Studies on the growth and maturity of Gold fish, Carassius auratus using differnet lipid sources

摘要

Gold fish popular among aquarium keepers due to its unique shape, coloration and hardiness. It is the most common and sought after species of aquarium fish. Therefore, its trade is oever increasing at the national as well as international level. At present, share of India in the international level is very small. One reason for this is the non-availability of the method for controlled and continues breeding of the gold fish. In the present work, an attempt was made to active growth and maturity the gold fish, C. auratus diets (feed I, II, III, IV, V, VII, VIII, IX) were prepared with different combinations of lipid sources like egg yolk, vegetable oil and shark liver oil combination with wheat flour, prawn shell powder, fish meal, mineral mixture etc. The nine feeds having different lipid levels were separately tested on C. auratus fry having an average length and weight 27 mm and 310 mg respectively. The best average growth 0.448 mm (length) and 36 mg per day was obtained by feed III which was comprised with fish meal, prawn shell powder, wheat flour and mineral mixture alorigwith 15% of lipid (egg yolk). Since feed III (15% yolk based feed) stimulated the faster growth and early maturation within 3 months, it can be used for the production of fry round the year, and can help the industry in the sphere of exports as well as in domestic market.