Acta Ichthyologica et Piscatoria 27(1): 41-51, doi: 10.3750/AIP1997.27.1.03
Comparative analysis of results of using different food rations in juvenile wels (Silurus glanis) culture
expand article infoJ. Filipiak, J. Sadowski, R. Trzebiatowski

Corresponding author: J. Filipiak

© J. Filipiak, J. Sadowski, R. Trzebiatowski.
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Citation: Filipiak J, Sadowski J, Trzebiatowski R (1997) Comparative analysis of results of using different food rations in juvenile wels (Silurus glanis) culture. Acta Ichthyologica et Piscatoria 27(1): 41-51. https://doi.org/10.3750/AIP1997.27.1.03
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Abstract
Groups of “small” (65 ± 10 g/indiv.) and “large” (110 ± 10 g/indiv.) wels (Silurus glanis) kept for 49 days in cages in cooling water, were fed with semi-extruded feed offered in 5 different doses (1%, 1.5%, 2%, 2.5%, 3%), calculated relatively to the individual metabolic fish weight (W0.8). The feed contained 48.5% crude protein, 14.4% lipids and 20.97 KJ/g gross energy. The experiment showed that, at the water temperature range of 24-28°C, the daily feed demand was identical in both groups of wels and amounted to 2% W0.8, while at 18-23°C it did not exceed 1.5% W0.8.