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Schartl, M.* ; Erbelding-Denk, C. ; Hölter, S.* ; Nanda, I.* ; Schmid, M.W.* ; Schröder, J.H. ; Epplen, J.T.*

Reproductive failure of dominant males in the poeciliid fish Limia perugiae determined by DNA fingerprinting.

Proc. Natl. Acad. Sci. U.S.A. 90, 7064-7068 (1993)

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Hierarchical structures among male individuals in a population are frequently reflected in differences in aggressive and reproductive behavior and access to the females. In general, social dominance requires large investments, which in turn then may have to be compensated for by high reproductive success. However, this hypothesis has so far only been sufficiently tested in small mating groups (one or two males with one or two females) due to the difficulties of determining paternity by conventional methods. DNA fingerprinting overcomes these problems by offering the possibility to determine genetic relationships and mating patterns within larger groups [Burke, T. (1989) Trends Ecol. Evol. 4, 139-144]. We show here that in the poeciliid fish Limia perugiae, in small mating groups the dominant male has a mating success of 100%, whereas in larger groups its contribution to the offspring unexpectedly drops to zero.

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