THE EFFECT OF STOCKING FISH PRODUCTION ON THE QUALITY OF WATER DISCHARGED FROM THE HATCHERY
Małgorzata Bonisławska 1  
,   Arkadiusz Nędzarek 1  
,   Agnieszka Rybczyk 1  
,   Beata Żuk 1  
,   Marlena Socha 1  
,   Adam Tański 1  
,   Agnieszka Tórz 1  
,   Sebastian Gronowski 1,   Rafał Pender 2  
 
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1
Wydział Nauk o Żywności i Rybactwa, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie, ul. K. Królewicza 4, 71-550 Szczecin
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Okręg Polskiego Związku Wędkarskiego w Szczecinie, ul. Mickiewicza 3, 70-383 Szczecin
CORRESPONDING AUTHOR
Małgorzata Bonisławska   

Zakład Sozologii Wód, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie, ul. K. Królewicza 4b, 71-550 Szczecin, Polska
Publication date: 2016-09-09
 
Inż. Ekolog. 2016; 49:143–150
 
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ABSTRACT
The aim of this study was to assess the effect of a fish hatchery (Stocking-Breeding Centre in Goleniów -OHZ), focused on the production and on-growing of stocking material, on the quality of post-production water. The following parameters were determined: dissolved oxygen, organic matter content, buffering capacity, the concentration of some forms of nitrogen and phosphorus ((N-NH4+, N-NO2, N-NO3-, total nitrogen, P-PO43-, total phosphorus) and the concentration of chloride ions. The study also included the measurements of water temperature, electrolytic conductivity and pH. It was shown that the water supplied to the hatchery had good quality, providing optimum conditions for growth and living of fry and juvenile forms of various fish species (most indices were within the range of the first water quality class). Production activities at the hatchery caused a reduction in the quality of discharged post-production water with respect to indicators such as total suspended solids, organic matter and phosphorus.