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Larval behaviour and effect of the timing of initial feeding on growth and survival of Siberian sturgeon (Acipenser baeri) larvae under small scale hatchery production

Abstract : Behaviour of larval Siberian sturgeon and the effect of the timing of first feeding (5, 7, 9, 11, 13, 15 and 17 d post hatch) of a dry commercial diet were examined at 18°C. Results confirm the importance of the initial feeding time and suggest that food should be offered to sturgeon larvae at 9 d after hatching, coinciding with the disappearing of schooling behaviour, the scattering of larvae across the bottom of the tank and the apparent full resorption of yolk-sac reserves. Feeding Siberian sturgeon larvae during the phase of transition between yolk-sac nutrition to exogenous feeding (5-7 days post hatch), did not provide any advantage. Expulsion of melanin plug can not really be used to determinate the time of transition to active feeding, as it appears to be a consequence of first feeding.
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https://hal.inrae.fr/hal-02578093
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Submitted on : Thursday, May 14, 2020 - 6:43:20 PM
Last modification on : Saturday, June 25, 2022 - 9:18:20 PM

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  • HAL Id : hal-02578093, version 1
  • IRSTEA : PUB00005587

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E. Gisbert, Patrick Williot. Larval behaviour and effect of the timing of initial feeding on growth and survival of Siberian sturgeon (Acipenser baeri) larvae under small scale hatchery production. Aquaculture, 1997, 156 (1-2), pp.63-76. ⟨hal-02578093⟩

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