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CANE TOADS - Kakadu national park - Coggle Diagram
CANE TOADS - Kakadu national park
Natural Selection
Cane toad
effect on other species
toxic glands
Behaviour features – thrive in AU
• Feed mainly at night
• Ground dwellers
• Eat insects, snails, pet food left out, anything that first in mouth – frogs, birds, small mammals and reptiles
• No known predators
• Breed all year round
• Females lay 30 000 eggs at a time – takes 2-3 days to hatch
• Contain toxins that kill Australian wildlife – bufotoxin
improved hopping style
faster invasion
distribution AUS
Predators
Red belly black snake
smaller heads
cannot eat larger toads
smaller toads = less toxins
black kites
attack belly - no toxins
whistle kites
attack belly - no toxins
rukal water rat
keelback snake
• Keelback ancestors were recent snakes to arrive to Australia, having evolved in Asia – similar poisonous toxins were found in Asia
• Keelback Snake has the evolutionary advantage of being 'pre-adapted' to life with toads.
found to eat the small cane toads - eventually discovered to eat medium size toads (varsp)
distribution in Australia
preserve species
o Relocating native species
o Lung worms to kill baby toads – 30%
o High stress on bodies
question 3
biotic factors
not many natural predators resulting in no decline in cane toad population
reproduce quickly
abundance of food - eat anything
abiotic factors
temperature
optimal temp for cane toads - 5-37 degrees
rich soils
river and lake systems
harmed if skin comes to contact
biomes and ecosystem
wetlands/floodplains
fit for amphibians - cane toad
wet conditions
woodlands and lowlands
coastal and riverine floodplains to lowland hills -tidal flats, floodplains, lowlands and plateaux,
tropical monsoonal climate - wet and dry seasons
question 1