The Ganges Soft-Shell Turtle
Source: TH
Summary
India’s first satellite-tagged Ganges Soft-Shell Turtle was released into its natural habitat along the northern bank of the Brahmaputra River inside Kaziranga National Park and Tiger Reserve, Assam.
The Ganges Soft-Shell Turtle (Nilssonia gangetica) — also called the Indian Softshell Turtle — is a large, highly aquatic freshwater reptile of the family Trionychidae. It functions as both an apex predator and a scavenger, cleaning rivers by feeding on dead organic and animal matter, and is therefore a bio-indicator of riverine health.
The species is listed as Endangered (IUCN) and enjoys the highest level of domestic protection under Schedule I (Part II) of the Wildlife (Protection) Act, 1972. The satellite-tagging project — a first for the species in India — will help track movement, habitat use, and threats in the Brahmaputra basin, supporting landscape-based freshwater conservation.
Background & Concept
What is the Ganges Soft-Shell Turtle?
The Ganges Soft-Shell Turtle (Nilssonia gangetica) belongs to the family Trionychidae — characterised by a flattened, leathery, and pliable carapace rather than the bony, hard shell of typical turtles. It is one of the largest freshwater turtles in South Asia, reaching a carapace length of up to 94 cm (37 inches).
Ecological Role
- Apex riverine predator and scavenger.
- Bio-cleaner of rivers — consumes carrion, decaying matter, and diseased fish.
- Indicator species — sensitive to pollution, sand mining, and altered flow regimes.
- Plays a role in nutrient cycling in freshwater ecosystems.
About the Satellite Tagging Project
- Lead Body: Released inside Kaziranga National Park and Tiger Reserve, Assam — a key Brahmaputra-floodplain habitat.
- Implementing Partners: The project typically involves the Wildlife Institute of India (WII), the Turtle Survival Alliance (TSA) – India, and the Assam Forest Department.
- Objective: Track movement, habitat use, breeding/nesting sites, threats (poaching, by-catch, habitat degradation) — and support science-based recovery planning.
- Significance: First satellite-tagged Ganges soft-shell turtle in India — opens a new era for telemetry-based freshwater reptile conservation.
About Kaziranga National Park
- Located in Assam, on the floodplains of the Brahmaputra River.
- UNESCO World Heritage Site (1985), Tiger Reserve (2006).
- Famous for the world’s largest population of the one-horned Indian rhinoceros.
- Hosts a rich freshwater biodiversity — including river dolphins, Ganges soft-shell turtles, smooth-coated otters, and several softshell and hard-shell turtles.
Key Highlights
| Feature | Detail |
|---|---|
| Scientific name | Nilssonia gangetica |
| Family | Trionychidae (soft-shell turtles) |
| IUCN Status | Endangered |
| WPA, 1972 | Schedule I (Part II) — highest protection |
| CITES | Appendix I |
| Distribution (South Asia) | India, Bangladesh, Pakistan, Afghanistan |
| Indian River Basins | Indus, Ganges/Yamuna, Mahanadi, Narmada, Brahmaputra |
| Habitat | Deep, turbid rivers, large streams, canals, lakes, reservoirs (muddy/sandy bottoms) |
| Maximum size | ~94 cm carapace length |
| Diet | Fish, mollusks, frogs, carrion, aquatic vegetation (omnivore) |
| First Satellite-Tagged in India | Released in Kaziranga, Brahmaputra basin |
Key Characteristics
- Head Markings: Distinct black arrowhead-shaped markings and inverted-V streaks on top of an olive-coloured head — a key field ID feature.
- Carapace: Flattened, compressed, smooth leathery shell with a yellow border; lacks bony scutes of hard-shell turtles.
- Long Tube-like Snout: Acts as a snorkel, allowing the turtle to breathe while remaining almost fully submerged — a classic ambush-predator adaptation.
- Plastron: Eight pairs of costal plates with large plastral callosities; the last pair is well-developed and touching.
- Dorsal Skin in Young: Shows longitudinal ridges of small tubercles, which become smoother with age.
- Lifestyle: Largely solitary, highly aquatic, often buried in sand/mud bottoms with only the snout out.
India’s Position
India hosts 29 species of turtles and tortoises (out of ~360 globally), of which a large proportion are threatened. India has multiple frameworks for turtle conservation:
- Schedule I (WPA, 1972) for most threatened species (Ganges & Indian softshell, Black softshell, Northern River Terrapin, Red-crowned roofed turtle).
- Conservation breeding programmes at Bhitarkanika (Odisha), Chambal Sanctuary (Madhya Pradesh, Rajasthan, UP), Kaziranga, Sangti Valley (Arunachal Pradesh).
