Wedekind, C. & Küng, C. Shift of spawning season and effects of climate warming on developmental stages of a grayling (Salmonidae). Conserv. Biol. 24, 1418–1423 (2010).
Google Scholar
Capdevila, P., Stott, I., Beger, M. & Salguero-Gómez, R. Towards a comparative framework of demographic resilience. Trends Ecol. Evol. 35, 776–786 (2020).
Google Scholar
Katzner, T. E. et al. Assessing population-level consequences of anthropogenic stressors for terrestrial wildlife. Ecosphere 11, e03046 (2020).
Zhou, X. & Hesketh, T. High sex ratios in rural China: declining well-being with age in never-married men. Philos. Trans. R. Soc. B: Biol. Sci. 372, 20160324 (2017). One of the few studies in humans that targets well-being as an outcome, showing concerning mental health implications of sex ratio skew.
Schacht, R., Rauch, K. L. & Borgerhoff Mulder, M. Too many men: the violence problem? Trends Ecol. Evol. 29, 214–222 (2014). An influential review of violence and sex ratios across human societies that sets the agenda how reformulated sexual selection theory can inform mating strategies in humans.
Google Scholar
Donald, P. F. Adult sex ratios in wild bird populations. Ibis 149, 671–692 (2007).
Székely, T., Weissing, F. J. & Komdeur, J. Adult sex ratio variation: implications for breeding system evolution. J. Evol. Biol. 27, 1500–1512 (2014). A comprehensive overview of mate choice, mating systems and parental care in relation to ASR.
Google Scholar
Du Bois, W. E. B. The Philadelphia Negro (The University of Pennsylvania, 1899).
Groves, E. & Ogburn, W. American Marriage and Family Relationships (Henry Holt and Company, 1928).
Mayr, E. The sex ratio in wild birds. Am. Naturalist 73, 156–179 (1939).
Trivers, R. L. Parental investment and sexual selection. in Sexual Selection & the Descent of Man 136–179 (Aldine de Gruyter, 1972).
Kramer, K., Schacht, R. & Bell, A. Adult sex ratios and partner scarcity among hunter–gatherers: Implications for dispersal patterns and the evolution of human sociality. Philos. Trans. R. Soc. B: Biol. Sci. 372, 20160316 (2017).
Kappeler, P. M. et al. Sex roles and sex ratios in animals. Biol. Rev. (in press).
Kappeler, P. M. Sex roles and adult sex ratios: insights from mammalian biology and consequences for primate behaviour. Philos. Trans. R. Soc. B: Biol. Sci. 372, 20160321 (2017).
Clutton-Brock, T. Social evolution in mammals. Science 373, eabc9699 (2021).
Google Scholar
Garamszegi, L. Z., Pavlova, D. Z., Eens, M. & Møller, A. P. The evolution of song in female birds in Europe. Behav. Ecol. 18, 86–96 (2007).
Cooney, C. R. et al. Sexual selection predicts the rate and direction of colour divergence in a large avian radiation. Nat. Commun. 10, 1773 (2019).
Google Scholar
Ancona, S., Dénes, F. V., Krüger, O., Székely, T. & Beissinger, S. R. Estimating adult sex ratios in nature. Philos. Trans. R. Soc. B: Biol. Sci. 372, 20160313 (2017). A methodology-focused review highlighting the pros and cons of various ASR estimation methods used in wildlife biology.
Fitze, P. S. & Le Galliard, J.-F. Operational sex ratio, sexual conflict and the intensity of sexual selection. Ecol. Lett. 11, 432–439 (2008).
Google Scholar
Kokko, H. & Jennions, M. D. Parental investment, sexual selection and sex ratios. J. Evolut. Biol. 21, 919–948 (2008). A landmark theoretical study that explains the complex relationships between parental care, ASR and OSR.
Emlen, S. T. & Oring, L. W. Ecology, sexual selection, and the evolution of mating systems. Science 197, 215–223 (1977). A landmark study that introduced the concept of operational sex ratio (OSR).
Google Scholar
Pipoly, I. et al. The genetic sex-determination system predicts adult sex ratios in tetrapods. Nature 527, 91–94 (2015). A pathbreaking phylogenetic study that showed sex determination systems are related to ASR in tetrapods.
Google Scholar
Carmona-Isunza, M. C. et al. Adult sex ratio and operational sex ratio exhibit different temporal dynamics in the wild. Behav. Ecol. 28, 523–532 (2017).
Weir, L., Grant, J. & Hutchings, J. The influence of operational sex ratio on the intensity of competition for mates. Am. Naturalist 177, 167–176 (2011).
Hays, G. C., Shimada, T. & Schofield, G. A review of how the biology of male sea turtles may help mitigate female-biased hatchling sex ratio skews in a warming climate. Mar. Biol. 169, 89 (2022).
Ancona, S., Liker, A., Carmona-Isunza, M. C. & Székely, T. Sex differences in age-to-maturation relate to sexual selection and adult sex ratios in birds. Evolution Lett. 4, 44–53 (2020).
