Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| absence of countercurrent exchange of oxygen, carbon dioxide, hydrogen ions or glucose between the arterial and venous blood in the spermatic cords of rams and two marsupials (macropus eugenii and megaleia rufa). | 1969 | 5357945 | |
| development of dormant blastocysts induced by oestrogen in the ovariectomized marsupial, macropus eugenii. | 1969 | 5783760 | |
| thermal balance of the macropodid marsupial macropus eugenii desmarest. | 1969 | 5367360 | |
| progesterone-induced development of dormant blastocysts in the tammar wallaby, macropus eugenii desmarest; marsupialia. | 1969 | 5388437 | |
| resumption of development by quiescent blastocysts transferred to primed, ovariectomized recipients in the marsupial, macropus eugenii. | 1970 | 5472445 | |
| protein, amino acids and glucose in the yolk-sac fluids and maternal blood sera of the tammar wallaby, macropus eugenii (desmarest). | 1970 | 5453378 | |
| absolute duration of survival of tammar wallaby (macropus eugenii, marsupialia) on sea water and dry food. | 1971 | 4150229 | |
| the effect of artificial cryptorchidism on the testis and on testicular blood flow in an australian marsupial, macropus eugenii. | 1971 | 4396836 | |
| protein composition of uterine fluids during early gestation of the tammar wallaby. | 1971 | 5539102 | |
| peripheral plasma progesterone during pregnancy and the oestrous cycle in the tammar wallaby, macropus eugenii. | 1972 | 4676738 | |
| the development of a radioimmunoassay for gonadotrophin in the tammar wallaby, macropus eugenii. | 1972 | 5007979 | |
| mother-young relations and early behavioural development in the marsupials macropus eugenii and megaleia rufa. | 1973 | 4782236 | |
| the composition of fetal fluids of the marsupial macropus eugenii. | 1973 | 4789603 | |
| intrauterine development after diapause in the marsupial macropus eugenii. | 1973 | 4791592 | |
| proteins in the uterine secretions of the marsupial macropus eugenii. | 1973 | 4133285 | |
| the pituitary gland and pregnancy in the marsupial, macropus eugenii, employing hypophysectomy and radioimmunoassay for gonadotrophin. | 1973 | 4688349 | |
| transferrin variation between mother and fetus in the marsupial, macropus eugenii. | 1973 | 4700794 | |
| the development of thermoregulation and thyroid function in the marsupial macropus eugenii (desmarest). | 1974 | 4156248 | |
| the pituitary gland and implantation in the tammar wallaby, macropus eugenii. | 1974 | 4854992 | |
| plasma antidiuretic hormone levels in tammar wallabies (macropus eugenii) as measured with a toad bioassay. | 1975 | 415102 | |
| the recycling of urea nitrogen by the wild tammar wallaby (macropus eugenii)--a "ruminant-like" marsupial. | 1975 | 237701 | |
| proceedings: effects of hypophysectomy on the structure and function of the adrenal cortex in the tammar wallaby, macropus eugenii. | 1975 | 1151215 | |
| hypophysectomy of the tammar wallaby, macropus eugenii: surgical approach and general effects. | a technique of hypophysectomy and regimes of pre- and post-operative care were developed for the tammar wallaby, macropus eugenii, to a stage when animals can survive the operation with little apparent stress. thyroid and adrenal gland weights declined after hypophysectomy, especially within the first 20-30 days. changes in the adrenal cortex after hypophysectomy suggested that this region may have a zonal organization different from that in eutherian mammals. the reproductive tracts of males an ... | 1975 | 1133526 |
| the rôle of the pituitary in the reproduction of the male tammar wallaby, macropus eugenii. | 1975 | 1117458 | |
| adrenocortical hormones in the neonate and pouch young of the tammar wallaby, macropus eugenii. | 1976 | 950538 | |
| adrenal insufficiency and the effects of steroid replacement therapy in the tammar wallaby (macropus eugenii). | 1976 | 1255108 | |
| the in vitro response to phytomitogens of marsupial leukocytes. | leukocytes from two macropod marsupials, the quokka (setonix brachyuras) and the tammar (macropus eugenii) were separated from whole blood by dextran sedimentation and established in culture with either phytohemagglutinin-p, concanavalin a, or pokeweed mitogen. the leukocyte response to each mitogen, as measured by the incorporation of tritiated thymidine into dna, was similar to that described in other experimental systems. these results suggest that the functional elements of the cellular immu ... | 1976 | 979144 |
| exsheathment of the infective larva of labiostrongylus eugenii, a nematode parasite of the kangaroo island wallaby macropus eugenii. | 1977 | 18419 | |
| oxygen affinity and 2,3-diphosphoglycerate in blood of australian marsupials of differing body size. | oxygen carriage and 2,3-diphosphoglycerate (2,3-dpg) levels have been measured in the blood of seven species of australian marsupials ranging in size from 35 to 0.03 kg. they were red and grey kangaroos, wallaroo, tammar wallaby, brush-tailed possum, potoroo, and brown marsupial mouse. oxygen affinity decreased with decrease in adult body size, standard p50 (at 36 c) varying from 24.6 torr in the largest (red kangaroo) to 41.9 torr in the smallest (brown marsupial mouse). the relationship betwee ... | 1977 | 24866 |
| the life history of labiostrongylus eugenii, a nematode parasite of the kangaroo island wallaby (macropus eugenii): the parasitic stages. | 1977 | 598963 | |
