Reservoirs are one of the most exam-friendly topics in Indian fisheries — and one of the most misunderstood. They look like simple lakes behind dams, but for fisheries exams they are a complete system: classification by size, stocking strategy, species choice, productivity figures, cage culture and government programmes. This set of 20 multiple-choice questions covers exactly that system, with answers and short explanations for every question.
Try all 20 before checking the answers. If you score below 15, revise the key-numbers table first, then attempt the set again — most reservoir questions in ICAR, state fisheries and university entrance exams come back to the same handful of facts.
Reservoir fisheries in India: the key numbers first
India’s reservoirs spread over 31.50 lakh hectares and produce approximately 18 lakh tonnes of fish, according to recent Department of Fisheries reporting. That production figure is far higher than the older textbook figure of about 94,000 tonnes — the difference is the story of the last two decades: reservoir productivity rose from about 50 kg per hectare in 2006 to about 100 kg per hectare today, and an ICAR-CIFRI study envisions it reaching 300 kg per hectare.
| Reservoir class | Area | Best fisheries approach |
|---|---|---|
| Small | Less than 1,000 hectares | Culture-based fisheries — stock, grow, harvest |
| Medium | 1,000 to 5,000 hectares | Enhanced capture fisheries |
| Large | More than 5,000 hectares | Enhanced capture fisheries |
| Fact | Figure / answer |
|---|---|
| Total reservoir area in India | 31.50 lakh hectares |
| Approximate reservoir fish production | 18 lakh tonnes |
| State with the largest reservoir area | Madhya Pradesh — about 6 lakh hectares |
| State with the highest number of reservoirs | Tamil Nadu — over 8,000 reservoirs |
| Reservoir productivity, 2006 → today | About 50 kg/ha → about 100 kg/ha |
| CIFRI productivity vision | Up to 300 kg/ha |
| Budget 2026–27 reservoir plan | Integrated development of 500 reservoirs and Amrit Sarovars |
The management logic behind the table matters more than memorising it. Small reservoirs can be managed almost like large ponds: fingerlings are stocked, protected and harvested. Medium and large reservoirs are too big and too open for that — instead, managers enhance the wild capture fishery by stocking, regulating gear and protecting breeding, which is why the correct exam term is “enhanced capture fisheries”.
20 reservoir fisheries MCQs with answers
Q1. A reservoir is best defined as:
(a) A natural lake formed by a river meander
(b) A man-made impoundment created by building a dam across a river
(c) A coastal lagoon separated from the sea
(d) A seasonal floodplain wetland
Answer: (b). Reservoirs are created by damming rivers, mainly for irrigation, hydropower and flood control; fisheries is a secondary but increasingly important use.
Q2. In India’s fisheries classification, a “small” reservoir has an area of:
(a) Less than 100 hectares
(b) Less than 500 hectares
(c) Less than 1,000 hectares
(d) Less than 10,000 hectares
Answer: (c). Small reservoirs are those below 1,000 hectares.
Q3. A “medium” reservoir covers:
(a) 100–500 hectares
(b) 500–1,000 hectares
(c) 1,000–5,000 hectares
(d) 5,000–10,000 hectares
Answer: (c). Medium reservoirs run from 1,000 to 5,000 hectares.
Q4. A “large” reservoir covers:
(a) More than 1,000 hectares
(b) More than 2,500 hectares
(c) More than 5,000 hectares
(d) More than 50,000 hectares
Answer: (c). Large reservoirs exceed 5,000 hectares.
Q5. India’s reservoirs together cover approximately:
(a) 10 lakh hectares
(b) 20 lakh hectares
(c) 31.50 lakh hectares
(d) 50 lakh hectares
Answer: (c). The Department of Fisheries figure quoted in recent government reporting is 31.50 lakh hectares.
Q6. Which state has the largest area under reservoirs in India?
(a) Tamil Nadu
(b) Andhra Pradesh
(c) Madhya Pradesh
(d) Odisha
Answer: (c). Madhya Pradesh has the maximum reservoir area, about 6 lakh hectares.
Q7. Which state has the highest NUMBER of reservoirs in India?
(a) Madhya Pradesh
(b) Tamil Nadu
(c) Karnataka
(d) Maharashtra
Answer: (b). Tamil Nadu has over 8,000 reservoirs — the most in number, even though Madhya Pradesh leads in total area.
Q8. Reservoir fish production in India is approximately:
(a) 94,000 tonnes
(b) 5 lakh tonnes
(c) 18 lakh tonnes
(d) 50 lakh tonnes
Answer: (c). Recent government reporting puts reservoir production at about 18 lakh tonnes. The 94,000-tonne figure is an older estimate from around 2010 — a classic exam trap if you revise from old notes.
Q9. Reservoir fish productivity in India rose from about 50 kg/ha in 2006 to about:
(a) 60 kg/ha
(b) 75 kg/ha
(c) 100 kg/ha
(d) 200 kg/ha
Answer: (c). Productivity roughly doubled, from about 50 kg/ha in 2006 to about 100 kg/ha.
Q10. An ICAR-CIFRI study envisions reservoir productivity reaching up to:
(a) 150 kg/ha
(b) 200 kg/ha
(c) 250 kg/ha
(d) 300 kg/ha
Answer: (d). CIFRI’s study envisions productivity rising from the current 100 kg/ha to 300 kg/ha.
Q11. Small reservoirs are best developed through:
(a) Open-sea cage culture
(b) Culture-based fisheries
(c) Marine ranching
(d) Ornamental fish breeding
Answer: (b). Small reservoirs suit culture-based fisheries: stock fingerlings, let them grow on natural food, and harvest.