Gluckman, P. D. & Hanson, M. A. Evolution, development and timing of puberty. Trends Endocrinol. Metab. 17, 7–12 (2006).
Google Scholar
Veran, S. & Beissinger, S. R. Demographic origins of skewed operational and adult sex ratios: perturbation analyses of two-sex models. Ecol. Lett. 12, 129–143 (2009).
Google Scholar
Wilson, E. O. Sociobiology: The New Synthesis. (Harvard University Press, 1975).
Ågren, J. A. & Clark, A. G. Selfish genetic elements. PLoS Genet. 14, e1007700 (2018).
Google Scholar
Engelstädter, J. & Hurst, G. D. D. The ecology and evolution of microbes that manipulate host reproduction. Annu. Rev. Ecol., Evolution, Syst. 40, 127–149 (2009).
Beukeboom, L. W. & Perrin, N. The Evolution of Sex Determination. (Oxford University Press, 2014). https://doi.org/10.1093/acprof:oso/9780199657148.001.0001.
Geffroy, B. & Douhard, M. The adaptive sex in stressful environments. Trends Ecol. Evol. 34, 628–640 (2019).
Google Scholar
Nemesházi, E. et al. Novel genetic sex markers reveal high frequency of sex reversal in wild populations of the agile frog (Rana dalmatina) associated with anthropogenic land use. Mol. Ecol. 29, 3607–3621 (2020).
Google Scholar
Geffroy, B. Energy as the cornerstone of environmentally driven sex allocation. Trends Endocrinol. Metab. 33, 670–679 (2022).
Google Scholar
Janzen, F. J. & Paukstis, G. L. Environmental sex determination in reptiles: ecology, evolution, and experimental design. Q Rev. Biol. 66, 149–179 (1991).
Google Scholar
Cook, J. M. Sex determination in invertebrates. in Sex Ratios: Concepts and Research Methods (ed. Hardy, I. C. W.) 178–194 (Cambridge University Press, 2002). https://doi.org/10.1017/CBO9780511542053.009.
Godwin, J., Luckenbach, J. A. & Borski, R. J. Ecology meets endocrinology: environmental sex determination in fishes. Evol. Dev. 5, 40–49 (2003).
Google Scholar
West, S. Sex Allocation. (Princeton University Press, 2009).
Geffroy, B. & Wedekind, C. Effects of global warming on sex ratios in fishes. J. Fish. Biol. 97, 596–606 (2020).
Google Scholar
Edmands, S. Sex ratios in a warming world: thermal effects on sex-biased survival, sex determination, and sex reversal. J. Heredity 112, 155–164 (2021).
Valenzuela, N. et al. Extreme thermal fluctuations from climate change unexpectedly accelerate demographic collapse of vertebrates with temperature-dependent sex determination. Sci. Rep. 9, 4254 (2019).
Google Scholar
Hays, G. C., Mazaris, A. D. & Schofield, G. Different male vs. female breeding periodicity helps mitigate offspring sex ratio skews in sea turtles. Front. Marine Sci. 1, 43 (2014).
Maitre, D. et al. Sex differentiation in grayling (Salmonidae) goes through an all-male stage and is delayed in genetic males who instead grow faster. Sci. Rep. 7, 15024 (2017).
Google Scholar
Donald, P. F. Lonely males and low lifetime productivity in small populations. Ibis 153, 465–467 (2011).
Mabry, K. E., Shelley, E. L., Davis, K. E., Blumstein, D. T. & Vuren, D. H. V. Social mating system and sex-biased dispersal in mammals and birds: a phylogenetic analysis. PLoS ONE 8, e57980 (2013).
Google Scholar
Clutton-Brock, T. Mammal Societies. (John Wiley and Sons, 2016).
Kalmbach, E. & Benito, M. M. Sexual size dimorphism and offspring vulnerability in birds. in Sex, Size and Gender Roles (Oxford University Press, 2007). https://doi.org/10.1093/acprof:oso/9780199208784.003.0015.
Berger, J. & Gompper, M. E. Sex ratios in extant ungulates: products of contemporary predation or past life histories? J. Mammal. 80, 1084–1113 (1999).
Christe, P., Keller, L. & Roulin, A. The predation cost of being a male: implications for sex-specific rates of ageing. Oikos 114, 381–384 (2006).
Boukal, D. S., Berec, L. & Křivan, V. Does sex-selective predation stabilize or destabilize predator-prey dynamics? PLoS ONE 3, e2687 (2008).
Google Scholar
Moore, S. L. & Wilson, K. Parasites as a viability cost of sexual selection in natural populations of mammals. Science 297, 2015–2018 (2002).
Google Scholar
Fairbairn, D., Blanckenhorn, W. & Székely, T. Sex, Size and Gender Roles: Evolutionary Studies of Sexual Size Dimorphism. Sex, Size and Gender Roles: Evolutionary Studies of Sexual Size Dimorphism https://doi.org/10.1093/acprof:oso/9780199208784.001.0001 (2007).