| the life history of labiostrongylus eugenii, a nematode parasite of the kangaroo island wallaby (macropus eugenii): development and hatching of the egg and the freeliving stages. | 1977 | 598962 | |
| metabolic effects of infusion of cortisol and adrenocorticotrophin in the tammar wallaby (macropus eugenii desmarest). | 1977 | 200523 | |
| the structure of the cells lining the stomach of the tammar wallaby (macropus eugenii). | the stomach of the tammar may be divided into cardiac, "oesophageal", fundic and pyloric regions. in the cells of the cardiac region (which occupy 65% of the stomach) at least three types of mucous droplet are present. the stratified squamous "oesophageal" region occupies 20% of the stomach and the fundic and pyloric regions make up the remaining 15%. the cellular structure of the three last named regions seems to be similar to that described for other monogastric mammals. endocrine cells were f ... | 1977 | 885785 |
| the regulation of gluconeogenesis in pouch young of the tammar wallaby, macropus eugenii (desmarest). | 1977 | 921631 | |
| photoperiod and the termination of embryonic diapause in the marsupial macropus eugenii. | 1977 | 861331 | |
| immunological aspects of gestation in the tammar wallaby, macropus eugenii. | sensitization to male histocompatibility antigens and repeated pregnancy to the same male were found to have little effect on fertility or length of gestation in the tammar wallaby, m. eugenii. however, in some sensitized females a long interval occurred between removal of pouch young and the next birth. in addition to studies on fertility, the immunological response of female tammars to their mate has been examined by one-way mixed leucocyte culture (mlc) carried out at the beginning and end of ... | 1978 | 150268 |
| embryonic diapause in the marsupial macropus eugenii. stimulation of nuclear rna polymerase activity in the blastocyst during resumption of development. | 1978 | 618903 | |
| differential transport of spermatozoa into the two sides of the genital tract of a monovular marsupial, the tammar wallaby (macropus eugenii). | ovulation in the tammar wallaby alternates between the ovaries. the genital duct of each side enters the median vaginal culs-de-sac separately. post-partum oestrus occurred 0.4 days after birth and ovulation 1 day later. after a single copulation spermatozoa were found in both cervical canals at 0.5 h and extended to the oviduct on the non-parturient side only by 8 h. very few spermatozoa were found in sections of the post-partum uterus or its associated oviduct at any time. spermatozoa were rec ... | 1978 | 563911 |
| hormonal control of embryonic diapause and reactivation in the tammar wallaby. | suckling is the most important and best-known influence that the marsupia offspring exerts on its mother but recent evidence suggests that this is not the only way it proclaims its presence. the pregnant female differs from the non-pregnant in several features, which appear to be due to the presence of the conceptus in the uterus. the converse influence of the female on the embryo is best known in kangaroos and wallabies because the facultative and obligate embryonic diapause they exhibit has pr ... | 1978 | 259038 |
| fractionation and biological actions of pituitary gonadotropins from a marsupial, the wallaby (macropus eugenii). | 1978 | 719112 | |
| prolactin receptors in the mammary gland, corpus luteum and other tissues of the tammar wallaby, macropus eugenii. | specific binding of radio-iodinated ovine prolactin to subcellular tissue fractions of the tammar wallaby (macropus eugenii) was investigated. specific binding was found, in order of decreasing binding activity, in the lactating mammary gland, corpus luteum, corpus albicans, adrenal gland and ovary. specific binding was absent in kidney, liver, brain and inactive mammary gland. the mean association constant (ka at 23 degrees c) was determined as 0.90 x 10(9), 2.20 x 10(9), 2.44 x 10(9), 3.38 x 1 ... | 1979 | 230279 |
| growth of the corpus luteum and its progesterone content during pregnancy in the tammar wallaby, macropus eugenii. | corpora lutea were obtained from wallabies at different stages of pregnancy, following removal of pouch young to initiate embryonic development. progesterone was present at a concentration of 11.3 ng/mg in quiescent corpora lutea from lactating animals. progesterone values rose with increasing corpus luteum weight to reach a maximum of 40--50 ng/mg in corpora lutea weighing 50--60 mg. total progesterone reached a maximum of 1500 +/- 300 (s.e.m.) ng at days 21--23 after removal of pouch young, bu ... | 1979 | 512995 |
| steroids in pregnancy and parturition in the marsupial, macropus eugenii. | 1979 | 491623 | |
| the effect of pregnancy on the interval between one oestrus and the next in the tammar wallaby, macropus eugenii. | in females mated to vasectomized males the interval between oestrous periods was 30.6 +/- 1.17 (s.d.) days but when mated to intact males and pregnancy intervened, it was 29. +/- 1.26 days (p less than 0.0025). after removal of pouch young, females carrying diapausing blastocysts gave birth 26.2 days later and came into oestrus 26.4 +/- 0.57 (s.d.) days later. when post-partum fertilization was prevented, removal of pouch young was followed by oestrus 30.4 +/- 0.99 days later (p less than 0.0005 ... | 1979 | 480304 |
