the idea that natural selection shapes individuals' behavior according to the effect it has on relatives. Though an altruistic behaviour which spreads by kin selection reduces the organism's personal fitness (by definition), it increases what Hamilton called the organism's inclusive fitness. Advances in modern evolutionary theory heralded by inclusive fitness theory and the “gene’s-eye” perspective guide researchers to phenomena Darwin could not have envisioned, such as inherent and predictable forms of within-family conflict and sexual conflict between males and females. Theories and empirical research related to evolutionary psychology. Inclusive fitness makes sense of this unintuitive behavior by pointing out that the prairie dog's relatives, the ones that share many of its genes, will be at an advantage to survive and reproduce. In evolutionary biology and evolutionary psychology, the inclusive fitness of an organism is the sum of its classical fitness (how many of its own offspring it produces and supports) and the number of equivalents of its own offspring it can add to the population by supporting others. Group Selection. Topics include natural selection, sexual selection, inclusive fitness theory, misconceptions about evolution, mating, status, cooperation, aggression, kin relationships, and sexual conflict. That goal can involve direct reproduction, or assisting the reproduction and raising of offspring by relatives. Altruistic behavior promotes the genes rather than the individual. In this sense, "fitness" means the likelihood of a genome, a … Since the whole clan is included in the genetic victory of a few, the phenomenon of beneficial altruism came to be known as “inclusive fitness.” By the 1990s this had become a … The inclusive fitness model of suicide, developed by psychologist Denys deCatanzaro, takes an adaptationist view suicide wherein willful self-destruction is a means of increasing one’s inclusive fitness. Formerly offered as PSYC 359. But kin altruism (also referred to as the inclusive fitness theory) suggests that helping a relative (who shares a large part of our genetic code) increases the likelihood of some of our genes being passed down (Buss, 2014). Inclusive fitness theory is a cornerstone of modern evolutionary biology, yet critics contend it is not general but subject to serious limitations, and is ripe for replacement, for example by multilevel selection theory. Kin Selection Fitness. In evolutionary biology and evolutionary psychology, the inclusive fitness of an organism is the sum of its classical fitness (how many of its own offspring it produces and supports) and the number of equivalents of its own offspring it can add to the population by supporting others. An important influence on modern SST is Hamilton’s (1964) notion of inclusive fitness, which proposes that organisms behave in ways that enable their genes to pass onto successive generations. Inclusive Fitness-includes all the offspring (personal or of relatives) that are alive because of the actions of that individual.
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