406378 |
| divergent t-cell receptor delta chains from marsupials. | complementary dnas (cdnas) encoding t-cell receptor delta (trd) chains from the northern brown bandicoot, isoodon macrourus, were identified while sequencing expressed sequence tags (ests) from a thymus cdna library. surprisingly, the i. macrourus trd sequences were not orthologous to previously published trd sequences from another australian marsupial, the tammar wallaby, macropus eugenii. identification of trd genes in the recently completed whole genome sequence of the south american opossum, ... | 2005 | 16160827 |
| the gut-associated lymphoid tissues of the northern brown bandicoot (isoodon macrourus). | the gut associated lymphoid tissues (galt) of a juvenile bandicoot has been examined using histological and immunohistochemical techniques. the mesenteric lymph nodes were hyperfollicular and had well defined paracortical and medullary areas. lymphocytes were densely packed throughout the cortex and paracortex and the mantles of the follicles. the galt contained two distinct areas of tissue organisation. one consisted of large areas of aggregated follicles, whilst the other consisted of more lin ... | 2002 | 12377223 |
| induction of birth in the bandicoot (isoodon macrourus) with prostaglandin and oxytocin. | as in eutherians, maturation of the fetal pituitary and adrenal glands together with an increase in prostaglandin and mesotocin or oxytocin production initiates birth in marsupials. in this study, prostaglandin (lutalyse) or oxytocin (syntocinon) were administered to pregnant bandicoots at 05:00 h on the calculated day of birth and the resultant effects were filmed for analysis. the administration of prostaglandin caused the bandicoot to adopt the birth position several minutes after injection ( ... | 2002 | 11866697 |
| sexual development in marsupials: genetic characterization of bandicoot siblings with scrotal and testicular maldevelopment. | in marsupials testis determination requires the presence of a y chromosome. the sex determining region on the y gene (sry) is necessary for testicular development in eutherians and it is assumed to play a similar role in marsupials. relatively few studies have investigated the genetic basis of sexual development, and as yet there is no direct evidence that sry is required for testis development in marsupials. studies on intersexual marsupials have revealed a fundamental difference between marsup ... | 2000 | 10984412 |
| immune system cell markers in the northern brown bandicoot, isoodon macrourus. | this is the first study to report the presence of t and b lymphocyte markers and antigen presenting-like molecules in a marsupial bandicoot. intra-cytoplasmic markers for cd3 and cd5, as well as surface thy-1.1 and cd1a molecules were located in lymphocytes of t dependent regions of immuno-lymphoid tissue in the northern brown bandicoot using immunohistochemical techniques. similarly, intra-cytoplasmic domains of cd79a, cd79b molecules and surface igg molecules enabled characterisation of b lymp ... | 2000 | 10906390 |
| responses of the digestive tract of the omnivorous northern brown bandicoot, isoodon macrourus (marsupialia: peramelidae), to plant- and insect-containing diets. | the gastrointestinal tract of omnivores such as bandicoots (marsupialia: peramelidae) must be able to process foods as different as invertebrates, fungi and plant material. we studied the mechanisms involved in the utilisation by captive northern brown bandicoots (isoodon macrourus) of insect larvae and milled lucerne (medicago sativa) hay incorporated into a basal diet of a commercial small carnivore mix. animals on the plant-basal mix digested less dry matter, energy, lipid, fibre and total ni ... | 1999 | 10549141 |
| development of the thymus, spleen, lymph nodes and liver in the marsupial, isoodon macrourus (northern brown bandicoot, peramelidae). | we report for the first time the development and morphological characteristics of the spleen thymus, lymph nodes and liver of the northern brown bandicoot, isoodon macrourus. to date few marsupial species have been studied. the development and morphological characteristics of the organs shared the typical features of those few other marsupials studied as well as those of eutherians. these suggest comparative functional properties with the eutherian immune system. the thymus differentiated within ... | 1999 | 10460481 |
| sex-chromosome elimination in the bandicoot isoodon macrourus using y-linked markers. | cytogenetic studies have shown that the y chromosome is eliminated from many somatic cell types of the bandicoot isoodon macrourus, an australian marsupial. molecular techniques allow examination of a greater range of tissue types than that possible using cytogenetic techniques. the presence or absence of the y chromosome was established using partial sequences of the y-linked sry and ube1y genes in i. macrourus, with the x-linked gene g6pd as a control. we show that a very small proportion of c ... | 1998 | 9691176 |
