Assessment of the Risk Level for Carp Welfare Based on the Water Quality in RAS

Renata RELIC, Milos CIRIC, Marijana VUCINIC, Brana RADENKOVIC-DAMNJANOVIC, Vesna POLEKSIC, Zoran MARKOVIC

Abstract


In this paper results of the risk level assessment of carp welfare (Cyprinus carpio) in recirculating aquaculture system (RAS) are presented. We used different quantitative nutrition levels (3% and 4% of feed) and examined changes of the water quality in tanks during first, second and third month of the experiment. The risk assessment is based on carp needs regarding optimal ranges of water temperature, dissolved oxygen (DO), and suggested upper level of unionized ammonia (NH3-N) content. According to the results, average values of the water temperature and DO were in optimal range. The average content of NH3-N was above recommended level. Water quality was deteriorated along with duration of experiment. In the first period i.e. first month of the experiment welfare risk in both groups is at the lowest level and the highest in the last period. The total score is higher in group fed with 4% of feed then in group which received 3% of feed.

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DOI: http://dx.doi.org/10.15835/buasvmcn-vm:1:68:6782


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