Human factor

• The stocking density of fish in the pond is 3-5 fish/square meter.

• If the fish density is too high, it will cause the fish to lack oxygen and feed, which can cause the fish to get disease.

• Fish pond management and feeding according to feeding techniques will make the fish healthy and grow well. On the other hand, if thefeeding is not done properly according to the techniques, such as feeding unsanitary feed, not cleaning the pond, etc., the pond will become dirty and contain viruses that will make the fish disease.

• Injuring fish when catching fish or fishing nets, causing injuries to fish during transportation or transfer to another pond, makes fish susceptible to microbial invasion.