| effect of cooling and cryopreservation on sperm motility and morphology of several species of marsupial. | the effects of long-term cooling and freezing on sperm motility are described for six marsupial species: the fat-tailed dunnart, koala, brushtail possum, long-footed potoroo, northern brown bandicoot and ring-tailed possum. the effects of up to eight days of cooling at 4 degrees c on the motility of dunnart spermatozoa and the effect of cryopreservation on spermatozoa of the other species were determined. the cryoprotectant used was a tris-citrate-fructose-egg yolk-glycerol diluent. the percenta ... | 1996 | 8870089 |
| mammalian oocyte organelles with special reference to pleomorphic mitochondria and vacuole formation in marsupials. | marsupial oocytes are larger and have a thinner zona than eutherian oocytes; and the ooplasm becomes almost completely filled with empty-looking vacuoles the contents of which have, so far, defied histochemical analysis. in the opossum, monodelphis domestica, apart from orthodox mitochondria, a 'hooded' form is found occasionally in young primary oocytes, and a novel 'spiked' form-which is very elongate and has longitudinally-running filaments attached to the outer membrane--is found in mature o ... | 1996 | 8870075 |
| ultrastructure and motility of spermatozoa in the male reproductive tract of perameloid marsupials. | the number, distribution, maturation, motility and ultrastructure of spermatozoa from both northern (isoodon macrourus) and southern (isoodon obesulus) brown bandicoots were examined. one epididymidis per animal was fixed for light microscopy and transmission electron microscopy, and the contralateral side was used for the determination of sperm number, distribution and motility. sperm form was similar between the two species. approximately 56 x 10(6) testicular sperm and 100 x 10(6) epididymal ... | 1995 | 8848582 |
| arginine vasopressin- and oxytocin-like peptides in the testis of two australian marsupials. | high performance liquid chromatography (hplc) and specific radioimmunoassay (ria) for arginine vasopressin (avp), mesotocin (mt), and oxytocin (ot) were used to identify and quantify these peptides in the testis of the brushtail possum (trichosurus vulpecula) and the northern brown bandicoot (isoodon macrourus). arginine vasopressin (0.092 +/- 0.041 ng/g) and mt (0.198 +/- 0.089 ng/g), but not ot, were found in the possum testis, while the bandicoot testis contained avp (0.061 ng/g), mt (0.108 + ... | 2016 | 8234012 |
| developmental changes in the erythrocyte metabolism in bandicoot isoodon macrourus. | activities of 13 different enzymes were measured in the erythrocytes of juvenile and adult bandicoots, isoodon macrourus. seven of these enzymes had significantly (p < 0.05 or less) greater activities in the juveniles compared to the adult animals. the activity of one enzyme--phosphofructokinase--was significantly (p < 0.01) lower in the juveniles. however, the activity of nadh-methaemoglobin reductase (mr) was similar in the two groups of animals. the rates of lactate production using four diff ... | 1993 | 8513031 |
| the transfer of thyroxine from the mother to the young of the marsupials, the bandicoot (isoodon macrourus) and the possum (trichosurus vulpecula). | 1. the young of the bandicoot and possum are of similar weight at birth (200-250 mg) but by day 50 post-partum have weights of 100 and 20 g, respectively. the aim of this study was to determine whether the disparate growth rate was associated with a difference in the transfer of thyroxine from mother to young. 2. radioactive thyroxine was injected intramuscularly into the lactating female and 24 hr later a blood sample was obtained from the mother and the pouch young removed. the amount of radio ... | 1992 | 1358508 |
| evidence for the coexistence of serotonin and calcitonin gene-related peptide at the subcellular level in neuroepithelial bodies in the lung of a marsupial, isoodon macrourus. | the coexistence of serotonin and calcitonin gene-related peptide (cgrp) in neuroepithelial bodies of the bandicoot, isoodon macrourus, has been examined using immunocytochemistry at the light- and electron-microscope levels. the avidin-biotin technique of antigen localisation was used initially to identify serotonin-like and cgrp-like immunoreactivity (-li). serotonin-li and cgrp-li were found in neuroepithelial cells in the lungs of 30-day-old bandicoots. cgrp-li could also be demonstrated in n ... | 1992 | 1423521 |
