Effects of upper and lower water circulation system with solar energy for fish breeding in earth pond

Abstract

One of the important issues in the field of aquaculture is the insufficient energy, where the culture pond is far away. Nowadays solar cell equipment is cost-effective and easier to install in the system for customers. Breeding directly in the pond and rearing until reaching the desired size can enhance the efficiency of aquaculture. To achieve this, it is crucial to manage and control the dissolved oxygen level (DO) by using water pumps or air blowers. This present study was aimed to compare the performance of two prototypes of water circulation systems with solar energy. Divided the outlet pipe of system into two groups according to direction of the water outlet including above water (T1) and under water (T2). Then breeding a 172.6±113.7 g silver barb with three replicates and then comparing the total number of eggs, fertilized eggs, fertilization rate, number of fries and hatching rate from both groups. The result showed that total number of eggs, fertilized eggs and fertilization rate were not significant (p>0.05). For the number of fries, it has significantly difference between groups (p<0.05). In addition, the hatching rate of T1 was highly different from T2 (p<0.01). In the of water quality there was no differences between groups (p>0.05). Although the data of this study was quite low when compare with other experimental about fish breeding due to the water flow rate in the circulation system is too strong. Based on the result of this study the above water circulation system was better than underwater circulation system when breeding directly in the pond.