- reciprocal altruism
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Used in biology to describe the phenomenon of two animals acting in ways which mutually benefit one another.
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reciprocal altruism
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Reciprocal altruism — Diagram showing reciprocal altruism In evolutionary biology, reciprocal altruism is a behaviour whereby an organism acts in a manner that temporarily reduces its fitness while increasing another organism s fitness, with the expectation that the… … Wikipedia
Altruism in animals — Altruism is a well documented animal behaviour, which appears most obviously in kin relationships but may also be evident amongst wider social groups, in which an animal sacrifices its own well being for the benefit of another animal. Contents 1… … Wikipedia
Reciprocal — may refer to:*Multiplicative inverse, in mathematics, the number 1/ x , which multiplied by x gives the product 1, also known as a reciprocal *Reciprocal (grammar), a relationship between grammatical agents *Reciprocal altruism, a form of… … Wikipedia
Reciprocal food sharing — is a form of reciprocal altruism where one individual gives up the food it has forged to another individual. Food sharing has been observed in a wide range of animals, including insects, birds, cetaceans, vampire bats, and primates [Stevens, J.R … Wikipedia
Altruism — Selflessness redirects here. For the 1965 jazz album, see Selflessness: Featuring My Favorite Things. Giving alms to the poor is often considered an altruistic action in many cultures and religions. Altruism … Wikipedia
Competitive altruism — is a possible mechanism for the persistence of cooperative behaviors, specifically those that are performed unconditionally. The theory of reciprocal altruism can be used to explain behaviors that are performed by a donor who receives some sort… … Wikipedia
Origin of language — The origin of language is the emergence of language in the human species. This is a highly controversial topic, empirical evidence being so limited that many regard it as unsuitable for serious scholars. In 1866, the Linguistic Society of Paris… … Wikipedia
ethics — /eth iks/, n.pl. 1. (used with a sing. or pl. v.) a system of moral principles: the ethics of a culture. 2. the rules of conduct recognized in respect to a particular class of human actions or a particular group, culture, etc.: medical ethics;… … Universalium
evolution — evolutional, adj. evolutionally, adv. /ev euh looh sheuhn/ or, esp. Brit., /ee veuh /, n. 1. any process of formation or growth; development: the evolution of a language; the evolution of the airplane. 2. a product of such development; something… … Universalium
Group selection — In evolutionary biology, group selection refers to the idea that alleles can become fixed or spread in a population because of the benefits they bestow on groups, regardless of the alleles effect on the fitness of individuals within that group.… … Wikipedia
