Investigation on weight increase in Ctenopharyngodon idella species

Abstract

Ctenopharyngodon idella species was fed with aquatic vegetation. Groups E1, and E1(r) achieved higher weight increases in comparison with the fish belonging to the control group, fed with mixed fodder. At E1 and E1(r ), the mean daily increase was of 3.1 g and at the control group, of 2.9 g. At E1, the index of aquatic vegetation consumption was of 28.8, respectively, 28.3 in E1(r). The consumption index for mixed fodder was of 5.27 at the control group, a great value if we take into account the value of the consumption index of 2, quoted by the specialty literature. At E2, fishes, which were fed with mixed fodder and aquatic vegetation, obtained a mean daily increase of 3.2 g, greater than the increase of 2.9 g at the control and 3.1 g at E1 and E1(r). Therefore, Ctenopharyngodon idella consumed and capitalized well the aquatic vegetation due to some specific features of the digestive system, preferring the mixed fodder, when the aquatic vegetation was insufficient.