Whitney Wininger
Mr. Johnson
Block B
14 December 2014
Case Study Summative - Criterion A and D Vulpes vulpes or more commonly known as the European Red Fox is an invasive species in Australia along with other countries. The common Red Fox is approximately 1000 mm long from its head to its tail, the Red Fox can weigh up to 8.3 kg. (Issg Database) The Red Fox however is not entirely red. Its throat, abdomen and the tip of its tail is white, while is legs and ears are black, the back of this animals is red, therefore because of the color of its back it gets the name Red Fox. (Issg Database) The Red Fox was originally from many countries in Europe, but were introduced to Australia in 1845. (Kingdom: Animalia) Red Foxes were first brought to Australia for sport hunting purposes, but no one could have predicted the damage that there animals would cause to the environment in the future. (Kingdom:
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The foxes are thought of to be responsible for the killing off most of the ground living animals in the last 130 years. (Red Fox) Any animal that is smaller that 5.5 kilograms is prey to the foxes, a single fox is estimated to eat about 400 grams each night. (Red Fox) Sometimes a fox will kill many animals during the night but not eat all of them, this can lead to serious food shortage for other native animals. I single fox can kill thousands of mammals, reptiles and birds every year. (Red Fox) Red Foxes are constantly is competition with other native animals on Australia, the more they eat the less food there is for the native animals. Sense there is no known natural predator in Australia for the Red Foxes, human containment or natural death are the only ways to keep these animals at a steady number. If the government fails to keep a handle on the population of this animals there is no telling what kind of effects the over population will have the environment and the other animals in
Also ranchers brought in pigs which gave Goldens more prey. After the Goldens took over the area, the foxes started to decline because the Golden Eagles preyed upon the foxes. The foxes then died of diseases from dogs.
Last, the farmers and ranchers whose cattle land has been invaded by the prairie dogs are eradicating them. Although the loss of prairie dogs is the main logic behind the endangerment of the black-footed ferrets, a few other factors contribute as well. As well as most small animals, black-footed ferrets are prey.
Sixty years after the extirpation of wolves in the Northern Rockies and Great Plains of America, biologist and ecologist in Yellowstone National Park reintroduced wolves into a declining ecosystem that once thrived during their presence. The reintroduction brought immense controversy into the West and continues to stir outrage among anti-wolf groups. These anti-wolf supporters argue wolves are ruthless predators that cause destruction to natural environments and livestock. Conversely wolf advocates and scientists suggest that wolves are a keystone species that are essential to the natural regulation of our Western ecosystems. Although pro and anti-wolf advocates can agree that wolves have an effect on livestock, ungulate populations and ecosystems,
Question 1 and mini-questions Who is Charlie Teo? https://www.curebraincancer.org.au/page/58/charlie-teo Charlie Teo is a Prof in brain surgery. He was the first person who discovered brain cancer.
It was once a "top dog" in the borderlands. They eat large and small mammals like deer, elk and rabbits. After being wiped out in the U.S. and only a few animals were remaining in Mexico. They were reintroduced to the wild in Arizona 1998. There are only about 300 Mexican wolves in total.
This meant that in the population there were already ten different color of prey that occurred naturally. However, when the environment was a blue background with colorful flowers and butterflies, many of the different colored prey had gone extinct and the red prey had the highest number of survivors. Also, environment two was pink, white, and black plaid and the prey that had the most number of survivors in that environment was white. This demonstrates that depending on the environment, different variations of a trait would be successful. It also demonstrates that the adaptations in this experiment depended on the environments.
Focus question: To cull or not to cull great white sharks Great white sharks are the biggest predatory fish in the ocean and they can grow to about 15 feet in size, although larger than 20 feet have been seen. Their name comes from the white underbellies of the sharks and their bodies are designed to blend in with the seabed. The great whites have powerful tails which makes them excellent swimmers that can travel up to 24 km/h. They have many rows of triangular shaped teeth and have a great sense of smell and even their body can sense electromagnetic fields produced by animals. They mainly eat sea lions, small toothed whales and sea turtles.
Some migrants bring diseases to Australia, smallpox ECT The European immigrants that came under the white Australia policy came from Italy, France, Ireland, Spain, Holland, Germany, Suedan, Greece, Lithuania, Estonia, and Lattua. The snowy mountain scheme, this was a extremely large engineering scheme designed to produce hydro-electricity and water for immigration. Many European immigrants worked on this scheme.
What Is Wolf Reintroduction? This is a system to reintroduce wolves in their natural surroundings like woodlands and national parks. Reintroduction of wolves may be done in zones where there is sufficient space for jeopardized wolves to populate and support themselves.
A massive fish came soaring out of the water and crashed into your jaw as you were powerboating by the Great Lakes. Was it a shark, or the lochness monster? Nope, it was an one-hundred pound Asian Carp. Asian Carp are examples of Invasive species. Exotic invasive species share many commonalities amongst each other in their extreme ability to arrive, survive, and thrive.
Wolves are getting less and less fearful of humans and are moving closer to towns. The debate about killing wolves has been controversial a lot in the past couple of years. Although many citizens don’t want the wolves to be killed because, there isn’t a tremendous amount of them and they were almost extinct in 1930(Zhang). There is many farmers that need the wolf population to be regulated because the
The reason they can withstand this killing is because they breed quickly. Statistics like these are something that catches a reader’s eye. This is something that, I think, “Scared to Death” by Ed Yong lacked. In “Scared to Death”, it talks about “Landscape of Fear”; and how animals react to this.
As international movements increase, risks spread. Some non-native species are not obviously detrimental on introduction, but become so in the future and intensive monitoring is required. Negative invasive species can compete and overcome native species in 6 ways. 1. Competition: Food sources and habitat reduced for native species.
The Silver Fox Industry on PEI The reign of the silver fox fur industry in PEI lasted from 1900 to 1950. Fur farming is the practice of breeding or raising certain types of animals for their fur. The more rare the fur colour, the more expensive it was. The fur industry typically involves the capture of wild animals that are put in captivity and breed until the desired “look” for the offspring is obtained and once there is a sufficient number of this type of animal they are killed and sold for their pelts.
Poaching and illegal hunting can cause an off set in the ecosystem by overhunting animals. When one animal population decline drastically, other organisms are affected too. The decline in native predators is the main cause for overpopulation of animals like deer. Deer overpopulation has led to rapid decrease vegetation life causing other animals to be put at risk. Removing predators from the food web disrupts the entire balance of an