| the effects of corpus luteum removal during gestation on parturition in the tammar wallaby (macorpus eugenii). | removal of the corpus luteum of pregnancy of the tammar wallaby interfered with successful parturition if carried out before day 17 of the 27-day pregnancy. after removal at days 17 and 21, 40% of animals gave birth but pouch young died with 24 h; if performed at days 23 or 25, pouch young survived. however, surgery also affected sham-operated controls if performed between days 15 and 21. in control animals, sodium pentobarbitone followed by halothane anaesthesia was the least disruptive anaesth ... | 1979 | 469849 |
| steroid metabolism in the yolk sac placenta and endometrium of the tammar wallaby, macropus eugenii. | yolk sac and endometrial tissue were obtained from tammar wallabies between 11 and 25 days after the removal of pouch young. tissues were examined histologically and steroid-metabolizing enzymes were identified by incubation for 3 h at 37 degrees c in medium 199 containing labelled steroid precursors. yolk sac membrane (ysm) incubated with labelled pregnenolone produced a small amount of progesterone and pregnanediols; 80.5 +/- 8.4 (s.e.m.) % of the original substrate remained unmetabolized. lab ... | 1980 | 6450256 |
| phenypressin (phe2-arg8-vasopressin), a new neurohypophysial peptide found in marsupials. | recent investigations on marsupial neurohypophysial hormones have revealed that species belonging to the australian family macropodidae and the american family didelphidae have, apart from an oxytocin-like hormone, two vasopressin-like peptides which can be separated either by ion-exchange chromatography or chromatoelectrophoresis. the major pressor hormone of two australian species, the red kangaroo (macropus rufus) and the tammar (macropus eugenii), has been identified as lysine vasopressin by ... | 1980 | 7432483 |
| [evolution of vasopressins in marsupials: a new hormone, phenypressin (phe2-arg8-vasopressin), present in the macropodidae]. | a duplication of the pressor hormone has been found in some marsupials, either american species belonging to the family didelphidae or australian species belonging to the family macropodidae. two pressor peptides, lysine vasopressin and phenypressin (phe2-arg8-vasopressin) have been chemically identified in the red kangaroo (macropus rufus) and the tammar (macropus eugenii). in contrast, the brush-tailed possum (trichosurus vulpecula), a species belonging to the family phalangeridae, has a singl ... | 1980 | 6780214 |
| progesterone metabolism during embryonic diapause in the tammar wallaby, macropus eugenii. | 1980 | 7431315 | |
| structure of a marsupial-mild trisaccharide. | a trisaccharide, which is a major carbohydrate component of the milk of the tammar wallaby and the grey kangaroo, has been identified by chemical, enzymic, g.l.c.-m.s., and n.m.r. methods as o-beta-d-galactopyranosyl-(1 yields 3)-o-beta-d-galactopyranosyl-(1 yields 4)-d-glucose (3'-galactosyl-lactose). | 1980 | 7407802 |
| effect of gonadectomy, season and the presence of female tammar wallabies (macropus eugenii) on concentrations of testosterone, luteinizing hormone and follicle-stimulating hormone in the plasma of male tammar wallabies. | concentrations of fsh, lh and testosterone in plasma were measured in groups of adult male tammar wallabies before and after gonadectomy, and during the breeding and non-breeding seasons. gonadectomy resulted in a rapid fall in plasma testosterone to undetectable levels by day 2, and significant increases in plasma lh and fsh levels. the concentrations of fsh, lh and testosterone did not change significantly between the non-breeding and breeding seasons in groups of male wallabies maintained in ... | 1980 | 6776214 |
| changes in milk composition during lactation in the tammar wallaby (macropus eugenii). | milk samples were obtained at regular intervals throughout lactation from tammar wallabies (m. eugenii). total solids represented only 12% (w/w) of the milk at the commencement of lactation and gradually increased to about 40% at 36 weeks. milk proteins represented 4% (w/w) of whole milk during the first 18 weeks of lactation, followed by a rapid increase to around 13% (w/w) at 36 weeks. sodium and potassium concentrations were high in early samples of milk but declined to minimal values at 30 w ... | 1980 | 7396806 |
| control of gonadotrophin secretion in the female tammar wallaby (macropus eugenii). | a heterologous radioimmunoassay for tammar wallaby fsh, using an ovine fsh antiserum and a human fsh tracer, is described. with this assay concentrations of fsh in plasma of intact female tammars are not detectable except rarely at the time of oestrus. however the assay has proved useful in studies of the control of gonadotrophin secretion in intact male and in ovariectomized tammars. in the female tammar, concentrations of lh and fsh in plasma rose within a few days of bilateral ovariectomy. ov ... | 1980 | 6776212 |
| intestinal lactase (beta-galactosidase) and other glycosidase activities in suckling and adult tammar wallabies (macropus eugenii). | the activities of various glycosidases in homogenates of the small intestinal mucosa of two adult and 18 suckling tammar wallabies (m. eugenii) aged from 6 to 50 weeks were investigated. lactase (beta-d-galactosidase), beta-n-acetylglucosaminidase, alpha-l-fucosidase and neuraminidase activities were high during the first 34 weeks post partum and then declined to very low levels. maltase, isomaltase, sucrase and trehalase activities were very low or absent during the first 34 weeks, and then inc ... | 1980 | 6783021 |
