Turning lower energy cost into higher pond productivity

By Dr. Wiphada Mitbumrung, Ph.D. Applied Marine Biosciences — Wed Aug 19 2026

In shrimp farming, profitability is determined not only by how cheaply one kilogram of shrimp can be produced, but by how efficiently the farm converts and manages resource capacity into marketable biomass. Feed and electricity are two of the most important variable costs in shrimp farming. Feed commonly represents the largest share of production expenditure. Especially in intensive shrimp production have reported feed accounting for around two-thirds of production cost. Electricity is important because continuous mechanical aeration is required as shrimp biomass and oxygen demand increase.

In August 2026, the Government of Andhra Pradesh confirmed that eligible aquaculture farmers can receive electricity at ₹1.50 per unit, compared with the APERC aquaculture tariff of approximately ₹3.85 per unit, with the government covering the difference of ₹2.35 per unit. This represents a considerable reduction in one of the major operating expenses of shrimp production. The immediate effect of an electricity subsidy is obvious: production cost per kilogram decreases. However, simply producing the same quantity of shrimp with cheaper electricity captures only a small part of the potential economic benefit. Shrimp farmers sometimes focus heavily on achieving the lowest possible production cost. While cost control is important, profitability ultimately depends on the relationship between:

Profit = Harvest biomass × Farm-gate price − Total production cost

Therefore, a farm with a low production cost can still lose money when the market price falls below its break-even level. This situation was clearly observed in Andhra Pradesh during 2026. In June, farmers reported that approximately 100-count Vannamei shrimp were selling for around ₹240/kg, while production costs were estimated at approximately ₹250/kg. For 60-count shrimp, farmers reported production costs approaching ₹330/kg, while market prices were around ₹300/kg. Under these conditions, even a well-managed farm with relatively efficient production could still experience losses. The problem is therefore not simply "How can we produce cheaper?" More importantly, the subsidy should not encourage farmers simply to operate unnecessary equipment continuously. The real opportunity is to use affordable electricity strategically to increase productive capacity.

Aeration determines pond carrying capacity

As stocking density increases, standing shrimp biomass increases. More feed is introduced, respiration increases, organic matter accumulates and microorganisms consume additional oxygen. Consequently, the oxygen requirement of the pond rises sharply as the crop progresses. Aeration therefore serves several purposes simultaneously. It supplies oxygen to shrimp, supports aerobic microorganisms involved in decomposition and nutrient transformation, circulates water vertically and horizontally, reduces oxygen stratification and helps maintain suitable pond-bottom conditions. Due to the fact that aerator electricity represents a major component of direct energy use in shrimp production. However, energy should be matched to biomass rather than simply running maximum aeration throughout the entire crop. When electricity becomes cheaper, farmers have an opportunity to install adequate aeration capacity and operate it according to pond biomass and dissolved oxygen demand. This creates a pathway toward higher carrying capacity. When stocking density is increased carefully and survival remains acceptable, the same pond area can generate substantially greater harvest biomass.

The objective is not only maximum stocking density

Carrying capacity is controlled by more than dissolved oxygen. Increasing shrimp density also increases feed input, faecal waste, ammonia production, bacterial activity and oxygen consumption. Poorly managed intensive ponds can therefore develop ammonia accumulation, unstable plankton, excessive organic matter, Vibrio proliferation, poor bottom conditions and eventually disease. Higher stocking must therefore be accompanied by stronger water quality management. Farm care products intended for intensive farming can support this objective when they are selected according to actual pond conditions. Beneficial microorganisms can support organic matter decomposition and nutrient cycling. Appropriate mineral management can support moulting and ionic balance. Plankton and water-quality management can help maintain ecological stability, while bottom-management can reduce accumulation of organic waste.

Turn the subsidy into production, not only savings

Consider two farmers receiving the same electricity subsidy.

Farmer A maintains exactly the same stocking density, same aeration capacity and same production strategy. His electricity bill decreases, giving him perhaps several rupees of additional margin per kilogram.

Farmer B uses part of the electricity saving to improve aeration capacity, dissolved oxygen management, pond circulation and farm-care management. After confirming that the pond infrastructure can safely support more biomass, stocking and production are gradually increased.

Farmer B may achieve a greater economic advantage because the subsidy is being converted into productive capacity rather than only cost reduction. This becomes particularly important when farm-gate prices are weak.

Conclusion

The real value of electricity support to Andhra Pradesh aquaculture should therefore be measured beyond the reduction in the electricity bill. Government electricity subsidies create a valuable economic buffer for farmers. The best use of this advantage is not simply to celebrate a lower electricity bill. It is to reinvest part of that saving in the biological and mechanical capacity of the pond. Ultimately, the most profitable farmer may not be the farmer with the lowest cost per kilogram. It is the farmer who can consistently produce a high quantity of healthy shrimp with an efficient use of feed, electricity, land and water, while remaining flexible enough to survive periods of weak farm-gate prices. In this way, electricity subsidy can become more than financial assistance. Used intelligently, it can become a tool for increasing productivity, strengthening farm resilience and making intensive shrimp farming in Andhra Pradesh more competitive.