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Abstract

Growth Response and Feed Utilization Efficiency of Common Carp

Three aquatic weeds namely hornwort (Ceratophyllum demersum), longleaf pondweed (Potamogeton nodosus) and fringed water lily (Nymphoides peltata) were analyzed for proximate composition of nutrients. It was observed that crude protein (%) in Nymphoides peltata was (25%) which was comparatively higher than Potamogeton nodosus (22.57%) and Ceratophyllum demersum (24.15%) respectively. Similarly the percentage dry matter content showed a high value for Nymphoides peltata (93.60%) as compared to Potamogeton nodosus (91.50%) and Ceratophyllum demersum (90.46%) respectively. The crude fat in Nymphoides peltata (5,64%) was significantly higher than Potamogeton nodosus (4.75%) and Ceratophyllum demersum (3.60%) respectively. Nymphoides peltata with higher %age of protein was selected to be incorporated into the feed of Common carp to ascertain growth and feed utilization efficiency. Four isonitrogenous (CP:35%) and isocaloric (3500Kcal/kg) practical diets were formulated and Nymphoides peltata were added @ of 15% (T1), 30% (T2) and 45% (T3) tested diets and the peltata with higher %age of protein was selected to be incorporated into the feed of Common carp to ascertain growth and feed utilization efficiency. Four isonitrogenous (CP:35%) and isocaloric (3500Kcal/kg) practical diets were formulated and Nymphoides peltata were added @ of 15% (T1), 30% (T2) and 45% (T3) tested diets and the control diet was formulated with 0.0% Nymphoides peltata. Fish with an average weight (8.95±1.1 g.) were fed on the tested diets at 5% body weight for 8 weeks. Results indicate that the fish fed with the tested diet (T3) had a significantly higher weight gain (17.09±0.55) and specific growth rate (1.106 ± 0.01) as compared to the control group (P < 0.05). FCR decreased significantly in fish fed diets containing Nymphoids peltata @ 45%. The FCR and PER was significantly (P<0.05) different from the control group. FCR (2.81±0.19) was lowest in the T3 group and highest PER (1.78±0.07) was observed in the T3 group as compared to control group. Mortality was recorded during the feeding trial and lowest mortality was observed in control group followed by T3 group.


Author(s):

Pramella B



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