Abstract
The study was conducted to compare the effect of three different fry rearing systems such as: hapa, cistern and pond on the growth and survival of goldfish (Carassius auratus ) fry. A total of 645 fry (mean initial weight: 0.0071 mg) were randomly distributed in the three treatments (systems) each having three replications. The stocking density was same in all the treatments with respect to the water volume of the systems which was 10 fry/hapa, 125 fry/cistern and 80 fry/pond. The trial lasted for 40 days. The water quality parameters were favorable in all the treatments during the period of the study. The growth and survival of goldfish fry varied among the systems. Highest average weight gain and specific growth rate (SGR) were observed in pond followed by hapa and cistern. On the other hand, survival rate was highest in cistern followed by hapa and pond. It can be concluded from the study that the pond was the best system in terms of growth rate and cistern was the best system for survival of gold fish fry.Res. Agric., Livest. Fish.2(2): 301-306, August 2015
Highlights
Gold fish is the most popular ornamental fish used in Bangladesh
Priestley (2005) reported that with suitable water quality in cisterns and 4-6 times feeding frequency all the fish remained healthy with no mortalities. From this experiment we found that the growth rate was very high in pond than other two systems the survival rate was low in pond
Ornamental fish hatcheries are comparatively low though the breeding techniques are quite easy
Summary
Gold fish is the most popular ornamental fish used in Bangladesh. There are very few established hatcheries in the country where breeding of gold fish is performed. If fry are reared in jars or aquarium it may be expensive because cost will be incurred in the development of such system. They will have to be used with utmost care otherwise they will not last for long. Growth and survivability of fry vary among the systems This is mainly due to differences in water quality parameters and availability of natural food. If maintained properly, these systems may be suitable for gold fish fry rearing. The study was carried out to compare the effects of different rearing systems on the growth and survival of gold fish fry
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