Parasitism Definition and Examples

Parasitism is defined as a relationship between two species in which one organism (parasite) lives on or within the other organism (host), causing the host some degree of harm. A parasite reduces its hosts fitness but increases its own fitness, usually by gaining food and shelter. Key Takeaways: Parasitism Parasitism is a type of symbiotic relationship in which one organism benefits at the expense of another.The species that benefits is called the parasite, while the one that is harmed is called the host.Over half of all known species are parasites. Parasites are found in all biological kingdoms.Examples of human parasites include roundworms, leeches, ticks, lice, and mites. The term parasite comes from the Greek word parasitos, which means one who eats at the table of another. The study of parasites and parasitism is called parasitology. There are parasites belonging to every biological kingdom (animals, plants, fungi, protozoa, bacteria, viruses). In the animal kingdom, every parasite has a free-living counterpart. Examples of parasites include mosquitoes, mistletoe, roundworms, all viruses, ticks, and the protozoan that causes malaria. Parasitism vs. Predation Both parasites and predators rely on another organism for one or more resources, but they have numerous differences. Predators kill their prey in order to consume it. As a result, predators tend to be physically larger and/or stronger than their prey. Parasites, on the other hand, tend to be much smaller than their host and do not normally kill the host. Instead, a parasite lives on or within the host for a period of time. Parasites also tend to reproduce much more quickly than hosts, which is not usually the case in predator-prey relationships. Parasitism vs. Mutualism vs. Commensalism Parasitism, mutualism, and commensalism are three types of symbiotic relationships between organisms. In parasitism, one species benefits at the expense of the other. In mutualism, both species benefit from the interaction. In commensalism, one species benefits, while the other is neither harmed nor helped. Types of Parasitism There are multiple ways to classify types of parasitism. Parasites may be grouped according to where they live. Ectoparasites, such as fleas and ticks, live on the surface of a host. Endoparasites, such as intestinal worms and protozoa in blood, live inside a hosts body. Mesoparasites, such as some copepods, enter the opening of a host body and partially embed themselves. The human head louse is a directly-transmitted obligate ectoparasite. SCIEPRO / Getty Images The life cycle can be a basis for classifying parasites. An obligate parasite requires a host in order to complete its life cycle. A facultative parasite can complete its life cycle without a host. Sometimes location and life cycle requirements may be combined. For example, there are obligate intracellular parasites and facultative intestinal parasites. Parasites may be classified according to their strategy. There are six major parasite strategies. Three relate to parasite transmission: Directly transmitted parasites, such as fleas and mites, reach their host on their own.Trophically transmitted parasites, such as trematodes and roundworms, are eaten by their host.Vector transmitted parasites rely on an intermediate host to transport them to their definitive host. An example of a vector transmitted parasite is the protozoan that causes sleeping sickness (Trypanosoma), which is transported by biting insects. The other three strategies involve the parasites effect on its host: Parasitic castrators either partly or fully inhibit a hosts reproductive ability but allow the organism to live. The energy the host would have put toward reproduction is diverted toward supporting the parasite. An example is the barnacle Sacculina, which degenerates the gonads of crabs such that males develop the appearance of females.Parasitoids eventually kill their hosts, making them nearly predators. All examples of parasitoids are insects that lay their eggs on or inside the host. When the egg hatches, the developing juvenile serves as food and shelter.A micropredator attacks more than one host so that most host organisms survive. Examples of micropredators include vampire bats, lampreys, fleas, leeches, and ticks. Other types of parasitism include brood parasitism, where a host raises the young of the parasite (e.g., cuckoos); kleptoparasitism, in which a parasite steals the hosts food (e.g., skuas stealing food from other birds); and sexual parasitism, in which males rely on females for survival (e.g., anglerfish). The banded caterpillar parasite wasp uses its long ovipositor to lay eggs inside its host. Louise Docker Sydney Australia / Getty Images Why We Need Parasites Parasites harm their hosts, so its tempting to think they should be eradicated. Yet, at least half of all known species are parasitic. Parasites serve an important role in an ecosystem. They help control dominant species, allowing for competition and diversity. Parasites transfer genetic material between species, serving a role in evolution. In general, the presence of parasites is a positive indication of ecosystem health. Sources ASP (Australian Society of Parasitology Inc.) and the ARC/NHMRC (Australian Research Council/National Health and Medical Research Council) Research Network for Parasitology (2010). Overview of Parasitology. ISBN 978-1-8649999-1-4.Combes, Claude (2005). The Art of Being a Parasite. The University of Chicago Press. ISBN 978-0-226-11438-5.Godfrey, Stephanie S. (2013). Networks and the Ecology of Parasite Transmission: A Framework for Wildlife Parasitology. Wildlife. 2: 235–245. doi:10.1016/j.ijppaw.2013.09.001Poulin, Robert (2007). Evolutionary Ecology of Parasites. Princeton University Press. ISBN 978-0-691-12085-0.