Székely, T., Liker, A., Freckleton, R. P., Fichtel, C. & Kappeler, P. M. Sex-biased survival predicts adult sex ratio variation in wild birds. Proc. R. Soc. B: Biol. Sci. 281, 20140342 (2014).
Tidière, M. et al. Does sexual selection shape sex differences in longevity and senescence patterns across vertebrates? A review and new insights from captive ruminants. Evolution 69, 3123–3140 (2015).
Google Scholar
Lemaître, J.-F. et al. Sex differences in adult lifespan and aging rates of mortality across wild mammals. Proc. Natl Acad. Sci. USA 117, 8546–8553 (2020).
Google Scholar
Wedekind, C. et al. Persistent unequal sex ratio in a population of grayling (Salmonidae) and possible role of temperature increase. Conserv. Biol. 27, 229–234 (2013).
Google Scholar
Eberhart-Phillips, L. J. et al. Demographic causes of adult sex ratio variation and their consequences for parental cooperation. Nat. Commun. 9, 1651 (2018).
Google Scholar
Schacht, R., Macfarlan, S. J., Meeks, H., Cervantes, P. L. & Morales, F. Male survival advantage on the Baja California peninsula. Biol. Lett. 16, 20200600 (2020).
Google Scholar
Schacht, R., Tharp, D. & Smith, K. R. Sex ratios at birth vary with environmental harshness but not maternal condition. Sci. Rep. 9, 9066 (2019).
Google Scholar
Schacht, R. et al. Frail males on the American frontier: the role of environmental harshness on sex ratios at birth across a period of rapid industrialization. Soc. Sci. 10, 319 (2021).
Casey, J. A., Gemmill, A., Elser, H., Karasek, D. & Catalano, R. Sun smoke in Sweden: perinatal implications of the Laki volcanic eruptions, 1783–1784. Epidemiology 30, 330–333 (2019).
Google Scholar
Catalano, R., Bruckner, T. & Smith, K. R. Ambient temperature predicts sex ratios and male longevity. Proc. Natl Acad. Sci. USA 105, 2244–2247 (2008).
Google Scholar
Hollingshaus, M., Utz, R., Schacht, R. & Smith, K. R. Sex ratios and life tables: Historical demography of the age at which women outnumber men in seven countries, 1850–2016. Historical Methods.: A J. Quant. Interdiscip. Hist. 52, 244–253 (2019).
Li, X.-Y. & Kokko, H. Sex-biased dispersal: a review of the theory. Biol. Rev. 94, 721–736 (2019).
Google Scholar
Alho, J. S., Matsuba, C. & Merilä, J. Sex reversal and primary sex ratios in the common frog (Rana temporaria). Mol. Ecol. 19, 1763–1773 (2010).
Google Scholar
Sandercock, B. K., Beissinger, S. R., Stoleson, S. H., Melland, R. R. & Hughes, C. R. Survival rates of a neotropical parrot: implications for latitudinal comparisons of avian demography. Ecology 81, 1351–1370 (2000).
Budden, A. E. & Beissinger, S. R. Against the odds? Nestling sex ratio variation in green-rumped parrotlets. Behav. Ecol. 15, 607–613 (2004).
Thompson, F. J. et al. Reproductive competition triggers mass eviction in cooperative banded mongooses. Proc. Biol. Sci. 283, 20152607 (2016).
Google Scholar
Jaccarini, V., AGius, L., Schembri, P. J. & Rizzo, M. Sex determination and larval sexual interaction in Bonellia viridis Rolando (Echiura: Bonelliidae). J. Exp. Mar. Biol. Ecol. 66, 25–40 (1983).
Tingley, G. & Anderson, R. Environmental sex determination and density-dependent population regulation in the entomogenous nematode Romanomermis culcivorax. Parasitology 92, 431–449 (1986).
Hardisty, M. W. Sex composition of lamprey populations. Nature 191, 1116–1117 (1961).
Docker, M. F., William, F. & Beamish, H. Age, growth, and sex ratio among populations of least brook lamprey, Lampetra aepyptera, larvae: an argument for environmental sex determination. Environ. Biol. Fish. 41, 191–205 (1994).
Geffroy, B. & Bardonnet, A. Sex differentiation and sex determination in eels: consequences for management. Fish. Fish. 17, 375–398 (2016).
Ribas, L., Valdivieso, A., Díaz, N. & Piferrer, F. Appropriate rearing density in domesticated zebrafish to avoid masculinization: links with the stress response. J. Exp. Biol. 220, 1056–1064 (2017).
Google Scholar
García-Cruz, E. L. et al. Crowding stress during the period of sex determination causes masculinization in pejerrey Odontesthes bonariensis, a fish with temperature-dependent sex determination. Comp. Biochem. Physiol. A Mol. Integr. Physiol. 245, 110701 (2020).
Google Scholar
Geffroy, B. et al. Parental selection for growth and early-life low stocking density increase the female-to-male ratio in European sea bass. Sci. Rep. 11, 13620 (2021).
Google Scholar
Fricke, H. & Fricke, S. Monogamy and sex change by aggressive dominance in coral reef fish. Nature 266, 830–832 (1977).