- National Chambal Sanctuary — major stronghold of the Red-crowned roofed turtle, Indian softshell turtle, and gharial.
- Namami Gange Mission (2014) — supports conservation of Ganges Aquatic Life including turtles.
- National Mission for Clean Ganga (NMCG).
- Project Dolphin (2020) — covers riverine biodiversity holistically.
- Indian Olive Ridley Turtle Conservation — major nesting at Gahirmatha, Odisha (covered separately under sea-turtle conservation).
Keywords & Definitions
▸ Ganges Soft-Shell Turtle (Nilssonia gangetica): A large freshwater turtle of family Trionychidae, found in major South Asian river systems; an apex riverine scavenger.
▸ Trionychidae: The family of soft-shell turtles, characterised by a leathery, pliable carapace without bony scutes.
▸ Carapace: The upper shell of a turtle; in softshell turtles, it is flat and leathery.
▸ Plastron: The lower (ventral) shell of a turtle.
▸ Calipee: A cartilaginous, jelly-like part of the soft-shell turtle’s body (along the inner shell), heavily traded illegally for use in soups and traditional remedies in East and Southeast Asia.
▸ Kaziranga National Park and Tiger Reserve: Located in Assam on the Brahmaputra floodplains; UNESCO World Heritage Site (1985); Tiger Reserve (2006); famous for one-horned rhinos.
▸ Brahmaputra River: A major transboundary river of South Asia, originating in Tibet (as Yarlung Tsangpo), flowing through Arunachal Pradesh, Assam, and into Bangladesh as the Jamuna.
▸ Wildlife (Protection) Act, 1972 — Schedule I: Highest tier of protection in India; offences attract the harshest penalties.
▸ IUCN Red List: Global inventory of conservation status — categories: Extinct, Extinct in the Wild, Critically Endangered, Endangered, Vulnerable, Near Threatened, Least Concern, Data Deficient.
▸ CITES (Convention on International Trade in Endangered Species): 1973 international treaty regulating cross-border wildlife trade; Appendix I bans commercial international trade.
▸ Wildlife Institute of India (WII): Autonomous institute under MoEFCC, established 1982 at Dehradun; lead body for wildlife research and training in India.
▸ Turtle Survival Alliance (TSA): A global organisation working on freshwater turtle and tortoise conservation; runs major programmes in India.
▸ Satellite Tagging / Telemetry: Use of satellite-linked transmitters attached to animals to track movement, habitat use, and behaviour.
▸ Namami Gange Programme: Launched in 2014 under the Ministry of Jal Shakti (NMCG); flagship integrated programme for Ganga rejuvenation.
▸ National Mission for Clean Ganga (NMCG): Implementation arm of Namami Gange, established under the Environment (Protection) Act, 1986.
▸ Project Dolphin (2020): A central scheme for conservation of riverine and oceanic dolphins, alongside broader riverine ecosystems.
▸ National Chambal Sanctuary: A tri-state sanctuary (MP, Rajasthan, UP) along the Chambal River — key habitat for gharial, freshwater turtles, and Gangetic dolphin.
▸ Bio-Indicator Species: A species whose presence, absence, or condition reflects the overall health of an ecosystem.
▸ Apex Predator / Scavenger: A species at the top of its food chain; scavengers (like soft-shell turtles) play critical roles in nutrient recycling.
▸ Temperature-Dependent Sex Determination (TSD): A phenomenon in many reptiles (including turtles) where incubation temperature decides hatchling sex — making them highly climate-vulnerable.
▸ Convention on Biological Diversity (CBD): International treaty (1992) for conservation of biological diversity, sustainable use of its components, and fair sharing of benefits.
▸ National Wildlife Action Plan (NWAP) 2017–2031: India’s strategic plan for wildlife conservation.
Question Section (MCQs)
Q1. The scientific name of the Ganges Soft-Shell Turtle is:
(a) Lissemys punctata (b) Nilssonia gangetica (c) Chitra indica (d) Pelochelys cantorii
Q2. Consider the following statements regarding the Ganges Soft-Shell Turtle:
- It belongs to the family Trionychidae.
- It is listed as ‘Endangered’ on the IUCN Red List.
- It enjoys protection under Schedule I (Part II) of the Wildlife (Protection) Act, 1972.
Which of the statements given above are correct?
(a) 1 and 2 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3
Q3. India’s first satellite-tagged Ganges Soft-Shell Turtle was released in which of the following national parks?