An Imbalance Between Rich And Poor Is The Oldest And Most...

â€Å"An imbalance between rich and poor is the oldest and most fatal ailment of all republics.† – Plutarch, Greek historian Currently in the United States, there are over 16 million children growing up in poverty. Children that live in poverty are more likely to be absent from school and have a higher dropout rate than those who come from families with higher incomes. Children that live beneath the poverty line are more likely to have learning disabilities, developmental delays, and behavioral problems. These are just a few disadvantages of the hundreds that children living in poverty deal with on a day to day basis. There are ways to help these children in poverty, that is the extension of the American Recovery and Reinvestment Act (ARRA) of 2009 improvements to the Child Tax Credit and the Earned Income Tax Credit. The extension of this effective policy will ensure that parents and caregivers have the resources to support and nurture their children. The United States fell into a recession in December 2007 and it was the greatest economic crisis since the Great Depression. The American Recovery and Reinvestment Act was designed to help the economy recover and get out of the recession. ARRA was specifically designed to help American families and small businesses. The plan for this act was to redirect $260 billion in federal funding through unemployment benefits, tax cuts and tax credits. The American Recovery and Reinvestment Act was very successful and ended the recessionShow MoreRelatedHow to Get the Poor Off Our Conscience2331 Words   |  10 PagesHow to Get the Poor off Our Conscience John Kenneth Galbraith I would like to reflect on one of the oldest of human exercises, the process by which over the years, and indeed over the centuries, we have undertaken to get the poor off our conscience. Rich and poor have lived together, always uncomfortably and sometimes perilously, since the beginning of time. Plutarch was led to say: â€Å"An imbalance between the rich and poor is the oldest and most fatal ailment of republics.† And the problems thatRead MoreThe Usefulness of the Sociological Imagination  in Relation to Gender, Social Inequality and Suicide1766 Words   |  8 Pagesusefulness of sociological imagination in relation to gender, social inequality and suicide. Seeing the world sociologically also makes us aware of the importance of gender. Gender refers to the social aspects of differences and hierarchies between male and female. Every society attaches meanings to gender, giving woman and men different kind of work, responsibilities and dress codes. We tend to think that becoming a man or becoming women is a biological destiny. But sociological imaginationRead MoreThe Outsiders: Effects of Social Class1857 Words   |  8 PagesSocial class describes the different layers that exist in society. These layers, or classes in society, are a division that civilization has been running on ever since the beginning of mankind. In most modern societies, our system of social class division is one of opportunity. We experience a good deal of social mobility, where people through generations or in their own lifetime can move up or down the social scale. By examining the many different perceptions of social class along with S.E.

