Introduction to Freshwater Aquaculture and Fisheries Resources
This domain tests whether you can distinguish freshwater aquaculture from capture fisheries and describe Maharashtra’s pond, tank and reservoir resources, cultivable species groups and culture intensity. Expect definition, resource classification and system-type questions rather than hatchery detail.
Core rules
- Aquaculture is controlled rearing of aquatic organisms; fisheries also includes capture from natural waters.
- Freshwater systems include ponds, tanks, reservoirs, rivers and canals; ponds are the main controllable unit for carp culture.
- Culture intensity: extensive (low stocking, no feed), semi-intensive (stocking plus feed and fertilizer), intensive (high stocking, aeration, formulated feed).
- Cultivable groups include Indian major carps (catla, rohu, mrigal), exotic carps (silver, grass, common) and air-breathing fishes.
- Maharashtra’s long coast and inland waters support both marine and freshwater production; inland aquaculture depends on impounded water, tanks and farm ponds.
Worked example
A 1-ha pond is stocked with 4,000 fingerlings, fertilized weekly and given supplementary feed, but has no aerators. Classify it. Reasoning: stocking is moderate, feed and fertilizer are used, and aeration is absent. It is semi-intensive, not intensive, because intensive systems rely on high density and mechanical aeration; it is not extensive because feed and fertilizer are added.
Traps
Do not call every fish harvest aquaculture; wild catch is capture. Do not treat reservoir capture and pond culture as the same system. Do not classify a system as intensive only because feed is used.