| macropodid marsupial luteinizing hormone: validation of assay procedures and changes in concentrations in plasma during the oestrous cycle in the female tammar wallaby (macropus eugenii). | a heterologous double antibody radioimmunoassay employing a rabbit anti-ovine lh antiserum (gdn no. 15) has been developed for the assessment of concentrations of lh in macropodid marsupial pituitary extracts and plasma. in this radioimmunoassay system highly purified ovine, rat human and kangaroo lh preparations demonstrated apparently parallel dose-response curves, as did serial dilutions of crude pituitary extracts from a wide range of austrlian marsupial species and serial dilutions of plasm ... | 1980 | 7430881 |
| comparative studies of embryo metabolism in early pregnancy. | embryo metabolism during early pregnancy has been investigated, mainly in the mouse and rabbit, using a variety of catabolic and anabolic parameters. the rate of metabolic activity of the conceptus continues to increase markedly with the approach of implantation. however, in species in which the embryo enters a period of delayed implantation the diapause is associated with relative metabolic quiescence. mouse, rabbit, ovine and bovine preimplantation embryos can be cultured in a simple defined m ... | 1981 | 7014867 |
| the distribution and sizes of ganglion cells in the retinas of five australian marsupials. | maps of ganglion-cell distribution have been constructed from whole-mounted retinas of five australian marsupial species. the pademelon wallaby (thylogale billiardieri), the scrub wallaby or tammar (macropus eugenii), and the carnivorous tasmanian devil (sarcophilus harissi) have both a visual streak and an area centralis. the retina of the brown bandicoot (isoodon obesulus) also shows both these features but they are less prominent than in the former three species, whereas the burrow-dwelling, ... | 1981 | 7204673 |
| the prevalence of anti-leptospiral agglutinins in sera of wildlife in southeastern australia. | anti-leptospiral agglutinins were found in the serum from 18 (7 species) of 419 (25 species) animals sampled from various areas of southeastern australia. positive serologic reactions were observed in 5 of 25 (20%) brush-tailed possum (trichosurus vulpecula), 1 of 26 (3.8%) tammar wallaby (macropus eugenii), 2 of 12 (16.7%) swamp wallaby (wallabia bicolor), 1 of 3 (33.3%) koala (phascolarctos cinereus), 3 of 41 (7.3%) common wombat (vombatus ursinus), 2 of 100 (2%) bush rat (rattus fuscipes) and ... | 1981 | 7241704 |
| enzymes of galactose metabolism in livers of suckling and adult tammar wallabies (macropus eugenii) and other marsupials. | the activities of galactokinase, hexose-1-phosphate uridylyl transferase and udpglucose 4-epimerase in homogenates of livers of two adult and 20 suckling tammar wallabies aged from 6 to 50 weeks were investigated. the activities of all three enzymes were high until 24-30 weeks post partum, after which they declined to low levels. the activities of the three liver enzymes were high in pouch young of six other species of marsupial. comparison of the activities of the three liver enzymes in sucklin ... | 1981 | 6272674 |
| long-term effects of corticosteroid administration in the tammar wallaby, macropus eugenii. | 1981 | 7286630 | |
| pituitary and ovarian factors associated with seasonal quiescence of the tammar wallaby, macropus eugenii. | the role of the corpus luteum, the ovarian interstitial tissue and the ovarian cortex in the maintenance of the diapausing embryo was investigated by selective excision of the component tissues from female tammars undergoing seasonal quiescence. the response of the pituitary was assessed by measuring lh in peripheral plasma. no part of the ovary was necessary for the continued survival of the blastocyst in diapause for up to 4 months after ovariectomy, but at 8 months no blastocyst reactivated n ... | 1981 | 7277323 |
| hepatic glycogen metabolism and its regulation by hormones in pouch young of the tammar wallaby, macropus eugenii (desmarest). | 1981 | 6266908 | |
| biochemical studies of intrauterine components of the tammar wallaby macropus eugenii during pregnancy. | 1981 | 7276816 | |
| relationship between amino acid intake and accretion in a marsupial, macropus eugenii. i. total amino acid composition of the milk throughout pouch life. | the total amino acid composition of 57 samples of milk was analyzed by ion exchange resin chromatography after acid hydrolysis of proteins. the concentrations of most of the amino acids in the milk increased in proportion to the increase in milk protein. sharp increases in the sulfur-containing amino acids, cystine (and/or cysteine) and methionine occurred at around 140-160 days which is about the time of hair follicle development. the remaining amino acids reached a peak concentration by 220 da ... | 1981 | 7284490 |