The Alli Weight Loss Advertisement Free Essays

Alli Weight Loss Plan Advertisement The â€Å"Alli Weight Loss Plan† advertisement in the January 18th 2010 issue of People magazine is effective because of the informational packed two-page spread, the vibrant multicolored picture, and the way the bold banner intertwines with the emotion in the picture. The â€Å"Alli Weight Loss Plan† advertisement is effective because of the informational packed two paged spread. The first page has six separate informative blocks, with breaks in between the different blocks, to give the reader a chance to interpret the information. We will write a custom essay sample on The Alli Weight Loss Advertisement or any similar topic only for you Order Now The second page is completely covered in a vibrant colorful picture. Consequently, Attention is drawn to reading the six separate topics and viewing the colorful picture. The â€Å"Alli Weight Loss Plan† advertisement contains six informational blocks, each with different brilliant colored titles. Topics the advertisement covers consist of educational information, nutritional information, and governmental information. The first block written in red is titled, â€Å"you and food. The first block covers the relationship between the reader and food, whether or not that relationship is healthy. The first block also entices the reader and relates to the potential consumer, identifying the problem and offering them a solution. The second block is titled, â€Å"real hunger†, in green and describes symptoms of real hunger. Examples from the second block are: real hunger â€Å"grows gradually†, real hunger is when â€Å"you’ll eat anything†, and real hunger is when â€Å"you feel good after eating. The third block is titled â€Å"emotional hunger†, and is colored blue. The third block describes signs of emotional hunger; one example is: emotional hunger is when â€Å"you feel guilty after eating. † The fourth block is titled â€Å"you can eat healthier for life†, and is colored red. The fourth block explains that the Alli Weight Loss Plan can help learn the healthy way to eat and to lose weight. The fifth block is titled â€Å"you can lose weight without losing your love for food†, and is colored green. The fifth block describes how Alli Weight Loss Plan works to boost weight loss. The advertisement emphasizes that consumers taking Alli can still enjoy their favorite foods just in smaller portions. The final block is colored in yellow and is titled â€Å"you can lose weight easier with support. † The sixth block explains how Alli Weight Loss Plan users will be able to have personalized weight plans made for them on myali. com. There is also a small sub topic that states Alli is FDA- approved, which assures readers that the Alli Weight Loss Plan is safe and legitimate. All six blocks provide readers with plentiful amounts of educational, nutritional, and governmental information about the Alli Weight Loss Plan that helps readers decide if the product is for them. The second page of the Alli Weight Loss Plan advertisement is a vividly bright picture of a late twenties to early thirties brunette woman grocery shopping. The young lady has her head thrown way back and has a confident smile on her face. The young lady is pushing a grocery cart bursting at the seams with healthy foods, such as huge succulent pineapple. The background is blurred on the intense, colorful picture, but can still be interpreted as a grocery isle of a grocery store. The second page of the â€Å"Alli Weight Loss Plan† advertisement has an excellent picture, which gives the reader an insight of what the advertisement is about. The bold colorful banner intertwines with the emotion of the vibrant colorful picture. The banner is titled â€Å"eat healthier, live happier. † The vibrant picture shows the exact emotion of the banner. The young lady is extremely happy; she has her head thrown back and has a gigantic smile. The young lady is obviously eating healthy. The writers of the â€Å"Alli Weight Loss Plan† advertisement intertwine the emotion of the picture with the words of the banner, â€Å"eat healthier, live happier. † The â€Å"Alli Weight Loss Plan† Advertisement is directed towards the younger generation of women. Contemporary women are concerned about their appearance and weight. Most young women will do anything to lose weight. The â€Å"Alli Weight Loss Plan† advertisement features a late twenties to mid thirties young lady, who is very satisfied with her appearance. Most readers of People magazine are young women, which is why the â€Å"Alli Weight Loss Plan† advertisement appeals to them so much. Readers want to be as happy as the young lady in the â€Å"Alli Weight Loss Plan† advertisement. Potential customers will be drawn to read the advertisement thoroughly. In conclusion the â€Å"Alli Weight Loss Plan† advertisement is very effective because of the informational packed two-page layout, the vibrant colorful picture, and the way the writers of the advertisement intertwined the picture with the emotion of the banner. How to cite The Alli Weight Loss Advertisement, Essay examples