| effect of the presence of females on plasma testosterone concentration of male marsupial bandicoots, isoodon macrourus, housed in enclosures. | to determine whether the presence of sexually active females influences the reproductive processes of the male bandicoot, plasma testosterone concentrations were monitored in males isolated from females. blood samples were obtained weekly from 8 male bandicoots housed with females and from 12 male bandicoots in an enclosure without females. reproductive tracts were obtained from 7 of the male bandicoots of the latter group during the breeding season. in both groups plasma testosterone increased ... | 1991 | 1936927 |
| seasonal breeding in two marsupials, the bandicoot isoodon macrourus and the possum trichosurus vulpecula. | | 1990 | 2200044 |
| the localization of oxytocin and mesotocin in the reproductive tract of the male marsupial bandicoot isoodon macrourus. | the cellular localization of oxytocin and mesotocin within the testis and prostate of the northern brown bandicoot, isoodon macrourus, was examined. tissues were fixed in 4% paraformaldehyde and immunoreactive cells and tissues were detected with antibodies to oxytocin and mesotocin. immunoreactive oxytocin was present in the leydig cells and in the spermatids of the adult and the 263-day bandicoots and there was faint staining in the 123-day bandicoot. mesotocin was not present in the testes of ... | 1989 | 2767399 |
| milk composition in the northern brown bandicoot, isoodon macrourus (peramelidae, marsupialia). | milk samples were obtained at regular intervals throughout lactation from northern brown bandicoots, isoodon macrourus, in captivity. total concentration of milk solids was initially 7% (w/w) and increased linearly to 45% (w/w) by 55 days. carbohydrate, lipid and protein concentrations increased from about 2% (w/w) to about 7-8% (w/w) at 30 days. thereafter they diverged, with lipid increasing to between 25-30% (w/w) at 56 days, protein reaching maximal values of 10-15% (w/w) at just over 40 day ... | 1988 | 3271382 |
| seasonal changes in the reproductive tract of the male marsupial bandicoot, isoodon macrourus. | reproductive activity is seasonal in bandicoots. to determine the seasonal changes in the reproductive tract of the male bandicoot, the morphology of the testis and the prostate was examined during the breeding and non-breeding season. although the dimensions of the testes of the bandicoot did not change with season, the volume of testicular leydig cell tissue increased about twofold and this change within the testis was accompanied by a threefold increase in prostate gland size. the bandicoot p ... | 1987 | 3446658 |
| influence of melatonin on the initiation of the breeding season of the marsupial bandicoot, isoodon macrourus. | melatonin implants were administered to 6 female bandicoots during the months of may and july. these animals, together with 6 control bandicoots were housed in large outside enclosures with mature males. births were observed in the 6 control animals from 26 july to 2 september, but no births were observed in the 6 bandicoots with melatonin implants. these results would suggest that photoperiod, which is known to influence melatonin concentrations, may be a factor in the initiation of births in t ... | 1987 | 3820177 |
| seasonal variations in plasma testosterone concentrations in the male marsupial bandicoot isoodon macrourus in captivity. | although bandicoots in queensland mate throughout the year, the majority of births occur in late winter and spring. to ascertain whether this seasonality in mating is manifest in the male reproductive system; body weight, testes size, and plasma testosterone concentration were examined in eight bandicoots throughout the year. the size of the testes increased with age in all bandicoots and there was no evidence of seasonal variation. plasma testosterone concentrations fluctuated from 0.1 to 70.0 ... | 1985 | 4018558 |
| the effect of prostaglandin f2 alpha analog on the plasma concentration of progesterone in the bandicoot, isoodon macrourus (marsupialia:peramelidae), during lactation. | prostaglandin f2 alpha (pgf) analog was administered to bandicoots during lactation to determine whether pgf2 alpha is involved in the regression of the marsupial corpus luteum. the concentration of progesterone in the plasma, and the morphology of the corpus luteum were monitored following pgf analog treatment. when the drug was administered early in lactation, there was no apparent change in luteal function. however, when pgf analog was administered on days 30 and 31 of lactation an immediate ... | 1985 | 4039279 |
