The effect of dietary
vitamin E on the pleopodal egg and stage-1 juvenile numbers of freshwater
crayfish Astacus leptodactylus (Eschscholtz, 1823)
M.M. Harlıoğlu, Ö. Barım-2004
Aquaculture, 267-276
Abstract:
The effect of vitamin E on the pleopodal egg and
stage-1 juvenile number of freshwater crayfish, Astacus leptodactylus
was investigated. Crayfish were fed daily 2% of their total wet weight with
vitamin E supplemented diets and a control for 272 days. The vitamin E
contents of the control diet, diet 1, diet 2, and diet 3 were 66, 100, 150
and 200 mg/kg, respectively, on a dry weight basis. Vitamin E levels of the
control and experimental diets were analysed by high performance liquid
chromatography. Results showed that diet 1 containing 100 mg/kg supplemental
vitamin E was associated with a significant increase (p<0.001) in
the number of pleopodal eggs and stage-1 juvenile. In addition, the females
fed with diet 1 produced significantly bigger pleopodal eggs (p<0.001).
(Aquaculture Faculty, Fırat University, Elazığ,
Turkey, e-mail: mharlioglu@firat.edu.tr)