Summary
Sex allocation theory is developed for polygynous eusocial Hymenoptera in which nests recruit their own daughters as new reproductive queens. Such restricted dispersal of females leads to the expectation of male-biased investment ratios. The expectation depends on the parameter q telling what proportion of the total contribution in the gene pool by all new queens is due to those dispersing. Under queen control the expected sex allocation, expressed as the proportion of resources invested in males, is IM =1/(1 + q). Under worker control, IM depends on the relatedness of old queens, on the number of males they have mated with, and on the proportion of males produced by workers. With single mating and no worker reproduction, the approximate predictions for IM are 1/(1 + q) when the nests have many highly related queens, 1/(1 + 2 q) when the old queens are as related as average worker nest mates, and 1/(1 + 3q) when the old queens are not related to each other at all. The observed investment ratios in polygynous ants would, on average, match values of the parameter q between 0.4 and 0.5. Values of q have not been estimated in nature. If q is smaller than 0.4, which may well be true, the observed sex allocation in polygynous ants is in fact more female-biased than predicted by the theory. This indicates that the female bias found in monogynous ants may not be exceptional and could be due to factors other than worker control of sex allocation. Because the value of q is likely to vary among species, testing the predictions of the theory requires thorough single-species studies.
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References
Alpert GD, Akre RD (1973) Distribution, abundance, and behavior of the inquiline ant Leptothorax diversipilosus. Ann Entomol Soc Am 66:753–760
Benford FA (1978) Fisher's theory of the sex ratio applied to the social Hymenoptera. J Theor Biol 72:721–727
Boomsma JJ (1989) Sex investment ratios in ants: has female bias been systematically overestimated? Am Nat 133:517–532
Buschinger A, Francoeur A, Fischer K (1980) Functional monogyny, sexual behavior, and karyotype of the guest ant, Leptothorax provancheri Emery (Hymenoptera, Formicidae). Psyche 87:1–12
Clutton-Brock TH, Harvey PH (1984) Comparative approaches to investigating adaptation. In: Krebs JR, Davies NB (eds) Behavioural ecology: an evolutinary approach, 2nd edn. Blackwell Scientific Publications, Oxford, pp 7–29
Crozier RH (1979) Genetics of sociality. In: Hermann HR (ed) Social insects, vol 1. Academic Press, New York, pp 223–286
Douwes P, Sivusaari L, Niklasson M, Stille B (1987) Relatedness among queens in polygynous nests of the ant Leptothorax acervorum. Genetica 75:23–29
Droual R (1982) Sex ratios in the ant Pheidole desertorum. Am Zool 22:971
Elmes GW (1987) Temporal variation in colony populations of the ant Myrmica sulcinodis IL. Sexual production and sex ratios. J Anim Ecol 56:573–583
Fowler HG, Roberts RB (1982) Seasonal occurrence of founding queens and the sex ratio of Camponotus pennsylvanicus (Hymenoptera: Formicidae) in New Jersey. JNY Entomol Soc 90:247–251
Frank SA (1987) Variable sex ratio among colonies of ants. Behav Ecol Sociobiol 20:195–201
Hagen RH, Smith DR, Rissing SW (1988) Genetic relatedness among cofoundresses of two desert ants Veromessor pergandei and Acromyrmex versicolor. Psyche 95:191–201
Have TM van der, Boomsma JJ, Menken SBJ (1988) Sex-investment ratios and relatedness in the monogynous and Lasius niger (L.). Evolution 42:160–172
Herbers JM (1984) Queen-worker conflict and eusocial evolution in a polygynous ant species. Evolution 38:631–648
Kim CH, Murakami Y (1980) Ecological studies on Formica yessensis Forel, with special reference to its effectiveness as a biological control agent of the pine caterpillar moth in Korea II. Bionomics of Formica yessensis Forel (Hymenoptera: Formicidae) in Korea. J Fac Agric Kyushu Univ 25:119–133
Lepage MG, Darlington JPEC (1984) Observations on the ant Carebara vidua F. Smith preying on termites in Kenya. J Nat Hist 18:293–302
Nonacs P (1986) Ant reproductive strategies and sex allocation theory. Q Rev Biol 61:1–21
Pamilo P (1981) Genetic organization of Formica sanguinea populations. Behav Ecol Sociobiol 9:45–50
Pamilo P (1982) Genetic population structure in polygynous Formica ants. Heredity 48:95–106
Pamilo P (1990) Evolution of colony characteristics in social insects I. Sex allocation. Am Nat (in press)
Pamilo P, Rosengren R (1983) Sex ratio strategies in Formica ants. Oikos 40:24–35
Pamilo P, Rosengren R (1984) Evolution of nesting strategies of ants: genetic evidence from different population types of Formica ants. Biol J Linn Soc 21:331–348
Pamilo P, Varvio-Aho S (1979) Genetic structure of nests in the ant Formica sanguinea. Behav Ecol Sociobiol 6:91–98
Peacock AD (1951) Studies in pharaoh's ant, Monomorium pharaonis (L.) (5) Pupal and adult sex ratios. Entomol Mon Mag 87:185–191
Pearson B (1982) Relatedness of normal queens (macrogynes) in nests of the polygynous ant Myrmica rubra Latreille. Evolution 36:107–112
Pollock GB, Rissing SW (1985) Mating season and colony foundation of the seed-harvester ant, Veromessor pergandei. Psyche 92:125–134
Rosengren R, Pamilo P (1986) Sex ratio strategy as related to queen number, dispersal behaviour and habitat quality in Formica ants (Hymenoptera: Formicidae). Entomol Generalis 11:139–151
Rosengren R, Cherix D, Pamilo P (1986) Insular ecology of the red wood ant Formica truncorum Fabr. II. Distribution, reproductive strategy and competition. Mitt Schweiz Entomol Ges 59:63–94
Starr CK (1984) Sperm competition, kinship, and sociality in the aculeate Hymenoptera. In: Smith RL (ed) Sperm competition and the evolution of animal mating systems. Academic Press, New York, pp 427–464
Taylor PD (1988) Inclusive fitness models with two sexes. Theor Popul Biol 34:145–168
Trivers RL, Hare H (1976) Haplodiploidy and the evolution of the social insects. Science 191:249–263
Ward PS (1983) Genetic relatedness and colony organization in a species complex of ponerine ants. II. Patterns of sex ratio investment. Behav Ecol Sociobiol 12:301–330
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Pamilo, P. Sex allocation and queen-worker conflict in polygynous ants. Behav Ecol Sociobiol 27, 31–36 (1990). https://doi.org/10.1007/BF00183310
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DOI: https://doi.org/10.1007/BF00183310