Abstract
Among a variety of fish mating systems, promiscuity with random-mating seems to be most prevalent. However, detailed studies of promiscuity have been rare due partly to the peculiar difficulty in examination of male mating and reproductive success in the random mating. Females of the armoured catfish Corydoras aeneus (no sexual dimorphism other than size of males > females) spawn 10–20 egg-clutches with multiple males at a time, but an entire egg clutch is inseminated by sperm of a single male. We studied mating system of this fish in aquarium. Males had neither mating territories nor monopolized females, never being aggressive against rival males. Evidence of female preference for certain male traits including size was not detected. Females mated a male in proportion to his relative courtship frequency among males. Courtship frequency was not related to male size, and male mating success was not different between small and large males. Clutch size and insemination rate were different neither between small and large males nor between frequently and less frequently courting males. Thus, the male reproductive success will not be related to the male size, but directly to courtship frequency, indicating the random mating in this fish. There seemed to be fecundity advantage with size in female, and the consequent sexual difference in energy allocation will be responsible to the sexual dimorphism. We also discuss the low male-GSI in this promiscuous fish in which sperm competition hardly occurred.
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References cited
Andersson, M. 1994. Sexual selection. Princeton University Press, Princeton. 599 pp.
Barlow, G.W. 1991. Mating systems among cichlid fishes. pp. 173–190. In: M.H.A. Keenleyside (ed.) Cichlid Fishes: Behaviour, Ecology and Evolution, Chapman and Hall, London.
Breder, C.W. & D.E. Rosen.1966. Modes of reproduction in fishes. Natural History Press, Garden City. 941 pp.
Birkhead, T.R. 1996.Sperm competition: evolution and mechanism. Cur. Topic. Dev. Biol. 33: 103–158.
Birkhead, T.R & A.P. Moller. 1992. Sperm competition in birds. Academic Press, New York. 282 pp.
Birkhead, T.R. & A.P. Moller. 1998. Sperm competition and sexual selection. Academic Press, New York. 826 pp.
Burgess, W.E. 1987. A complete introduction to Corydoras and related catfishes. T.F.H. Publications, Neptune City.128 pp.
Burgess, W.E. 1989. An atlas of freshwater and marine catfishes. T.F.H. Publications, Neptune City. 784pp.
Conover, D.O. 1984. Adaptive significance of temperate dependent sex determination in a fish. Amer. Nat.123: 297–313.
Endler, J.A. 1983. Natural and sexual selection on color patterns in poeciliid fishes. Env. Biol.Fish. 9: 173–190.
Forsgren, E. 1997. Mate sampling in a population of sand gobies. Anim. Behav. 53:267–276.
Hay, D.E. & D. McPhail. 1975. Male selection in threespine sticklebacks (Gasterosteus). Can. J.Zool. 53: 441–450.
Knapp, R.A. & J.T. Kovach. 1991. Courtship as an honest indicator of male parentalquality in the bicolor damselfish, Stegastes partitus. Behav. Ecol. 2: 295–300.
Kohda, M., M. Tanimura, M. Kikue-Nakamura & S. Yamagishi. 1995. Sperm drinking by female catfishes: a novel mode of insemination. Env. Biol. Fish. 42: 1–6.
Matsuzaka, M. 1993. All about Corydoras. Aqua Magazine 17: 3–17 (inJapanese).
Pruzsinszky, I. & F. Ladich. 1998. Sound production and reproductive behaviour of the armoured catfishCorydoras paleatus (Callichthyidae). Env. Biol. Fish. 53: 183–191.
Singer, M.C. 1982. Sexual selection forsmall size in male butterflies. Amer. Nat. 119: 440–443.
Stockley, P., M.J.G. Gage, G.A. Parker & A.P. Moller. 1997. Sperm competition in fishes: the evolution of testis size and ejaculate characteristics. Amer. Nat. 149: 933–954.
Takahashi, D. 2000. Studies on the reproductive ecology of a freshwater goby in the genusRhinogobius. Ph. D. thesis, Osaka City University, Osaka. 102 pp.
Warner, R.R. 1975. The adaptive significance ofsequential hermaphroditism in animals. Amer. Nat. 109: 61–82.
Warner, R.R. 1984. Mating behavior andhermaphroditism in coral reef fishes. Amer. Sci. 72: 128–136.
Warner, R.R & R.K. Harlan. 1982.Sperm competition and sperm storage as determinants of sexual dimorphism in the dwarf surfperch, Micrometrus minimus. Evolution 36: 44–55.
Wootton, R.J. 1990. Ecology of teleost fishes. Chapman and Hall, London. 404pp.
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Kohda, M., Yonebayashi, K., Nakamura, M. et al. Male Reproductive Success in a Promiscuous Armoured Catfish Corydoras Aeneus (Callichthyidae). Environmental Biology of Fishes 63, 281–287 (2002). https://doi.org/10.1023/A:1014317009892
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DOI: https://doi.org/10.1023/A:1014317009892