| embryonic diapause in marsupials. | amongst the marsupials embryonic diapause has been regarded as a characteristic of the family macropodidae, since it has been described in all but one of the 20 or so kangaroos and wallabies examined. diapause has not been demonstrated unequivocally in other marsupials, although the non-macropodids cercartetus and acrobates have uncertain status in this regard. recently, however, diapause has been described in the non-macropodid tarsipes. diapause in macropodid marsupials may be obligate or facu ... | 1981 | 7014870 |
| seasonal changes in the accessory reproductive system and plasma testosterone levels of the male tammar wallaby, macropus eugenii, in the wild. | 1982 | 7175821 | |
| metabolic effects of acth in the tammar wallaby, macropus eugenii: the role of the adrenal medulla. | 1982 | 6284587 | |
| the mammary glands of the tammar wallaby (macropus eugenii) during pregnancy and lactation. | the 4 mammary glands of a nulliparous tammar wallaby differentiate during the 27-day pregnancy in preparation for lactation. alveoli increase in size and number in the first half of gestation, and this increase continues slowly to term. at or soon after parturition the alveolar lumina enlarge as the gland to which the young is attached begins to secrete. the connective tissue stroma of the gland is progressively replaced throughout pregnancy and lactation with glandular tissue. gross dimensions ... | 1982 | 7077604 |
| plasma progesterone levels in the pregnant and non-pregnant tammar, macropus eugenii. | the plasma progesterone concentrations were measured in one group of tammars undergoing non-delayed oestrous cycles and pregnancy, and in another group undergoing pregnant and non-pregnant cycles which had been inhibited by lactation and initiated by removal of the pouch young. the basal concentrations of progesterone during lactation and for the first 5 days of the cycle were less than 200 pg/ml. in all animals there was a consistent peak of about 450 pg/ml lasting 1-2 days, on days 5-8 and thi ... | 1982 | 7069348 |
| effects of progesterone, oestradiol-17 beta and androstenedione on follicular growth after removal of the corpus luteum during lactational and seasonal quiescence in the tammar wallaby. | the corpus luteum was removed from tammar wallabies during either lactational or seasonal quiescence, and the pouch young were replaced on the teat after lutectomy. follicular development resumed and the animals came into oestrus 11-14 days later. injections of oil, progesterone or androstenedione did not prevent follicular growth, although ovulation only occurred in one animal, but treatment with oestradiol-17 beta, either alone or mixed with progesterone, inhibited the development of follicles ... | 1982 | 7069342 |
| ultrastructure of the nongranulated cells and morphology of the extracellular spaces in the pars distalis of adult and pouch-young tammar wallabies (macropus eugenii). | differentiated nongranulated (folliculo-stellate) cells were observed in the centre and periphery of the cords of cells in the pars distalis of the adult tammar wallaby (macropus eugenii). the nongranulated cells formed follicles containing a small lumen: the cell apices were joined by junctional complexes including zonulae adhaerentes and maculae adhaerentes (desmosomes). follicles of granulated cells were also occasionally found. follicles were rarely observed in the adult, but were numerous a ... | 1982 | 7151130 |
| changes in the milk proteins during lactation in the tammar wallaby, macropus eugenii. | samples of whey proteins from the milk of tammar wallabies, macropus eugenii, were examined by acrylamide gel electrophoresis at all stages of lactation up to 280 days post partum. whey albumin, beta-globulin and gamma-globulin fractions had similar electrophoretic mobility to that of the equivalent serum protein fractions, but the proteins in the alpha-globulin and pre-albumin regions differed markedly. the alpha-globulins are presumed polymorphic because individuals at the same stage of lactat ... | 1982 | 7126055 |
| ontogeny of the brain in a marsupial (macropus eugenii) throughout pouch life. i. brain growth. | growth characteristics of the tammar wallaby brain have been determined from 143 animals at various stages of growth from birth to adulthood, with particular emphasis on the 250 days of pouch life. the macroscopic anatomy of the brain is also described for pouch young at days 3, 5, 88 and 190 days after birth, and for the adult. the transition from the rapid to mature growth phases of each brain structure occurs between days 120 and 180 after birth, and coincides with the appearance of previousl ... | 1982 | 7104670 |
| effect of steroids on thyroid activity and adrenal morphology in tammar wallabies after removal of the corpus luteum. | 1. plasma total thyroxine (tt4) levels and plasma free thyroxine (ft4) index were significantly lower in adult tammar wallabies (macropus eugenii) from which the corpus luteum had been removed than in sham-operated controls. 2. progesterone injections given for 14 days after corpus lutectomy significantly elevated the plasma free tri-iodothyronine (ft3) index, but had no effect on other thyroid parameters measured. 3. estrogen and androstenedione given for 14 days after corpus lutectomy had no s ... | 1982 | 6128134 |
| prolactin and luteinizing hormone receptors in marsupial corpora lutea: relationship to control of luteal function. | prolactin and lh receptor concentrations in tammar wallaby corpora lutea (cl) have been examined and related to the control of luteal function in this and other marsupial species. during embryonic diapause, quiescent cl contained high concentrations of prolactin receptors. this was consistent with an earlier suggestion that prolactin may act directly on the cl to maintain its quiescent state. however, despite an apparent seasonal change in the mechanism by which the cl is maintained in quiescenc ... | 1982 | 6276490 |
| prolactin in the marsupial macropus eugenii, during the estrous cycle, pregnancy and lactation. | an heterologous double antibody radioimmunoassay (ria) using a guinea-pig antiserum (33-9) raised against human prolactin and 125i-ovine prolactin has been developed to measure prolactin (prl) in plasma and pituitary preparations of marsupials. in this system, purified tammar and kangaroo prl preparations showed parallel dose-response curves as did serial dilutions of crude pituitary homogenates of tammar, possum and eastern grey kangaroo. serial dilutions of plasma from ovariectomized and lacta ... | 1982 | 6282349 |
| purification, properties, partial sequence and evolutionary relationships of marsupial erythrocyte carbonic anhydrase. | carbonic anhydrase (ec 4.2.1.1) has been purified from the erythrocytes of the tammar wallaby (macropus eugenii desmarest). the enzyme was separated into four zones of activity. the three major individual forms were isolated as discrete entities. comparison of substrate specificity, specific activities, kinetic constants and inhibition characteristics indicated that these heteromorphs represented minor post-translational modifications of a single gene product of carbonic anhydrase ii type. doubl ... | 1982 | 6817802 |
| positional distribution of fatty acids in triglycerides from milk of several species of mammals. | milk triglycerides from the echidna, koala, tammar wallaby, guinea pig, dog, cat, weddell seal, horse, pig and cow were subjected to fatty acid and stereospecific analysis to determine the positional distribution of the fatty acids in the triglycerides. the samples presented a wide range of fatty acids, most of which varied in content among species. the compositions of the acids at the 3 positions also varied among species, reflecting the content of these acids in the triglycerides. however, the ... | 1982 | 7109856 |
| glucose-6-phosphate dehydrogenase and lactate dehydrogenase activity in kangaroo and mouse oocytes. | glucose-6-phosphate dehydrogenase and lactate dehydrogenase activity in oocytes and follicle cells of the australian marsupial, macropus eugenii (the tammar), and the mouse were determined by a simplified microelectrophoresis method. mouse oocytes have approx 285 times more g6pd activity per picolitre of cytoplasm than tammar oocytes and about 10 times more ldh. the ratio of ldh to g6pd in mouse follicle cells is close to 3 whereas in the tammar it approaches unity. the very low levels of activi ... | 1983 | 6617161 |
| marsupial neurohypophysial hormones: identification of mesotocin, lysine vasopressin, and phenypressin in the quokka wallaby (setonix brachyurus). | the neurohypophysial hormones of the quokka wallaby (setonix brachyurus) have been isolated through preparative high pressure liquid chromatography (hplc). one oxytocin-like and two vasopressin-like peptides have been found. these peptides have been characterized by their amino acid composition and by their retention time in hplc. mesotocin ([i1e8]-oxytocin) has been identified by amino acid composition, polar partition chromatography, high pressure liquid chromatography with a reversed phase co ... | 1983 | 6618161 |
| effect of changing photoperiod on peripheral plasma prolactin and progesterone concentrations in the tammar wallaby (macropus eugenii). | in tammar wallabies kept in normal daylengths between the equinoxes, births occurred at the normal time after the summer solstice and the progesterone profile reflected this cycle. there were no significant changes in plasma prolactin. in tammars placed in a 15l:9d photoperiod and then, 5 weeks later, in 12l:12d, births occurred 29-36 days after the daylength was reduced. a characteristic transient peak of plasma progesterone occurred 8-14 days after the change, indicating a delay of 3-9 days in ... | 1983 | 6631827 |
| effect of pgf-2 alpha on uterine activity, and concentrations of 13, 14-dihydro-15-keto-pgf-2 alpha in peripheral plasma during parturition in the tammar wallaby (macropus eugenii). | intravenous administration of pgf-2 alpha or an analogue stimulated uterine contractility in gravid uteri during seasonal quiescence and late pregnancy. the exogenous pgf-2 alpha was metabolized to 13,14-dihydro-15-keto-pgf-2 alpha (pgfm) which was assayed in peripheral plasma by a radioimmunoassay. pgfm was cleared from the circulation with a half life of 8-15 min. blood samples were taken approximately every 6 h from day 26 to day 30 from tammars which were expected to give birth on day 27-28. ... | 1983 | 6579303 |
| electromyographic events in the stomach and small intestine of a small kangaroo, the tammar wallaby (macropus eugenii). | the extracellular electrical activity of the stomach and small intestine of a macropodid marsupial was studied using chronically implanted bipolar electrodes. recordings from the elongate, tubular, haustrated stomach showed triphasic slow waves with a frequency of 5.5/min, an amplitude of 120 microv and an aborad propagation rate of 3 mm/sec. action potentials were recorded only from the pylorus. these occurred as bursts of six to fourteen consecutive spikes. shortly after the period of regular ... | 1983 | 6631744 |
