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Growing Scampi (Giant Prawn) in Banaskantha

A hands-on guide to starting and managing giant freshwater prawn (scampi) culture in Banaskantha. Covers site selection, pond construction, stocking, feeding, and common problems.

Ranjeet Natarajan
Ranjeet Natarajan August 9, 2026 6 min read 1,094 words
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Growing Scampi (Giant Prawn) in Banaskantha

Why consider scampi farming in Banaskantha

Macrobrachium rosenbergii (commonly called scampi or giant freshwater prawn) is suited to inland freshwater culture and can be grown in Banaskantha using seasonal irrigation or groundwater. The crop fits well into small- to medium-sized farms as a high-value, short-rotation enterprise that can integrate with carp polyculture or use dedicated ponds. Success depends on careful water-management, reliable seed supply and appropriate feed and aeration.

Site selection and water

Choose a site with a dependable water source and soil that holds water (clay or silty clay) to reduce seepage. In Banaskantha you will often use dug wells, borewells or reservoirs fed from canal/monsoon runoff. Key water parameters to target:

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  • Temperature: ideally 26–32°C for fast growth; growth slows below 22°C.
  • pH: 7.0–8.5; avoid acidic water.
  • Dissolved oxygen (DO): maintain >4 mg/L during the day; avoid prolonged night-time dips below 3 mg/L.
  • Hardness and alkalinity: moderate (helps stability); test locally and correct with lime if needed.

Test your water for salinity only if mixing with brackish sources—M. rosenbergii tolerates low salinity but is typically cultured in freshwater.

Pond design and preparation

Ponds can be earthen or lined. Practical design points:

  • Size: small family ponds (0.05–0.5 ha) are common and easier to manage.
  • Depth: 1–1.5 m for grow-out; nursery/settling tanks shallower (0.5–0.8 m).
  • Bank design: gentle slopes for access; protect banks to prevent erosion.
  • Inlets/outlets: mesh screens on inlet pipes to prevent predator entry and to allow controlled water exchange.
  • Aeration: provide power and space for paddlewheels or diffused aeration if stocking intensively or during hot months.

Before stocking, dry the pond, remove predators and vegetation, apply lime (to correct pH and sanitise), and fill slowly. Fertilize with organic manure and/or inorganic fertilizers if you plan to use natural productivity to reduce feed costs.

Varieties and seed (PL) sourcing

Macrobrachium rosenbergii is the main cultured species in India and widely available. Source post-larvae (PL) or juveniles only from reputable, certified hatcheries. Requirements:

  • Buy PL of uniform size and health; request health certificates and supplier references.
  • Acclimatize PL slowly to pond conditions to reduce shock (drip acclimation over 30–60 minutes).
  • Consider stocking during warmer months when temperatures support growth (local timing depends on annual temperature patterns).

Stocking densities and systems

Stocking density depends on management intensity and available oxygen/aeration:

  • Extensive/low input (natural feed): 1–3 PL/m2.
  • Semi-intensive: 4–8 PL/m2 with supplementary feed and periodic aeration.
  • Intensive (with continuous aeration and formulated feed): higher densities are possible but require good management and biosecurity.

Polyculture with carps is possible—carp species occupy different niches and can improve feed conversion and pond productivity. If using polyculture, reduce prawn stocking to avoid competition.

Feed and nutrition

Good feed management is central to performance. Options include farm-made feeds using local ingredients or commercial shrimp/prawn feeds. Guidelines:

  • Protein: feeds with ~30–40% crude protein work for grow-out; use higher early-phase protein for juveniles.
  • Feeding rate: adjust by biomass and observed appetite; feed 3–5% of body weight early and reduce as growth slows, splitting daily rations into 2–3 feedings.
  • Use sinking pellets or moist pellets—prawns are bottom feeders.
  • Monitor feed conversion by tracking feed input and weight gain.

Combine feed with fertilization to maintain natural productivity, which lowers feed costs and provides a varied diet.

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Water quality management

Regular monitoring and proactive water management increase survival and growth:

  • Measure DO, pH, temperature, ammonia and nitrite routinely—daily to weekly depending on intensity.
  • Prevent ammonia build-up by avoiding overfeeding and by using partial water exchange or biofiltration when needed.
  • Maintain vegetation strips and organic matter controls; remove uneaten feed and decaying plant material.
  • Aerate during hot months and at night if DO dips are frequent.

Disease prevention and biosecurity

Healthy management reduces disease risk. Practical steps:

  • Buy healthy seed from certified hatcheries and quarantine new batches when possible.
  • Control movement of people and equipment between ponds; use footbaths and dedicated gear.
  • Maintain pond hygiene—remove dead or moribund animals promptly and inspect for unusual mortality patterns.
  • Record mortalities, feed use and water parameters to detect problems early.
  • Consult local fisheries extension or a veterinarian for diagnostic testing if you see unexplained mortalities.

Predator control and shelter

Predation by birds, fish and amphibians can reduce yields. Reduce risk by:

  • Using net covers during early stages or at night if birds are a problem.
  • Removing wild fish and predators during pond preparation.
  • Providing structured habitats (bundles of bamboo, brush, or PVC shelters) which give prawns refuges and reduce cannibalism among larger individuals.

Growth, sampling and harvest

Growth period depends on temperatures, feed and stocking density; under common conditions grow-out to market sizes usually takes 4–7 months. Management tips:

  • Sample every 4–6 weeks to monitor average weight and adjust feed accordingly.
  • Harvest progressively (partial harvesting) when portions reach marketable size to spread income and reduce overcrowding.
  • Use seines, lift nets or trap-style harvesting; handle prawns gently to reduce stress and damage.
  • Plan market outlets in advance—local fresh markets, processors or traders—and meet buyer size and quality expectations.

Seasonal and local considerations for Banaskantha

Banaskantha has semi-arid conditions and a distinct monsoon. Consider these local adaptations:

  • Plan stocking to coincide with warmer months and when water supply is reliable—avoid starting large crops right before cool spells.
  • Use groundwater or harvested monsoon water; ensure sufficient volume for DO management and partial exchanges if ammonia rises.
  • Protect water access during dry months—store sufficient reserve in farm reservoirs.
  • Energy and aeration: ensure backup power or diesel generators for aerators during critical periods.

Economics and record-keeping

Keep clear records of seed costs, feed, fertilizers, labor, aeration fuel/electricity, and sales. Key recommendations:

  • Start small—pilot one pond to learn local responses before scaling up.
  • Track feed conversion and survival; these drive profitability.
  • Explore value-adding options like size grading, live transport, or local processing to improve returns.

Where to get help

Contact the local District Fisheries Office, Krishi Vigyan Kendra (KVK) or fisheries extension agents for region-specific advice, seed supplier lists and training. A local consultant or experienced neighboring farmer can be invaluable for first-season troubleshooting.

Final practical checklist

  • Confirm water availability and test basic parameters before pond construction.
  • Source PL from a reputable hatchery and acclimatize carefully.
  • Prepare ponds (drying, liming, fencing, inlet/outlet screens).
  • Decide stocking density based on your aeration and feed plan.
  • Monitor water quality, feed carefully, and aerate as needed.
  • Keep records and start small—scale up after one successful crop.

With attention to water quality, seed health and feeding, scampi farming can be a viable complementary enterprise in Banaskantha. Practical, local learning and good record-keeping will rapidly improve results from season to season.

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Ranjeet Natarajan
Ranjeet Natarajan

Contributing writer at Agriculture Novel — telling the stories that sustain us.

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