Silver fish pond dating

This is actually the pond preparation phase which includes renovation of pond, eradication of undesirable fishes and aquatic weeds, liming of pond bottom and base manuring of pond.

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Salient features are : Under intensive culture practice total nutritional requirements of fish are satisfied with the application of high quality formulated, pellet feed.

In addition, replenishment, aeration and/or recirculation of pond water is carried out in order to maintain oxygen rich, good quality water capable of high production per unit area of culture.

As a result, the average yield is very low, around 1000 kg/ha/year.

The farmers are keeping fish in ponds rather than doing fish culture in ponds.

The bottom soil of an ideal pond should be loamy to clay-loamy.

Such soil is best for fish pond because of its good water retention capacity, rich fertility that supports production of natural food organisms and lower turbidity.By stocking phytoplanktophagus Silver carp in appropriate density certain algal blooming can be controlled.Grass carp on the other hand keeps the macrophyte abundance under control due to its macrovegetation feeding habit and it adds increased amount of partially digested excreta which becomes the feed for the bottom dweller coprofagous common carp.Although, a grow-out pond of 2–5 bigha that retains at least 2 m water round the year is found to be suitable for production of carps.The overall environmental conditions suitable for fish production are better in larger ponds than that of smaller ponds.All these facts suggest that polyculture is the most suitable proposition for fish culture in undrainable tropical ponds.

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