Enhancement of the production of turbot, Scophthalmus maximus (L.), larvae by controlling overripening in mature females |
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| Authors: | C FAUVEL M H OMNES M SUQUET Y NORMANT |
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| Institution: | Institut Français pour l' Exploitation de la Mer, Centre de Brest, Plouzane, France |
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| Abstract: | Abstract. In turbot, Scophthalmus maximus (L.), daily examination of broodstock females should be a hatchery management practice in terms of fry output. Eggs expelled shortly after ovulation by systematic stripping of females five times a week had high viability (72%) compared to eggs collected twice a week (46%), while handling frequency did not have any effect on female fecundity (total number of ovulated eggs per kg of female). Increase of stripping frequency raised hatching rates and larva production respectively from 11% to 35% and from 20000 to 65000 larvae/kg of spawning female. The enhancement of egg quality and of the resulting larva production are discussed. |
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