Key Survey Findings
- Total dolphins recorded: More than 680 individuals
- Coastline coverage: 4,087 km of Gujarat's coastal area
- Survey duration: Latest comprehensive dolphin survey
Major Survey Areas
The dolphin survey covered extensive marine and coastal regions of Gujarat:
- Marine National Park and Marine Sanctuary
- Southern Gulf of Kutch
- Northern Gulf of Kutch
- Coastal areas of Bhavnagar
- Coastal areas of Morbi
The Gulf of Kutch has emerged as a particularly important dolphin habitat, supporting significant populations of both species.
Dolphin Species Found in Gujarat
1. Indo-Pacific Humpback Dolphin (Sousa plumbea)
- Colour: Mostly grey
- Distinguishing feature: Small triangular dorsal fin on a less prominent hump
- Distribution: Coastal waters of Indian Ocean from South Africa, East African coast, Middle East, to west coast of India
- Habitat: Shallow coastal waters, estuaries, nearshore marine habitats
- Feeding: Opportunistic feeders eating mackerel, mullet, and sardines
- Conservation Status: Endangered (IUCN)
- CITES Status: Appendix I
2. Bottlenose Dolphin (Tursiops truncatus)
- Colour: Grey with lighter underside
- Distinguishing feature: Robust body with short, thick snout (rostrum)
- Distribution: Tropical, subtropical, and temperate waters worldwide
- Habitat: Both coastal and offshore waters; commonly seen in harbours, lagoons, estuaries
- Feeding: Fish, squid, crustaceans (crabs, shrimps); swallow prey whole
- Conservation Status:
- Common Bottlenose Dolphin: Least Concern (IUCN)
- Indo-Pacific Bottlenose Dolphin: Near Threatened (IUCN)
- CITES Status: Appendix II
Legal Protection Framework
| Aspect | Provision |
|---|---|
| Domestic Law | Schedule I of Wildlife (Protection) Act, 1972 |
| International Convention | CITES (Convention on International Trade in Endangered Species) |
| Humpback Dolphin | Appendix I (Appendices may vary by subspecies) |
| Bottlenose Dolphin | Appendix II |
Significance of Schedule I Protection
- Highest level of protection under Indian wildlife law
- Provides rigorous penalties for hunting, trading, or disturbing these species
- Recognizes dolphins as species of paramount importance to India's biodiversity
Major Threats to Dolphins
Threats to Humpback Dolphins:
- Pollution
- Habitat degradation
- Vessel traffic
- Underwater noise pollution
- Accidental entanglement in fishing nets
Threats to Bottlenose Dolphins:
- Bycatch in fishing operations
- Pollution
- Habitat degradation
- Vessel strikes
- Underwater noise
- Tourism pressure
- Prey depletion
Importance for India
- Biodiversity Hotspot: Gujarat's marine waters represent a critical habitat for marine mammals
- Marine Protected Areas: The presence of dolphins in Marine National Park and Sanctuary validates conservation efforts
- Ecological Indicator: Dolphins serve as indicator species for marine ecosystem health
- International Cooperation: India's participation in global research initiatives like dolphin-fisher mutualism studies
- Coastal Economy: Dolphin tourism and marine biodiversity contribute to coastal livelihoods
Constitutional and Policy Context
- Article 48A: Directive Principles of State Policy directs protection of wildlife and forests
- Environment (Protection) Act, 1986: Provides framework for protecting marine habitats
- Coastal Regulation Zone (CRZ) notifications: Regulate activities in coastal areas
- Marine Fishing Regulation Acts: State-level regulations to manage fishing activities