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Parental Effects On Sex Ratios In Progeny Of The European Sea Bass (Dicentrarchus Labrax)

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Title: Parental Effects On Sex Ratios In Progeny Of The European Sea Bass (Dicentrarchus Labrax)
Authors: Gorshkov, S.
Meiri, I.
Rosenfeld, H.
Ben-Atia, S.
Lutzki, S.
show 5 morePeduel, A.
Ron, B.
Skvortzov, A.
Gorshkova, G.
Tandler, A.

show less
Keywords: Dicentrarchus labrax , dimorphism, parental effects, sexual growth, sex ratio
LC Subject Headings: Fish culture--Israel--Periodicals.
Fish culture--Periodicals.
Aquaculture--Israel--Periodicals.
Aquaculture--Periodicals.
Issue Date: 2003
Publisher: Israeli Journal of Aquaculture - BAMIGDEH
Citation: Gorshkov, S., Meiri, I., Rosenfeld, H., Ben-Atia, S., Lutzki, S., Peduel, A., Ron, B., Skvortzov, A., Gorshkova, G., & Tandler, A. (2003). Parental Effects On Sex Ratios In Progeny Of The European Sea Bass (Dicentrarchus Labrax). The Israeli Journal of Aquaculture - Bamidgeh, 55(4), 265-273.
Series/Report no.: The Israeli Journal of Aquaculture - Bamidgeh
Abstract: In European sea bass (Dicentrarchus labrax), females grow 20-50% faster than males. Therefore, they are more in demand than males for commercial farming, generating much inter- est in the development of female monosex populations. Whereas most current research focus- es on the influence of temperature on sex determination, the present experiments aimed at studying parental effects on sex ratios in progeny. The study analyzed progeny resulting from a diallel crossing (2 x 2 type or a complete bi-factorial mating design), reflecting both maternal and paternal genetic relatedness among progeny. The proportion of females varied significantly among families (20.7-68.2%). There were significant maternal and paternal effects on the pro- portion of females among the progeny. The effect of the parental interaction on the sex ratio in the progeny was also significant. Parents had a significant effect on total length and body weight. Sexual growth dimorphism, in favor of females, was evident in all the full-sib families and varied significantly between families. Among offspring at 9-9.5 months (68.9±23.7 g), females were 26.6% heavier than males. It is concluded that in addition to temperature manipulation in sea bass, as proposed in earlier studies, selection of parents will probably result in an improved ratio of female to male progeny.
Pages/Duration: 9 pages
URI/DOI: http://hdl.handle.net/10524/19088
ISSN: 0792-156X
Appears in Collections:IJA Volume 55, Issue 4, 2003



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