Feeding regimes and optimal feeding frequency of farmed great sturgeon larvae (Huso huso)

Document Type : Tarvij

Authors

1 International Sturgeon Research Center

2 International sturgeon research Institute

3 International Sturgeon Research Institute

4 International Sturgeon research Institute

5 International Sturgeon Research Institute,

6 International Sturgeon Research Institute- Rasht- Iran

Abstract

   With the aim of determining the best feeding frequency and type of feedind regimes, great stutgeon (Huso huso) larvae were fed with different feeding regimes, including: Chironomid larvae, Artemia biomass (juvenile and adult stages of Artemia nauplii), Daphnia, Artemia nauplii and microdiet (with a size of 100-300 µ) 6 and 12 times a day. The survival rate of larvae (average of different feeding regimes) during 12 times feedings per day was 35.14% higher than 6 times feeding per day. The weight gain of larvae (average of all different feeding regimes), in feeding 6 times a day, was 2.35% more than feeding 12 times a day. Considering the greater importance of larval survival rsate, compared to weight gain, this issue is important. Also, taking into account the reasonable price and ease of supply of Artemia biomass compared to chironomid larvae, favorable results can be obtained by using more Artemia biomass (75%) along with chironomid larvae and microdiet, and even using Daphnia or Artemia biomass without chironomid larvae. 

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