Research concerning the feed digestibility and the digestive utilization coefficient in grass carp (Ctenopharingodon idella).
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2010, Vol 3, Issue 5
Abstract
The experiment was organized to investigate the recovery of additional food (fodder and terrestrial vegetation) given to fish, Ctenopharyngodon idella, in particular through the study of nutrient digestibility. Studied forage digestibility was determined through laboratory experiments, conducted between June 20 to 30, 2009, using 10 individuals of the species Ctenopharygodon idella from fish farm Movileni, Iași. There were formed two experimental groups, each of five individuals per group, differentiation between the two groups was the type of feed used respectively specific fodder and green clover green mass harvested in bud’s phase. To determine organic matter digestibility from feed we used the direct method, which consists in weighing all feed ingested, scrap feed and faeces removed. For this purpose in each aquarium was placed one fish, after which the tanks were covered with netting and set with oxygenation of the water pump. Statistical analysis of the data obtained from the experiment shows that the average values of the coefficients of digestibility of nutrients from fodder and green clover have been very significant differences. If we compare the mean values of digestibility coefficients of organic substances in the two types of forage (green clover and fodder) we can say that the fodder is digested and assimilated better than clover. Thus, in fodder at a protein content of 378.7 g / kg DM (dry matter), there was a digestibility coefficient of 92%, while at a lower protein content of 312.5 g / kg DM, in the case of green clover, the digestibility coefficient was 69%.
Authors and Affiliations
Valerica Gîlcă
Keywords
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