Abstract
The hybridogenetic fish complex Squalius alburnoides comprises diploid males with non-hybrid nuclear genomes and several hybrid forms varying in ploidy and relative proportions of the parental genomes. In this paper, we present evidence that in captivity females prefer to mate with non-hybrid males. We suggest that female choice combined with different ecological requirements of hybrid and non-hybrid males may explain the extreme variation in the relative abundance of male types among drainages.
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Acknowledgements
The authors wish to thank R. Sousa-Santos for help in sample collection, J. Robalo and T. Bento for help in maintaining the fish tank and two anonymous referees that helped to improve the text with interesting suggestions. The study was funded by the FCT Pluriannual Program (UI&D 331/94 and UI&D 329/94) (FEDER participation). C. Sousa-Santos was supported by a Ph.D grant from FCT (SFRH/BD/8320/2002). A permit for field work was provided by “Direcção Geral dos Recursos Florestais”. The procedures involved in fish capture, observations and maintenance are in full agreement with the Portuguese and European laws and regulations, namely, those pertaining to animal welfare and wildlife conservation.
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Sousa-Santos, C., Collares-Pereira, M.J. & Almada, V. Reproductive success of nuclear nonhybrid males of Squalius alburnoides hybridogenetic complex (Teleostei, Cyprinidae): an example of interplay between female choice and ecological pressures?. acta ethol 9, 31–36 (2006). https://doi.org/10.1007/s10211-006-0012-8
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DOI: https://doi.org/10.1007/s10211-006-0012-8