Pengaruh Variasi Debit Air terhadap Konsentrasi Oksigen Terlarut pada Pemelihara Benih Ikan Nila di Kolam Beton

Abstract

This study aims to analyze the effect of water flow rate variations on dissolved oxygen (DO) concentration and survival rate of Nile tilapia (Oreochromis niloticus) in concrete ponds. Three treatments were employed: no pump, pump with a flow rate of 1200 L/h, and pump with a flow rate of 1800 L/h. Measurements were conducted over five days with three observation sessions (morning, afternoon, and evening) for each treatment. The results show that using a pump with a flow rate of 1200 L/h resulted in stable DO concentrations ranging from 5-7 ppm and a higher survival rate of fish, specifically 95%, compared to treatments without a pump (70%) and with a pump at 1800 L/h (85%). Correlation analysis indicates a significant positive relationship between water flow rate and dissolved oxygen concentration, with the 1200 L/h flow rate achieving an optimal balance between water circulation and turbulence. Other water quality parameters such as temperature and pH were also monitored and indicated optimal conditions for Nile tilapia growth. This study recommends the use of a pump with a flow rate of 1200 L/h for Nile tilapia aquaculture in concrete ponds to achieve optimal results and production sustainability.