Google Scholar
Todd, E. V. et al. Stress, novel sex genes, and epigenetic reprogramming orchestrate socially controlled sex change. Sci. Adv. 5, eaaw7006 (2019).
Google Scholar
Kuwamura, T., Nakashimn, Y. & Yogo, Y. Sex change in either direction by growth-rate advantage in the monogamous coral goby, Paragobiodon echinocephalus. Behav. Ecol. 5, 434–438 (1994).
Rodgers, E. W., Earley, R. L. & Grober, M. S. Social status determines sexual phenotype in the bi-directional sex changing bluebanded goby Lythrypnus dalli. J. Fish. Biol. 70, 1660–1668 (2007).
Munday, P. L., Caley, M. J. & Jones, G. P. Bi-directional sex change in a coral-dwelling goby. Behav. Ecol. Sociobiol. 43, 371–377 (1998).
Goikoetxea, A., Todd, E. V. & Gemmell, N. J. Stress and sex: does cortisol mediate sex change in fish? Reproduction 154, R149–R160 (2017).
Google Scholar
Nozu, R. & Nakamura, M. Cortisol administration induces sex change from ovary to testis in the protogynous Wrasse, Halichoeres trimaculatus. Sex. Dev. 9, 118–124 (2015).
Google Scholar
Olivotto, I. & Geffroy, B. Clownfish. in Marine Ornamental Species Aquaculture (eds. Calado, R., Olivotto, I., Oliver, M. P. & Holt, G. J.) 177–199 (John Wiley & Sons, Ltd, 2017). https://doi.org/10.1002/9781119169147.ch12.
Bessa, E., Brandão, M. L. & Gonçalves-de-Freitas, E. Integrative approach on the diversity of nesting behaviour in fishes. Fish Fisheries 23, 564–583 (2022).
Safari, I. & Goymann, W. The evolution of reversed sex roles and classical polyandry: Insights from coucals and other animals. Ethology 127, 1–13 (2021).
Komdeur, J., Székely, T., Long, X. & Kingma, S. A. Adult sex ratios and their implications for cooperative breeding in birds. Philos. Trans. R. Soc. Lond. B Biol. Sci. 372, 20160322 (2017).
Google Scholar
Jankowiak, Ł., Tryjanowski, P., Hetmański, T. & Skórka, P. Experimentally evoked same-sex sexual behaviour in pigeons: better to be in a female-female pair than alone. Sci. Rep. 8, 1654 (2018).
Google Scholar
Darwin, C. The Descent of Man, and Selection in Relation to Sex (John Murray, 1871).
Bleu, J., Bessa-Gomes, C. & Laloi, D. Evolution of female choosiness and mating frequency: effects of mating cost, density and sex ratio. Anim. Behav. 83, 131–136 (2012).
Forsgren, E., Amundsen, T., Borg, A. A. & Bjelvenmark, J. Unusually dynamic sex roles in a fish. Nature 429, 551–554 (2004).
Google Scholar
Monier, M., Nöbel, S., Isabel, G. & Danchin, E. Effects of a sex ratio gradient on female mate-copying and choosiness in Drosophila melanogaster. Curr. Zool. 64, 251–258 (2018).
Google Scholar
Jirotkul, M. Operational sex ratio influences preference and male–male competition in guppies. Anim. Behav. 58, 287–294 (1999).
Google Scholar
Grant, P. R. & Grant, B. R. Adult sex ratio influences mate choice in Darwin’s finches. Proc. Natl Acad. Sci. USA 116, 12373–12382 (2019).
Google Scholar
Queller, D. C. Why do females care more than males? Proc. Biol. Sci. 264, 1555–1557 (1997). A prescient overview that explains why females are more likely than males to provide care, including the explanation that a female-biased ASR means that males have a higher mean mating rate than females, which makes caring more costly for males.
Google Scholar
Janicke, T., Häderer, I. K., Lajeunesse, M. J. & Anthes, N. Darwinian sex roles confirmed across the animal kingdom. Sci. Adv. 2, e1500983 (2016).
Google Scholar
Liker, A. et al. Evolution of large males is associated with female‐skewed adult sex ratios in amniotes. Evolution 75, 1636–1649 (2021).
Google Scholar
Clutton-Brock, T. H., Harvey, P. H. & Rudder, B. Sexual dimorphism, socionomic sex ratio and body weight in primates. Nature 269, 797–800 (1977).
Google Scholar
Wittenberger, J. F. The evolution of mating systems in grouse. Condor 80, 126–137 (1978).
Vahl, W. K., Boiteau, G., Heij, M. E., de, MacKinley, P. D. & Kokko, H. Female fertilization: effects of sex-specific density and sex ratio determined experimentally for colorado potato beetles and drosophila fruit flies. PLoS ONE 8, e60381 (2013).
Google Scholar
House, C. M., Rapkin, J., Hunt, J. & Hosken, D. J. Operational sex ratio and density predict the potential for sexual selection in the broad-horned beetle. Anim. Behav. 152, 63–69 (2019).
