(Mal)adaptation – kokkonuts

When adaptation proceeds, population performance is not guaranteed to improve in any meaningful demographic sense. It may even decrease. Here are plenty of examples how such a thing can happen, and some thoughts about what it all means.

	Ekrem, R.K. & Kokko, H. In press. Sexual conflict over phenological traits: Selection for protandry can lock populations into temporally mismatched reproduction. Evolution.
pdf	Kokko, H. 2021. The stagnation paradox: the ever-improving but (more or less) stationary population fitness. Proceedings of the Royal Society of London B 288: 20212145.
pdf	Sapage, M., Varela, S.A.M. & Kokko, H. 2021. Social learning by mate-choice copying increases dispersal and reduces local adaptation. Functional Ecology 35: 705–716.
pdf	Kokko, H., Chaturvedi, A., Croll, D., Fischer, M.C., Guillaume, F., Karrenberg, S., Kerr, B., Rolshausen, G. & Stapley, J. 2017. Can evolution supply what ecology demands? Trends in Ecology & Evolution 32: 187-197.
haiku Haiku! Close Entries by different coauthors: Shifting migration Competition relaxes Failure to adapt Before, all that rush It’s so peaceful nowadays But now my chicks starve	Day, E. & Kokko, H. 2015. Relaxed selection when you least expect it: why declining bird populations might fail to respond to phenological mismatches. Oikos 124: 62–68.
pdf	Kokko, H., Griffith, S.C. & Pryke, S.R. 2014. The hawk-dove game in a sexually reproducing species explains a colourful polymorphism in an endangered bird. Proceedings of the Royal Society of London B 281: 20141794.
pdf	Harts, A., Schwanz, L. & Kokko, H. 2014. Demography can favour female-advantageous alleles. Proceedings of the Royal Society of London B 281: 20140005.
haiku Haiku! Close Entries by different coauthors: risky dispersal whether too much, too little both suboptimal to selfishly leave more or less than the others may just hurt us all Oceans, they scare me Nearby islands, too, stay far I prefer it so.	Shaw, A.K., Jalasvuori, M. & Kokko, H. 2014. Population-level consequences of risky dispersal. Oikos 123: 1003-1013.
haiku Haiku! Close Entries by different coauthors: I made a baby With my wonderful partner Alas, clone surprise! Suicide using sex? Or then global invasion? Fair or not — it’s there. the worst of two worlds eco-kings and evo-slaves princess of questions	Lehtonen, J., Schmidt, D.J., Heubel, K. & Kokko, H. 2013. Evolutionary and ecological implications of sexual parasitism. Trends in Ecology & Evolution 28: 297-306.
haiku Haiku! Close Entries by different coauthors: Promiscuity: Often leads to trouble but has nice benefits. The fate of your kind (when you mated once again) Was it on your mind?	Holman, L. & Kokko, H. 2013. The consequences of polyandry for population viability, extinction risk and conservation. Philosophical Transactions of the Royal Society of London B 368: 20120053.
haiku Haiku! Close Entries by different coauthors: Forget dilution. Males are the cost of sex. Wasting resources Males, a waste of time Meiosis takes time too, but it's not always bad World so full of sex Genes not diluted at all Males a waste of space pdf	Lehtonen, J., Jennions, M.D. & Kokko, H. 2012. The many costs of sex. Trends in Ecology & Evolution 27: 172–178.
haiku Haiku! Close Migrate or maybe die A warmer world, bad for birds Much squabbling, few friends. pdf	Kokko, H. 2011. Directions in modelling partial migration: how adaptation can cause a population decline and why the rules of territory acquisition matter. Oikos 120: 1826–1837.
haiku Haiku! Close Que sera, sera A fish telling the future? With difficulty. pdf	Kokko, H. & Heubel, K.U. 2011. Prudent males, group adaptation, and the tragedy of the commons. Oikos 120: 641–656 (an invited Per Brinck Oikos Award article).
haiku Haiku! Close Entries by different coauthors: Males love me too much. Do they think I am a fish? Overexploited. Sexual conflict Can be a very bad thing For populations pdf	Rankin, D.J., Dieckmann, U. & Kokko, H. 2011. Sexual conflict and the tragedy of the commons. American Naturalist 177: 780-791.
haiku Haiku! Close ‘After you’ we say. New Found Lands are not for us: You go. – No, you go. pdf	Delgado, M.D.M, Ratikainen, I.I. & Kokko, H. 2011. Inertia: the discrepancy between individual and common good in dispersal and prospecting behaviour. Biological Reviews 86: 717-732.
pdf	López-Sepulcre, A., Kokko, H. & Norris, K. 2010. Evolutionary conservation advice for despotic populations: Habitat heterogeneity favours conflict and reduces productivity in Seychelles Magpie Robins. Proceedings of the Royal Society of London B 277: 3477-3482.
pdf	Heubel, K.U., Rankin, D.J. & Kokko, H. 2009. How to go extinct by mating too much: Population consequences of male mate choice and efficiency in a sexual-asexual species complex. Oikos 118: 513-520.
pdf	López-Sepulcre, A., Norris, K. & Kokko, H. 2009. Reproductive conflict delays the recovery of an endangered social species. Journal of Animal Ecology 78: 219-225.
pdf	Kokko, H., Heubel, K. & Rankin, D.J. 2008. How populations persist when asexuality requires sex: the spatial dynamics of coping with sperm parasites. Proceedings of the Royal Society of London B 275: 817-825.
pdf	Rankin, D.J., Bargum, K. & Kokko, H. 2007. The tragedy of the commons in evolutionary biology. Trends in Ecology & Evolution 22: 643-651.
pdf	Kokko, H. & Brooks, R. 2003. Sexy to die for? Sexual selection and the risk of extinction. Annales Zoologici Fennici 40: 207-219 (invited review).
pdf	Kokko, H. 1999. Cuckoldry and the stability of biparental care. Ecology Letters 2: 247-255.
pdf	Kokko, H. 1999. Competition for early arrival in migratory birds. Journal of Animal Ecology 68: 940-950.