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Illegitimate receiver : ウィキペディア英語版 | Illegitimate receiver
An illegitimate receiver is an organism that intercepts another organism's signal, despite not being the signaler's intended target.〔 In animal communication, a signal is any transfer of information from one organism to another, including visual, olfactory (e.g. pheromones), and auditory signals.〔Mannell, R. (1999). ''Animal Communication and Language''. Retrieved from http://clas.mq.edu.au/animal_communication/.〕 If the illegitimate receiver's interception of the signal is a means of finding prey, the interception is typically a fitness detriment (meaning that it reduces survival or reproductive ability) to either the signaler or the organism meant to legitimately receive the signal, but it is a fitness advantage to the illegitimate receiver because it provides energy in the form of food.〔 Illegitimate receivers can have important effects on the evolution of communication behaviors.〔Alcock, J. (2009). ''Animal Behavior: An Evolutionary Approach'' (9th ed.). Sunderland, Massachusetts: Sinauer Associates, Inc.〕〔Verrell, P. A. (1991). Illegitimate exploitation of sexual signaling systems and the origin of species. ''Ethology, Ecology, and Evolution'', 3(4), 273-283.〕 == Fitness Benefits and Costs ==
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