Q12. Medium and large reservoirs are best developed through:
(a) Culture-based fisheries alone
(b) Enhanced capture fisheries
(c) Aquarium trade
(d) Brackishwater shrimp farming
Answer: (b). At that scale, managers enhance the capture fishery rather than treating the water body as a pond.
Q13. The species most commonly stocked in Indian reservoirs for culture-based fisheries are:
(a) Trout and mahseer only
(b) Indian major carps — catla, rohu and mrigal
(c) Tuna and sardine
(d) Tilapia only
Answer: (b). Indian major carps dominate reservoir stocking, often alongside common carp in cage trials.
Q14. Among the Indian major carps, the surface feeder is:
(a) Rohu
(b) Mrigal
(c) Catla
(d) Common carp
Answer: (c). Catla feeds at the surface, which is why it pairs with column- and bottom-feeders in composite stocking.
Q15. Among the Indian major carps, the column feeder is:
(a) Catla
(b) Rohu
(c) Mrigal
(d) Silver carp
Answer: (b). Rohu feeds mainly in the water column, between catla above and mrigal below.
Q16. Among the Indian major carps, the bottom feeder is:
(a) Catla
(b) Rohu
(c) Mrigal
(d) Grass carp
Answer: (c). Mrigal feeds at the bottom, completing the three-zone composite culture combination.
Q17. Doyang reservoir, where ICAR-CIFRI started cage culture in 2022, is located in:
(a) Assam
(b) Nagaland
(c) Manipur
(d) Meghalaya
Answer: (b). Doyang reservoir is in Wokha district, Nagaland, with a water spread area of 2,258 hectares.
Q18. In the 2022 Doyang cage-culture trial, fingerlings of which three species were stocked?
(a) Catla, rohu and mrigal
(b) Common carp, pangas and puthi
(c) Tilapia, trout and mahseer
(d) Rohu, silver carp and grass carp
Answer: (b). ICAR-CIFRI stocked 21,600 fingerlings of common carp, pangas and puthi in ten cages of 6 m × 4 m × 4 m at Doyang.
Q19. Halali Dam (Samrat Ashok Sagar), a much-cited reservoir cage-culture success, is in which district and state?
(a) Raisen district, Madhya Pradesh
(b) Indore district, Madhya Pradesh
(c) Nagpur district, Maharashtra
(d) Cuddalore district, Tamil Nadu
Answer: (a). Halali Dam in Raisen district, Madhya Pradesh, has more than 300 cages installed under PMMSY and is a notified reservoir fisheries cluster.
Q20. The Union Budget 2026–27 announced integrated development of:
(a) 100 reservoirs
(b) 250 reservoirs
(c) 500 reservoirs and Amrit Sarovars
(d) 1,000 reservoirs only
Answer: (c). Budget 2026–27 announced integrated development of 500 reservoirs and Amrit Sarovars to raise fish farmers’ incomes and strengthen market access through producer organisations and cooperatives.
How reservoir questions are actually asked
Examiners rarely ask for a single figure in isolation. They combine facts: a question may give the area of a reservoir and ask for its class, then ask which management approach fits that class. Another pattern is the state pair — Madhya Pradesh for area, Tamil Nadu for number — tested as a “which statement is NOT correct” question. A third pattern is the old-versus-new figure trap in Q8: if your notes still say 94,000 tonnes, update them to the recent ~18 lakh tonnes figure and note the date of the source.
For cage culture, remember the Halali pattern rather than a subsidy rate: a notified water body, a fisher cooperative, PMMSY support, and a cold chain to market. If a question asks how a farmer elsewhere can explore cage culture, the safe, correct route is through the District Fisheries Officer and the National Fisheries Digital Platform — there is no single all-India cage application form to quote.
Keep practising
Reservoir facts connect directly to other high-weight topics. Pair this set with our Indian fisheries schemes MCQs for PMMSY and programme questions, our water quality MCQs for the dissolved oxygen, pH and productivity concepts behind the 50→100 kg/ha rise, and our Halali reservoir cage-culture story for the real-world case behind Q19. For processing and value-chain questions, try our fish processing MCQs.
FAQs
Are reservoir fisheries capture or culture? Both, by size: small reservoirs suit culture-based fisheries, while medium and large reservoirs suit enhanced capture fisheries.
Why is reservoir productivity still called “untapped potential”? Because even at about 100 kg/ha, production sits well below the 300 kg/ha that CIFRI’s study envisions — the gap is the opportunity examiners and policymakers both point to.
Which institute leads reservoir fisheries research in India? ICAR-Central Inland Fisheries Research Institute (CIFRI), Barrackpore, including its cage-culture work at reservoirs such as Doyang.
Sources and fact-check
Figures and cases in this post were checked on 2 November 2026 against: the Press Information Bureau / Department of Fisheries reporting of reservoir resources (31.50 lakh ha); the Department of Fisheries reservoir-fisheries account summarised by ICSF (31.50 lakh ha, ~18 lakh tonnes, Madhya Pradesh ~6 lakh ha, Tamil Nadu over 8,000 reservoirs, 50→100 kg/ha, CIFRI 300 kg/ha vision, small/medium/large classification); ICAR-CIFRI’s Doyang reservoir cage-culture report (Wokha, Nagaland; 2,258 ha; 21,600 fingerlings; ten 6 m × 4 m × 4 m cages; common carp, pangas, puthi); and Budget 2026–27 reservoir coverage (500 reservoirs and Amrit Sarovars). Official links: PIB — fisheries resources, ICAR — CIFRI cage culture at Doyang, ICSF — harnessing reservoir fisheries. The featured image is an illustration, not a photograph of a named reservoir.