Warner, R. R. & Hoffman, S. G. Population density and the economics of territorial defense in a coral reef fish. Ecology 61, 772–780 (1980).
Pröhl, H. Population differences in female resource abundance, adult sex ratio, and male mating success in Dendrobates pumilio. Behav. Ecol. 13, 175–181 (2002).
McNamara, J. M., Székely, T., Webb, J. N. & Houston, A. I. A dynamic game-theoretic model of parental care. J. Theor. Biol. 205, 605–623 (2000).
Google Scholar
Davies, N. B. Dunnock Behaviour and Social Evolution. (Oxford University Press, 1992).
Pilastro, A., Biddau, L., Marin, G. & Mingozzi, T. Female brood desertion increases with number of available mates in the Rock Sparrow. J. Avian Biol. 32, 68–72 (2001).
Rossmanith, E., Grimm, V., Blaum, N. & Jeltsch, F. Behavioural flexibility in the mating system buffers population extinction: lessons from the lesser spotted woodpecker Picoides minor. J. Anim. Ecol. 75, 540–548 (2006).
Google Scholar
Liker, A., Freckleton, R. P. & Székely, T. The evolution of sex roles in birds is related to adult sex ratio. Nat. Commun. 4, 1587 (2013). An important comparative study that shows both social mating system and parenting are associated with ASR in shorebirds.
Google Scholar
Liker, A., Freckleton, R. P. & Székely, T. Divorce and infidelity are associated with skewed adult sex ratios in birds. Curr. Biol. 24, 880–884 (2014).
Google Scholar
Balshine-Earn, S. & Earn, D. J. D. On the evolutionary pathway of parental care in mouth-brooding cichlid fishes. Proc. ofn R. Soc. 265, 2217–2222 (1998).
Parra, J. E., Beltrán, M., Zefania, S., Dos Remedios, N. & Székely, T. Experimental assessment of mating opportunities in three shorebird species. Anim. Behav. 90, 83–90 (2014).
Székely, T., Cuthill, I. & Kis, J. Brood desertion in Kentish plover: sex differences in remating opportunities. Behav. Ecol. 10, 185–190 (1999). An important early field study showing that intraspecific variation in parental care can be explained by the availability of mates, which in turn depends on the prevailing ASR.
Clutton-Brock, T. H. The Evolution of Parental Care. The Evolution of Parental Care (Princeton University Press, 1991). https://doi.org/10.1515/9780691206981.
Bessa-Gomes, C., Legendre, S. & Clobert, J. Allee effects, mating systems and the extinction risk in populations with two sexes. Ecol. Lett. 7, 802–812 (2004).
Lindström, J. & Kokko, H. Sexual reproduction and population dynamics: the role of polygyny and demographic sex differences. Proc. Biol. Sci. 265, 483–488 (1998).
Google Scholar
Lee, A. M., Saether, B.-E. & Engen, S. Demographic stochasticity, allee effects, and extinction: the influence of mating system and sex ratio. Am. Naturalist 177, 301–313 (2011).
Leach, D., Shaw, A. K. & Weiss-Lehman, C. Stochasticity in social structure and mating system drive extinction risk. Ecosphere 11, e03038 (2020).
Gownaris, N. J. & Boersma, P. D. Sex-biased survival contributes to population decline in a long-lived seabird, the Magellanic Penguin. Ecol. Appl. 29, 1–17 (2019).
Le Galliard, J.-F., Fitze, P. S., Ferrière, R. & Clobert, J. Sex ratio bias, male aggression, and population collapse in lizards. Proc. Natl Acad. Sci. USA 102, 18231–18236 (2005).
Google Scholar
Lea, J. M. D. et al. Non-invasive physiological markers demonstrate link between habitat quality, adult sex ratio and poor population growth rate in a vulnerable species, the Cape mountain zebra. Funct. Ecol. 32, 300–312 (2018).
Dreiss, A. N., Cote, J., Richard, M., Federici, P. & Clobert, J. Age-and sex-specific response to population density and sex ratio. Behav. Ecol. 21, 356–364 (2010).
Dale, S. Female-biased dispersal, low female recruitment, unpaired males, and the extinction of small and isolated bird populations. Oikos 92, 344–356 (2001).
Morrison, C. A., Robinson, R. A., Clark, J. A. & Gill, J. A. Causes and consequences of spatial variation in sex ratios in a declining bird species. J. Anim. Ecol. 85, 1298–1306 (2016).
Google Scholar
Chipman, A. & Morrison, E. The impact of sex ratio and economic status on local birth rates. Biol. Lett. 9, 20130027 (2013).
Google Scholar
Krainacker, D. A. & Carey, J. R. Sex ratio in a wild population of twospotted spider mites. Holarct. Ecol. 14, 97–103 (1991).
Bunnell, D. B., Madenjian, C. P. & Croley, T. E. Long-term trends of bloater (Coregonus hoyi) recruitment in Lake Michigan: evidence for the effect of sex ratio. Can. J. Fish. Aquat. Sci. 63, 832–844 (2006).