| the embryological development and cytodifferentiation of the anterior pituitary in the marsupial, isoodon macrourus. | light and electron microscopy were used to study the development of the anterior pituitary gland from fetal stages to the end of pouch life in the marsupial i. macrourus. the early morphological development of the anterior pituitary in i. macrourus follows a similar pattern of events to that described for eutherians. rathke's and seessel's pouches were present in 10 1/2 day old embryos. at birth these pouches had formed a multi-chambered vesicle which was still connected to the stomodeum by a th ... | 1985 | 2415023 |
| plasma concentrations of progesterone and 13,14-dihydro-15-keto-prostaglandin f-2 alpha during regression of the corpora lutea of lactation in the bandicoot (isoodon macrourus). | plasma progesterone concentrations (mean +/- s.e.m.) declined from 7.5 +/- 1.2 ng/ml and 7.5 +/- 1.0 ng/ml to less than 1 ng/ml after removal of pouch young (rpy) from bandicoots at days 24 and 30 of lactation respectively. in all 7 bandicoots, the corpora lutea of lactation showed signs of regression and, in 5 of these bandicoots, a premature ovulation had occurred 6-9 days after rpy. there was no change in the concentration of pgfm after rpy, and uterine prostaglandin f-2 alpha may not be invo ... | 1984 | 6512758 |
| the structure and distribution of nasal glands in four marsupial species. | the structure and distribution of nasal glands in four marsupial species were studied by light and electron microscopy. the species studied were the honey possum (tarsipes rostratus), the bandicoot (isoodon macrourus), the koala (phascolarctos cinereus) and the agile wallaby (macropus agilis). glands were grouped and described according to their location. those of general distribution (goblet cells and olfactory glands) were similar in structures and distribution in all specimens. glands of the ... | 1984 | 6490535 |
| the uniformity of growth within the litter of the marsupial, isoodon macrourus. | the amount of information concerning reproduction in eutherian mammals differs markedly with that available for marsupials. there is at present a good understanding of growth in the eutherian litter after birth but the respective information for litter bearing marsupials has still to be obtained. in this study the growth of the young bandicoot after leaving the pouch was examined. each of the monitored young, 38 females and 12 males, was weighed weekly and a growth rate estimated for the ages 65 ... | 1984 | 6540732 |
| observations on graafian follicles and their oocytes during lactation and after the removal of pouch young in the marsupials isoodon macrourus and perameles nasuta. | ovaries from 63 bandicoots (isoodon macrourus and perameles nasuta) were collected in order to obtain graafian follicles close to ovulation for light and electron microscopy. during the first 42 days of lactation (lactation c. 60 days), the follicles were less than 1.0 mm in diameter, whereas from 43 to 52 days, some animals had follicles up to 2.0 mm in diameter, or ovulation had occurred and new corpora lutea were present. this ovulation was associated with the lactation estrus that occurred i ... | 1983 | 6837478 |
| ultrastructural evidence for steroid-hormone production in the adrenal of the marsupial isoodon macrourus, at birth. | to determine whether the adrenal gland of the bandicoot is actively producing steroid hormones at birth, the cellular structure was examined by electron microscopy, and the concentration of cortisol in the gland was determined by radioimmunoassay. two distinct cell populations were seen in the adrenal gland. one group of cells possessed dark staining granules, normally observed in catecholamine-secreting cells, and the second group contained large amounts of smooth endoplasmic reticulum and mito ... | 1982 | 7137605 |
| regional variation in respiratory epithelium of the nasal cavity of the bandicoot (isoodon macrourus). | the non-olfactory ciliated epithelium of the nasal cavity was investigated in the bandicoot (isoodon macrourus), a small ground-dwelling marsupial. two distinct epithelial types were identified and designated conchal and septal. conchal epithelium is non-secretory. it covers most of the naso- and maxilloturbinates, the lateral nasal wall, and part of the maxillary sinus. septal epithelium contains mucus-secreting goblet cells. rostrally, it covers the nasal septum and mid-ventral floor of the na ... | 1982 | 7076534 |
