Peer-reviewed articles 17,970 +


Title: GROWTH OF THE NORTH AMERICAN STURGEON ( POLYODON SPATHULA ) DURING THE POST-EMBRYONIC DEVELOPMENT PERIOD IN PROTECTED AREAS
GROWTH OF THE NORTH AMERICAN STURGEON ( POLYODON SPATHULA ) DURING THE POST-EMBRYONIC DEVELOPMENT PERIOD IN PROTECTED AREAS

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Mioara Costache; Daniela Radu; Nino Marica; Mihail Costache; Mariana Cristina Arcade
10.5593/sgem2023/3.1/s12.08
10.5593/sgem2023/3.1
1314-2704
978-619-7603-58-3
English
23
3.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Hydrology and Water Resources
The article includes the results obtained in the growth experiments during the postembryonic development period of the North American sturgeon species Polyodon spathula. The experiments took place in the years 2020 and 2021. Sturgeon larvae aged 5 days old, obtained through artificial reproduction at SCDP Nucet, were stocked and raised until the age of 35 days in two variants, in concrete tanks (useful volume -120 m3 /tank), located in the pilot station intended for fish culture experiments from the SCDP Nucet genetic library. The experimental variants consisted in testing the support capacity of the tanks when stocked with sturgeon larvae in densities of 40,000 ex/tank, respectively 333 specimens/m3 (V1); and 20,000 ex/tank respectively, 166 ex/m3 (V2). The sturgeon larvae were fed with zooplankton ( Moina sp., Daphnia sp.) and artificial feed. Feeding regime was found to contribute significantly to final size and growth rate. In variant 1 (V1) sturgeon fry with an average mass of 7.4 g/ex. were obtained (survival rate of 30.3 %) and in the second variant the sturgeon fry recorded an average mass of 9.8 g/ex. (survival rate 48.4%). The differences in survival between the two variants of the rearing experiments were due to the fact that the adaptation to artificial feed was made more difficult. Also, overcrowding causes typical manifestations that consist in the appearance of large differences between individuals that favor cannibalism.
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https://doi.org/10.5593/sgem2023/3.1/s12.08
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Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023
23rd International Multidisciplinary Scientific GeoConference SGEM 2023, 03 - 09 July, 2023
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
61-70
03 - 09 July, 2023
website
9131
Polyodon spathula, protected areas, concrete tanks, sturgeon larvae, stocking density

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