Environmental load of wels (Silurus glanis) fed by feeds of different protein levels
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2013, Vol 6, Issue 1
Abstract
The most dangerous effect of the environment on traditional and intensive fish farming is the released nutriment loaded effluent water. Intensity is increased and the nutriment intake by artificial feeds cannot be utilized all by fish. Parts of these remain in the system in particulate or dissolved form and begin to accumulate, may cause insufficient water quality. During our experiment we examined the environmental effects of three different feeds of different protein levels. The declared crude protein contents of feeds were 33%, 40% and 49%. At the beginning of our research, catfish were fed by feeds of 1% of bodyweight. We measured the inorganic dissolved nitrogen forms of water before adding nourishment and after in the 6th, 12th, 24th, 36th, 48th, 60th and 72nd hours. Before sampling we checked the main physical and chemical parameters of water which are essential to analysis. With regard to the results, the concentrations of ammonium nitrogen were permanently increased in control and also in the other treatments during the 72h examined period.
Authors and Affiliations
Gábor Beliczky, Máté Havas, Sándor Németh, Miklós Bercsényi, Dénes Gál
Keywords
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