| the structure of the lung of the newborn marsupial bandicoot, isoodon macrourus. | in bandicoots, implantation takes place 9.5 days after mating and birth occurs 3 days later. it is therefore of interest to examine the lungs of newborn marsupials to ascertain the stage of lung development with respect to other organs and other mammals in view of the short period of time allowed for maturation of lung tissue. the newborn bandicoot lung is composed of a primitive system of branching airways which terminate in large blind sacs; alveolar ducts or alveoli are not present. the termi ... | 1982 | 6896015 |
| [a comparative anatomical study of the pectoral muscle group in brindled bandicoot (isoodon macrourus gould, 1842), an australian marsupial (author's transl)]. | | 1981 | 7340378 |
| the role of the corpus luteum of lactation in the bandicoot isoodon macrourus (marsupialia: peramelidae). | | 1981 | 7239154 |
| plasma concentrations of progesterone and 13,14-dihydro-15-keto-prostaglandin f-2 alpha at parturition in the bandicoot, isoodon macrourus. | the concentration of progesterone in maternal plasma of the bandicoot increased from 3.9 to 12.6 ng/ml between 11 and 4 days before parturition and remained at this level for at least 7 days. concentrations of 13,14-dihydro-15-keto-prostaglandin f-2 alpha increased from basal levels of 288 pg/ml (4 days before birth) to maximal levels of 2534 pg/ml immediately after parturition, then decreased progressively. it is suggested that pgf-2 alplha, but not progesterone, influences the initiation of pa ... | 1980 | 7431325 |
| observations on the primordial oocyte of the bandicoot isoodon macrourus (peramelidae, marsupialia). | an ultrastructural study of bandicoot primordial follicles and oocytes was undertaken, as information on this subject is lacking in marsupials. conspiculous features of the ooplasm are a paranuclear complex (pnc), a vesicle-microtubule complex (vmc) and an aggregate of tubular cisternae (atc). the pncappears as one or, more rarely, several homogeneous eosinophil bodies at the light microscope level. ultrastructurally it is particulate, consisting of five distinct types of bodies, most of which a ... | 1979 | 468712 |
| the olfactory apparatus of the bandicoot (isoodon macrourus): fine structure and presence of a septal olfactory organ. | the structure and extent of olfactory epithelium in the bandicoot (isoodon macrourus) were examined by light and electron microscopy. sensory epithelium covers most of the dorsal conchae, though non-sensory epithelium lines ventrally facing scrolls. the middle conchae are partly covered by olfactory epithelium, the proportion of olfactory to ciliated respiratory epithelium increasing caudally. ventral conchae are lined by non-sensory ciliated epithelium. the nasal septum ends short of the floor ... | 1978 | 640961 |
| organization of desmosomes in bowman's gland duct cells in a marsupial. | non-secretory cells lining the ducts of bowman's gland in the olfactory epithelium of the bandicoot (isoodon macrourus) are united below the duct lumen by an unusually well-organized series of desmosomes linked by conspicuous fibrillar bundles with long mitochondria aligned close to the bundles. it is suggested that these junctional specializations may help to maintain an intact duct lumen in a part of the epithelium with considerable intercellular space. | 1977 | 842472 |
| the spermatogenic cycle of the bandicoot, isoodon macrourus. | | 1973 | 4688336 |
| development of the incisors in two pouch-young stages of isoodon macrourus. | | 1972 | 4504645 |
| water metabolism of the bandicoot isoodon macrourus gould in the wild. | | 1972 | 4401141 |
| molecular surveillance of piroplasms in ticks from small and medium-sized urban and peri-urban mammals in australia. | natural landscape alterations as a consequence of urbanisation are one of the main drivers in the movements of wildlife into metropolitan and peri-urban areas. worldwide, these wildlife species are highly adaptable and may be responsible for the transmission of tick-borne pathogens including piroplasms (babesia, theileria and cytauxzoon spp.) that cause piroplasmosis in animals and occasionally in humans. little is known about piroplasms in the ticks of urban wildlife in australia. ticks from lo ... | 2018 | 29988853 |
| overcoming prey naiveté: free-living marsupials develop recognition and effective behavioral responses to alien predators in australia. | naiveté in prey arises from novel ecological mismatches in cue recognition systems and antipredator responses following the arrival of alien predators. the multilevel naiveté framework suggests that animals can progress through levels of naiveté toward predator awareness. alternatively, native prey may be preadapted to recognize novel predators via common constituents in predator odors or familiar predator archetypes. we tested predictions of these competing hypotheses on the mechanisms driving ... | 2019 | 30822357 |