RACEWAYS HAVE SOME DISADVANTAGES
These high densities fish culture system have
distinct disadvantages including: More rapid disease spread, less reaction time
when problems occur, and large volumes of effluent with dilute fish wastes.In general,
water cannot be economically pumped through raceways it must
flow through them by gravity.
The
disadvantages of raceways are primarily related to their need for large
constant flows of consistent, high-quality water. Also, the viability of the project often requires that the water gravity flows through
a series of raceways before it is released. This adds a requirement for an
elevation of the water source and suitable topography for the gravity flow
between raceways and so it can be said that the site selection is not in the farmer's hand.
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