Hanna Kokko Laboratory of Ecological and Evolutionary Dynamics, Dept. of Biological and Environmental Sciences, University of Helsinki, FI Title Love in a world of feedback Abstract The different parenting roles by males and females have been argued to underlie variation in potential reproductive rates, translating to sex role asymmetries in competition for mates. However, a closer look reveals some strange things. For example, an old result predicts that a difference in parenting effort does not necessarily mean that males should be the mate-searching sex: solutions to the mate-finding problem can be instead symmetrical between the sexes, because mate searching by one sex feeds back to the other, lessening the need to search. Also, there is much ambiguity in the empirical literature about when females should do mate-searching too. I will show new results that explain why theory can, in the end, predict that male mate searching is common, and explain the conditions for female searching. Also, I will have a new look at another old result, that of inbreeding tolerance: it should often exist, and males should tolerate inbreeding much more than females. Empirical literature is mostly concerned with inbreeding avoidance rather than tolerance, however. Here new 'feedback' theory does not solve the problem so easily, and I will argue that it is possible we may have overlooked some cases where inbreeding depression is indeed compensated by a kin-selected advantage. CV Date and place of birth: 26 September 1971, Helsinki, Finland Present position: Professor (Animal ecology), University of Helsinki, Finland M. Sc. (Tech.) 1995, Helsinki University of Technology Ph. D. 1997 Evolution of honest sexual displays, highest grade laudatur Docent (DSc) of Zoology 31.12.1997, University of Helsinki Teaching assistant 1992 - 1994, Department of Mathematics and Systems Analysis, Helsinki University of Technology Research assistant 1995 (5 months), Department of Zoology, University of Helsinki Researcher January 1995 - July 1997, Department of Zoology, University of Helsinki Postdoctoral fellow 1997 - 1998 (10 months, Academy of Finland), at the Department of Ecology and Systematics, University of Helsinki (1997), and at the Department of Zoology, University of Cambridge, UK (1998) Postdoctoral Marie Curie Reseach Fellow (European Commission) May 1998 - May 2000, University of Cambridge, UK. Also Ethel Cruickshank Research Fellow, Lucy Cavendish College, Cambridge, UK. Postdoctoral Royal Society Dorothy Hodgkin Fellow June 2000 - July 2002, University of Glasgow, UK. Lecturer (Finnish: yliassistentti) August 2002 - July 2003, University of Jyväskylä, Finland. Academy Research Fellow (Finnish Academy) August 2003 - March 2004, University of Helsinki, Finland. Professor (animal ecology), University of Helsinki, 1 April 2004 - present. Awards 1996 Olli’s Prize for the best student talk of the 1996 Spring FIM 5 000 Symposium, University of Helsinki, Department of Ecology and Systematics 1997 Olli’s Prize for the best student talk of the 1997 Spring FIM 5 000 Symposium, University of Helsinki, Department of Ecology and Systematics 1998 Award for an exceptionally high-quality PhD thesis, FIM 5 000 Faculty of Science, University of Helsinki 1999 The 1999 Outstanding New Researcher Award, Association GBP 1 000 for the Study of Animal Behaviour (ASAB) 2000 The Founders’ Prize, British Ecological Society (BES); GBP 500 awarded for oustanding work at an early stage in an ecologist’s career 2005 Teacher of the Year, Department of Biological and Environmental Sciences, University of Helsinki   Selected recent publications: See also www.helsinki.fi/~hmkokko/Publ/ Stoehr, A. & Kokko, H. In press. Sex differences in immunocompetence: what does life history theory predict? Behavioral Ecology. Foster, K.R. & Kokko, H. In press. Cheating can stabilise cooperation in mutualisms. Proceedings of the Royal Society of London B. Kokko, H., Jennions, M.D. & Brooks, R. In press. Unifying and testing models of sexual selection. Annual Reviews of Ecology, Evolution and Systematics. Kokko, H., López-Sepulcre, A. & Morrell, L.J. In press. From hawks and doves to self-consistent games of territorial behavior. American Naturalist. Rankin, D.J. & Kokko, H. In press. Sex, death and tragedy. Trends in Ecology & Evolution. Kokko, H. & Ots, I. 2006. When not to avoid inbreeding. Evolution 60:467-475. Kokko, H. & Rankin, D.J. 2006. Lonely hearts or sex in the city? Density-dependent effects in mating systems. Philosophical Transacions of the Royal Society of London B 361:319-334. Chenoweth, S.F., Doughty, P. & Kokko, H. 2006. Can non-directional male preferences facilitate honest female ornamentation? Ecology Letters 9:179-184. Wong, B.B.M. & Kokko, H. 2005. Is science as global as we think? Trends in Ecology & Evolution 20:475-476. Kokko, H. & Mappes, J. 2005. Sexual selection when fertilization is not guaranteed. Evolution 59:1876-85 Kokko, H. 2005. Useful ways of being wrong. Journal of Evolutionary Biology 18:1155-1157. Kokko, H. 2005. Treat ‘em mean, keep ‘em (sometimes) keen: evolution of female preferences for dominant and coercive males. Evolutionary Ecology 19:123-135. Härdling, R. & Kokko, H. 2005. The evolution of prudent choice. Evolutionary Ecology Research 7:697-715. Kokko, H. & Morrell, L.J. 2005. Mate guarding, male attractiveness and paternity under social monogamy. Behavioral Ecology 16:724-731. Schmeller, D.S., O'Hara, R. & Kokko, H. 2005. Male adaptive stupidity: Male mating pattern in hybridogenetic frogs. Evolutionary Ecology Research 7:1039-1050. López-Sepulcre, A. & Kokko, H. 2005. Territorial defense, territory size and population regulation. American Naturalist 166:317-329. Morrell, L.J. & Kokko, H. 2005. Bridging the gap between mechanistic and adaptive explanations of territoriality. Behavioral Ecology and Sociobiology 57:381-390.   Institution address: Hanna Kokko Laboratory of Ecological and Evolutionary Dynamics, Dept of Biological and Environmental Sciences PO Box 65 00014 University of Helsinki, Finland http://www.helsinki.fi/~hmkokko hanna.kokko@helsinki.fi tel +358 9 1915-7702 fax +358 9 1915-7694