| mammary gland lactose, plasma progesterone and lactogenesis in the marsupial macropus eugenii. | mammary gland lactose concentrations in pregnant tammar wallabies remained low at 115 +/- 24 (s.e.m.) micrograms/g wet weight of tissue until immediately before parturition, then increased to 1274 +/- 262 micrograms/g after birth. concentrations in non-pregnant cyclic animals were generally low (143 +/- 36 micrograms/g), but were raised in three animals around the time of oestrus. removal of the corpus luteum on day 18 of pregnancy or the oestrous cycle caused an increase in lactose concentratio ... | 1983 | 6864146 |
| germ cell development in female pouch young of the tammar wallaby (macropus eugenii). | the cytology, timing, numbers and arrangement of germ cells in gonads of 35 female tammar wallaby pouch young aged from newborn to 210 days post partum were determined from serial sections. germ cell cytology was essentially similar to that in eutherians. the total number of germ cells per ovary reached a peak of about 4.5 x 10(5) at 50 days and was reduced to about 25% of the maximum value by 210 days. the first oogonia developed from primordial germ cells soon after birth; the first meiotic oo ... | 1983 | 6834329 |
| identification of mesotocin, lysine vasopressin, and phenypressin in the eastern gray kangaroo (macropus giganteus). | the neurohypophysial hormones of the eastern gray kangaroo (macropus giganteus) have been isolated through molecular sieving and paper chromatoelectrophoresis. one oxytocin-like and two vasopressin-like peptides have been found. these peptides have been characterized by amino acid analysis. mesotocin ([ile8]-oxytocin), has been identified both by amino acid composition and by behavior in partition chromatography. lysine vasopressin has been characterized by amino acid composition and by partial ... | 1983 | 6826050 |
| in-vitro secretion of progesterone by the corpus luteum of the tammar wallaby, macropus eugenii. | luteal tissue collected from tammars 0, 5, 9 and 16 days after removal of pouch young actively produced progesterone in vitro. on days 5, 9 and 16 luteal progesterone concentration was not significantly different from day 0 (quiescence). however, the net production of progesterone was significantly higher on day 5 (p less than 0 x 05) than at any other stage, and we suggest that the corpus luteum is the main source of the rise in progesterone in the peripheral circulation at days 5-8 of the dela ... | 1983 | 6822975 |
| hormonal changes at oestrus, parturition and post-partum oestrus in the tammar wallaby (macropus eugenii). | concentrations of progesterone, prolactin, lh and 13,14 dihydro-15-keto-prostaglandin f2 alpha (pgfm) were measured in plasma of eight tammar wallabies at 8-hourly intervals during the end of pregnancy and post-partum oestrus initiated by removing the pouch young, and during the end of the oestrous cycle, similarly initiated. in the non-pregnant cycle oestrus occurred 29.7 +/- 0.7 (mean +/- s.e.m.) days after initiation of the cycle, was preceded by a slow decline in progesterone concentration f ... | 1983 | 6822779 |
| qualitative and quantitative changes in milk fat during lactation in the tammar wallaby (macropus eugenii). | there are major quantitative and qualitative changes in the milk lipids during lactation in the tammar wallaby, macropus eugenii. the crude lipid content of the milk is relatively low during the first 10 weeks of lactation; between 10 and 26 weeks post partum the lipid content increases gradually but after that it increases rapidly. the triglyceride fraction of the lipid at early stages of lactation contains a large amount of palmitic acid and relatively little oleic acid whereas mature milk exh ... | 1983 | 6675645 |
| structure of the pars distalis in pouch-young tammar wallabies (macropus eugenii). | the pars distalis of pouch-young wallabies (macropus eugenii) aged 1 to 50 days was studied by means of light-microscopic immunohistochemistry and electron microscopy. in the pars distalis of these pouch-young presumptive somatotrops, which constituted up to 70% of the gland, and nongranulated cells were the most numerous cell types. small numbers (together representing less than 30% of the pars distalis) of immunoreactive mammotrops, thyrotrops, gonadotrops and corticotrops were also found. the ... | 1983 | 6342804 |
| structure of the pars distalis in the adult tammar wallaby (macropus eugenii). | an immunohistochemical, light- and electron-microscopial study was made of the pars distalis in adult tammar wallabies (macropus eugenii). the pars distalis of this marsupial mammal was divided into three regions, based on the distribution of cell types within the gland. somatotropic, mammotropic, luteotropic, folliculotropic, corticotropic and thyrotropic cells were identified on the basis of their immunohistochemistry, cytology and ultrastructure. non-granulated (folliculo-stellate) cells, ide ... | 1983 | 6299571 |