(a) Dudhwa National Park (b) Manas National Park (c) Kaziranga National Park and Tiger Reserve (d) Sundarbans National Park
Q4. Which of the following river basins host the Ganges Soft-Shell Turtle in India?
- Indus
- Ganges/Yamuna
- Mahanadi
- Narmada
- Brahmaputra
Select the correct answer using the code given below:
(a) 1, 2 and 3 only (b) 2, 3 and 5 only (c) 1, 2, 3 and 5 only (d) 1, 2, 3, 4 and 5
Q5. Consider the following anatomical features of the Ganges Soft-Shell Turtle:
- A flattened, compressed and smooth leathery carapace.
- A long, tube-like snout that acts as a snorkel.
- A bony, hard scutellated shell similar to land tortoises.
Which of the statements given above are correct?
(a) 1 and 2 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3
Q6. Kaziranga National Park, where the tagged turtle was released, is located on the floodplains of which river?
(a) Ganga (b) Mahanadi (c) Brahmaputra (d) Subansiri
Q7. ‘Calipee’, often heard in the context of soft-shell turtle smuggling, refers to:
(a) An illegal hunting net used for turtles (b) A cartilaginous body part of the turtle in high demand for soup (c) A traditional medicine made from turtle eggs (d) A turtle nesting beach in coastal Odisha
Q8. Consider the following statements about the Wildlife Institute of India (WII):
- It is an autonomous institute under the MoEFCC.
- It was established in 1982 at Dehradun.
- It functions as a research and training body for wildlife conservation.
Which of the statements given above are correct?
(a) 1 and 2 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3
Q9. The Namami Gange Programme, often linked with the conservation of Gangetic species, is implemented under the:
(a) Ministry of Environment, Forest and Climate Change (b) Ministry of Jal Shakti through NMCG (c) Ministry of Agriculture and Farmers Welfare (d) Ministry of Tourism
Q10. Match the following:
| Species | IUCN Status |
|---|---|
| A. Ganges Soft-Shell Turtle | 1. Critically Endangered |
| B. Indian Gharial | 2. Endangered |
| C. Gangetic Dolphin | 3. Endangered |
| D. Olive Ridley Turtle | 4. Vulnerable |
Select the correct answer:
(a) A-2, B-1, C-3, D-4 (b) A-1, B-2, C-3, D-4 (c) A-3, B-1, C-2, D-4 (d) A-2, B-3, C-1, D-4
Answer Key with Explanations
▸ Q1 → (b) The scientific name of the Ganges Soft-Shell Turtle is Nilssonia gangetica. Lissemys punctata is the Indian Flapshell Turtle; Chitra indica is the Narrow-headed Soft-Shell Turtle; Pelochelys cantorii is Cantor’s Giant Soft-Shell Turtle.
▸ Q2 → (d) 1, 2 and 3 All three statements are correct — it belongs to family Trionychidae, is Endangered on the IUCN Red List, and is protected under Schedule I (Part II) of the Wildlife (Protection) Act, 1972.
▸ Q3 → (c) Kaziranga National Park and Tiger Reserve India’s first satellite-tagged Ganges Soft-Shell Turtle was released inside Kaziranga National Park and Tiger Reserve, Assam, on the northern bank of the Brahmaputra.
▸ Q4 → (d) 1, 2, 3, 4 and 5 In India, the species is found across the Indus, Ganges/Yamuna, Mahanadi, Narmada, and Brahmaputra river basins.
▸ Q5 → (a) 1 and 2 only Statements 1 and 2 are correct. Statement 3 is wrong — soft-shell turtles lack bony scutes; their shell is leathery and pliable, distinct from hard-shell turtles and tortoises.
▸ Q6 → (c) Brahmaputra Kaziranga National Park is located on the floodplains of the Brahmaputra River in Assam, hosting one-horned rhinos, tigers, wild buffalo, river dolphins, and the Ganges soft-shell turtle.
▸ Q7 → (b) Calipee is the cartilaginous body part of soft-shell turtles, found along the inner shell, in high illegal demand for soups and traditional medicines in East and Southeast Asia.
▸ Q8 → (d) 1, 2 and 3 All three statements are correct. WII, established in 1982 at Dehradun under MoEFCC, is the lead body for wildlife research and training in India.
▸ Q9 → (b) Namami Gange is implemented under the Ministry of Jal Shakti, through the National Mission for Clean Ganga (NMCG) — established under the Environment (Protection) Act, 1986.
▸ Q10 → (a) A-2, B-1, C-3, D-4 Ganges Soft-Shell Turtle — Endangered; Indian Gharial — Critically Endangered; Gangetic Dolphin — Endangered; Olive Ridley Turtle — Vulnerable.
