Intensive rearing of wels (Silurus glanis L.) using plant protein based feed
Keywords:
wels, intensive rearing, plant protein, growthAbstract
In order to replace growingly expensive fish meal, plant based feeds were compared to commercial wels (Silurus glanis) feed in a 60 days experiment. Three types of feed were applied: squealer feed (S), squealer feed combined with forage fish (S+F) and commercial wels feed (W). The feed conversion ratio was 0.88 ± 0.21 at the W group, 1.74 ± 0.21 at the S and 1.48 ± 0.23 in the case of S + F group. Specific growth rate was higher at wels feed (2.34%), than in case of the squealer feed (1.77%) or squealer feed with forage fish addition (1.95%). The slaughter loss was the least at the fish fed with forage fish in addition (34.6 ± 2.0%). The relative size of the liver (2.8 ± 0.32% of body weight) and the fat % of the viscera (4.1 ± 1.0% of body weight) were significantly higher at W group than those of the other treatments.
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