Growth parameters of carp fed mixtures containing different levels and origin of proteins
2012
Stanković, Marko (Faculty of Agriculture, Belgrade (Serbia)) | Poleksić, Vesna (Faculty of Agriculture, Belgrade (Serbia)) | Lakić, Nada (Faculty of Agriculture, Belgrade (Serbia)) | Dulić, Zorka (Faculty of Agriculture, Belgrade (Serbia)) | Živić, Ivana (Faculty of Biology, Belgrade (Serbia)) | Marković, Zoran (Faculty of Agriculture, Belgrade (Serbia))
The aim of this research was to study growth performances of carp yearlings fed mixtures with different shares of total proteins, and different protein origin. 90 days experiment was carried out in the Laboratory for Fish Nutrition, at the University of Belgrade, Faculty of Agriculture. Feed mixtures with total protein content of 38.1% (diet A), 38.5% (diet B), 41.5% (diet C), and 43.7% (diet D), originating from different sources: fishmeal, full fat soybean meal, and yeast were applied. Statistical analysis of data obtained through control measurements on 30 day intervals, showed differences in growth parameters between treatments. Fish fed a diet dominated by fishmeal and the total protein content of 43.7%, achieved the greatest weight gain and feed utilization. Fish fed diets with 41.5% protein and an equal proportion of fishmeal and full fat soybean meal in the mixture, had better feed utilization and greater weight gain than fish fed mixtures with the highest amount of soybean meal and lower content of total proteins. The obtained results indicate that in addition to protein levels, their origin and the share in mixtures significantly affect the utilization of feed and growth of cultured fish. Full fat soybean meal, that has similar protein content, amino acid composition and approximate digestibility as fishmeal, if present in higher amount in mixtures with lower share of total proteins, result in poorer feed efficiency and lower growth of cultured fish.
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