Prospects for sex role reversal in teleost fishes
In: Netherlands Journal of Zoology. E.J. Brill: Leiden. ISSN 0028-2960; e-ISSN 1568-542X, more
Also appears in:Osse, J.W.M.; Hollingworth, C.E. (Ed.) (1992). The Threatened World of Fish: Proceedings of the 7th International Ichthyology Congress, The Hague (The Netherlands), August 26-30, 1991. Netherlands Journal of Zoology, 42(2-3). E.J. Brill: Leiden. 524 pp., more
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| Abstract |
Teleost fishes, by virtue of their diverse reproductive modes, offer an opertunity to address general questions about the evolution of sex differences. A comparison of the reproductive rates of males and females within a species or population provides an emperical basis for predicting which sex will compete more intensely for acces to mate and thus be subject to stronger sexual selection: it wil be the sex with the higher maximum reproductive rate. In order to assess relative reproductive rates in teleost fishes, and to test this principle, four reproductive measures are needed for each species or population: (1) maximum female clutch size (2) minimum female interclutch interval, (3) maximum female brood size (relative to clutch size), and (4) minimum interbrood interval for males (relative to interclutch interval). This reproductive rates approach should reveal more examples of sex role reversal in teleost and could contribute to the development of hitherto largely unformulated generalisation about sex differences in teleost fishes. |
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