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Scampi (Giant Prawn) Farming in Saurashtra: Sowing to Sale

This hands-on guide walks Saurashtra growers through scampi (giant prawn) culture from pond preparation and seed selection to harvest and sale, with practical tips for local conditions.

Ranjeet Natarajan
Ranjeet Natarajan August 9, 2026 6 min read 1,163 words
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Scampi (Giant Prawn) Farming in Saurashtra: Sowing to Sale

Overview

Scampi (giant river prawn, commonly farmed as Macrobrachium sp.) can be a profitable aquaculture option in Saurashtra where brackish and freshwater resources exist. This guide covers practical steps from site selection and nursery management to harvesting and selling, focusing on scalable, farm-ready practices rather than theoretical details.

Choose the right site and system

Scampi can be grown in pond-based systems—freshwater, low-salinity or brackish—earthen ponds, lined ponds, or tanks. Key site considerations:

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  • Water source: reliable groundwater, canal water, or tidal brackish water with low pollutants. Ensure year-round supply.
  • Topography: flat land with gentle gradient for pond layout and outlet drainage.
  • Soil type: clayey soils are preferred for earthen ponds to retain water. Sandy soils need liners.
  • Accessibility: close to markets and transport to reduce post-harvest losses.

Pond design and preparation

Design ponds with practical management in mind:

  • Size and depth: small earthen ponds of 0.1–0.5 ha are common for new growers; depth 1–1.5 m with a shallow feeding shelf (0.4–0.6 m) along one side to observe behaviour and feed.
  • Banking and sluice gates: firm banks, separate inlet and outlet structures for water exchange, and a reliable drain for complete emptying during harvest or treatment.
  • Lining: use HDPE lining for sandy soils or tanks to prevent seepage.
  • Preparation: drain and dry the pond, remove vegetation, lime at recommended rates (based on soil tests) to improve pH and reduce pathogens, then refill slowly with clean water.

Water quality management

Maintain stable water quality—scampi are tolerant but perform best within safe ranges:

  • Temperature: scampi grow well in warm conditions typical of Saurashtra; avoid sudden temperature swings during stocking.
  • pH: keep near neutral to slightly alkaline (consult local extension for target range based on species).
  • Dissolved oxygen (DO): maintain DO above 4 mg/L, especially at night; aeration may be required in intensive setups.
  • Ammonia and nitrites: monitor and keep as low as possible—avoid overfeeding and overcrowding; perform partial water exchanges when needed.
  • Salinity: some Macrobrachium species tolerate low salinity; if using brackish water, stabilize salinity before stocking.

Seed selection and nursery management

Healthy post-larvae (PL) or juveniles are crucial. Options: purchase PL from certified hatcheries or farm your own if you have hatchery skills.

  • Choose disease-free, vigorous PL. Inspect supplier reputation and health certificates when available.
  • Nursery: acclimatize PL gradually to pond water. Use nursery hapa or separate shallow nursery ponds. Provide shelter (bamboo bundles or PVC tubes) to reduce cannibalism.
  • Nursery feeding: diet of commercial microfeed and natural productivity (fertilization) until juveniles reach stocking size (varies by farmer practice).

Stocking density and grow-out

Stocking density depends on system intensity and management capacity:

  • Extensive/semi-intensive earthen ponds: lower densities are safer—this reduces disease risk and feed cost. Use shelter and manage natural productivity.
  • Semi-intensive/intensive systems: higher densities with aeration and formulated feeds—but require tighter monitoring of water quality and disease.
  • Provide shelters throughout the pond (PVC pipes, coconut shells, stone piles) to reduce aggression and cannibalism, particularly during moulting.

Feeding and nutrition

Feeding is a major cost and determinant of growth. Practical feeding steps:

  • Use a high-protein commercial prawn feed formulated for Macrobrachium or a quality shrimp feed. Pellet size should match prawn size.
  • Feed 2–3 times daily in daylight, adjusting quantity according to appetite and water temperature. Remove uneaten feed to prevent water quality decline.
  • Supplement with natural productivity: fertilize ponds (manure or inorganic fertilizers) to boost natural food, but avoid over-fertilization that causes oxygen crashes.