Forbes, M. R., McCurdy, D. G., Lui, K., Mautner, S. I. & Boates, J. S. Evidence for seasonal mate limitation in populations of an intertidal amphipod, Corophium volutator (Pallas). Behav. Ecol. Sociobiol. 60, 87–95 (2006).
Solberg, E. J., Loison, A., Ringsby, T. H., Sæther, B. E. & Heim, M. Biased adult sex ratio can affect fecundity in primiparous moose Alces alces. Wildl. Biol. 8, 117–128 (2002).
Pipoly, I., Székely, T. & Liker, A. Multiple paternity is related to adult sex ratio and sex determination system in reptiles. Journal of Evolutionary Biology (under review).
Jones, A. G., Rosenqvist, G., Berglund, A., Arnold, S. J. & Avise, J. C. The Bateman gradient and the cause of sexual selection in a sex–role–reversed pipefish. Proc. R. Soc. Lond. Ser. B: Biol. Sci. 267, 677–680 (2000).
Clutton-Brock, T. H., Coulson, T. N., Milner-Gulland, E. J., Thomson, D. & Armstrong, H. M. Sex differences in emigration and mortality affect optimal management of deer populations. Nature 415, 633–637 (2002).
Google Scholar
Lambertucci, S. A., Carrete, M., Speziale, K. L., Hiraldo, F. & Donázar, J. A. Population sex ratios: another consideration in the reintroduction – reinforcement debate? PLoS ONE 8, e75821 (2013).
Google Scholar
Snyder, K. T., Freidenfelds, N. A. & Miller, T. E. X. Consequences of sex-selective harvesting and harvest refuges in experimental meta-populations. Oikos 123, 309–314 (2014).
Frankham, R. Effective population size/adult population size ratios in wildlife: a review. Genet. Res. 66, 95–107 (1995).
Sæther, B.-E. et al. Time to extinction in relation to mating system and type of density regulation in populations with two sexes. J. Anim. Ecol. 73, 925–934 (2004).
Milner, J., Nilsen, E. & Andreassen, H. Demographic side effects of selective hunting in ungulates and carnivores. Conserv. Biol.: J. Soc. Conserv. Biol. 21, 36–47 (2007).
Heinsohn, R., Olah, G., Webb, M., Peakall, R. & Stojanovic, D. Sex ratio bias and shared paternity reduce individual fitness and population viability in a critically endangered parrot. J. Anim. Ecol. 88, 502–510 (2019).
Google Scholar
Lee, P. L. M., Schofield, G., Haughey, R. I., Mazaris, A. D. & Hays, G. C. A review of patterns of multiple paternity across sea turtle rookeries. Adv. Mar. Biol. 79, 1–31 (2018).
Google Scholar
Wayne, A. F. et al. Sudden and rapid decline of the abundant marsupial Bettongia penicillata in Australia. Oryx 49, 175–185 (2015).
Roscoe, P. Dead Birds: The “Theater” of War among the Dugum Dani. Am. Anthropologist 113, 56–70 (2011).
Bethmann, D. & Kvasnicka, M. World war ii, missing men and out of wedlock childbearing. Economic J. 123, 162–194 (2013).
Schradin, C. et al. Geographic intra-specific variation in social organization is driven by population density. Behav. Ecol. Sociobiol. 74, (2020).
Brandner, J. L., Dillon, H. M. & Brase, G. L. Convergent evidence for a theory of rapid, automatic, and accurate sex ratio tracking. Acta Psychologica 210, (2020).
Griskevicius, V. et al. The financial consequences of too many men: sex ratio effects on saving, borrowing, and spending. J. Personal. Soc. Psychol. 102, 69–80 (2011).
Fritzsche, K., Booksmythe, I. & Arnqvist, G. Sex ratio bias leads to the evolution of sex role reversal in honey locust beetles. Curr. Biol. 26, 2522–2526 (2016).
Google Scholar
Bath, E. et al. Sex ratio and the evolution of aggression in fruit flies. Proc. R. Soc. B: Biol. Sci. 288, 20203053 (2021).
Beltran, S., Cézilly, F. & Boissier, J. Adult sex ratio affects divorce rate in the monogamous endoparasite Schistosoma mansoni. Behav. Ecol. Sociobiol. 63, 1363–1368 (2009).
Chuard, P., Brown, G. & Grant, J. The effects of adult sex ratio on mating competition in male and female guppies (Poecilia reticulata) in two wild populations. Behavioural Process. 129, 1–10 (2016).
Lande, R. Risks of population extinction from demographic and environmental stochasticity and random catastrophes. Am. Naturalist 142, 911–927 (1993).
May, R. & Allen, P. Stability and complexity in model ecosystems. Syst., Man Cybern., IEEE Trans. 44, 887–887 (1977).
Wobst, H. M. Boundary conditions for paleolithic social systems: a simulation approach. Am. Antiquity 39, 147–178 (1974).
Dyson, T. Causes and Consequences of Skewed Sex Ratios. (2012) https://doi.org/10.1146/annurev-soc-071811-145429.
