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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 other organism will act in a similar manner at a later time. The concept was initially developed by Robert Trivers to explain the evolution of cooperation as instances of mutually altruistic acts. The concept is close to the strategy of " tit for tat" used in game theory. In 1987, Trivers presented at a symposium on reciprocity, noting that he initially titled his article "The Evolution of Delayed Return Altruism," but reviewer W. D. Hamilton suggested renaming it "The Evolution of Reciprocal Altruism." While Trivers adopted the new title, he retained the original examples, causing confusion about reciprocal altruism for decades. Rothstein and Pierotti (1988) addressed this issue at the symposium, proposing new definitions that clarified the concepts. They argued that Delayed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reciprocal Altruism Summary
Reciprocal may refer to: In mathematics * Multiplicative inverse, in mathematics, the number 1/''x'', which multiplied by ''x'' gives the product 1, also known as a ''reciprocal'' * Reciprocal polynomial, a polynomial obtained from another polynomial by reversing its coefficients * Reciprocal rule, a technique in calculus for calculating derivatives of reciprocal functions * Reciprocal spiral, a plane curve * Reciprocal averaging, a statistical technique for aggregating categorical data In science and technology * Reciprocal aircraft heading, 180 degrees (the opposite direction) from a stated heading * Reciprocal lattice, a basis for the dual space of covectors, in crystallography * Reciprocal length, a measurement used in science * Reciprocating engine or piston engine * Reciprocating oscillation in physical wave theory Life sciences and medicine * Hybrid (biology), in genetics, the result of a reciprocal pair of crossings, forming ''reciprocal hybrids'' * Reciprocal al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arctic Tern (Sterna Paradisaea) Attacking, Amsterdam Island, Svalbard
The Arctic tern (''Sterna paradisaea'') is a tern in the family Laridae. This bird has a circumpolar breeding distribution covering the Arctic and sub-Arctic regions of Europe (as far south as Brittany), Asia, and North America (as far south as Massachusetts). The species is strongly migratory, seeing two summers each year as it migrates along a convoluted route from its northern breeding grounds to the Antarctic coast for the southern summer and back again about six months later. Recent studies have shown average annual round-trip lengths of about for birds nesting in Iceland and Greenland and about for birds nesting in the Netherlands. These are by far the longest migrations known in the animal kingdom. The Arctic tern nests once every one to three years (depending on its mating cycle). Arctic terns are medium-sized birds. They have a length of and a wingspan of . They are mainly grey and white plumaged, with a red/orange beak and feet, white forehead, a black nape and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evolutionary Models Of Food Sharing
Evolutionary biologists have developed various theoretical models to explain the evolution of food-sharing behavior—"[d]efined as the unresisted transfer of food" from one food-motivated individual to another—Human behavior , among humans and Animal behavior , other animals. Models of food-sharing are based upon general evolutionary theory. When applied to human behavior, these models are considered a branch of human behavioral ecology. Researchers have developed several types of food-sharing models, involving phenomena such as kin selection, reciprocal altruism, tolerated theft, group cooperation, and Costly signaling theory in evolutionary psychology , costly signaling. Kin-selection and reciprocal-altruism models of food-sharing are based upon evolutionary concepts of kin selection and Altruism (biology) , altruism. Since the theoretical basis of these models involves reproductive fitness, one underlying assumption of these models is that greater resource-accumulation inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enlightened Self-interest
Enlightened self-interest is a philosophy in ethics which states that persons who act to further the interests of others (or the interests of the group or groups to which they belong) ultimately serve their own self-interest. It has often been simply expressed by the belief that an individual, group, or even a commercial entity will "do well by doing good". The term ''enlightened self-interest'' has been criticized as a mere ideological or semantic device of neoclassical economic theory to justify this type of behavior. It has been considered at best a variant of self-interest that is unsuitable for the establishment of personal and public relations because - like the definition of self-interest in the standard rational-choice model - it fails to characterise human behaviour ethically, psychologically, and cognitively. Related and contrasting concepts Unenlightened self-interest In contrast to ''enlightened'' self-interest is simple greed, or the concept of "''unenlightened'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Competitive Altruism
Competitive altruism is a possible mechanism for the persistence of cooperative behaviours, specifically those that are performed unconditionally. The theory of reciprocal altruism can be used to explain behaviours that are performed by a donor who receives some sort of benefit in the future. When no such compensation is received, however, reciprocity fails to explain altruistic behaviour. Both reciprocal altruism and competitive altruism anticipate that the more altruistic one is, the more they will receive.Roberts, G. 1998. Competitive altruism: from reciprocity to the handicap principle. Proc. R. Soc. Lond., B 265: 429-430. Competitive altruism explains unreciprocated altruistic behaviour as individuals striving to outcompete others in terms of their generosity so as to gain the unique benefits obtained from an enhanced status and reputation.Hardy, C. & Van Vugt, M. (2006). Nice guys finish first: The competitive altruism hypothesis. Personality and Social Psychology Bulletin, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Good
In philosophy, Common good (economics), economics, and political science, the common good (also commonwealth, common weal, general welfare, or public benefit) is either what is shared and beneficial for all or most members of a given community, or alternatively, what is achieved by citizenship, collective action, and active participation in the realm of politics and public service. The concept of the common good differs significantly among List of philosophies, philosophical doctrines. Early conceptions of the common good were set out by Ancient Greece, Ancient Greek philosophers, including Aristotle and Plato. One understanding of the common good rooted in Aristotelianism, Aristotle's philosophy remains in common usage today, referring to what one contemporary scholar calls the "good proper to, and attainable only by, the community, yet individually shared by its members." The concept of common good developed through the work of political theorists, moral philosophers, and public ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Collaboration
Collaboration (from Latin ''com-'' "with" + ''laborare'' "to labor", "to work") is the process of two or more people, entities or organizations working together to complete a task or achieve a goal. Collaboration is similar to cooperation. The form of leadership can be social within a decentralized and egalitarian group.Spence, Muneera U. ''"Graphic Design: Collaborative Processes = Understanding Self and Others."'' (lecture) Art 325: Collaborative Processes. Fairbanks Hall, Oregon State University, Corvallis, Oregon. 13 April 2006See also. Teams that work collaboratively often access greater resources, recognition and rewards when facing competition for finite resources. Caroline S. Wagner and Loet Leydesdorff. Globalisation in the network of science in 2005: The diffusion of international collaboration and the formation of a core group.'' Structured methods of collaboration encourage introspection of behavior and communication. Such methods aim to increase the success of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Altruism (biology)
In biology, altruism refers to behaviour by an individual that increases the fitness of another individual while decreasing their own. Altruism in this sense is different from the philosophical concept of altruism, in which an action would only be called "altruistic" if it was done with the conscious intention of helping another. In the behavioural sense, there is no such requirement. As such, it is not evaluated in moral terms—it is the consequences of an action for reproductive fitness that determine whether the action is considered altruistic, not the intentions, if any, with which the action is performed. The term ''altruism'' was coined by the French philosopher Auguste Comte in French, as ''altruisme'', for an antonym of egoism. He derived it from the Italian ''altrui'', which in turn was derived from Latin ''alteri'', meaning "other people" or "somebody else". Altruistic behaviours appear most obviously in kin relationships, such as in parenting, but may also be eviden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pigeons
Columbidae is a bird family consisting of doves and pigeons. It is the only family in the order Columbiformes. These are stout-bodied birds with small heads, relatively short necks and slender bills that in some species feature fleshy ceres. They feed largely on plant matter, feeding on seeds (granivory), fruit (frugivory), and foliage (folivory). In colloquial English, the smaller species tend to be called "doves", and the larger ones "pigeons", although the distinction is not consistent, and there is no scientific separation between them. Historically, the common names for these birds involve a great deal of variation. The bird most commonly referred to as "pigeon" is the domestic pigeon, descendant of the wild rock dove, which is a common inhabitant of cities as the feral pigeon. Columbidae contains 51 genera divided into 353 species. The family occurs worldwide, often in close proximity to humans, but the greatest diversity is in the Indomalayan and Australasian rea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prisoner's Dilemma
The prisoner's dilemma is a game theory thought experiment involving two rational agents, each of whom can either cooperate for mutual benefit or betray their partner ("defect") for individual gain. The dilemma arises from the fact that while defecting is rational for each agent, cooperation yields a higher payoff for each. The puzzle was designed by Merrill Flood and Melvin Dresher in 1950 during their work at the RAND Corporation. They invited economist Armen Alchian and mathematician John Williams to play a hundred rounds of the game, observing that Alchian and Williams often chose to cooperate. When asked about the results, John_Forbes_Nash_Jr., John Nash remarked that rational behavior in the Prisoner's dilemma#The_iterated_prisoner's_dilemma, iterated version of the game can differ from that in a single-round version. This insight anticipated a Folk_theorem_(game_theory), key result in game theory: cooperation can emerge in repeated interactions, even in situations where it i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bactrocera Tryoni
''Bactrocera tryoni'', the Queensland fruit fly, is a species of fly in the family Tephritidae in the insect order Diptera. ''B. tryoni'' is native to subtropical coastal Queensland and northern New South Wales. They are active during the day, but mate at night. ''B. tryoni'' lay their eggs in fruit. The larvae then hatch and proceed to consume the fruit, causing the fruit to decay and drop prematurely. ''B. tryoni'' are responsible for an estimated $28.5 million a year in damage to Australian crops and are the most costly horticultural pest in Australia. Up to 100% of exposed fruit can be destroyed due to an infestation of this fly species. Previously, pesticides were used to eliminate ''B. tryoni'' from damaging crops. However, these chemicals are now banned. Thus, experts devoted to ''B. tryoni'' control have transitioned to studying this pests' behaviors to determine a new method of elimination. Identification Adult ''B. tryoni'' flies are reddish brown in color, have distinc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Primates (journal)
''Primates'' is a bimonthly peer-reviewed scientific journal of primatology, and an official journal of the Japan Monkey Center at Kyoto University. It publishes original papers that cover all aspects of the study of primates. The journal publishes original research articles, reviews, news and perspectives, and book reviews. It was established in 1957 by Kinji Imanishi. Although the first volume contained both articles in Japanese or English, subsequent volumes were published in English, thanks to a grant from the Rockefeller Foundation. It is now published by Springer and the current editor-in-chief is Masayuki Nakamichi ( Osaka University). According to the ''Journal Citation Reports'', the journal has a 2020 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a type of journal ranking. Journals with higher impact factor values are considered more prestigious or important within their field. The Impact Factor of a journa ... of 2. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