| oestradiol in follicular fluid and in utero-ovarian venous and peripheral plasma during parturition and postpartum oestrus in the tammar, macropus eugenii. | oestradiol-17 beta was measured in plasma and follicular fluid by a radioimmunoassay validated for the tammar. plasma was sampled from the peripheral circulation and both utero-ovarian veins to assess the contribution of oestradiol from the corpus luteum in one ovary and from the graafian follicle in the other during late pregnancy, parturition, post-partum oestrus and ovulation. concentrations of oestradiol in the peripheral plasma and in the vein draining the cl remained less than 5 pg/ml on a ... | 1984 | 6512777 |
| postnatal development of primary visual projections in the tammar wallaby (macropus eugenii). | the time course and pattern of retinal innervation of primary visual areas was traced in pouch-young wallabies. tritiated proline was injected into one eye of animals ranging in age from 1 to 72 days after birth. these results are compared to the 11 primary visual areas found in the adult wallaby, seven of which receive binocular input while four are monocular. at birth retinal ganglion cell axons have not reached any visual areas. two to 4 days after birth, all of the axons are crossing to the ... | 1984 | 6490967 |
| concentrations of oestradiol-17 beta in plasma and corpora lutea throughout pregnancy in the tammar, macropus eugenii. | oestradiol-17 beta concentrations were measured by radioimmunoassay in peripheral blood samples from 10 tammar wallabies after their pouch young were removed to terminate embryonic diapause. oestradiol concentrations rose from 8.3 +/- 1.2 pg/ml on days 3 and 4 to peak of 15.8 +/- 2.9 pg/ml on day 5, coincident with an increase in 'progesterone' concentrations, and then fell to 10.5 +/- 2.7 pg/ml on day 7. no changes in oestradiol concentrations were associated with parturition. five females came ... | 1984 | 6471052 |
| effects of progesterone on parturition in the tammar, macropus eugenii. | tammar wallabies were treated with progesterone injections or implants during late pregnancy to determine whether progesterone withdrawal was essential for parturition. neither physiological (implanted group) nor pharmacological (injected group) levels of circulating progesterone prevented parturition occurring at about the expected time in about two-thirds of animals that were pregnant. the neonates of both groups were normal in size and weight, but about a third of treated pregnant animals ret ... | 1984 | 6471050 |
| mammogenesis and changing prolactin receptor concentrations in the mammary glands of the tammar wallaby (macropus eugenii). | all 4 mammary glands of the tammar wallaby showed a steady increase in weight and prolactin receptor concentration during the luteal phase of the oestrous cycle to reach a peak at oestrus. removal of the corpus luteum abolished this mammogenesis , while pregnancy, which in this species is a day or so shorter than the oestrous cycle, had no effect. this provides an explanation for the previous finding that pregnancy is not a necessary pre-requisite for lactation in marsupials and that nonpregnant ... | 1984 | 6327974 |
| ovarian steroid metabolism and oestrogens in the corpus luteum of the tammar wallaby. | ovaries were obtained from tammar wallabies at various stages of the reproductive cycle to examine the occurrence of oestrogens in corpora lutea, and the synthesis and metabolism of steroids in the corpus luteum and ovarian cortical and interstitial tissues. corpora lutea contained oestradiol-17 beta and oestrone during embryonic diapause and at all stages of pregnancy studied after blastocyst activation. aryl sulphatase, 3 beta-hydroxysteroid dehydrogenase and 17 beta-oxidoreductase were shown ... | 1984 | 6232334 |
| seasonal patterns of circulating progesterone and prolactin and response to bromocriptine in the female tammar macropus eugenii. | concentrations of prolactin and progesterone in the plasma of female tammars (macropus eugenii) were measured during lactational quiescence and seasonal quiescence and during the period of natural resumption of reproduction after the summer solstice in december. prolactin concentrations were consistently low (less than 40 ng/ml) during the period of declining day length and consistently elevated (greater than 40 ng/ml) during the period of increasing day length. basal levels of progesterone were ... | 1984 | 6714652 |
| ribosomal gene reiteration in a marsupial species with an x-linked nucleolar organizer. | the number of ribosomal cistrons in somatic cells of males and females of macropus eugenii have been estimated using rna/dna hybridization in 70% (v/v) formamide. the male has one x-linked active nucleolar organizer and the female two and while the number of ribosomal cistrons is variable between the four males examined (31-65 copies), it is substantially less than the number present in the three females (94-103 copies). there is, therefore, no evidence of dosage compensation by amplification. | 1984 | 6525112 |
| ultrastructure of the epididymis of the tammar, macropus eugenii, and its relationship to sperm maturation. | the ductus epididymidis of the tammar is lined by an epithelium composed of principal, mitochondria-rich, apical and basal cells, and intraepithelial leucocytes. the epithelium is structurally differentiated into 6 zones referred to as the initial segment, middle segment (3 subdivisions) and terminal segment (2 subdivisions). the occurrence of the initial, middle and terminal segments corresponds quite closely to the anatomical differentiation of the epididymis into a head, body and tail. the in ... | 1984 | 6488287 |