caa a22 4500 467921245 CHVBK 20180406152917.0 cr unu---uuuuu 170328e20060801xx s 000 0 eng 10.1007/s10818-006-9002-1 doi (NATIONALLICENCE)springer-10.1007/s10818-006-9002-1 Cassill Deby USF St. Petersburg, 33701-5016, St. Petersburg, FL, USA aut Why Skew Selection, a Model of Parental Exploitation, Should Replace Kin Selection [Elektronische Daten] [Deby Cassill] Synopsis: In his 1964 paper, William Hamilton wrote that inclusive fitness trumps direct fitness if, and only if, the effect of interactions among siblings on their parent's fitness is ‘zero'. Kin selection models have succeeded only because they have ignored the fact that, if an altruist dies saving two siblings, the ‘zero impact on their parent's fitness' constraint is violated. Imagine a parent with three offspring. If two offspring drown, parental fitness is 1. On the other hand, if one altruistic offspring dies saving its two drowning siblings, parental fitness doubles to 2. Thus, direct fitness trumps inclusive fitness as an explanation for the evolution of altruism. In other words, parents that produce some portion of altruistic offspring willing to die to save some of their siblings (who would die without the intervention of the altruist) will realize greater fitness than parents producing no altruists. Skew selection, a bioeconomic extension of Michael Ghiselin's (1974) parental exploitation model, is presented to explain the evolution of altruism from a direct fitness point of view. Springer, 2006 altruism nationallicence parental investment nationallicence Hymenoptera nationallicence inclusive fitness nationallicence haplodiploidy nationallicence Journal of Bioeconomics Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 8/2(2006-08-01), 101-119 1387-6996 8:2<101 2006 8 10818 https://doi.org/10.1007/s10818-006-9002-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10818-006-9002-1 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Cassill Deby USF St. Petersburg, 33701-5016, St. Petersburg, FL, USA aut NATIONALLICENCE 773 0- Journal of Bioeconomics Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 8/2(2006-08-01), 101-119 1387-6996 8:2<101 2006 8 10818 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer