Peculiarities of growth of age-1+ paddlefish (Polyodon spathula Walbaum, 1792) in conditions of a pond fish farm in the forest-steppe of Ukraine

Purpose. To investigate the peculiarities of growth age-1+ paddlefish depending on water temperature and quantitative parameters zooplankton development in ponds forest-steppe zone Ukraine. Methodology. Age-1+ paddlefish, a North American zooplanktophagus were reared polyculture with cyprinids 72-hectare pond using semi-intensive technology. The stocking density age-1 an average weight 86.5 g was 59 fish/ha, total 2,402 fish/ha for all objects polyculture. intensification measures included fertilization traditional organic fertilizers feeding carp feed mixtures based waste from processing agricultural raw materials plant origin. study intensity natural food supply physicochemical carried out according to methods generally accepted hydrobiology hydrochemistry. Determination piscicultural characteristics common ichthyology dynamics body gains absolute relative values. Findings. conditions environment during most period rearing met biological requirements this species. A periodic decrease content oxygen dissolved 3.3-3.5 mgO2/dm3 noted, which could negatively affect fish. Water fish breeding varied between 9.8-26.5oC. seasonal biomass phytoplankton 16.49 mg/dm3 3.92 g/m3, respectively, predominance Cladocera Copepoda (respectively, 61.0 34.5% biomass) composition zooplankton. As result, reached 1318.3 productivity 45.6 kg/ha 1162.6 kg/ha. Maximum 4.25–4.37% per day observed first half growing season (mainly June) at 22–25oC increase 3.79 10.11 g/m3. Originality. New data obtained environmental Forest-Steppe Practical value. results can be used process improving aquaculture technologies Key words: aquaculture, growth, zooplankton, temperature.