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16 Cards in this Set

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Pleurodira
*side-necked turtles
*southern hemisphere
*dominant freshwater spp in australia
*fold neck to side under shell for protection
Cryptodira
*neck folds in mid-sagittal plane in head retraction
*sea turtles, freshwater turtles, land tortises
Australian Cryptodira
no land tortises in Australia
Pig-nosed turtle- only freshwater spp
6 sea turtles
green, loggerhead, hawksbill, leatherback, Pacific ridley
Pig-nosed turtle
Carettochelys insculpta
Recent arrival from Papua New Guinea
Lives in streams in wet-dry tropics
Builds nest and lays eggs during dry season
Nest in sand banks on edge of rivers
Embryos aestivate inside eggshell at the end of incubation and explosively hatch when sand bank is flooded
Omnivorous- fruit and seeds. ribbon weed and other aquatic plants
Sex determined by incubation temperature
Australian Pleurodira Turtles
Ancient gondwana origion- affliliated w/ Samerica spp
~25spp recognized
7 long necked spp- genus Chelodina
18 short necked spp
4 Elseya lastiternum
5 Elseya dentata
5 Emydura species
1 Pseudemydura
1 Elusor spp
1 Rheodytes
All are carnivores as hatchlings
Opputrunistic omnivores as adults
Chelodina-predators
Elseya- herbivores
all spp- GENETIC SEX determination
clutch- 10 to 30
all females larger NOT western swap and Mary River turtle
Incubation Strategies of Australian Pleurodira Turtles
Nest after rain during breeding season
Temperate climate spp- nest furing spring/summer
Wet/dry tropics- nest during dry season
Genus Emydura
most numerous group along east coast of australia
medium sized- 2-3kg, 25-35cm
Swamps, lakes rivers creeks
Oppurtunistic, thrive in tertiary waste treatment ponds
Spring/summer nester
Brisbane River Turtle
Emydura signata
Most common spp in Uni lakes
Frequently basks
-thermoregulatory?
-anti microbial?
-vitamin D?
Spring sumer nester
Can have more than 1 clutch in a breeding season
8-31 eggs, 5-11g
two dif females, same clutch mass but package eggs diff
10/10g eggs vs 50x5g eggs
Western Swamp turte
Pseudoemydura umbrina
RAREST turtle 100 living speciments
in 200ha wetland near perth
wetland-dry a lot: aestivate and carniverous
Females dig nest with front feet
in Zoo- ~15cm
*Australia's RAREST TURTLE
Fitzroy river turtle
Rheodytes leukops
Fitzroy river catchment
*well developed cloacal bursae--> gill, get o2 from water 'bum breather'
In well oxygenated water ways
can dive 6-8 hrs
Colaca is ventilated- accnt 50% O2 in moderate activinty and 100% in low activity
Large surface area and capilaries close to surface
*Distinctive WHITE EYES
* feeds on invertabrates, esp insect larvae found in shallow water ripple zones btwn pools at night
Mary River Turtle
*Mary River catchment
*large, 5-7kg 30-4-cm
*large tail laterally compressed
*Cloacal ventilator (bum breather)
*Omniverous, ribbon weed, bivalve mollusks
*spring/summer nester
*Males LARGER than females
saw-shelled snapping turtles
*Genus Elseya
*Larger spp are herbivorous as adults
*bum breathers
Southern Snapping turtle
Elseya albagula
*from mary and Burnetter river catchmeny
*large females 5-8kg LARGER than males 3-5 kg
*Herbiverous as adults, ribbon weed, grass, roots, fruits and flowers
*bum breathers
*nests autum/winter eggs diapause at early stage
*heavy nest predation
Genus Chelodina
Long necked turtles
7spp
highly carniverous
specialist sit and wait predators
*SUCTION FEEDING ACTION- water and prey drawn into mouth and pharyngeal cavity
Northern Long-necked turtle
C. Rugosa
*wet dry tropics
*aestivates in mud when swamps dry out
Constructs a nest and lats eggs in anoxic mud at the bottom of the swamp in the wet season- only UNDERWATER nesting reptile
*eggs diapause while underwater. when swamp dries out 02 increases as mud dries, rise in 02 breaks diapause and embryos begin to develop
*in N Australia
Broad shelled river turtle
C. Expansa
Lays eggs in autum/winter when soil temp is dropping (weird)
*embryos begin to develop but enter a secondary diapause early in development
*warming of soil in spring/summer breaks diapause and development continues
*slow development- takes over a year in Victoria