1. The document discusses several invasive species that have negatively impacted Oceania, specifically Australia. It describes rabbits, sea toads, and crazy ants. 2. Rabbits were introduced to Australia in 1788 and by 1920 their population had exploded to an estimated 10 billion, causing significant environmental damage. Efforts to control them, such as constructing rabbit-proof fences, largely failed. 3. Sea toads were introduced in 1935 to control sugarcane pests but could not climb the plants. They have since established an estimated population of 200 million in just 80 years due to their high reproductive rates and lack of natural predators in Australia. 4. Crazy ants were accidentally introduced to Northern Australia and have become

1. Invasion Biology 7th March, 2019
Group
members
1
2
3
3 Noor Fatima
Muhammad Asghar Hassan
Guowei Gao
Delin Kang

2. Oceania, The Smallest Continent Of The World; After
Antarctica
N
EW
S
Area: 8,525,989 Square kilometers
population of 40 million
Asia Pacific

3. All Countries of Oceania

4. Management Of Invasive Species
• Invasive species are animals, plants, parasites or
disease causing organisms that establish outside their
natural range and become pests.
What Are Invasive Species?
 Conventional Control Methods  Trapping, Poisoning, Shooting
 Biological Control Methods
 Natural predators, parasites and disease-
carrying bacteria or viruses.

5. Number of Invasive Species to Oceania

6. BUNNY
(RABBIT)
INVASIVE SPECIES

7. AUSTRALIA'S BATTLE WITH THE BUNNY
• They may look cute and cuddly but rabbits have been a persistent
pest in Australia for 150 years.
• Origin：Rabbits were introduced to Australia by the First Fleet in 1788.
They also were bred as food animals, probably in cages. But a person
named Thomas Austin, 1859, who released 24 wild rabbits from England
for hunting purpose.
• Current status: This is really a Pandora's box. By 1920 it is thought
there were 10 billion rabbits in Australia. The population is currently
estimated to be 200 million.
From ABC News

8. CONTROL
To prevent the rabbits' westward spread, the
government finished building three rabbit-proof
fences across the state in 1907. Unfortunately the
fences were a flop because rabbits had already
moved into the areas being fenced off.
Now we can’t image how many rabbit in
Australia . But Australia begin to use military
measures to slay rabbit.

9. INVASIVE SPECIES
SEA TOADS

10. Origin: Sea toads are native to the Americas.
 In 1935, toads were introduced into Australia to control a local pest
(Dermolepida albohirtum) that seriously affected sugarcane production
 After introduction, toads could not climb up sugarcane to eat pests.
CURRENT STATUS: In just 80 years, the number of toads in Australia
has surged from 80 to 200 million.
 Recently, it has been found that Australian dogs like to eat sea toads, and
there are often some poisoning phenomena.
Main reasons for the overflow of toads are as follows：
 It has super reproductive capacity and can produce 8,000-25,000 eggs at a
time.
 Toad is toxic, lacks natural enemies and predators can poison themselves and
die after feeding.
Natural Habitat
Invaded Area
From ABC News

11. INVASIVE SPECIES
CRAZY ANTS

12.  Introduced accidentally to
Northern AUSTRALIA