Meat Industry In Australia Free Samples †MyAssignmenthelp.com

Question: Discuss about the Meat Industry In Australia. Answer: Introduction Australia is widely recognized as one of the worlds largest producers of the commercial livestock and also a leader in the exportation of the red meat. Currently, the countrys off farm meat industry ranges at A$ 17 billion(Meat Livestock Australia Limited, 2016). The meat sector in the country can be further classified into the cattle industry, sheep industry, and the goat industry. The cattle industry in Australia involves 58% of all the agricultural activity(Barbour, et al., 2017). Approximately two hundred thousand people are employed in the red meat industry. Australian Meat Industry Overview Australia is the sixth large consumer of the beef in the world. In the year 2015-2016 meat sector contributed 25 percent of all the agricultural products in the country. In the same year domestic consumption per person averaged 25 kilograms per person. Besides, beef is the second most popular fresh meat consumed in the country after the chicken. In 2016-2017 Australia exported 74 percent of its total beef(Meat Livestock Australia Limited, 2016). The consumption of sheep meat in Australia ranged at $110 billion in the year 2015-2016. Australians are among the highest sheep meat consumers in the world and in the year 2015-2016 alone each person consumed an average of 10.2 kilograms. Apart from domestic consumption, Australia is ranked as the largest exporter of the sheep meat in the world(Meat Livestock Australia Limited, 2016). On the other side, Australians are also goat meat consumers. However, the Australian continent is a small producer of the goat meat but one of the largest goat meat producer. Its two major markets are the Taiwan and the United States. Besides, Taiwan and the United States, Australia can also export its goat meat in China, Pakistan, and Japan. The three countries are the largest goat meat consumers, but they are neither largest importers nor exporters(Limited, 2016). In 2015-2016 the goat meat export amounted to A$258 million. The above data analysis describes the nature of the meat industry in Australia. It also gives the reader some of the potential opportunities that can be available for the meat producers in the country. In the following discussion, this report will use the above data as well as other information from different sources to highlight opportunities and challenges that accrue this sector. Opportunities From the above data, it is clear that Australians are the largest consumers of the beef, mutton and goat meat in the world. Secondly, the country produces the three types of meat in large quantities creating a surplus in that, in turn, is exported to the foreign markets. Therefore, the meat sector in Australia has both domestic market and international market as they major areas where the producers can use opportunities for growth. Diversification of Exports Australian export its meat almost in every corner of the world. Bearing in mind that it faces competition from other meat producing countries it is important for the meat sector to diversify its meat products. The meat producers in Australia can diversify their exports through exporting fresh meat, the canned meat and refrigerated meat. Besides, the producers can also convert meat into other products that can act as supplement of the meat. For example, the producers can dry the meat, grind and pack it into boxes to be exported in the international market. This will increase the companymarketing opportunities in the global arena. Entering into Economic Partnership Agreement with other Countries Australian meat processors through the federal government can benefit from the economic integration with other nations. For example, Japan, China, Malaysia, and the USA are some of the largest consumers of the Australian meat products(Barbour et al., 2017). Therefore, entering into an economic agreement with these countries before the competitors will give the meat producers in Australia an opportunity to expand their businesses in the international market. Integrating Australians Meat Eating Culture with high Quality Eating From the earlier data provided in this report it evident that the Australians are the largest consumers of the meat in the world(Fowler, 2016). Associating this culture with high quality meat eating means that the producers will brand their products appropriately and the consumers will be willing to pay high. As a result, the meat producers will realize a higher profit. This is untapped opportunity that Australian meat producers should focus on utilizing. High Demand for the Premium Quality Meat Currently, there is a huge demand for the quality meat. Australia has been exporting meat in the international market for over sixty years. This has enabled the country to enhance its reputation as one of the largest and best meet exporters. Besides, there is expected growth in the demand for meat in the international market to 376 million tons by 2030(Dearin, 2015). This gives Australian meat producers an opportunity to improve the quality of their meat as well take advantage of the growing international market by exporting more meat products. Challenges International Competition Apart from the domestic market Australia also largely export its meat products. The Australian meat faces stiff competition especially from India, Brazil, and the United States as a result of live cattle trade(McConchie, 2016). Additionally, these countries experience a lower cost of operations than Australian. Meat producers in the country can overcome this through value based marketing. High Regulatory Costs in the Supply Chain The Australian meat sector is highly fragmented hence increasing the cost of inspection by the government authorities(McConchie, 2016). This increases the prices of the exported meat in the international market. Lack of cooperation between animal suppliers and meat processors. The lack of transparency in this industry has led to the establishment of tension as well as lack reliability among the meat suppliers and the processors(Natalia, 2017). Fluctuating Meat Prices in the International Markets As a result of stiff competition and global financial crisis, the price of the meat tends to fluctuate sometimes leading to losses(Australian Beef Association Inc, 2014). Conclusion There a lot of opportunities as well challenges facing the Australian meat sector. However, the opportunities supersede the challenges. The Australian meat industry can use the available opportunities to expand its domestic and international operations. This will give the industry to claim and maintain the competitive advantage that it can use to rip the benefits of the market growth in future. With sustainable competitive advantage, the industry will be able to overcome both international competition and fluctuating meat prices. On the other side, the industry can request for the government support to eradicate the challenges of high cost of regulation as well as lack of cooperation between the suppliers and meat processors in the industry. References Australian Beef Association Inc, 2014. A Summary of Financial and Marketing Challenges Faced by Cattle Producers, Mowbray, Launceston: Australian Beef Association Inc. Barbour, L., Locke, S. Fitzgerald, B., 2017. Australian meat industry wins better access to lucrative Chinese market. [Online] Available at: https://www.abc.net.au/news/rural/2017-03-24/nrn-more-chilled-beef-to-china/8379284 [Accessed 2 September 2017]. Dearin, C., 2015. GCC Markets: Five Big Opportunities for Australian Food Exporters. [Online] Available at: https://dearinassociates.com/gcc-markets-five-big-opportunities-for-australian-food-exporters/ [Accessed 2 September 2017]. Fowler, C., 2016. Australian sheep producers set to benefit from an increased appetite for lamb in 2017. [Online] Available at: https://www.abc.net.au/news/rural/2016-12-12/next-year-looks-good-for-sheep-producers/8102352 [Accessed 2 September 2017]. Limited, M. . L. A., 2016. Australia's goat meat industry, s.l.: Meat Livestock Australia Limited. McConchie, R., 2016. Red meat sustainability report offers a feast of ideas to tackle challenges. [Online] Available at: https://www.abc.net.au/news/rural/2016-10-26/report-outlines-challenges-red-meat-processing-industry/7968482[Accessed 2 September 2017]. Meat Livestock Australia Limited, 2016. Australias beef industry, s.l.: Meat Livestock Australia Limited. Meat Livestock Australia Limited, 2016. Australias sheep industry, s.l.: Meat Livestock Australia Limited. Natalia, L., 2017. Future of Australia's meat industry up for discussion. [Online] Available at: https://www.northernstar.com.au/news/future-of-australias-meat-industry-up-for-discussi/3139259/ [Accessed 2 September 2017].