Seed production businesses play an important role in providing seeds to be bred. The obstacles to raising knifefish in ponds are the high level of mortality and the availability of natural food, the availability of which cannot be continuous. The aim of this activity is to determine the growth performance of knifefish seeds using a recirculation system as a maintenance medium withh artificial feed. The purpose of this activity is to determine the growth performance of knifefish fry using a recirculation system as a maintenance medium with artificial feed.
The method used in this activity is an experimental method carried out indoors. The eel fish used are post-yolk release eel fry that have a length of 1.5-1.8 cm. In this engineering activity, 2 test treatments were carried out, each of which was repeated 2 times. The first treatment is the maintenance of belida fish fry using artificial feed. While the second treatment is the maintenance of knifefish seeds with artificial feed and silk worms. Each treatment uses a recirculation system with feeding twice a day, morning and evening. Variables observed included absolute growth, specific growth, daily specific growth rate and survival rate.
From the results of these activities, the absolute growth of knifefish seeds with artificial feed and silk worms is better than knifefish seeds with artificial feed, which is 0.82 with artificial feed and silk worms and 0.71 with artificial feed. For relative growth parameters, the results obtained were 2867.95% for artificial feed and silk worms and 1811.33% for artificial feed. The daily specific growth rate was 7.78%/day for artificial feed and silk worms and 6.78%/day for artificial feed. The results for the survival rate parameter also showed that the treatment using artificial feed and silk worms was better than artificial feed with values of 80.50% and 69.75%, respectively.