Aquaculture International

, Volume 22, Issue 1, pp 205–214

Growth performance, feed intake and morphology of juvenile European catfish, Silurus glanis (L.) fed diets containing different protein and lipid levels

Authors

  • Krzysztof Florczyk
    • Division of Inland Fisheries and Aquaculture, Institute of ZoologyPoznan University of Life Sciences
    • Division of Inland Fisheries and Aquaculture, Institute of ZoologyPoznan University of Life Sciences
  • Katarzyna Przybylska
    • Division of Inland Fisheries and Aquaculture, Institute of ZoologyPoznan University of Life Sciences
  • Dariusz Ulikowski
    • Department of Sturgeon BreedingInland Fisheries Institute
  • Mirosław Szczepkowski
    • Department of Sturgeon BreedingInland Fisheries Institute
  • Wojciech Andrzejewski
    • Division of Inland Fisheries and Aquaculture, Institute of ZoologyPoznan University of Life Sciences
  • Janusz Golski
    • Division of Inland Fisheries and Aquaculture, Institute of ZoologyPoznan University of Life Sciences
Article

DOI: 10.1007/s10499-013-9667-0

Cite this article as:
Florczyk, K., Mazurkiewicz, J., Przybylska, K. et al. Aquacult Int (2014) 22: 205. doi:10.1007/s10499-013-9667-0

Abstract

The study was carried out with juvenile European catfish to evaluate the effects of commercial diets on growth, feed utilization and changes of selected morphometric traits of fish. Three diets containing different levels of crude protein and lipid: 37 and 12 %, 45 and 15 %, 45 and 20 %, respectively, were fed to triplicate groups of European catfish for 50 days. The fish were fed continuously (24 h day−1) by automatic belt feeders for fish with a clock drive. Biometric characteristics of fish included the determination of plasticity traits using modified Pravdin method. Fish growth rate and final body weight were statistically higher in variant 45/20 diet (specific growth rate of 2.6 % day−1). The intergroup significant differences were recorded for food conversion ratio (FCR) and protein efficiency ratio (PER), during the particular decades of the experiment. For the whole period of the growth test, no significant differences in FCR were observed, but the most favorable values of PER were obtained in variant 37/12. Protein retention in fish body ranged from 18.7 to 21.0 %, and fat retention was significantly more variable, ranged from 87.5 to 121.3 %. Fish survival rate recorded during the growth test was higher in all variants (above 95 %). Statistically significant increases in protein and lipid content were found in fish fed diets 45/15 and 45/20. The tested diets have no effect on changes in fish body proportions. The most effective in juvenile European catfish rearing was diet with 45 % of crude protein and 20 % of lipid.

Keywords

European catfish Silurus glanis L. Dietary protein and lipids Growth Morphology

Copyright information

© Springer Science+Business Media Dordrecht 2013