Preliminary results on growth of the Polyodon spathula juveniles in recirculating system condition
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2011, Vol 4, Issue 2
Abstract
The main purpose of the present experiment consists in evaluating the growth performances of North-American sturgeon larvae (Polyodon spathula (Walbaum, 1792), raised in the recirculating system. Growth performance is influenced by many factors including food quality, quantity of food, culture species, fish size and water quality. The research was conducted between May 12th to June 8th, 2010, in the pilot laboratory of Department of Aquaculture, Environmental Science and Cadastre of the Faculty of Food Science and Engineering, Galaţi. Ewos type growing unit (1.40 x 1.40 x 0.40 m) was populated with 1500 larvae with an age of 72-120 hours and with an average weight of 8±0.2 mg/larva. During the experiment the physico-chemical water parameters were within the admissible limit of sturgeons growth (temperature 4-26oC, dissolved oxygen 5-14 mg L-1, pH 6.5-8.5, N-N03-1-20 mg L-1,N-NO2-0-0.01 mg L-1, N-NH4+0.05-2 mg L-1). The experiment results indicated a 78% survival and anindividual body biomass of 1.15 ± 0.21 g. The research goal is to achieve the following objectives:a.optimization of feeding parameters (ratio, fodders type and frequency) and the efficiency of different fodders types usage (conversion signs of fodders); b. providing the conditions for the biological material adaptation to the growth condition of the recirculating system.
Authors and Affiliations
Marian Coadă, Neculai Patriche, Victor Cristea, Mioara Costache, Săndiţa Ion (Plăcintă)
Keywords
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