, Volume 446, Issue 1, pp 45–50

Variability for mixis initiation in Brachionus plicatilis

  • Eduardo Aparici
  • Maria José Carmona
  • Manuel Serra


Deductions from both evolutionary models and inductive argumentation from empirical data support the notion of intraspecific variability for the initiation of sexual reproduction (mixis) within rotifer populations. In this study, we focus on the time and density at which mixis is initiated in a growing population. Cyclical parthenogenetic clones of Brachionus plicatilis established by hatching of resting eggs, isolated from a natural habitat, have been tested at the start of their sexual phase. Clones exhibited great variation for this trait, their time of switching to sexual reproduction being correlated with population density. Most of the variation for mixis initiation has either low or no heritability and is caused by individual environmental factors.

rotifers sexual reproduction mixis initiation intraspecific variability 


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  1. Aparici, E., M. J. Carmona & M. Serra, 1996. Polymorphism in bisexual reproductive patterns of cyclical parthenogens. A simulation approach using a rotifer growth model. Ecol. Mod. 88: 133–142.Google Scholar
  2. Birky, C. W. & J. J. Gilbert, 1971. Parthenogenesis in rotifers: the control of sexuality and asexuality. Am. Zool. 11: 245–266.Google Scholar
  3. Buchner, H., 1941. Entwicklungsphysiologische Untersuchungen über den Determinationspunkt. Arch. Entwicklungsmech. Organ. 141: 145–158.Google Scholar
  4. Carmona, M. J., M. Serra & M. R. Miracle, 1993. Relationships between mixis in Brachionus plicatilis and preconditioning of culture medium by crowding. Hydrobiologia 255/256: 145–152.Google Scholar
  5. Carmona, M. J., M. Serra & M. R. Miracle, 1994. Effect of population density and genotype on life-history traits in the rotifer Brachionus plicatilis O.F. Mûller. J. exp. mar. Biol. Ecol. 182: 223–235.Google Scholar
  6. Carmona, M. J., A. Gómez & M. Serra, 1995. Mictic patterrns of the rotifer Brachionus plicatilis Müller in small ponds. Hydrobiologia 313/314: 365–371.Google Scholar
  7. Clément P. & R. Pourriot, 1976. Influences du groupement et de la densité de population sur le cycle de reproduction des rotifères. II. Comparaison de deux souches de Notommata copeus Ehrb. Arch. Zool. exp. gén.117: 5–13.Google Scholar
  8. Gilbert, J. J., 1974. Dormancy in rotifers. Trans. am. Micros. Soc. 93: 490–513.Google Scholar
  9. Gilbert, J. J., 1975. Polymorphism and sexuality in the rotifer Asplanchna, with special reference to the effects of prey-type and clonal variation. Arch. Hydrobiol. 75: 442–483.Google Scholar
  10. Gilbert, J. J., 1976. Polymorphism in the rotifer Asplanchna sieboldi. Variability in the body-wall-outgrowth response to dietary tocopherol. Physiol. Zool. 48: 404–419.Google Scholar
  11. Gilbert, J. J., 1977. Mictic-female production in monogonont rotifers. Arch. Hydrobiol. Beih. Ergebn. Limnol. 8: 142–155.Google Scholar
  12. Guillard, R. R. L. & J. H. Ryther, 1962. Studies of marine planktonic diatoms. I. Cyclotella nana Hustedt, and Detonula confervacea (Cleve). Can. J. Microbiol. 8: 229–239.Google Scholar
  13. Hagiwara, A., C. S. Lee, G. Miyamoto & A. Hino, 1989. Resting egg formation and hatching of the S-type rotifer Brachionus plicatilis at varying salinities. Mar. Biol. 103: 327–332.Google Scholar
  14. Iltis, A. & S. Riou-Duwat, 1971. Variations saissonniéres du peuplement en Rotiféres des eaux natron?es du Kanem (Tchad). Cahiers O.R.S.T.O.M. Seriés Hydrobiologie V, 2: 101–112.Google Scholar
  15. King, C. E. & T. W. Snell, 1980. Density-dependent sexual reproduction in natural populations of the rotifer Asplanchna girodi. Hydrobiologia 73: 149–152.Google Scholar
  16. Lubzens, E., G. Minkoff & S. Marom, 1985. Salinity dependence of sexual and asexual reproduction in the rotifer Brachionus plicatilis. Mar. Biol. 85: 123–126.Google Scholar
  17. Marcus, N. H., 1990. Calanoid copepod, cladoceran, and rotifer eggs in sea-bottom sediments of northern Californian coastal waters: identification, ocurrence and hatching. Mar. Biol. 105: 413–418.Google Scholar
  18. Pourriot, R. & P. Clément, 1981. Action de facteurs externes sur la reproduction et le cycle reproducteur des Rotifers. Acta Oecol. Gen. 2: 135–151.Google Scholar
  19. Pourriot, R. & T. W. Snell, 1983. Resting eggs in rotifers. Hydrobiologia 104: 213–224.Google Scholar
  20. Rougier, C. L. & R. Pourriot, 1977. Aging and control of the reproduction in Brachionus calyciflorus (Pallas) (Rotatoria). Exp. Gerontol. 12: 137–151.Google Scholar
  21. Ruttner-Kolisko, A., 1964. Ñber die labile Periode im Fortp-flanzungszyklus der Rádertiere. Inv. Rev. ges. Hydrobiol. 49: 473–482.Google Scholar
  22. Serra, M. & M. J. Carmona, 1993. Mixis strategies and resting egg production of rotifers living in temporally-varying habitats. Hydrobiologia 255/256: 117–126.Google Scholar
  23. Serra, M. & C. E. King, 1999. Optimal rates of bisexual reproduction in cyclical parthenogens with density-dependent growth. J. Evol. Biol. 12: 263–271.Google Scholar
  24. Snell, T. W. & E. M. Boyer, 1988. Thresholds for mictic female production in the rotifer Brachionus plicatilis (Müller). J. exp. mar. Biol. Ecol. 124: 73–85.Google Scholar
  25. Snell, T. W. & F. H. Hoff, 1985. The effect of environmental factors on resting egg production in the rotifer Brachionus plicatilis. J. World Marincult. Soc. 16: 484–497.Google Scholar
  26. Snell, T.W., B. E. Burke & S. D. Messur, 1983. Size and distribution of resting eggs in a natural population of the rotifer Brachionus plicatilis. Gulf Res. Rep. 7: 285–287.Google Scholar
  27. Wallace, R. L. & T. W. Snell, 1991. Rotifera. In Ecology and classification of North American freshwater invertebrates. Academic Press: 187–248.Google Scholar

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Eduardo Aparici
    • 1
  • Maria José Carmona
    • 2
  • Manuel Serra
    • 3
  1. 1.Institut “Cavanilles” de Biodiversitat i Biologia EvolutivaUniversitat de ValènciaValènciaSpain
  2. 2.Institut “Cavanilles” de Biodiversitat i Biologia EvolutivaUniversitat de ValènciaValènciaSpain
  3. 3.Institut “Cavanilles” de Biodiversitat i Biologia EvolutivaUniversitat de ValènciaValènciaSpain

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