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"Marsupials"
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Super marsupials : kangaroos, koalas, wombats, and more
Introduces readers to marsupials, a type of animal that carries their young in pouches.
Book
Correction: Molecular characterization and multi-locus genotypes of Enterocytozoon bieneusi from captive red kangaroos (Macropus Rfus) in Jiangsu province, China
[This corrects the article DOI: 10.1371/journal.pone.0183249.].
Journal Article
Kangaroos
\"In this colorful, photo-packed picture book for preschoolers, curious kids learn all about kangaroos and watch a kangaroo joey as it grows from a tiny baby in its mother's pouch into a big, fast-hopping marsupial. Readers learn all about these marvelous marsupials, including where they live in Australia, what they eat, and how they communicate, play, and grow. Kids will meet red kangaroos, gray kangaroos, tree kangaroos, rat kangaroos, and other members of the kangaroo family. A habitat map shows where kangaroos live\"-- Provided by publisher.
Book
Embryo implantation evolved from an ancestral inflammatory attachment reaction
The molecular changes that support implantation in eutherian mammals are necessary to establish pregnancy. In marsupials, pregnancy is relatively short, and although a placenta does form, it is present for only a few days before parturition. However, morphological changes in the uterus of marsupials at term mimic those that occur during implantation in humans and mice. We investigated the molecular similarity between term pregnancy in the marsupials and implantation in eutherian mammals using the gray short-tailed opossum (Monodelphis domestica) as a model. Transcriptomic analysis shows that term pregnancy in the opossum is characterized by an inflammatory response consistent with implantation in humans and mice. This immune response is temporally correlated with the loss of the eggshell, and we used immunohistochemistry to report that this reaction occurs at the materno–fetal interface. We demonstrate that key markers of implantation, including Heparin binding EGF-like growth factor and Mucin 1, exhibit expression and localization profiles consistent with the pattern observed during implantation in eutherian mammals. Finally, we show that there are transcriptome-wide similarities between the opossum attachment reaction and implantation in rabbits and humans. Our data suggest that the implantation reaction that occurs in eutherians is derived from an attachment reaction in the ancestral therian mammal which, in the opossum, leads directly to parturition. Finally, we argue that the ability to shift from an inflammatory attachment reaction to a noninflammatory period of pregnancy was a key innovation in eutherian mammals that allowed an extended period of intimate placentation.
Journal Article
Context Learning in the Marsupial ( Lutreolina Crassicaudata Red Opossum )
Context learning was studied in the Red Opossum, the marsupial, Lutreolina crassicaudata . In Experiment 1 the animals received four trials per day in two different boxes (contexts): X and Y. Half of the animals received periodic deliveries of a sugar solution ( + ) in one box (X+), but not in the other (Y-); the rest received the opposite training (X-), (Y+). Several behavioral categories were recorded during the final trial in each context. Animals approached the feeder significantly more in the positive context. Experiment 2 was designed to determine the extent to which the number of trials per day affected acquisition. Two groups of animals received differential training with either four or one trial per day. No differences between groups were observed, although in both of them, approach to the feeder was significantly higher in the positive context. The results are discussed in relation to both the role of practice distribution on learning in marsupials, and their potential value of this species for the study of learning processes.
Journal Article