Edlund, L. Son preference, sex ratios, and marriage patterns. J. Political Econ. 107, 1275–1304 (1999).
Hesketh, T. & Xing, Z. W. Abnormal sex ratios in human populations: causes and consequences. Proc. Natl Acad. Sci. USA 103, 13271–13275 (2006).
Google Scholar
Hesketh, T. & Min, J. M. The effects of artificial gender imbalance. EMBO Rep. 13, 487–492 (2012).
Google Scholar
Schacht, R. & Kramer, K. L. Patterns of family formation in response to sex ratio variation. PLoS ONE 11, e0160320 (2016).
Google Scholar
Schacht, R., Tharp, D. & Smith, K. R. Marriage markets and male mating effort: violence and crime are elevated where men are rare. Hum. Nat. 27, 489–500 (2016).
Google Scholar
Pouget, E. R. Social determinants of adult sex ratios and racial/ethnic disparities in transmission of HIV and other sexually transmitted infections in the USA. Philos. Trans. R. Soc. Lond. B Biol. Sci. 372, 20160323 (2017). An important study on humans that bridges the gap between theory and policy illustrating a societal issue related to sex ratio imbalance and sexually transmitted diseases risk in a vulnerable sub-population in the USA.
Google Scholar
Del Giudice, M. Sex ratio dynamics and fluctuating selection on personality. J. Theor. Biol. 297, 48–60 (2012).
Google Scholar
Schacht, R. & Borgerhoff Mulder, M. Sex ratio effects on reproductive strategies in humans. R. Soc. Open Sci. 2, 140402 (2015). A pioneering study of a small-scale population that demonstrates mating strategies vary with the sex ratio at local level.
Google Scholar
Jones, J. H. & Ferguson, B. Demographic and Social predictors of intimate partner violence in colombia: a dyadic power perspective. Hum. Nat. 20, 184–203 (2009).
Google Scholar
Uggla, C. & Mace, R. Local ecology influences reproductive timing in Northern Ireland independently of individual wealth. Behav. Ecol. 27, 158–165 (2016).
Guttentag, M. & Secord, P. Too Many Women? SAGE Publications Inc (1983). A landmark book that presented historical and quantitative evidence for how sex ratio skew impacts family structure and the societal values applied to men and women.
United Nations Population Fund Annual Report. https://www.unfpa.org/annual-report-2020 (2020)
Schmitt, D. P. Sociosexuality from Argentina to Zimbabwe: a 48-nation study of sex, culture, and strategies of human mating. Behav. Brain Sci. 28, 247–275 (2005).
Google Scholar
Baumeister, R. F. & Vohs, K. D. Sexual economics: sex as female resource for social exchange in heterosexual interactions. Pers. Soc. Psychol. Rev. 8, 339–363 (2004).
Google Scholar
Reid, P. C. et al. Global impacts of the 1980s regime shift. Glob. Change Biol. 22, 682–703 (2016).
Grafe, T. U. & Linsenmair, K. E. Protogynous sex change in the reed frog Hyperolius viridiflavus. Copeia 1989, 1024–1029 (1989).
Trochet, A. et al. Population sex ratio and dispersal in experimental, two-patch metapopulations of butterflies. J. Anim. Ecol. 82, 946–955 (2013).
Google Scholar
Thomson, D., Cooch, E. & Conroy, M. Modeling demographic processes in marked populations. https://doi.org/10.1007/978-0-387-78151-8 (2009).
Dail, D. & Madsen, L. Models for estimating abundance from repeated counts of an open metapopulation. Biometrics 67, 577–587 (2011).
Google Scholar
Kéry, M. & Royle, J. Andrew. Applied Hierarchical Modeling in Ecology: Analysis of distribution, abundance and species richness in R and BUGS. 783 (2015).
US Census Bureau. Accuracy and coverage evaluation of Census 2000: Design and Methodology. (2004).
Guillot, M. The dynamics of the population sex ratio in India, 1971-96. Popul. Stud. 56, 51–63 (2002).
Dyson, E. A. & Hurst, G. D. D. Persistence of an extreme sex-ratio bias in a natural population. Proc. Natl Acad. Sci. USA 101, 6520–6523 (2004).
Google Scholar
Hays, G. C., Mazaris, A. D., Schofield, G. & Laloë, J.-O. Population viability at extreme sex-ratio skews produced by temperature-dependent sex determination. Proc. R. Soc. B. 284, 20162576 (2017).
Google Scholar
Rózsa, L., Reiczigel, J. & Majoros, G. Quantifying parasites in samples of hosts. J. Parasitol. 86, 228–232 (2000).
Google Scholar
Cockburn, A., Scott, M. P. & Dickman, C. R. Sex ratio and intrasexual kin competition in mammals. Oecologia 66, 427–429 (1985).
Google Scholar
Douglas III, H. & Malenke, J. R. An Extraordinary Host-Specific Sex Ratio in an Avian Louse (Phthiraptera: Insecta)-Chemical Distortion? Environ. Entomol. (2015).
