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15 Cards in this Set
- Front
- Back
Marsupials
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~270 spp
200 in austrilasia, 70 in S america Ancient Diverse (in body form and ecology) Classif. by teeth and feet Repro diff than eutheria |
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Types of Marsupials
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Hugh Tyndale-Biscoe’s treatment:
* Predatory marsupials (Thylacinidae, Dasyuridae, Notoryctidae) * Bandicoots (Peramelidae) * Pollen eaters, sap suckers (honey & feather-tailed & pigmy possums and sugar gliders, Tarsipedidae, Acrobatidae, Burramyidae and Petauridae) * Folivores(koala, greater glider & possums) * Wombats * Kangaroos (Potoroidae and Macropodidae) |
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Kangaroos
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Diprotodonts
Syndactylous feet (fused digets) Macropods (big feet) |
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Family Macropodidae
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* Hare Wallabies (Lagorchestesspp.)
5 species. Extinct or severely reduced. * Nailtail Wallabies (Onychogaleaspp.) 3 species. 1 extinct * Rock Wallabies (Petrogalespp.) 11 species. Severe range reductions, none extinct yet, some status uncertain * Padymelons (Thylogalespp.) 3 species. Mostly common or abundant, 1 species extinct on mainland, 1 often abundant (pest, even) * Typical wallabies, wallaroos and kangaroos (Macropusspp.) 14 species. 1 extinct. Rest varied, some very reduced, some very abundant. Grey and Red Kangaroos are very abundant. * Others: Tree kangaroos (2 species, threatened), Quokka (vulnerable), Swamp Wallaby (doing okay). ** Pastoral use ** FOXES ** rabbits reduce amy of grass and increase erosion |
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Macropods
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Grazers and Browsers
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Bridled nailtail Wallaby
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Onychogalea fraenata
Nail on their tail |
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Brushtailed Rock Wallaby
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Petrogale penicillata
West of Brisbane Reduced, some doing well |
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Yellow-footed Rock-Wallaby
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Petrogale xanthopus
Huge feet Very Agile |
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Red Kangaroo
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Huge musckes
Competition with males Can be taller than a human standing up |
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Parma Wallaby
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Macropus parma
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Matchie's Tree Kangaroo
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Drndroladus matchiei
in PNG |
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Digesetion
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Forestomach (2 parts of stomach)
Fermentation vat Bacteria digests the food and these biproducts are nutrients for the K Can find grass in their stomachs where there is no grass |
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Thermoregulation
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Winter --> sun
Summer --> shade Coat deflects heat Lick thier paws to that it evaporates and divert cool blood into body |
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Bipedality and Energenics
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Can move rapidly with stored energy in tail or legs from muscles
When moving slow- (move with tail) as they increase speed, their 02 requirements increase. Fast- (hopping) doesnt increase 02 requirements. Length of hop increases, velocity Increases but 02 req dont increase *can swim! |
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REPRODUCTION
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Young are born early and go into pouch.
Males- tested are anterior to penis, bifid penis Females- Lateral vaginae, uteri, Fallopian tubes, ovaries, median vagina. Embryonic diapause (arrested the development of blastocyst in useris (70-100 cells)) around 204 days Short gestation ~34 days (then climbs into pouch) Long extrauterine development Pregnancy does not inhibit osetrus. BUT lactation does |