Disease prevention and health management

Prevention beats treatment. Practical health steps:

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  • Biosecurity: limit movement between ponds, disinfect equipment and footwear, and avoid introducing wild-caught broodstock or untested seed.
  • Quarantine new seed or broodstock for at least 7–10 days and observe for abnormal behaviour or mortalities.
  • Water management: avoid sudden changes, maintain DO, and control ammonia and nitrite with water exchange or biofilters.
  • Watch for signs: excessive mortality, lethargy, discoloured animals, or abnormal moulting. Consult local fish health labs or extension if signs appear—don’t rely on unverified chemical remedies.

Harvesting

Harvest strategy depends on market and size targets:

  • Partial harvest: remove marketable-size prawns periodically to maintain growth of remaining stock and generate cash flow.
  • Complete harvest: drain the pond or use seine nets; sorting tables allow grading by size. Handle prawns gently to minimize stress and damage.
  • Post-harvest handling: keep prawns in cool, oxygenated water or iced slurry immediately after harvest to preserve quality for market.

Processing and value-add

Basic options to improve returns:

  • Live sale to local markets or exporters—requires rapid transport and good aeration.
  • Chilled/iced whole prawns—common for domestic markets.
  • Processing (head-on/head-off) and frozen products fetch higher prices but need investment in cold chain and hygiene.
  • Consider collective schemes or farmer groups to access processing facilities and larger buyers.

Marketing and pricing

Successful selling is local and practical:

  • Know demand: restaurants, retail markets, processors and exporters have different size and quality requirements. Match your production plan to clear buyer preferences.
  • Build relationships: regular contracts with buyers reduce price risk. Deliver consistent quality and sizes.
  • Certificates and traceability: buyers increasingly expect basic traceability and hygiene records—keep production logs (seed source, feed, medicines, harvest dates).

Economics and risk management

Scampi farming can be profitable but carries risks. Keep these practical points in mind:

  • Start small: pilot a few ponds to acquire skills before scaling up.
  • Cost tracking: record all input costs—seed, feed, fertilizer, utilities, labour—to know your break-even price.
  • Diversify: combine scampi with fish or seasonal crops on pond banks to spread risk.
  • Insurance and contingency: where available, consider crop-insurance schemes and keep an emergency plan for disease or drought.

Local considerations for Saurashtra

Saurashtra presents particular practicalities:

  • Water availability and salinity: check seasonal fluctuations in groundwater and local salinity trends; design ponds and stocking timing around the most reliable water windows.
  • Heat and evaporation: provide shade for water in small tanks and manage water losses during hot months—top up ponds with good-quality water to maintain volume and salinity.
  • Input sourcing: identify reliable local suppliers for seed, feed and aeration equipment. Join local farmer groups to share experience and bulk-buy inputs.
  • Extension support: engage with the local fisheries department or KVKs for training, seed certification and health diagnostics.

Checklist before you start

  • Secure a reliable water source and test water quality.
  • Prepare at least one pilot pond and nursery facility.
  • Identify seed supplier and establish seed health verification.
  • Plan for aeration, feed supply, shelters and post-harvest handling.
  • Establish buyer contacts or market channels in advance.

Final practical tips

  • Observe—spend time at ponds daily, learn behaviour patterns and early signs of stress.
  • Keep simple records—stocking dates, feed amounts, mortalities and water parameters—to learn what works.
  • Start gradual: increase stocking density only after you can reliably manage water quality and feed conversion.
  • Use local knowledge—talk with neighbouring growers to learn what works in micro-climates across Saurashtra.

Scampi culture is a hands-on business: technical knowledge, consistent pond management and good market links make the difference. Begin small, learn fast, and scale once you’ve built routine and markets.

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Ranjeet Natarajan
Ranjeet Natarajan

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

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