Bonnet, X. et al. A prison effect in a wild population: a scarcity of females induces homosexual behaviors in males. Behav. Ecol. 27, 1206–1215 (2016).
Beltran, S. & Boissier, J. Male-biased sex ratio: why and what consequences for the genus Schistosoma? Trends Parasitol. 26, 63–69 (2010).
Google Scholar
Beltran, S. & Boissier, J. Schistosome monogamy: who, how, and why? Trends Parasitol. 24, 386–391 (2008).
Google Scholar
Fisher, R. The Genetical Theory of Natural Selection (The Clarendon Press, 1930).
Houston, A. & McNamara, J. John Maynard Smith and the importance of consistency in evolutionary game theory. Biol. Philos. 20, 933–950 (2005).
Kokko, H. & Jennions, M. D. Sex differences in parental care. in The Evolution of Parental Care (Oxford University Press, 2012). https://doi.org/10.1093/acprof:oso/9780199692576.003.0006.
Fromhage, L. & Jennions, M. D. Coevolution of parental investment and sexually selected traits drives sex-role divergence. Nat. Commun. 7, 12517 (2016). A theoretical study showing that under a simple null scenario the sex ratio of male to female care does not evolve in response to ASR, but rather to the sex ratio at maturation.
Google Scholar
Long, X. The Evolution of Parental Sex Roles. PhD dissertation, University of Groningen (2020).
Seger, J. & Stubblefield, J. W. Models of sex ratio evolution. in Sex Ratios: Concepts and Research Methods (ed. Hardy, I. C. W.) 2–25 (Cambridge University Press, 2002). https://doi.org/10.1017/CBO9780511542053.002.
Pen, I. & Weissing, F. J. Optimal sex allocation: steps towards a mechanistic theory. in Sex Ratios: Concepts and Research Methods (ed. Hardy, I. C. W.) 26–46 (Cambridge University Press, 2002). https://doi.org/10.1017/CBO9780511542053.003.
Bodmer, W. & Edwards, A. Natural selection and the sex ratio. Ann. Hum. Genet. 239–244, (1960).
Sampson, R. J., Laub, J. H. & Wimer, C. Does marriage reduce crime? A counterfactual approach to within-individual causal effects. Criminology 44, 465–508 (2006).
Avakame, E. F. Sex ratios, female labor force participation, and lethal violence against women: extending Guttentag and Secord’s Thesis. Violence Women 5, 1321–1341 (1999).
Diamond-Smith, N. & Rudolph, K. The association between uneven sex ratios and violence: Evidence from 6 Asian countries. PLoS ONE 13, e0197516 (2018). One of the few studies on crime and sex ratios that uses individual-level data of reported crime as linked to area level sex ratio skew.
Google Scholar
Drèze, J. & Khera, R. Crime, gender, and society in India: Insights from homicide data. Popul. Dev. Rev. 26, 335–352 (2000).
Google Scholar
Edlund, L., Li, H., Yi, J. & Zhang, J. Sex ratios and crime: evidence from China. Rev. Econ. Stat. 95, 1520–1534 (2013).
Messner, S. F. & Sampson, R. J. The sex ratio, family disruption, and rates of violent crime: the paradox of demographic structure. Soc. Forces 69, 693–713 (1991).
Trent, K. & South, S. J. Mate availability and women’s sexual experiences in China. J. Marriage Fam. 74, 201–214 (2012).
Google Scholar
Filser, A., Barclay, K., Beckley, A., Uggla, C. & Schnettler, S. Are skewed sex ratios associated with violent crime? A longitudinal analysis using Swedish register data. Evolution Hum. Behav. 42, 212–222 (2021).
Barber, N. The sex ratio as a predictor of cross-national variation in violent crime. Cross-Cultural Res. 34, 264–282 (2000).
Barber, N. Countries with fewer males have more violent crime: marriage markets and mating aggression. Aggress. Behav. 35, 49–56 (2009).
Google Scholar
Obrien, R. M. Sex ratios and rape rates: a powercontrol theory. Criminology 29, 99–114 (1991).
Esmail, A. M., Penny, J. & Eargle, L. A. The impact of culture on crime. Race Gender Class 20, 326–343 (2013).
Pollet, T. V., Stoevenbelt, A. H. & Kuppens, T. The potential pitfalls of studying adult sex ratios at aggregate levels in humans. Philos. Trans. R. Soc. B: Biol. Sci. 372, (2017). A critical study that highlights shortcomings inherent in much of the early sex ratio literature, which stems in part from using nation- rather than local-level data.
Uggla, C. & Mace, R. Adult sex ratio and social status predict mating and parenting strategies in Northern Ireland. Philos. Trans. R. Soc. B: Biol. Sci. 372, 20160318 (2017). A seminal study on humans demonstrating the impacts of local sex ratio skew depending on individual status on the mating market.
Schacht, R. & Uggla, C. Beyond sex: reproductive strategies as a function of local sex ratio variation. in The Oxford Handbook of Human Mating (Oxford University Press, 2022).
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