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Chesson's Index
The Manly-Chesson's Index (or Manly's alpha, or Chesson's index) refers to an index to determine selective feeding on discrete food items. It was described separately by Bryan F. J. Manly and Jean Chesson in the 1970s. It was initially described for two different food types, but was later extended to include more food types. The index for two food types is calculated as: \hat\beta = \frac. Where R and B are the number of individuals of present at the start for each species and r and b are the number of items consumed of each type respectively. \hat\beta is the estimate of preference. The use of this index has been widespread with more than 400 citations in the scientific literature.ISI Web of Science Search 5 Feb 2009 References Eating behaviors Ecology {{ecology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foraging
Foraging is searching for wild food resources. It affects an animal's fitness because it plays an important role in an animal's ability to survive and reproduce. Foraging theory is a branch of behavioral ecology that studies the foraging behavior of animals in response to the environment where the animal lives. Behavioral ecologists use economic models and categories to understand foraging; many of these models are a type of optimal model. Thus foraging theory is discussed in terms of optimizing a payoff from a foraging decision. The payoff for many of these models is the amount of energy an animal receives per unit time, more specifically, the highest ratio of energetic gain to cost while foraging. Foraging theory predicts that the decisions that maximize energy per unit time and thus deliver the highest payoff will be selected for and persist. Key words used to describe foraging behavior include ''resources'', the elements necessary for survival and reproduction which have a l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bryan F
Bryan may refer to: Places in the United States * Bryan, Arkansas, an unincorporated community * Bryan, Kentucky, an unincorporated community * Bryan, Ohio, a city * Bryan, Texas, a city * Bryan, Wyoming, a ghost town * Bryan County, Georgia * Bryan County, Oklahoma * Bryan Township (other) * Lake Bryan, Bryan Texas, a power plant cooling pond People * Bryan (given name), a list of people with this name * Bryan (surname), a list of people with this name * Daniel Bryan, ring name of American professional wrestler Bryan Danielson (born 1981) Schools * Bryan University, Tempe, Arizona, United States, a for-profit private university * Bryan College, Dayton, Tennessee, United States a private Christian college * Bryan High School (other) Other uses * Baron Bryan, a baronial title of Plantagenet England * Bryan Boulevard, Greensboro, North Carolina, United States, limited access highway * Bryan House (other) * Bryan Museum, Galveston, Texas, Unit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Chesson
Jean may refer to: People * Jean (female given name) * Jean (male given name) * Jean (surname) Fictional characters * Jean Grey, a Marvel Comics character * Jean Valjean, fictional character in novel ''Les Misérables'' and its adaptations * Jean Pierre Polnareff, a fictional character from ''JoJo's Bizarre Adventure'' * Jean Luc Picard, fictional character from ''Star Trek Next Generation'' Places * Jean, Nevada, United States; a town * Jean, Oregon, United States Entertainment * Jean (dog), a female collie in silent films * "Jean" (song) (1969), by Rod McKuen, also recorded by Oliver * ''Jean Seberg'' (musical), a 1983 musical by Marvin Hamlisch Other uses * JEAN (programming language) * USS ''Jean'' (ID-1308), American cargo ship c. 1918 * Sternwheeler Jean, a 1938 paddleboat of the Willamette River See also *Jehan * * Gene (other) * Jeanne (other) * Jehanne (other) * Jeans (other) * John (other) John is a common En ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eating Behaviors
Eating (also known as consuming) is the ingestion of food. In biology, this is typically done to provide a heterotrophic organism with energy and nutrients and to allow for growth. Animals and other heterotrophs must eat in order to survive – carnivores eat other animals, herbivores eat plants, omnivores consume a mixture of both plant and animal matter, and detritivores eat detritus. Fungi digest organic matter outside their bodies as opposed to animals that digest their food inside their bodies. For humans, eating is more complex, but is typically an activity of daily living. Physicians and dieticians consider a healthful diet essential for maintaining peak physical condition. Some individuals may limit their amount of nutritional intake. This may be a result of a lifestyle choice: as part of a diet or as religious fasting. Limited consumption may be due to hunger or famine. Overconsumption of calories may lead to obesity and the reasons behind it are myriad, however, it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
