Explore essential concepts behind eco-friendly fishery management and sustainable aquaculture methods widely adopted in India. Learn about practical strategies that promote environmental health, improve fish yields, and support rural livelihoods.
Which fish species is commonly considered ideal for sustainable pond culture in India due to its fast growth rate and compatibility with polyculture systems?
Explanation: Rohu is well-suited for sustainable fish farming in India due to its adaptability and efficiency in polyculture with other carp species. Tilapia, while fast-growing, may not always be preferred due to ecological concerns. Shark and starfish are not commonly farmed in Indian inland pond systems and are unsuitable for freshwater culture.
In an integrated fish farming approach, how are agricultural by-products typically utilized within pond ecosystems?
Explanation: Agricultural by-products such as rice bran and oil cakes can be used directly as supplementary feed for fish, enhancing sustainability by recycling farm waste. Lowering pond pH is not a primary role, ornamental decoration does not promote sustainability, and removing all nutrients from ponds would harm fish productivity.
Maintaining which of the following water parameters is most important for healthy fish growth in sustainable aquaculture?
Explanation: Dissolved oxygen is crucial for fish survival and growth; low levels can lead to stress or mortality. Mercury and radioactivity should ideally be absent, not maintained. Salinity is relevant for brackish or marine systems, not for typical freshwater pond farming in India.
Which sustainable practice is recommended to minimize disease outbreaks in Indian fish farms?
Explanation: Regular pond sanitation removes waste and helps prevent disease outbreaks naturally. Overstocking and allowing sewage inflow increase disease risk, while excessive antibiotic use can cause resistance and environmental issues, making them less sustainable.
What is a key socio-economic benefit of adopting sustainable fish farming practices in rural India?
Explanation: Sustainable practices can create steady rural jobs by supporting local input use and integrated activities. Complete automation is expensive and rare in rural India, eliminating all expenses is unrealistic, and while export is possible, it cannot be guaranteed every season due to various factors.